com.gargoylesoftware.base.resource.jdbc
Class StatementWrapper

java.lang.Object
  com.gargoylesoftware.base.resource.jdbc.StatementWrapper

All Implemented Interfaces:

Statement

Direct Known Subclasses:

PreparedStatementWrapper

public class StatementWrapper

extends Object

implements Statement

The object used for executing a static SQL statement and obtaining the results produced by it.

Only one ResultSet object per Statement object can be open at any point in time. Therefore, if the reading of one ResultSet object is interleaved with the reading of another, each must have been generated by different Statement objects. All statement execute methods implicitly close a statment's current ResultSet object if an open one exists.

Version:

$Revision: 1.5 $

Author:

Mike Bowler

Field Summary

Fields inherited from interface java.sql.Statement

CLOSE_ALL_RESULTS, CLOSE_CURRENT_RESULT, EXECUTE_FAILED, KEEP_CURRENT_RESULT, NO_GENERATED_KEYS, RETURN_GENERATED_KEYS, SUCCESS_NO_INFO

Constructor Summary

StatementWrapper(Statement statement)
Create a new wrapper

Method Summary

void	addBatch(String sql) Adds an SQL command to the current batch of commmands for this Statement object.
void	cancel() Cancels this Statement object if both the DBMS and driver support aborting an SQL statement.
protected void	checkIsOpen() Check to see if the connection is still open
void	clearBatch() Makes the set of commands in the current batch empty.
void	clearWarnings() Clears all the warnings reported on this Statement object.
void	close() Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.
boolean	execute(String sql) Executes an SQL statement that may return multiple results.
boolean	execute(String sql, int autoGeneratedKeys) Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval.
boolean	execute(String sql, int[] columnIndexes) Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
boolean	execute(String sql, String[] columnNames) Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
int[]	executeBatch() Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.
ResultSet	executeQuery(String sql) Executes an SQL statement that returns a single ResultSet object.
int	executeUpdate(String sql) Executes an SQL INSERT, UPDATE or DELETE statement.
int	executeUpdate(String sql, int autoGeneratedKeys) Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval.
int	executeUpdate(String sql, int[] columnIndexes) Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
int	executeUpdate(String sql, String[] columnNames) Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
Connection	getConnection() Returns the Connection object that produced this Statement object.
Statement	getDelegate() Return the statement that is wrapped
int	getFetchDirection() Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object.
int	getFetchSize() Retrieves the number of result set rows that is the default fetch size for result sets generated from this Statement object.
ResultSet	getGeneratedKeys() Retrieves any auto-generated keys created as a result of executing this Statement object.
int	getMaxFieldSize() Returns the maximum number of bytes allowed for any column value.
int	getMaxRows() Retrieves the maximum number of rows that a ResultSet object can contain.
boolean	getMoreResults() Moves to a Statement object's next result.
boolean	getMoreResults(int current) Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.
int	getQueryTimeout() Retrieves the number of seconds the driver will wait for a Statement object to execute.
ResultSet	getResultSet() Returns the current result as a ResultSet object.
int	getResultSetConcurrency() Retrieves the result set concurrency for ResultSet objects generated by this Statement object.
int	getResultSetHoldability() Retrieves the result set holdability for ResultSet objects generated by this Statement object.
int	getResultSetType() Retrieves the result set type for ResultSet objects generated by this Statement object.
int	getUpdateCount() Returns the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned.
SQLWarning	getWarnings() Retrieves the first warning reported by calls on this Statement object.
boolean	isClosed() Return true if this statement has been closed
void	setConnection(Connection connection) Set the connection that created this statement
void	setCursorName(String name) Defines the SQL cursor name that will be used by subsequent Statement object execute methods.
void	setEscapeProcessing(boolean enable) Sets escape processing on or off.
void	setFetchDirection(int direction) Gives the driver a hint as to the direction in which the rows in a result set will be processed.
void	setFetchSize(int rows) Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed.
void	setMaxFieldSize(int max) Sets the limit for the maximum number of bytes in a column to the given number of bytes.
void	setMaxRows(int max) Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number.
void	setQueryTimeout(int seconds) Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds.
protected ResultSet	wrapResultSet(ResultSet resultSet) Wrap the specified result set in a ResultSetWrapper object and return the wrapper.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StatementWrapper

public StatementWrapper(Statement statement)

