Package groovy.sql

Class Sql

  • All Implemented Interfaces:
    AutoCloseable
    Direct Known Subclasses:
    DataSet
    public class Sql
extends Object
implements AutoCloseable
    A facade over Java's normal JDBC APIs providing greatly simplified resource management and result set handling. Under the covers the facade hides away details associated with getting connections, constructing and configuring statements, interacting with the connection, closing resources and logging errors. Special features of the facade include using closures to iterate through result sets, a special GString syntax for representing prepared statements and treating result sets like collections of maps with the normal Groovy collection methods available.

    Typical usage

    First you need to set up your sql instance. There are several constructors and a few newInstance factory methods available to do this. In simple cases, you can just provide the necessary details to set up a connection (e.g. for hsqldb): 
     def db = [url:'jdbc:hsqldb:mem:testDB', user:'sa', password:'', driver:'org.hsqldb.jdbc.JDBCDriver']
 def sql = Sql.newInstance(db.url, db.user, db.password, db.driver)
    or if you have an existing connection (perhaps from a connection pool) or a datasource use one of the constructors: 
     def sql = new Sql(datasource)
    Now you can invoke sql, e.g. to create a table: 
     sql.execute '''
     create table PROJECT (
         id integer not null,
         name varchar(50),
         url varchar(100),
     )
 '''
    Or insert a row using JDBC PreparedStatement inspired syntax: 
     def params = [10, 'Groovy', 'http://groovy.codehaus.org']
 sql.execute 'insert into PROJECT (id, name, url) values (?, ?, ?)', params
    Or insert a row using GString syntax: 
     def map = [id:20, name:'Grails', url:'http://grails.codehaus.org']
 sql.execute "insert into PROJECT (id, name, url) values ($map.id, $map.name, $map.url)"
    Or a row update: 
     def newUrl = 'http://grails.org'
 def project = 'Grails'
 sql.executeUpdate "update PROJECT set url=$newUrl where name=$project"
    Now try a query using eachRow: 
     println 'Some GR8 projects:'
 sql.eachRow('select * from PROJECT') { row ->
     println "${row.name.padRight(10)} ($row.url)"
 }
    Which will produce something like this: 
     Some GR8 projects:
 Groovy     (http://groovy.codehaus.org)
 Grails     (http://grails.org)
 Griffon    (http://griffon.codehaus.org)
 Gradle     (http://gradle.org)
    Now try a query using rows: 
     def rows = sql.rows("select * from PROJECT where name like 'Gra%'")
 assert rows.size() == 2
 println rows.join('\n')
    with output like this: 
     [ID:20, NAME:Grails, URL:http://grails.org]
 [ID:40, NAME:Gradle, URL:http://gradle.org]
    Also, eachRow and rows support paging. Here's an example: 
     sql.eachRow('select * from PROJECT', 2, 2) { row ->
     println "${row.name.padRight(10)} ($row.url)"
 }
    Which will start at the second row and return a maximum of 2 rows. Here's an example result: 
     Grails     (http://grails.org)
 Griffon    (http://griffon.codehaus.org)
    Finally, we should clean up: 
     sql.close()
    If we are using a DataSource and we haven't enabled statement caching, then strictly speaking the final close() method isn't required - as all connection handling is performed transparently on our behalf; however, it doesn't hurt to have it there as it will return silently in that case.

    If instead of newInstance you use withInstance, then close() will be called automatically for you.

    Avoiding SQL injection

    If you find yourself creating queries based on any kind of input from the user or a 3rd party application you might wish to avoid the pure string method variants in this class. While this is safe: sql.firstRow('select * from PersonTable') This example is potentially at risk of SQL injection: sql.firstRow('select * from PersonTable where SurnameColumn = ' + userInput) This in turn will be fine if 'userInput' is something like 'Smith' but maybe not so fine if 'userInput' is something like 'Smith; DROP table PersonTable'. Instead, use one of the variants with parameters and placeholders: sql.firstRow("select * from PersonTable where SurnameColumn = ?", [userInput]) or the GString variants which will be converted to the placeholder variants under the covers: sql.firstRow("select * from PersonTable where SurnameColumn = $userInput") or the named parameter variants discussed next.

    Named and named ordinal parameters

    Several of the methods in this class (ones which have a String-based sql query and params in a List<Object> or Object[] or Map) support named or named ordinal parameters. These methods are useful for queries with large numbers of parameters - though the GString variations are often preferred in such cases too. Reminder: when you see a variant with Object[] as the type of the last parameter, Groovy allows vararg style parameters so you don't explicitly need to create an Object[] and if the first parameter is of type Map, Groovy supports named arguments - examples of both are contained in the examples below.

    Named parameter queries use placeholder values in the query String. Two forms are supported ':propname1' and '?.propname2'. For these variations, a single model object is supplied in the parameter list/array/map. The propname refers to a property of that model object. The model object could be a map, Expando or domain class instance. Here are some examples: 

     // using rows() with a named parameter with the parameter supplied in a map
 println sql.rows('select * from PROJECT where name=:foo', [foo:'Gradle'])
 // as above for eachRow()
 sql.eachRow('select * from PROJECT where name=:foo', [foo:'Gradle']) {
     // process row
 }

 // an example using both the ':' and '?.' variants of the notation
 println sql.rows('select * from PROJECT where name=:foo and id=?.bar', [foo:'Gradle', bar:40])
 // as above but using Groovy's named arguments instead of an explicit map
 println sql.rows('select * from PROJECT where name=:foo and id=?.bar', foo:'Gradle', bar:40)

 // an example showing rows() with a domain object instead of a map
 class MyDomainClass { def baz = 'Griffon' }
 println sql.rows('select * from PROJECT where name=?.baz', new MyDomainClass())
 // as above for eachRow() with the domain object supplied in a list
 sql.eachRow('select * from PROJECT where name=?.baz', [new MyDomainClass()]) {
     // process row
 }
    Named ordinal parameter queries have multiple model objects with the index number (starting at 1) also supplied in the placeholder. Only the question mark variation of placeholder is supported. Here are some examples: 
     // an example showing the model objects as vararg style parameters (since rows() has an Object[] variant)
 println sql.rows("select * from PROJECT where name=?1.baz and id=?2.num", new MyDomainClass(), [num:30])

 // an example showing the model objects (one domain class and one map) provided in a list
 sql.eachRow("select * from PROJECT where name=?1.baz and id=?2.num", [new MyDomainClass(), [num:30]]) {
     // do something with row
 }

    More details

    See the method and constructor JavaDoc for more details.

    For advanced usage, the class provides numerous extension points for overriding the facade behavior associated with the various aspects of managing the interaction with the underlying database.

    This class is not thread-safe.

    • Constructor Detail

      • Sql

        public Sql​(DataSource dataSource)
        Constructs an SQL instance using the given DataSource. Each operation will use a Connection from the DataSource pool and close it when the operation is completed putting it back into the pool.
        Parameters:
        dataSource - the DataSource to use

      • Sql

        public Sql​(Connection connection)
        Constructs an SQL instance using the given Connection. It is the caller's responsibility to close the Connection after the Sql instance has been used. Depending on which features you are using, you may be able to do this on the connection object directly but the preferred approach is to call the close() method which will close the connection but also free any cached resources.
        Parameters:
        connection - the Connection to use

      • Sql

        public Sql​(Sql parent)

    • Method Detail

      • newInstance

        public static Sql newInstance​(String url)
                       throws SQLException
        Creates a new Sql instance given a JDBC connection URL.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs

      • withInstance

        public static void withInstance​(String url,
                                Closure c)
                         throws SQLException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        See Also:
        newInstance(String)

      • newInstance

        public static Sql newInstance​(String url,
                              Properties properties)
                       throws SQLException
        Creates a new Sql instance given a JDBC connection URL and some properties.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        properties - a list of arbitrary string tag/value pairs as connection arguments; normally at least a "user" and "password" property should be included
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs

      • withInstance

        public static void withInstance​(String url,
                                Properties properties,
                                Closure c)
                         throws SQLException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL and properties. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        properties - a list of arbitrary string tag/value pairs as connection arguments; normally at least a "user" and "password" property should be included
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        See Also:
        newInstance(String, java.util.Properties)

      • newInstance

        public static Sql newInstance​(String url,
                              Properties properties,
                              String driverClassName)
                       throws SQLException,
                              ClassNotFoundException
        Creates a new Sql instance given a JDBC connection URL, some properties and a driver class name.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        properties - a list of arbitrary string tag/value pairs as connection arguments; normally at least a "user" and "password" property should be included
        driverClassName - the fully qualified class name of the driver class
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded

      • withInstance

        public static void withInstance​(String url,
                                Properties properties,
                                String driverClassName,
                                Closure c)
                         throws SQLException,
                                ClassNotFoundException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL, properties and driver classname. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        properties - a list of arbitrary string tag/value pairs as connection arguments; normally at least a "user" and "password" property should be included
        driverClassName - the fully qualified class name of the driver class
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded
        See Also:
        newInstance(String, java.util.Properties, String)

      • newInstance

        public static Sql newInstance​(String url,
                              String user,
                              String password)
                       throws SQLException
        Creates a new Sql instance given a JDBC connection URL, a username and a password.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        user - the database user on whose behalf the connection is being made
        password - the user's password
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs

      • withInstance

        public static void withInstance​(String url,
                                String user,
                                String password,
                                Closure c)
                         throws SQLException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL, user and password. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        user - the database user on whose behalf the connection is being made
        password - the user's password
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        See Also:
        newInstance(String, String, String)

      • newInstance

        public static Sql newInstance​(String url,
                              String user,
                              String password,
                              String driverClassName)
                       throws SQLException,
                              ClassNotFoundException
        Creates a new Sql instance given a JDBC connection URL, a username, a password and a driver class name.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        user - the database user on whose behalf the connection is being made
        password - the user's password
        driverClassName - the fully qualified class name of the driver class
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded

      • withInstance

        public static void withInstance​(String url,
                                String user,
                                String password,
                                String driverClassName,
                                Closure c)
                         throws SQLException,
                                ClassNotFoundException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        user - the database user on whose behalf the connection is being made
        password - the user's password
        driverClassName - the fully qualified class name of the driver class
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded
        See Also:
        newInstance(String, String, String, String)

      • newInstance

        public static Sql newInstance​(String url,
                              String driverClassName)
                       throws SQLException,
                              ClassNotFoundException
        Creates a new Sql instance given a JDBC connection URL and a driver class name.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        driverClassName - the fully qualified class name of the driver class
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded

      • withInstance

        public static void withInstance​(String url,
                                String driverClassName,
                                Closure c)
                         throws SQLException,
                                ClassNotFoundException
        Invokes a closure passing it a new Sql instance created from the given JDBC connection URL. The created connection will be closed if required.
        Parameters:
        url - a database url of the form jdbc:subprotocol:subname
        driverClassName - the fully qualified class name of the driver class
        c - the Closure to call
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded
        See Also:
        newInstance(String, String)

      • newInstance

        public static Sql newInstance​(Map<String,​Object> args)
                       throws SQLException,
                              ClassNotFoundException
        Creates a new Sql instance given parameters in a Map. Recognized keys for the Map include: 
         driverClassName the fully qualified class name of the driver class
 driver          a synonym for driverClassName
 url             a database url of the form: jdbc:subprotocol:subname
 user            the database user on whose behalf the connection is being made
 password        the user's password
 properties      a list of arbitrary string tag/value pairs as connection arguments;
                 normally at least a "user" and "password" property should be included
 other           any of the public setter methods of this class may be used with property notation
                 e.g. cacheStatements: true, resultSetConcurrency: ResultSet.CONCUR_READ_ONLY
        Of these, 'url' is required. Others may be needed depending on your database.
        If 'properties' is supplied, neither 'user' nor 'password' should be supplied.
        If one of 'user' or 'password' is supplied, both should be supplied.

        Example usage: 

         import groovy.sql.Sql
 import static java.sql.ResultSet.*

 def sql = Sql.newInstance(
     url:'jdbc:hsqldb:mem:testDB',
     user:'sa',
     password:'',
     driver:'org.hsqldb.jdbc.JDBCDriver',
     cacheStatements: true,
     resultSetConcurrency: CONCUR_READ_ONLY
 )
        Parameters:
        args - a Map contain further arguments
        Returns:
        a new Sql instance with a connection
        Throws:
        SQLException - if a database access error occurs
        ClassNotFoundException - if the driver class cannot be found or loaded

      • getResultSetType

        public int getResultSetType()
        Gets the resultSetType for statements created using the connection.
        Returns:
        the current resultSetType value
        Since:
        1.5.2

      • setResultSetType

        public void setResultSetType​(int resultSetType)
        Sets the resultSetType for statements created using the connection. May cause SQLFeatureNotSupportedException exceptions to occur if the underlying database doesn't support the requested type value.
        Parameters:
        resultSetType - one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
        Since:
        1.5.2

      • getResultSetConcurrency

        public int getResultSetConcurrency()
        Gets the resultSetConcurrency for statements created using the connection.
        Returns:
        the current resultSetConcurrency value
        Since:
        1.5.2

      • setResultSetConcurrency

        public void setResultSetConcurrency​(int resultSetConcurrency)
        Sets the resultSetConcurrency for statements created using the connection. May cause SQLFeatureNotSupportedException exceptions to occur if the underlying database doesn't support the requested concurrency value.
        Parameters:
        resultSetConcurrency - one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
        Since:
        1.5.2

      • getResultSetHoldability

        public int getResultSetHoldability()
        Gets the resultSetHoldability for statements created using the connection.
        Returns:
        the current resultSetHoldability value or -1 if not set
        Since:
        1.5.2

      • setResultSetHoldability

        public void setResultSetHoldability​(int resultSetHoldability)
        Sets the resultSetHoldability for statements created using the connection. May cause SQLFeatureNotSupportedException exceptions to occur if the underlying database doesn't support the requested holdability value.
        Parameters:
        resultSetHoldability - one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
        Since:
        1.5.2

      • loadDriver

        public static void loadDriver​(String driverClassName)
                       throws ClassNotFoundException
        Attempts to load the JDBC driver on the thread, current or system class loaders
        Parameters:
        driverClassName - the fully qualified class name of the driver class
        Throws:
        ClassNotFoundException - if the class cannot be found or loaded

      • in

        public static InParameter in​(int type,
                             Object value)
        Create a new InParameter
        Parameters:
        type - the JDBC data type
        value - the object value
        Returns:
        an InParameter

      • out

        public static OutParameter out​(int type)
        Create a new OutParameter
        Parameters:
        type - the JDBC data type.
        Returns:
        an OutParameter

      • inout

        public static InOutParameter inout​(InParameter in)
        Create an inout parameter using this in parameter.
        Parameters:
        in - the InParameter of interest
        Returns:
        the resulting InOutParameter

      • resultSet

        public static ResultSetOutParameter resultSet​(int type)
        Create a new ResultSetOutParameter
        Parameters:
        type - the JDBC data type.
        Returns:
        a ResultSetOutParameter

      • expand

        public static ExpandedVariable expand​(Object object)
        When using GString SQL queries, allows a variable to be expanded in the Sql string rather than representing an sql parameter.

        Example usage: 

         def fieldName = 'firstname'
 def fieldOp = Sql.expand('like')
 def fieldVal = '%a%'
 sql.query "select * from PERSON where ${Sql.expand(fieldName)} $fieldOp ${fieldVal}", { ResultSet rs ->
     while (rs.next()) println rs.getString('firstname')
 }
 // query will be 'select * from PERSON where firstname like ?'
 // params will be [fieldVal]
        Parameters:
        object - the object of interest
        Returns:
        the expanded variable
        See Also:
        expand(Object)

      • query

        public void query​(String sql,
                  Closure closure)
           throws SQLException
        Performs the given SQL query, which should return a single ResultSet object. The given closure is called with the ResultSet as its argument.

        Example usages: 

         sql.query("select * from PERSON where firstname like 'S%'") { ResultSet rs ->
     while (rs.next()) println rs.getString('firstname') + ' ' + rs.getString(3)
 }

 sql.query("call get_people_places()") { ResultSet rs ->
     while (rs.next()) println rs.toRowResult().firstname
 }

        All resources including the ResultSet are closed automatically after the closure is called.

        Parameters:
        sql - the sql statement
        closure - called for each row with a ResultSet
        Throws:
        SQLException - if a database access error occurs

      • query

        public void query​(String sql,
                  List<Object> params,
                  Closure closure)
           throws SQLException
        Performs the given SQL query, which should return a single ResultSet object. The given closure is called with the ResultSet as its argument. The query may contain placeholder question marks which match the given list of parameters.

        Example usage: 

         sql.query('select * from PERSON where lastname like ?', ['%a%']) { ResultSet rs ->
     while (rs.next()) println rs.getString('lastname')
 }

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        All resources including the ResultSet are closed automatically after the closure is called.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        closure - called for each row with a ResultSet
        Throws:
        SQLException - if a database access error occurs

      • query

        public void query​(GString gstring,
                  Closure closure)
           throws SQLException
        Performs the given SQL query, which should return a single ResultSet object. The given closure is called with the ResultSet as its argument. The query may contain GString expressions.

        Example usage: 

         def location = 25
 sql.query "select * from PERSON where location_id < $location", { ResultSet rs ->
     while (rs.next()) println rs.getString('firstname')
 }

        All resources including the ResultSet are closed automatically after the closure is called.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        closure - called for each row with a ResultSet
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • eachRow

        public void eachRow​(String sql,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given Closure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values.