Create a new wrapper

Parameters:

statement - The statement that we are wrapping

Method Detail

setConnection

public final void setConnection(Connection connection)

Set the connection that created this statement

Parameters:

connection - The connection

setMaxFieldSize

public final void setMaxFieldSize(int max)
                           throws SQLException

Sets the limit for the maximum number of bytes in a column to the given number of bytes. This is the maximum number of bytes that can be returned for any column value. This limit applies only to BINARY , VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.

Specified by:

setMaxFieldSize in interface Statement

Parameters:

max - the new max column size limit; zero means unlimited

Throws:

SQLException - if a database access error occurs

setMaxRows

public final void setMaxRows(int max)
                      throws SQLException

Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.

Specified by:

setMaxRows in interface Statement

Parameters:

max - the new max rows limit; zero means unlimited

Throws:

SQLException - if a database access error occurs

setEscapeProcessing

public final void setEscapeProcessing(boolean enable)
                               throws SQLException

Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL to the database. Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for prepared statements will have no effect.

Specified by:

setEscapeProcessing in interface Statement

Parameters:

enable - true to enable; false to disable

Throws:

SQLException - if a database access error occurs

setQueryTimeout

public final void setQueryTimeout(int seconds)
                           throws SQLException

Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds. If the limit is exceeded, an SQLException is thrown.

Specified by:

setQueryTimeout in interface Statement

Parameters:

seconds - the new query timeout limit in seconds; zero means unlimited

Throws:

SQLException - if a database access error occurs

setCursorName

public final void setCursorName(String name)
                         throws SQLException

Defines the SQL cursor name that will be used by subsequent Statement object execute methods. This name can then be used in SQL positioned update/delete statements to identify the current row in the ResultSet object generated by this statement. If the database doesn't support positioned update/delete, this method is a noop. To insure that a cursor has the proper isolation level to support updates, the cursor's SELECT statement should be of the form 'select for update ...'. If the 'for update' phrase is omitted, positioned updates may fail.

Note: By definition, positioned update/delete execution must be done by a different Statement object than the one which generated the ResultSet object being used for positioning. Also, cursor names must be unique within a connection.

Specified by:

setCursorName in interface Statement

Parameters:

name - the new cursor name, which must be unique within a connection

Throws:

SQLException - if a database access error occurs

setFetchDirection

public final void setFetchDirection(int direction)
                             throws SQLException

Gives the driver a hint as to the direction in which the rows in a result set will be processed. The hint applies only to result sets created using this Statement object. The default value is ResultSet.FETCH_FORWARD.

Note that this method sets the default fetch direction for result sets generated by this Statement object. Each result set has its own methods for getting and setting its own fetch direction.

Specified by:

setFetchDirection in interface Statement

Parameters:

direction - the initial direction for processing rows

Throws:

SQLException - if a database access error occurs or the given direction is not one of ResultSet.FETCH_FORWARD, ResultSet.FETCH_REVERSE , or ResultSet.FETCH_UNKNOWN

Since:

1.2

setFetchSize

public final void setFetchSize(int rows)
                        throws SQLException

Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. The number of rows specified affects only result sets created using this statement. If the value specified is zero, then the hint is ignored. The default value is zero.

Specified by:

setFetchSize in interface Statement

Parameters:

rows - the number of rows to fetch

Throws:

SQLException - if a database access error occurs, or the condition 0 <= rows <= this.getMaxRows() is not satisfied.

Since:

1.2

getDelegate

public final Statement getDelegate()

Return the statement that is wrapped

Returns:

The wrapped statement

isClosed

public final boolean isClosed()

Return true if this statement has been closed

Returns:

true if this statement has been closed

getMaxFieldSize

public final int getMaxFieldSize()
                          throws SQLException

Returns the maximum number of bytes allowed for any column value. This limit is the maximum number of bytes that can be returned for any column value. The limit applies only to BINARY, VARBINARY , LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR columns. If the limit is exceeded, the excess data is silently discarded.

Specified by:

getMaxFieldSize in interface Statement

Returns:

the current max column size limit; zero means unlimited

Throws:

SQLException - if a database access error occurs

getMaxRows

public final int getMaxRows()
                     throws SQLException

Retrieves the maximum number of rows that a ResultSet object can contain. If the limit is exceeded, the excess rows are silently dropped.

Specified by:

getMaxRows in interface Statement

Returns:

the current max row limit; zero means unlimited

Throws:

SQLException - if a database access error occurs

getQueryTimeout

public final int getQueryTimeout()
                          throws SQLException

Retrieves the number of seconds the driver will wait for a Statement object to execute. If the limit is exceeded, a SQLException is thrown.

Specified by:

getQueryTimeout in interface Statement

Returns:

the current query timeout limit in seconds; zero means unlimited

Throws:

SQLException - if a database access error occurs

getWarnings

public final SQLWarning getWarnings()
                             throws SQLException

Retrieves the first warning reported by calls on this Statement object. Subsequent Statement object warnings will be chained to this SQLWarning object.

The warning chain is automatically cleared each time a statement is (re)executed.

Note: If you are processing a ResultSet object, any warnings associated with reads on that ResultSet object will be chained on it.

Specified by:

getWarnings in interface Statement

Returns:

the first SQLWarning object or null

Throws:

SQLException - if a database access error occurs

getResultSet

public final ResultSet getResultSet()
                             throws SQLException

Returns the current result as a ResultSet object. This method should be called only once per result.

Specified by:

getResultSet in interface Statement

Returns:

the current result as a ResultSet object; null if the result is an update count or there are no more results

Throws:

SQLException - if a database access error occurs

getUpdateCount

public final int getUpdateCount()
                         throws SQLException

Returns the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned. This method should be called only once per result.

Specified by:

getUpdateCount in interface Statement

Returns:

the current result as an update count; -1 if the current result is a ResultSet object or there are no more results

Throws:

SQLException - if a database access error occurs

getMoreResults

public final boolean getMoreResults()
                             throws SQLException

Moves to a Statement object's next result. It returns true if this result is a ResultSet object. This method also implicitly closes any current ResultSet object obtained with the method getResultSet.

There are no more results when the following is true:

      (!getMoreResults() && (getUpdateCount() == -1) 

Specified by:

getMoreResults in interface Statement

Returns:

true if the next result is a ResultSet object; false if it is an update count or there are no more results

Throws:

SQLException - if a database access error occurs

getFetchDirection

public final int getFetchDirection()
                            throws SQLException

Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object. If this Statement object has not set a fetch direction by calling the method setFetchDirection, the return value is implementation-specific.

Specified by:

getFetchDirection in interface Statement

Returns:

the default fetch direction for result sets generated from this Statement object

Throws:

SQLException - if a database access error occurs

Since:

1.2

getFetchSize

public final int getFetchSize()
                       throws SQLException

Retrieves the number of result set rows that is the default fetch size for result sets generated from this Statement object. If this Statement object has not set a fetch size by calling the method setFetchSize, the return value is implementation-specific.

Specified by:

getFetchSize in interface Statement

Returns:

the default fetch size for result sets generated from this Statement object

Throws:

SQLException - if a database access error occurs

Since:

1.2

getResultSetConcurrency

public final int getResultSetConcurrency()
                                  throws SQLException

Retrieves the result set concurrency for ResultSet objects generated by this Statement object.

Specified by:

getResultSetConcurrency in interface Statement

Returns:

either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE

Throws:

SQLException - If an error occurs

Since:

1.2

getResultSetType

public final int getResultSetType()
                           throws SQLException

Retrieves the result set type for ResultSet objects generated by this Statement object.