        Example usages: 

         sql.eachRow("select * from PERSON where firstname like 'S%'") { row ->
    println "$row.firstname ${row[2]}}"
 }

 sql.eachRow "call my_stored_proc_returning_resultset()", {
     println it.firstname
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    int offset,
                    int maxRows,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given closure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    Closure metaClosure,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given rowClosure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument.

        Example usage: 

         def printColNames = { meta ->
     (1..meta.columnCount).each {
         print meta.getColumnLabel(it).padRight(20)
     }
     println()
 }
 def printRow = { row ->
     row.toRowResult().values().each{ print it.toString().padRight(20) }
     println()
 }
 sql.eachRow("select * from PERSON", printColNames, printRow)

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    Closure metaClosure,
                    int offset,
                    int maxRows,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given rowClosure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values.

        In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    List<Object> params,
                    Closure metaClosure,
                    int offset,
                    int maxRows,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given rowClosure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values.

        In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain placeholder question marks which match the given list of parameters.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    Map map,
                    Closure metaClosure,
                    int offset,
                    int maxRows,
                    Closure rowClosure)
             throws SQLException
        A variant of eachRow(String, java.util.List, groovy.lang.Closure, int, int, groovy.lang.Closure) allowing the named parameters to be supplied in a map.
        Parameters:
        sql - the sql statement
        map - a map containing the named parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • eachRow

        public void eachRow​(Map map,
                    String sql,
                    Closure metaClosure,
                    int offset,
                    int maxRows,
                    Closure rowClosure)
             throws SQLException
        A variant of eachRow(String, java.util.List, groovy.lang.Closure, int, int, groovy.lang.Closure) allowing the named parameters to be supplied as named arguments.
        Parameters:
        map - a map containing the named parameters
        sql - the sql statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • eachRow

        public void eachRow​(String sql,
                    List<Object> params,
                    Closure metaClosure,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given Closure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain placeholder question marks which match the given list of parameters.

        Example usage: 

         def printColNames = { meta ->
     (1..meta.columnCount).each {
         print meta.getColumnLabel(it).padRight(20)
     }
     println()
 }
 def printRow = { row ->
     row.toRowResult().values().each{ print it.toString().padRight(20) }
     println()
 }
 sql.eachRow("select * from PERSON where lastname like ?", ['%a%'], printColNames, printRow)

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    List<Object> params,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given Closure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. The query may contain placeholder question marks which match the given list of parameters.

        Example usage: 

         sql.eachRow("select * from PERSON where lastname like ?", ['%a%']) { row ->
     println "${row[1]} $row.lastname"
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    List<Object> params,
                    int offset,
                    int maxRows,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given closure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. The query may contain placeholder question marks which match the given list of parameters.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(String sql,
                    Map params,
                    int offset,
                    int maxRows,
                    Closure closure)
             throws SQLException
        A variant of eachRow(String, java.util.List, int, int, groovy.lang.Closure) useful when providing the named parameters as a map.
        Parameters:
        sql - the sql statement
        params - a map of named parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • eachRow

        public void eachRow​(Map params,
                    String sql,
                    int offset,
                    int maxRows,
                    Closure closure)
             throws SQLException
        A variant of eachRow(String, java.util.List, int, int, groovy.lang.Closure) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map of named parameters
        sql - the sql statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • eachRow

        public void eachRow​(GString gstring,
                    Closure metaClosure,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given Closure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values.

        In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain GString expressions.

        Example usage: 

         def location = 25
 def printColNames = { meta ->
     (1..meta.columnCount).each {
         print meta.getColumnLabel(it).padRight(20)
     }
     println()
 }
 def printRow = { row ->
     row.toRowResult().values().each{ print it.toString().padRight(20) }
     println()
 }
 sql.eachRow("select * from PERSON where location_id < $location", printColNames, printRow)

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        metaClosure - called for meta data (only once after sql execution)
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • eachRow

        public void eachRow​(GString gstring,
                    Closure metaClosure,
                    int offset,
                    int maxRows,
                    Closure rowClosure)
             throws SQLException
        Performs the given SQL query calling the given closure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain GString expressions.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        metaClosure - called for meta data (only once after sql execution)
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        rowClosure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(GString gstring,
                    int offset,
                    int maxRows,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given closure with each row of the result set starting at the provided offset, and including up to maxRows number of rows. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. The query may contain GString expressions.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs

      • eachRow

        public void eachRow​(GString gstring,
                    Closure closure)
             throws SQLException
        Performs the given SQL query calling the given Closure with each row of the result set. The row will be a GroovyResultSet which is a ResultSet that supports accessing the fields using property style notation and ordinal index values. The query may contain GString expressions.

        Example usage: 

         def location = 25
 sql.eachRow("select * from PERSON where location_id < $location") { row ->
     println row.firstname
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • rows

        public List<GroovyRowResult> rows​(String sql)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set.

        Example usage: 

         def ans = sql.rows("select * from PERSON where firstname like 'S%'")
 println "Found ${ans.size()} rows"

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument.

        Example usage: 

         def printNumCols = { meta -> println "Found $meta.columnCount columns" }
 def ans = sql.rows("select * from PERSON", printNumCols)
 println "Found ${ans.size()} rows"

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        metaClosure - called with meta data of the ResultSet
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  int offset,
                                  int maxRows,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  List<Object> params)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set. The query may contain placeholder question marks which match the given list of parameters.

        Example usage: 

         def ans = sql.rows("select * from PERSON where lastname like ?", ['%a%'])
 println "Found ${ans.size()} rows"

        This method supports named and named ordinal parameters by supplying such parameters in the params list. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  List<Object> params,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows. The query may contain placeholder question marks which match the given list of parameters.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        This method supports named and named ordinal parameters by supplying such parameters in the params list. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  Map params,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        A variant of rows(String, java.util.List, int, int) useful when providing the named parameters as a map.
        Parameters:
        sql - the SQL statement
        params - a map of named parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • rows

        public List<GroovyRowResult> rows​(Map params,
                                  String sql,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        A variant of rows(String, java.util.List, int, int) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map of named parameters
        sql - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  Object[] params)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set.

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        An Object array variant of rows(String, List).

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  Object[] params,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set.

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        An Object array variant of rows(String, List, int, int).

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  List<Object> params,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain placeholder question marks which match the given list of parameters.

        Example usage: 

         def printNumCols = { meta -> println "Found $meta.columnCount columns" }
 def ans = sql.rows("select * from PERSON where lastname like ?", ['%a%'], printNumCols)
 println "Found ${ans.size()} rows"

        This method supports named and named ordinal parameters by supplying such parameters in the params list. Here is an example: 

         def printNumCols = { meta -> println "Found $meta.columnCount columns" }

 def mapParam = [foo: 'Smith']
 def domainParam = new MyDomainClass(bar: 'John')
 def qry = 'select * from PERSON where lastname=?1.foo and firstname=?2.bar'
 def ans = sql.rows(qry, [mapParam, domainParam], printNumCols)
 println "Found ${ans.size()} rows"

 def qry2 = 'select * from PERSON where firstname=:first and lastname=:last'
 def ans2 = sql.rows(qry2, [[last:'Smith', first:'John']], printNumCols)
 println "Found ${ans2.size()} rows"
        See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  List<Object> params,
                                  int offset,
                                  int maxRows,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain placeholder question marks which match the given list of parameters.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        This method supports named and named ordinal parameters by supplying such parameters in the params list. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(String sql,
                                  Map params,
                                  int offset,
                                  int maxRows,
                                  Closure metaClosure)
                           throws SQLException
        A variant of rows(String, java.util.List, int, int, groovy.lang.Closure) useful when providing the named parameters as a map.
        Parameters:
        sql - the SQL statement
        params - a map of named parameters
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • rows

        public List<GroovyRowResult> rows​(Map params,
                                  String sql,
                                  int offset,
                                  int maxRows,
                                  Closure metaClosure)
                           throws SQLException
        A variant of rows(String, java.util.List, int, int, groovy.lang.Closure) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map of named parameters
        sql - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • rows

        public List<GroovyRowResult> rows​(GString sql,
                                  int offset,
                                  int maxRows)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows. The query may contain GString expressions.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • rows

        public List<GroovyRowResult> rows​(GString gstring)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set. The query may contain GString expressions.

        Example usage: 

         def location = 25
 def ans = sql.rows("select * from PERSON where location_id < $location")
 println "Found ${ans.size()} rows"

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • rows

        public List<GroovyRowResult> rows​(GString gstring,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return the rows of the result set. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain GString expressions.