Specified by:

getResultSetType in interface Statement

Returns:

one of ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE , or ResultSet.TYPE_SCROLL_SENSITIVE

Throws:

SQLException - If an error occurs

Since:

1.2

getConnection

public final Connection getConnection()
                               throws SQLException

Returns the Connection object that produced this Statement object.

Specified by:

getConnection in interface Statement

Returns:

the connection that produced this statement

Throws:

SQLException - if a database access error occurs

Since:

1.2

executeQuery

public final ResultSet executeQuery(String sql)
                             throws SQLException

Executes an SQL statement that returns a single ResultSet object.

Specified by:

executeQuery in interface Statement

Parameters:

sql - typically this is a static SQL SELECT statement

Returns:

a ResultSet object that contains the data produced by the given query; never null

Throws:

SQLException - if a database access error occurs

executeUpdate

public final int executeUpdate(String sql)
                        throws SQLException

Executes an SQL INSERT, UPDATE or DELETE statement. In addition, SQL statements that return nothing, such as SQL DDL statements, can be executed.

Specified by:

executeUpdate in interface Statement

Parameters:

sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing

Returns:

either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs

close

public final void close()
                 throws SQLException

Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed. It is generally good practice to release resources as soon as you are finished with them to avoid tying up database resources.

Note: A Statement object is automatically closed when it is garbage collected. When a Statement object is closed, its current ResultSet object, if one exists, is also closed.

Specified by:

close in interface Statement

Throws:

SQLException - if a database access error occurs

cancel

public final void cancel()
                  throws SQLException

Cancels this Statement object if both the DBMS and driver support aborting an SQL statement. This method can be used by one thread to cancel a statement that is being executed by another thread.

Specified by:

cancel in interface Statement

Throws:

SQLException - if a database access error occurs

clearWarnings

public final void clearWarnings()
                         throws SQLException

Clears all the warnings reported on this Statement object. After a call to this method, the method getWarnings will return null until a new warning is reported for this Statement object.

Specified by:

clearWarnings in interface Statement

Throws:

SQLException - if a database access error occurs

execute

public final boolean execute(String sql)
                      throws SQLException

Executes an SQL statement that may return multiple results. Under some (uncommon) situations a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string. The methods execute, getMoreResults, getResultSet , and getUpdateCount let you navigate through multiple results. The execute method executes an SQL statement and indicates the form of the first result. You can then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

Specified by:

execute in interface Statement

Parameters:

sql - any SQL statement

Returns:

true if the next result is a ResultSet object; false if it is an update count or there are no more results

Throws:

SQLException - if a database access error occurs

addBatch

public final void addBatch(String sql)
                    throws SQLException

Adds an SQL command to the current batch of commmands for this Statement object. This method is optional.

Specified by:

addBatch in interface Statement

Parameters:

sql - typically this is a static SQL INSERT or UPDATE statement

Throws:

SQLException - if a database access error occurs, or the driver does not support batch statements

Since:

1.2

clearBatch

public final void clearBatch()
                      throws SQLException

Makes the set of commands in the current batch empty. This method is optional.

Specified by:

clearBatch in interface Statement

Throws:

SQLException - if a database access error occurs or the driver does not support batch statements

Since:

1.2

executeBatch

public final int[] executeBatch()
                         throws SQLException

Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. The int elements of the array that is returned are ordered to correspond to the commands in the batch, which are ordered according to the order in which they were added to the batch. The elements in the array returned by the method executeBatch may be one of the following:

1. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution
2. A value of -2 -- indicates that the command was processed successfully but that the number of rows affected is unknown

   If one of the commands in a batch update fails to execute properly, this method throws a BatchUpdateException, and a JDBC driver may or may not continue to process the remaining commands in the batch. However, the driver's behavior must be consistent with a particular DBMS, either always continuing to process commands or never continuing to process commands. If the driver continues processing after a failure, the array returned by the method BatchUpdateException.getUpdateCounts will contain as many elements as there are commands in the batch, and at least one of the elements will be the following:

3. A value of -3 -- indicates that the command failed to execute successfully and occurs only if a driver continues to process commands after a command fails

A driver is not required to implement this method. The possible implementations and return values have been modified in the Java 2 SDK, Standard Edition, version 1.3 to accommodate the option of continuing to proccess commands in a batch update after a BatchUpdateException object has been thrown.