        Example usage: 

         def location = 25
 def printNumCols = { meta -> println "Found $meta.columnCount columns" }
 def ans = sql.rows("select * from PERSON where location_id < $location", printNumCols)
 println "Found ${ans.size()} rows"

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        metaClosure - called with meta data of the ResultSet
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • rows

        public List<GroovyRowResult> rows​(GString gstring,
                                  int offset,
                                  int maxRows,
                                  Closure metaClosure)
                           throws SQLException
        Performs the given SQL query and return a "page" of rows from the result set. A page is defined as starting at a 1-based offset, and containing a maximum number of rows. In addition, the metaClosure will be called once passing in the ResultSetMetaData as argument. The query may contain GString expressions.

        Note that the underlying implementation is based on either invoking ResultSet.absolute(), or if the ResultSet type is ResultSet.TYPE_FORWARD_ONLY, the ResultSet.next() method is invoked equivalently. The first row of a ResultSet is 1, so passing in an offset of 1 or less has no effect on the initial positioning within the result set.

        Note that different database and JDBC driver implementations may work differently with respect to this method. Specifically, one should expect that ResultSet.TYPE_FORWARD_ONLY may be less efficient than a "scrollable" type.

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - the SQL statement
        offset - the 1-based offset for the first row to be processed
        maxRows - the maximum number of rows to be processed
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs

      • firstRow

        public GroovyRowResult firstRow​(String sql)
                         throws SQLException
        Performs the given SQL query and return the first row of the result set.

        Example usage: 

         def ans = sql.firstRow("select * from PERSON where firstname like 'S%'")
 println ans.firstname

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        Returns:
        a GroovyRowResult object or null if no row is found
        Throws:
        SQLException - if a database access error occurs

      • firstRow

        public GroovyRowResult firstRow​(GString gstring)
                         throws SQLException
        Performs the given SQL query and return the first row of the result set. The query may contain GString expressions.

        Example usage: 

         def location = 25
 def ans = sql.firstRow("select * from PERSON where location_id < $location")
 println ans.firstname

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        a GroovyRowResult object or null if no row is found
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • firstRow

        public GroovyRowResult firstRow​(String sql,
                                List<Object> params)
                         throws SQLException
        Performs the given SQL query and return the first row of the result set. The query may contain placeholder question marks which match the given list of parameters.

        Example usages: 

         def ans = sql.firstRow("select * from PERSON where lastname like ?", ['%a%'])
 println ans.firstname
        If your database returns scalar functions as ResultSets, you can also use firstRow to gain access to stored procedure results, e.g. using hsqldb 1.9 RC4: 
         sql.execute """
     create function FullName(p_firstname VARCHAR(40)) returns VARCHAR(80)
     BEGIN atomic
     DECLARE ans VARCHAR(80);
     SET ans = (SELECT firstname || ' ' || lastname FROM PERSON WHERE firstname = p_firstname);
     RETURN ans;
     END
 """

 assert sql.firstRow("{call FullName(?)}", ['Sam'])[0] == 'Sam Pullara'

        This method supports named and named ordinal parameters by supplying such parameters in the params list. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        Returns:
        a GroovyRowResult object or null if no row is found
        Throws:
        SQLException - if a database access error occurs

      • firstRow

        public GroovyRowResult firstRow​(Map params,
                                String sql)
                         throws SQLException
        A variant of firstRow(String, java.util.List) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map containing the named parameters
        sql - the SQL statement
        Returns:
        a GroovyRowResult object or null if no row is found
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • firstRow

        public GroovyRowResult firstRow​(String sql,
                                Object[] params)
                         throws SQLException
        Performs the given SQL query and return the first row of the result set.

        An Object array variant of firstRow(String, List).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        Returns:
        a GroovyRowResult object or null if no row is found
        Throws:
        SQLException - if a database access error occurs

      • execute

        public boolean execute​(String sql)
                throws SQLException
        Executes the given piece of SQL. Also saves the updateCount, if any, for subsequent examination.

        Example usages: 

         sql.execute "DROP TABLE IF EXISTS person"

 sql.execute """
     CREATE TABLE person (
         id INTEGER NOT NULL,
         firstname VARCHAR(100),
         lastname VARCHAR(100),
         location_id INTEGER
     )
 """

 sql.execute """
     INSERT INTO person (id, firstname, lastname, location_id) VALUES (4, 'Paul', 'King', 40)
 """
 assert sql.updateCount == 1

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL to execute
        Returns:
        true if the first result is a ResultSet object; false if it is an update count or there are no results
        Throws:
        SQLException - if a database access error occurs

      • execute

        public void execute​(String sql,
                    Closure processResults)
             throws SQLException
        Executes the given piece of SQL. Also calls the provided processResults Closure to process any ResultSet or UpdateCount results that executing the SQL might produce.

        Example usages: 

         boolean first = true
 sql.execute "{call FindAllByFirst('J')}", { isResultSet, result ->
   if (first) {
     first = false
     assert !isResultSet && result == 0
   } else {
     assert isResultSet && result == [[ID:1, FIRSTNAME:'James', LASTNAME:'Strachan'], [ID:4, FIRSTNAME:'Jean', LASTNAME:'Gabin']]
   }
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL to execute
        processResults - a Closure which will be passed two parameters: either true plus a list of GroovyRowResult values derived from statement.getResultSet() or false plus the update count from statement.getUpdateCount(). The closure will be called for each result produced from executing the SQL.
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2

      • execute

        public boolean execute​(String sql,
                       List<Object> params)
                throws SQLException
        Executes the given piece of SQL with parameters. Also saves the updateCount, if any, for subsequent examination.

        Example usage: 

         sql.execute """
     insert into PERSON (id, firstname, lastname, location_id) values (?, ?, ?, ?)
 """, [1, "Guillaume", "Laforge", 10]
 assert sql.updateCount == 1

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        Returns:
        true if the first result is a ResultSet object; false if it is an update count or there are no results
        Throws:
        SQLException - if a database access error occurs

      • execute

        public void execute​(String sql,
                    List<Object> params,
                    Closure processResults)
             throws SQLException
        Executes the given piece of SQL with parameters. Also calls the provided processResults Closure to process any ResultSet or UpdateCount results that executing the SQL might produce.

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        processResults - a Closure which will be passed two parameters: either true plus a list of GroovyRowResult values derived from statement.getResultSet() or false plus the update count from statement.getUpdateCount(). The closure will be called for each result produced from executing the SQL.
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        execute(String, Closure)

      • execute

        public boolean execute​(Map params,
                       String sql)
                throws SQLException
        A variant of execute(String, java.util.List) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map containing the named parameters
        sql - the SQL statement
        Returns:
        true if the first result is a ResultSet object; false if it is an update count or there are no results
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • execute

        public void execute​(Map params,
                    String sql,
                    Closure processResults)
             throws SQLException
        A variant of execute(String, java.util.List, Closure) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map containing the named parameters
        sql - the SQL statement
        processResults - a Closure which will be passed two parameters: either true plus a list of GroovyRowResult values derived from statement.getResultSet() or false plus the update count from statement.getUpdateCount(). The closure will be called for each result produced from executing the SQL.
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2

      • execute

        public boolean execute​(String sql,
                       Object[] params)
                throws SQLException
        Executes the given piece of SQL with parameters.

        An Object array variant of execute(String, List).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        Returns:
        true if the first result is a ResultSet object; false if it is an update count or there are no results
        Throws:
        SQLException - if a database access error occurs

      • execute

        public void execute​(String sql,
                    Object[] params,
                    Closure processResults)
             throws SQLException
        Executes the given piece of SQL with parameters.

        An Object array variant of execute(String, List, Closure).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        processResults - a Closure which will be passed two parameters: either true plus a list of GroovyRowResult values derived from statement.getResultSet() or false plus the update count from statement.getUpdateCount(). The closure will be called for each result produced from executing the SQL.
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        execute(String, List, Closure)

      • execute

        public boolean execute​(GString gstring)
                throws SQLException
        Executes the given SQL with embedded expressions inside. Also saves the updateCount, if any, for subsequent examination.

        Example usage: 

         def scott = [firstname: "Scott", lastname: "Davis", id: 5, location_id: 50]
 sql.execute """
     insert into PERSON (id, firstname, lastname, location_id) values ($scott.id, $scott.firstname, $scott.lastname, $scott.location_id)
 """
 assert sql.updateCount == 1

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        true if the first result is a ResultSet object; false if it is an update count or there are no results
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • execute

        public void execute​(GString gstring,
                    Closure processResults)
             throws SQLException
        Executes the given SQL with embedded expressions inside. Also calls the provided processResults Closure to process any ResultSet or UpdateCount results that executing the SQL might produce. Resource handling is performed automatically where appropriate.
        Parameters:
        gstring - a GString containing the SQL query with embedded params
        processResults - a Closure which will be passed two parameters: either true plus a list of GroovyRowResult values derived from statement.getResultSet() or false plus the update count from statement.getUpdateCount(). The closure will be called for each result produced from executing the SQL.
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        expand(Object), execute(String, List, Closure)

      • executeInsert

        public List<List<Object>> executeInsert​(String sql)
                                 throws SQLException
        Executes the given SQL statement (typically an INSERT statement). Use this variant when you want to receive the values of any auto-generated columns, such as an autoincrement ID field. See executeInsert(GString) for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - The SQL statement to execute
        Returns:
        A list of the auto-generated column values for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs

      • executeInsert

        public List<List<Object>> executeInsert​(String sql,
                                        List<Object> params)
                                 throws SQLException
        Executes the given SQL statement (typically an INSERT statement). Use this variant when you want to receive the values of any auto-generated columns, such as an autoincrement ID field. The query may contain placeholder question marks which match the given list of parameters. See executeInsert(GString) for more details.

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - The SQL statement to execute
        params - The parameter values that will be substituted into the SQL statement's parameter slots
        Returns:
        A list of the auto-generated column values for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs

      • executeInsert

        public List<GroovyRowResult> executeInsert​(String sql,
                                           List<Object> params,
                                           List<String> keyColumnNames)
                                    throws SQLException
        Executes the given SQL statement (typically an INSERT statement). Use this variant when you want to receive the values of any auto-generated columns, such as an autoincrement ID field (or fields) and you know the column name(s) of the ID field(s). The query may contain placeholder question marks which match the given list of parameters. See executeInsert(GString) for more details.

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - The SQL statement to execute
        params - The parameter values that will be substituted into the SQL statement's parameter slots
        keyColumnNames - a list of column names indicating the columns that should be returned from the inserted row or rows (some drivers may be case sensitive, e.g. may require uppercase names)
        Returns:
        A list of the auto-generated row results for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        Connection.prepareStatement(String, String[])

      • executeInsert

        public List<List<Object>> executeInsert​(Map params,
                                        String sql)
                                 throws SQLException
        A variant of executeInsert(String, java.util.List) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map containing the named parameters
        sql - The SQL statement to execute
        Returns:
        A list of the auto-generated column values for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • executeInsert

        public List<GroovyRowResult> executeInsert​(Map params,
                                           String sql,
                                           List<String> keyColumnNames)
                                    throws SQLException
        A variant of executeInsert(String, List, List) useful when providing the named parameters as named arguments. This variant allows you to receive the values of any auto-generated columns, such as an autoincrement ID field (or fields) when you know the column name(s) of the ID field(s).
        Parameters:
        params - a map containing the named parameters
        sql - The SQL statement to execute
        keyColumnNames - a list of column names indicating the columns that should be returned from the inserted row or rows (some drivers may be case sensitive, e.g. may require uppercase names)
        Returns:
        A list of the auto-generated row results for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        Connection.prepareStatement(String, String[])

      • executeInsert

        public List<List<Object>> executeInsert​(String sql,
                                        Object[] params)
                                 throws SQLException
        Executes the given SQL statement (typically an INSERT statement).

        An Object array variant of executeInsert(String, List).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - The SQL statement to execute
        params - The parameter values that will be substituted into the SQL statement's parameter slots
        Returns:
        A list of the auto-generated column values for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs

      • executeInsert

        public List<GroovyRowResult> executeInsert​(String sql,
                                           String[] keyColumnNames)
                                    throws SQLException
        Executes the given SQL statement (typically an INSERT statement). This variant allows you to receive the values of any auto-generated columns, such as an autoincrement ID field (or fields) when you know the column name(s) of the ID field(s).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - The SQL statement to execute
        keyColumnNames - an array of column names indicating the columns that should be returned from the inserted row or rows (some drivers may be case sensitive, e.g. may require uppercase names)
        Returns:
        A list of the auto-generated row results for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2

      • executeInsert

        public List<GroovyRowResult> executeInsert​(String sql,
                                           String[] keyColumnNames,
                                           Object[] params)
                                    throws SQLException
        Executes the given SQL statement (typically an INSERT statement). This variant allows you to receive the values of any auto-generated columns, such as an autoincrement ID field (or fields) when you know the column name(s) of the ID field(s).

        An array variant of executeInsert(String, List, List).

        This method supports named and named ordinal parameters by supplying such parameters in the params array. See the class Javadoc for more details.

        Parameters:
        sql - The SQL statement to execute
        keyColumnNames - an array of column names indicating the columns that should be returned from the inserted row or rows (some drivers may be case sensitive, e.g. may require uppercase names)
        params - The parameter values that will be substituted into the SQL statement's parameter slots
        Returns:
        A list of the auto-generated row results for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2

      • executeInsert

        public List<List<Object>> executeInsert​(GString gstring)
                                 throws SQLException
        Executes the given SQL statement (typically an INSERT statement). Use this variant when you want to receive the values of any auto-generated columns, such as an autoincrement ID field. The query may contain GString expressions.

        Generated key values can be accessed using array notation. For example, to return the second auto-generated column value of the third row, use keys[3][1]. The method is designed to be used with SQL INSERT statements, but is not limited to them.

        The standard use for this method is when a table has an autoincrement ID column and you want to know what the ID is for a newly inserted row. In this example, we insert a single row into a table in which the first column contains the autoincrement ID: 

         def sql = Sql.newInstance("jdbc:mysql://localhost:3306/groovy",
                           "user",
                           "password",
                           "com.mysql.jdbc.Driver")

 def keys = sql.executeInsert("insert into test_table (INT_DATA, STRING_DATA) "
                       + "VALUES (1, 'Key Largo')")

 def id = keys[0][0]

 // 'id' now contains the value of the new row's ID column.
 // It can be used to update an object representation's
 // id attribute for example.
 ...

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        A list of the auto-generated column values for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • executeInsert

        public List<GroovyRowResult> executeInsert​(GString gstring,
                                           List<String> keyColumnNames)
                                    throws SQLException
        Executes the given SQL statement (typically an INSERT statement). Use this variant when you want to receive the values of any auto-generated columns, such as an autoincrement ID field (or fields) and you know the column name(s) of the ID field(s).

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        keyColumnNames - a list of column names indicating the columns that should be returned from the inserted row or rows (some drivers may be case sensitive, e.g. may require uppercase names)
        Returns:
        A list of the auto-generated row results for each inserted row (typically auto-generated keys)
        Throws:
        SQLException - if a database access error occurs
        Since:
        2.3.2
        See Also:
        Connection.prepareStatement(String, String[]), expand(Object)

      • executeUpdate

        public int executeUpdate​(String sql)
                  throws SQLException
        Executes the given SQL update.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL to execute
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs

      • executeUpdate

        public int executeUpdate​(String sql,
                         List<Object> params)
                  throws SQLException
        Executes the given SQL update with parameters.

        This method supports named and named ordinal parameters. See the class Javadoc for more details.

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs

      • executeUpdate

        public int executeUpdate​(Map params,
                         String sql)
                  throws SQLException
        A variant of executeUpdate(String, java.util.List) useful when providing the named parameters as named arguments.
        Parameters:
        params - a map containing the named parameters
        sql - the SQL statement
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        Since:
        1.8.7

      • executeUpdate

        public int executeUpdate​(String sql,
                         Object[] params)
                  throws SQLException
        Executes the given SQL update with parameters.

        An Object array variant of executeUpdate(String, List).

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs

      • executeUpdate

        public int executeUpdate​(GString gstring)
                  throws SQLException
        Executes the given SQL update with embedded expressions inside.

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        See Also:
        expand(Object)

      • call

        public int call​(String sql)
         throws Exception
        Performs a stored procedure call.

        Example usage (tested with MySQL) - suppose we have the following stored procedure: 

         sql.execute """
     CREATE PROCEDURE HouseSwap(_first1 VARCHAR(50), _first2 VARCHAR(50))
     BEGIN
         DECLARE _loc1 INT;
         DECLARE _loc2 INT;
         SELECT location_id into _loc1 FROM PERSON where firstname = _first1;
         SELECT location_id into _loc2 FROM PERSON where firstname = _first2;
         UPDATE PERSON
         set location_id = case firstname
             when _first1 then _loc2
             when _first2 then _loc1
         end
         where (firstname = _first1 OR firstname = _first2);
     END
 """
        then you can invoke the procedure as follows: 
         def rowsChanged = sql.call("{call HouseSwap('Guillaume', 'Paul')}")
 assert rowsChanged == 2
        Parameters:
        sql - the SQL statement
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        Exception

      • call

        public int call​(GString gstring)
         throws Exception
        Performs a stored procedure call with the given embedded parameters.