Specified by:

executeBatch in interface Statement

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 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.

Since:

1.3

checkIsOpen

protected final void checkIsOpen()
                          throws SQLException

Check to see if the connection is still open

Throws:

SQLException - If an error occurs

wrapResultSet

protected final ResultSet wrapResultSet(ResultSet resultSet)

Wrap the specified result set in a ResultSetWrapper object and return the wrapper.

Parameters:

resultSet - The object to be wrapped

Returns:

The wrapper.

getMoreResults

public boolean getMoreResults(int current)
                       throws SQLException

Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.

There are no more results when the following is true:

      (!getMoreResults() && (getUpdateCount() == -1)
 

Specified by:

getMoreResults in interface Statement

Parameters:

current - one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSetCLOSE_CURRENT_RESULT, KEEP_CURRENT_RESULT, or CLOSE_ALL_RESULTS

Returns:

true if the next result is a ResultSet object; false if it is an update count or there are no more results

Throws:

SQLException - if a database access error occurs

Since:

1.4

getGeneratedKeys

public ResultSet getGeneratedKeys()
                           throws SQLException

Retrieves any auto-generated keys created as a result of executing this Statement object. If this Statement object did not generate any keys, an empty ResultSet object is returned.

Specified by:

getGeneratedKeys in interface Statement

Returns:

a ResultSet object containing the auto-generated key(s) generated by the execution of this Statement object

Throws:

SQLException - if a database access error occurs

Since:

java 1.4

executeUpdate

public int executeUpdate(String sql,
                         int autoGeneratedKeys)
                  throws SQLException

Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval.

Specified by:

executeUpdate in interface Statement

Parameters:

sql - must be an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing

autoGeneratedKeys - a flag indicating whether auto-generated keys should be made available for retrieval; one of the following constants: Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS

Returns:

either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, the given SQL statement returns a ResultSet object, or the given constant is not one of those allowed

Since:

java 1.4

executeUpdate

public int executeUpdate(String sql,
                         int[] columnIndexes)
                  throws SQLException

Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

Specified by:

executeUpdate in interface Statement

Parameters:

sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement

columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row

Returns:

either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs or the SQL statement returns a ResultSet object

Since:

java 1.4

executeUpdate

public int executeUpdate(String sql,
                         String[] columnNames)
                  throws SQLException

Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

Specified by:

executeUpdate in interface Statement

Parameters:

sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing

columnNames - an array of the names of the columns that should be returned from the inserted row

Returns:

either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs

Since:

java 1.4

execute

public boolean execute(String sql,
                       int autoGeneratedKeys)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL statement is not an INSERT statement.

In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

Specified by:

execute in interface Statement

Parameters:

sql - any SQL statement

autoGeneratedKeys - a constant indicating whether auto-generated keys should be made available for retrieval using the method getGeneratedKeys; one of the following constants: Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS

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:

java 1.4

execute

public boolean execute(String sql,
                       int[] columnIndexes)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

Under some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

Specified by:

execute in interface Statement

Parameters:

sql - any SQL statement

columnIndexes - an array of the indexes of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys

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:

java 1.4

execute

public boolean execute(String sql,
                       String[] columnNames)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

Specified by:

execute in interface Statement

Parameters:

sql - any SQL statement

columnNames - an array of the names of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys

Returns:

true if the next result is a ResultSet object; false if it is an update count or there are no more results

Throws:

SQLException - if a database access error occurs

Since:

java 1.4

getResultSetHoldability

public int getResultSetHoldability()
                            throws SQLException

Retrieves the result set holdability for ResultSet objects generated by this Statement object.

Specified by:

getResultSetHoldability in interface Statement

Returns:

either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT

Throws:

SQLException - if a database access error occurs

Since:

java 1.4