        Example usage - see call(String) for more details about creating a HouseSwap(IN name1, IN name2) stored procedure. Once created, it can be called like this: 

         def p1 = 'Paul'
 def p2 = 'Guillaume'
 def rowsChanged = sql.call("{call HouseSwap($p1, $p2)}")
 assert rowsChanged == 2

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        Exception
        See Also:
        expand(Object), call(String)

      • call

        public int call​(String sql,
                List<Object> params)
         throws Exception
        Performs a stored procedure call with the given parameters.

        Example usage - see call(String) for more details about creating a HouseSwap(IN name1, IN name2) stored procedure. Once created, it can be called like this: 

         def rowsChanged = sql.call("{call HouseSwap(?, ?)}", ['Guillaume', 'Paul'])
 assert rowsChanged == 2

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the SQL statement
        params - a list of parameters
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        Exception
        See Also:
        call(String)

      • call

        public int call​(String sql,
                Object[] params)
         throws Exception
        Performs a stored procedure call with the given parameters.

        An Object array variant of call(String, List).

        Parameters:
        sql - the SQL statement
        params - an array of parameters
        Returns:
        the number of rows updated or 0 for SQL statements that return nothing
        Throws:
        SQLException - if a database access error occurs
        Exception
        See Also:
        call(String)

      • call

        public void call​(String sql,
                 List<Object> params,
                 Closure closure)
          throws Exception
        Performs a stored procedure call with the given parameters. The closure is called once with all the out parameters.

        Example usage - suppose we create a stored procedure (ignore its simplistic implementation): 

         // Tested with MySql 5.0.75
 sql.execute """
     CREATE PROCEDURE Hemisphere(
         IN p_firstname VARCHAR(50),
         IN p_lastname VARCHAR(50),
         OUT ans VARCHAR(50))
     BEGIN
     DECLARE loc INT;
     SELECT location_id into loc FROM PERSON where firstname = p_firstname and lastname = p_lastname;
     CASE loc
         WHEN 40 THEN
             SET ans = 'Southern Hemisphere';
         ELSE
             SET ans = 'Northern Hemisphere';
     END CASE;
     END;
 """
        we can now call the stored procedure as follows: 
         sql.call '{call Hemisphere(?, ?, ?)}', ['Guillaume', 'Laforge', Sql.VARCHAR], { dwells ->
     println dwells
 }
        which will output 'Northern Hemisphere'.

        We can also access stored functions with scalar return values where the return value will be treated as an OUT parameter. Here are examples for various databases for creating such a procedure: 

         // Tested with MySql 5.0.75
 sql.execute """
     create function FullName(p_firstname VARCHAR(40)) returns VARCHAR(80)
     begin
         declare ans VARCHAR(80);
         SELECT CONCAT(firstname, ' ', lastname) INTO ans FROM PERSON WHERE firstname = p_firstname;
         return ans;
     end
 """

 // Tested with MS SQLServer Express 2008
 sql.execute """
     create function FullName(@firstname VARCHAR(40)) returns VARCHAR(80)
     begin
         declare @ans VARCHAR(80)
         SET @ans = (SELECT firstname + ' ' + lastname FROM PERSON WHERE firstname = @firstname)
         return @ans
     end
 """

 // Tested with Oracle XE 10g
 sql.execute """
     create function FullName(p_firstname VARCHAR) return VARCHAR is
     ans VARCHAR(80);
     begin
         SELECT CONCAT(CONCAT(firstname, ' '), lastname) INTO ans FROM PERSON WHERE firstname = p_firstname;
         return ans;
     end;
 """
        and here is how you access the stored function for all databases: 
         sql.call("{? = call FullName(?)}", [Sql.VARCHAR, 'Sam']) { name ->
     assert name == 'Sam Pullara'
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Exception

      • call

        public void call​(GString gstring,
                 Closure closure)
          throws Exception
        Performs a stored procedure call with the given parameters, calling the closure once with all result objects.

        See call(String, List, Closure) for more details about creating a Hemisphere(IN first, IN last, OUT dwells) stored procedure. Once created, it can be called like this: 

         def first = 'Scott'
 def last = 'Davis'
 sql.call "{call Hemisphere($first, $last, ${Sql.VARCHAR})}", { dwells ->
     println dwells
 }

        As another example, see call(String, List, Closure) for more details about creating a FullName(IN first) stored function. Once created, it can be called like this: 

         def first = 'Sam'
 sql.call("{$Sql.VARCHAR = call FullName($first)}") { name ->
     assert name == 'Sam Pullara'
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        closure - called for each row with a GroovyResultSet
        Throws:
        SQLException - if a database access error occurs
        Exception
        See Also:
        call(String, List, Closure), expand(Object)

      • callWithRows

        public List<GroovyRowResult> callWithRows​(GString gstring,
                                          Closure closure)
                                   throws SQLException
        Performs a stored procedure call with the given parameters, calling the closure once with all result objects, and also returning the rows of the ResultSet.

        Use this when calling a stored procedure that utilizes both output parameters and returns a single ResultSet.

        Once created, the stored procedure can be called like this: 

         def first = 'Jeff'
 def last = 'Sheets'
 def rows = sql.callWithRows "{call Hemisphere2($first, $last, ${Sql.VARCHAR})}", { dwells ->
     println dwells
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        closure - called once with all out parameter results
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        callWithRows(String, List, Closure)

      • callWithRows

        public List<GroovyRowResult> callWithRows​(String sql,
                                          List<Object> params,
                                          Closure closure)
                                   throws SQLException
        Performs a stored procedure call with the given parameters, calling the closure once with all result objects, and also returning the rows of the ResultSet.

        Use this when calling a stored procedure that utilizes both output parameters and returns a single ResultSet.

        Once created, the stored procedure can be called like this: 

         def rows = sql.callWithRows '{call Hemisphere2(?, ?, ?)}', ['Guillaume', 'Laforge', Sql.VARCHAR], { dwells ->
     println dwells
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        closure - called once with all out parameter results
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        callWithRows(GString, Closure)

      • callWithAllRows

        public List<List<GroovyRowResult>> callWithAllRows​(GString gstring,
                                                   Closure closure)
                                            throws SQLException
        Performs a stored procedure call with the given parameters, calling the closure once with all result objects, and also returning a list of lists with the rows of the ResultSet(s).

        Use this when calling a stored procedure that utilizes both output parameters and returns multiple ResultSets.

        Once created, the stored procedure can be called like this: 

         def first = 'Jeff'
 def last = 'Sheets'
 def rowsList = sql.callWithAllRows "{call Hemisphere2($first, $last, ${Sql.VARCHAR})}", { dwells ->
     println dwells
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        gstring - a GString containing the SQL query with embedded params
        closure - called once with all out parameter results
        Returns:
        a list containing lists of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        callWithAllRows(String, List, Closure)

      • callWithAllRows

        public List<List<GroovyRowResult>> callWithAllRows​(String sql,
                                                   List<Object> params,
                                                   Closure closure)
                                            throws SQLException
        Performs a stored procedure call with the given parameters, calling the closure once with all result objects, and also returning a list of lists with the rows of the ResultSet(s).

        Use this when calling a stored procedure that utilizes both output parameters and returns multiple ResultSets.

        Once created, the stored procedure can be called like this: 

         def rowsList = sql.callWithAllRows '{call Hemisphere2(?, ?, ?)}', ['Guillaume', 'Laforge', Sql.VARCHAR], { dwells ->
     println dwells
 }

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        closure - called once with all out parameter results
        Returns:
        a list containing lists of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        callWithRows(GString, Closure)

      • close

        public void close()
        If this SQL object was created with a Connection then this method closes the connection. If this SQL object was created from a DataSource then this method only frees any cached objects (statements in particular).
        Specified by:
        close in interface AutoCloseable

      • getDataSource

        public DataSource getDataSource()

      • commit

        public void commit()
            throws SQLException
        If this SQL object was created with a Connection then this method commits the connection. If this SQL object was created from a DataSource then this method does nothing.
        Throws:
        SQLException - if a database access error occurs

      • rollback

        public void rollback()
              throws SQLException
        If this SQL object was created with a Connection then this method rolls back the connection. If this SQL object was created from a DataSource then this method does nothing.
        Throws:
        SQLException - if a database access error occurs

      • getUpdateCount

        public int getUpdateCount()
        Returns:
        Returns the updateCount.

      • getConnection

        public Connection getConnection()
        If this instance was created with a single Connection then the connection is returned. Otherwise if this instance was created with a DataSource then this method returns null
        Returns:
        the connection wired into this object, or null if this object uses a DataSource

      • withStatement

        public void withStatement​(Closure configureStatement)
        Allows a closure to be passed in to configure the JDBC statements before they are executed. It can be used to do things like set the query size etc. When this method is invoked, the supplied closure is saved. Statements subsequently created from other methods will then be configured using this closure. The statement being configured is passed into the closure as its single argument, e.g.: 
         sql.withStatement{ stmt -> stmt.maxRows = 10 }
 def firstTenRows = sql.rows("select * from table")
        Parameters:
        configureStatement - the closure

      • setCacheStatements

        public void setCacheStatements​(boolean cacheStatements)
        Enables statement caching.
        if cacheStatements is true, cache is created and all created prepared statements will be cached. if cacheStatements is false, all cached statements will be properly closed.
        Parameters:
        cacheStatements - the new value

      • isCacheStatements

        public boolean isCacheStatements()
        Returns:
        boolean true if cache is enabled (default is false)

      • cacheConnection

        public void cacheConnection​(Closure closure)
                     throws SQLException
        Caches the connection used while the closure is active. If the closure takes a single argument, it will be called with the connection, otherwise it will be called with no arguments.
        Parameters:
        closure - the given closure
        Throws:
        SQLException - if a database error occurs

      • withTransaction

        public void withTransaction​(Closure closure)
                     throws SQLException
        Performs the closure within a transaction using a cached connection. If the closure takes a single argument, it will be called with the connection, otherwise it will be called with no arguments.
        Parameters:
        closure - the given closure
        Throws:
        SQLException - if a database error occurs

      • isWithinBatch

        public boolean isWithinBatch()
        Returns true if the current Sql object is currently executing a withBatch method call.
        Returns:
        true if a withBatch call is currently being executed.

      • withBatch

        public int[] withBatch​(Closure closure)
                throws SQLException
        Performs the closure (containing batch operations) within a batch. Uses a batch size of zero, i.e. no automatic partitioning of batches.

        This means that executeBatch() will be called automatically after the withBatch closure has finished but may be called explicitly if desired as well for more fine-grained partitioning of the batch.

        The closure will be called with a single argument; the database statement (actually a BatchingStatementWrapper helper object) associated with this batch.

        Use it like this: 

         def updateCounts = sql.withBatch { stmt ->
     stmt.addBatch("insert into TABLENAME ...")
     stmt.addBatch("insert into TABLENAME ...")
     stmt.addBatch("insert into TABLENAME ...")
     ...
 }
        For integrity and performance reasons, you may wish to consider executing your batch command(s) within a transaction: 
         sql.withTransaction {
     def result1 = sql.withBatch { ... }
     ...
 }
        Parameters:
        closure - the closure containing batch and optionally other statements
        Returns:
        an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
        Throws:
        SQLException - if a database access error occurs, or this method is called on a closed Statement, or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
        See Also:
        withBatch(int, Closure)

      • withBatch

        public int[] withBatch​(int batchSize,
                       Closure closure)
                throws SQLException
        Performs the closure (containing batch operations) within a batch using a given batch size.

        After every batchSize addBatch(sqlBatchOperation) operations, automatically calls an executeBatch() operation to "chunk" up the database operations into partitions. Though not normally needed, you can also explicitly call executeBatch() which after executing the current batch, resets the batch count back to zero.

        The closure will be called with a single argument; the database statement (actually a BatchingStatementWrapper helper object) associated with this batch.

        Use it like this for batchSize of 20: 

         def updateCounts = sql.withBatch(20) { stmt ->
     stmt.addBatch("insert into TABLENAME ...")
     stmt.addBatch("insert into TABLENAME ...")
     stmt.addBatch("insert into TABLENAME ...")
     ...
 }
        For integrity and performance reasons, you may wish to consider executing your batch command(s) within a transaction: 
         sql.withTransaction {
     def result1 = sql.withBatch { ... }
     ...
 }
        Parameters:
        batchSize - partition the batch into batchSize pieces, i.e. after batchSize addBatch() invocations, call executeBatch() automatically; 0 means manual calls to executeBatch are required
        closure - the closure containing batch and optionally other statements
        Returns:
        an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
        Throws:
        SQLException - if a database access error occurs, or this method is called on a closed Statement, or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
        See Also:
        withBatch(Closure), BatchingStatementWrapper, Statement

      • withBatch

        public int[] withBatch​(String sql,
                       Closure closure)
                throws SQLException
        Performs the closure (containing batch operations specific to an associated prepared statement) within a batch. Uses a batch size of zero, i.e. no automatic partitioning of batches.

        This means that executeBatch() will be called automatically after the withBatch closure has finished but may be called explicitly if desired as well for more fine-grained partitioning of the batch.

        The closure will be called with a single argument; the prepared statement (actually a BatchingPreparedStatementWrapper helper object) associated with this batch.

        An example: 

         def updateCounts = sql.withBatch('insert into TABLENAME(a, b, c) values (?, ?, ?)') { ps ->
     ps.addBatch([10, 12, 5])
     ps.addBatch([7, 3, 98])
     ps.addBatch(22, 67, 11)
     def partialUpdateCounts = ps.executeBatch() // optional interim batching
     ps.addBatch(30, 40, 50)
     ...
 }
        For integrity and performance reasons, you may wish to consider executing your batch command(s) within a transaction: 
         sql.withTransaction {
     def result1 = sql.withBatch { ... }
     ...
 }
        Parameters:
        sql - batch update statement
        closure - the closure containing batch statements (to bind parameters) and optionally other statements
        Returns:
        an array of update counts containing one element for each binding in the batch. The elements of the array are ordered according to the order in which commands were executed.
        Throws:
        SQLException - if a database access error occurs, or this method is called on a closed Statement, or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
        See Also:
        withBatch(int, String, Closure), BatchingPreparedStatementWrapper, PreparedStatement

      • withBatch

        public int[] withBatch​(int batchSize,
                       String sql,
                       Closure closure)
                throws SQLException
        Performs the closure (containing batch operations specific to an associated prepared statement) within a batch using a given batch size.

        After every batchSize addBatch(params) operations, automatically calls an executeBatch() operation to "chunk" up the database operations into partitions. Though not normally needed, you can also explicitly call executeBatch() which after executing the current batch, resets the batch count back to zero.

        The closure will be called with a single argument; the prepared statement (actually a BatchingPreparedStatementWrapper helper object) associated with this batch.

        Below is an example using a batchSize of 20: 

         def updateCounts = sql.withBatch(20, 'insert into TABLENAME(a, b, c) values (?, ?, ?)') { ps ->
     ps.addBatch(10, 12, 5)      // varargs style
     ps.addBatch([7, 3, 98])     // list
     ps.addBatch([22, 67, 11])
     ...
 }
        Named parameters (into maps or domain objects) are also supported: 
         def updateCounts = sql.withBatch(20, 'insert into TABLENAME(a, b, c) values (:foo, :bar, :baz)') { ps ->
     ps.addBatch([foo:10, bar:12, baz:5])  // map
     ps.addBatch(foo:7, bar:3, baz:98)     // Groovy named args allow outer brackets to be dropped
     ...
 }
        Named ordinal parameters (into maps or domain objects) are also supported: 
         def updateCounts = sql.withBatch(20, 'insert into TABLENAME(a, b, c) values (?1.foo, ?2.bar, ?2.baz)') { ps ->
     ps.addBatch([[foo:22], [bar:67, baz:11]])  // list of maps or domain objects
     ps.addBatch([foo:10], [bar:12, baz:5])     // varargs allows outer brackets to be dropped
     ps.addBatch([foo:7], [bar:3, baz:98])
     ...
 }
 // swap to batch size of 5 and illustrate simple and domain object cases ...
 class Person { String first, last }
 def updateCounts2 = sql.withBatch(5, 'insert into PERSON(id, first, last) values (?1, ?2.first, ?2.last)') { ps ->
     ps.addBatch(1, new Person(first:'Peter', last:'Pan'))
     ps.addBatch(2, new Person(first:'Snow', last:'White'))
     ...
 }
        For integrity and performance reasons, you may wish to consider executing your batch command(s) within a transaction: 
         sql.withTransaction {
     def result1 = sql.withBatch { ... }
     ...
 }
        Parameters:
        batchSize - partition the batch into batchSize pieces, i.e. after batchSize addBatch() invocations, call executeBatch() automatically; 0 means manual calls to executeBatch are required if additional partitioning of the batch is required
        sql - batch update statement
        closure - the closure containing batch statements (to bind parameters) and optionally other statements
        Returns:
        an array of update counts containing one element for each binding in the batch. The elements of the array are ordered according to the order in which commands were executed.
        Throws:
        SQLException - if a database access error occurs, or this method is called on a closed Statement, or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
        See Also:
        BatchingPreparedStatementWrapper, PreparedStatement

      • cacheStatements

        public void cacheStatements​(Closure closure)
                     throws SQLException
        Caches every created preparedStatement in Closure closure Every cached preparedStatement is closed after closure has been called. If the closure takes a single argument, it will be called with the connection, otherwise it will be called with no arguments.
        Parameters:
        closure - the given closure
        Throws:
        SQLException - if a database error occurs
        See Also:
        setCacheStatements(boolean)

      • callWithRows

        protected List<List<GroovyRowResult>> callWithRows​(String sql,
                                                   List<Object> params,
                                                   int processResultsSets,
                                                   Closure closure)
                                            throws SQLException
        Base internal method for call(), callWithRows(), and callWithAllRows() style of methods.

        Performs a stored procedure call with the given parameters, calling the closure once with all result objects, and also returning the rows of the ResultSet(s) (if processResultSets is set to Sql.FIRST_RESULT_SET, Sql.ALL_RESULT_SETS)

        Main purpose of processResultSets param is to retain original call() method performance when this is set to Sql.NO_RESULT_SETS

        Resource handling is performed automatically where appropriate.

        Parameters:
        sql - the sql statement
        params - a list of parameters
        processResultsSets - the result sets to process, either Sql.NO_RESULT_SETS, Sql.FIRST_RESULT_SET, or Sql.ALL_RESULT_SETS
        closure - called once with all out parameter results
        Returns:
        a list of GroovyRowResult objects
        Throws:
        SQLException - if a database access error occurs
        See Also:
        callWithRows(String, List, Closure)

      • executeQuery

        protected final ResultSet executeQuery​(String sql)
                                throws SQLException
        Useful helper method which handles resource management when executing a query which returns a result set. Derived classes of Sql can override "createQueryCommand" and then call this method to access the ResultSet returned from the provided query or alternatively can use the higher-level method of Sql which return result sets which are funnelled through this method, e.g. eachRow, query.
        Parameters:
        sql - query to execute
        Returns:
        the resulting ResultSet
        Throws:
        SQLException - if a database error occurs

      • executePreparedQuery

        protected final ResultSet executePreparedQuery​(String sql,
                                               List<Object> params)
                                        throws SQLException
        Useful helper method which handles resource management when executing a prepared query which returns a result set. Derived classes of Sql can override "createPreparedQueryCommand" and then call this method to access the ResultSet returned from the provided query.
        Parameters:
        sql - query to execute
        params - parameters matching question mark placeholders in the query
        Returns:
        the resulting ResultSet
        Throws:
        SQLException - if a database error occurs

      • asList

        protected List<GroovyRowResult> asList​(String sql,
                                       ResultSet rs)
                                throws SQLException
        Hook to allow derived classes to override list of result collection behavior. The default behavior is to return a list of GroovyRowResult objects corresponding to each row in the ResultSet.
        Parameters:
        sql - query to execute
        rs - the ResultSet to process
        Returns:
        the resulting list of rows
        Throws:
        SQLException - if a database error occurs

      • asList

        protected List<GroovyRowResult> asList​(String sql,
                                       ResultSet rs,
                                       Closure metaClosure)
                                throws SQLException
        Hook to allow derived classes to override list of result collection behavior. The default behavior is to return a list of GroovyRowResult objects corresponding to each row in the ResultSet.
        Parameters:
        sql - query to execute
        rs - the ResultSet to process
        metaClosure - called for meta data (only once after sql execution)
        Returns:
        the resulting list of rows
        Throws:
        SQLException - if a database error occurs

      • asSql

        protected String asSql​(GString gstring,
                       List<Object> values)
        Hook to allow derived classes to override sql generation from GStrings.
        Parameters:
        gstring - a GString containing the SQL query with embedded params
        values - the values to embed
        Returns:
        the SQL version of the given query using ? instead of any parameter
        See Also:
        expand(Object)

      • nullify

        protected String nullify​(String sql)
        Hook to allow derived classes to override null handling. Default behavior is to replace ?'"? references with NULLish
        Parameters:
        sql - the SQL statement
        Returns:
        the modified SQL String

      • findWhereKeyword

        protected int findWhereKeyword​(String sql)
        Hook to allow derived classes to override where clause sniffing. Default behavior is to find the first 'where' keyword in the sql doing simple avoidance of the word 'where' within quotes.
        Parameters:
        sql - the SQL statement
        Returns:
        the index of the found keyword or -1 if not found

      • getParameters

        protected List<Object> getParameters​(GString gstring)
        Hook to allow derived classes to override behavior associated with extracting params from a GString.
        Parameters:
        gstring - a GString containing the SQL query with embedded params
        Returns:
        extracts the parameters from the expression as a List
        See Also:
        expand(Object)

      • setParameters

        protected void setParameters​(List<Object> params,
                             PreparedStatement statement)
                      throws SQLException
        Hook to allow derived classes to override behavior associated with setting params for a prepared statement. Default behavior is to append the parameters to the given statement using setObject.
        Parameters:
        params - the parameters to append
        statement - the statement
        Throws:
        SQLException - if a database access error occurs

      • setObject

        protected void setObject​(PreparedStatement statement,
                         int i,
                         Object value)
                  throws SQLException
        Strategy method allowing derived classes to handle types differently such as for CLOBs etc.
        Parameters:
        statement - the statement of interest
        i - the index of the object of interest
        value - the new object value
        Throws:
        SQLException - if a database access error occurs

      • createConnection

        protected Connection createConnection()
                               throws SQLException
        An extension point allowing derived classes to change the behavior of connection creation. The default behavior is to either use the supplied connection or obtain it from the supplied datasource.
        Returns:
        the connection associated with this Sql
        Throws:
        SQLException - if a SQL error occurs

      • closeResources

        protected void closeResources​(Connection connection,
                              Statement statement,
                              ResultSet results)
        An extension point allowing derived classes to change the behavior of resource closing.
        Parameters:
        connection - the connection to close
        statement - the statement to close
        results - the results to close

      • closeResources

        protected void closeResources​(Connection connection,
                              Statement statement)
        An extension point allowing the behavior of resource closing to be overridden in derived classes.
        Parameters:
        connection - the connection to close
        statement - the statement to close

      • closeResources

        protected void closeResources​(Connection connection)
        An extension point allowing the behavior of resource closing to be overridden in derived classes.
        Parameters:
        connection - the connection to close

      • configure

        protected void configure​(Statement statement)
        Provides a hook for derived classes to be able to configure JDBC statements. Default behavior is to call a previously saved closure, if any, using the statement as a parameter.
        Parameters:
        statement - the statement to configure

      • buildSqlWithIndexedProps

        protected SqlWithParams buildSqlWithIndexedProps​(String sql)
        Hook to allow derived classes to override behavior associated with the parsing and indexing of parameters from a given sql statement.
        Parameters:
        sql - the sql statement to process
        Returns:
        a SqlWithParams instance containing the parsed sql and parameters containing the indexed location and property name of parameters or null if no parsing of the sql was performed.

      • isCacheNamedQueries

        public boolean isCacheNamedQueries()
        Returns:
        boolean true if caching is enabled (the default is true)

      • setCacheNamedQueries

        public void setCacheNamedQueries​(boolean cacheNamedQueries)
        Enables named query caching.
        if cacheNamedQueries is true, cache is created and processed named queries will be cached. if cacheNamedQueries is false, no caching will occur saving memory at the cost of additional processing time.
        Parameters:
        cacheNamedQueries - the new value

      • isEnableNamedQueries

        public boolean isEnableNamedQueries()
        Returns:
        boolean true if named query processing is enabled (the default is true)

      • setEnableNamedQueries

        public void setEnableNamedQueries​(boolean enableNamedQueries)
        Enables named query support:
        • if enableNamedQueries is true, queries with ':propname' and '?1.propname' style placeholders will be processed.
        • if enableNamedQueries is false, this feature will be turned off.
        Parameters:
        enableNamedQueries - the new value

      • createQueryCommand

        protected Sql.AbstractQueryCommand createQueryCommand​(String sql)
        Factory for the QueryCommand command pattern object allows subclasses to supply implementations of the command class. The factory will be used in a pattern similar to: 
         AbstractQueryCommand q = createQueryCommand("update TABLE set count = 0) where count is null");
 try {
     ResultSet rs = q.execute();
     return asList(rs);
 } finally {
     q.closeResources();
 }
        Parameters:
        sql - statement to be executed
        Returns:
        a command - invoke its execute() and closeResource() methods

      • createPreparedQueryCommand

        protected Sql.AbstractQueryCommand createPreparedQueryCommand​(String sql,
                                                              List<Object> queryParams)
        Factory for the PreparedQueryCommand command pattern object allows subclass to supply implementations of the command class.
        Parameters:
        sql - statement to be executed, including optional parameter placeholders (?)
        queryParams - List of parameter values corresponding to parameter placeholders
        Returns:
        a command - invoke its execute() and closeResource() methods
        See Also:
        createQueryCommand(String)

      • setInternalConnection

        protected void setInternalConnection​(Connection conn)
        Stub needed for testing. Called when a connection is opened by one of the command-pattern classes so that a test case can monitor the state of the connection through its subclass.
        Parameters:
        conn - the connection that is about to be used by a command