org.firebirdsql.jdbc
Class AbstractStatement

java.lang.Object
  org.firebirdsql.jdbc.AbstractStatement

All Implemented Interfaces:

java.sql.Statement, java.sql.Wrapper, FirebirdStatement, Synchronizable

Direct Known Subclasses:

AbstractPreparedStatement, FBStatement

public abstract class AbstractStatement
extends java.lang.Object
implements FirebirdStatement, Synchronizable

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 statement's current ResultSet object if an open one exists.

Author:

David Jencks

See Also:

Connection.createStatement(), ResultSet

Nested Class Summary

protected static class

AbstractStatement.StatementResult The current result of a statement.

Field Summary

protected boolean	completed
protected AbstractConnection	connection
protected AbstractStatement.StatementResult	currentStatementResult
protected int	fetchSize
protected java.sql.SQLWarning	firstWarning
protected org.firebirdsql.gds.impl.AbstractIscStmtHandle	fixedStmt
protected org.firebirdsql.gds.impl.GDSHelper	gdsHelper
protected int	maxRows
protected FBObjectListener.StatementListener	statementListener

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

protected

AbstractStatement(org.firebirdsql.gds.impl.GDSHelper c, int rsType, int rsConcurrency, int rsHoldability, FBObjectListener.StatementListener statementListener)

Method Summary

void	addBatch(java.lang.String sql) Adds an SQL command to the current batch of commmands for this Statement object.
protected void	addWarning(java.sql.SQLWarning warning)
void	cancel() Cancels this Statement object if both the DBMS and driver support aborting an SQL statement.
protected void	checkValidity() Check if this statement is valid.
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.
void	closeOnCompletion()
void	completeStatement()
void	completeStatement(CompletionReason reason)
boolean	equals(java.lang.Object other)
boolean	execute(java.lang.String sql) Executes an SQL statement that may return multiple results.
boolean	execute(java.lang.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(java.lang.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(java.lang.String sql, java.lang.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.
java.sql.ResultSet	executeQuery(java.lang.String sql) Executes an SQL statement that returns a single ResultSet object.
int	executeUpdate(java.lang.String sql) Executes an SQL INSERT, UPDATE or DELETE statement.
int	executeUpdate(java.lang.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(java.lang.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(java.lang.String sql, java.lang.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.
protected void	finalize()
void	forgetResultSet()
java.sql.Connection	getConnection() Returns the Connection object that produced this Statement object.
java.sql.ResultSet	getCurrentResultSet() Get current result set.
int	getDeletedRowsCount() Get number of deleted rows.
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.
java.sql.ResultSet	getGeneratedKeys() Retrieves any auto-generated keys created as a result of executing this Statement object.
int	getInsertedRowsCount() Get number of inserted rows.
java.lang.String	getLastExecutionPlan() Get execution plan for the last executed statement.
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 mode)
int	getQueryTimeout() Retrieves the number of seconds the driver will wait for a Statement object to execute.
java.sql.ResultSet	getResultSet() Returns the current result as a ResultSet object.
java.sql.ResultSet	getResultSet(boolean metaDataQuery)
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.
java.lang.Object	getSynchronizationObject() Get synchronization 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.
protected int	getUpdateCountInternal() Gets the current update count, even when a result set is currently open.
int	getUpdatedRowsCount() Get number of updated rows.
java.sql.SQLWarning	getWarnings() Retrieves the first warning reported by calls on this Statement object.
int	hashCode()
boolean	hasOpenResultSet() Check if this statement has open result set.
protected boolean	internalExecute(java.lang.String sql)
boolean	isClosed() Check if this statement was closed.
boolean	isCloseOnCompletion()
protected boolean	isExecuteProcedureStatement(java.lang.String sql) This method checks if supplied statement is executing procedure or it is generic statement.
boolean	isPoolable()
boolean	isValid() Check if this statement is valid.
boolean	isWrapperFor(java.lang.Class<?> iface)
protected java.lang.String	nativeSQL(java.lang.String sql)
protected void	notifyStatementCompleted()
protected void	notifyStatementCompleted(boolean success)
protected void	notifyStatementStarted()
protected void	notifyStatementStarted(boolean closeResultSet)
protected void	prepareFixedStatement(java.lang.String sql, boolean describeBind)
void	setCursorName(java.lang.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	setPoolable(boolean poolable)
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 int[]	toArray(java.util.Collection<java.lang.Integer> list) Convert collection of Integer elements into array of int.
<T> T	unwrap(java.lang.Class<T> iface)

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

gdsHelper

protected org.firebirdsql.gds.impl.GDSHelper gdsHelper

statementListener

protected FBObjectListener.StatementListener statementListener

fixedStmt

protected org.firebirdsql.gds.impl.AbstractIscStmtHandle fixedStmt

completed

protected boolean completed

firstWarning

protected java.sql.SQLWarning firstWarning

currentStatementResult

protected AbstractStatement.StatementResult currentStatementResult

maxRows

protected int maxRows

fetchSize

protected int fetchSize

connection

protected AbstractConnection connection

Constructor Detail

AbstractStatement

protected AbstractStatement(org.firebirdsql.gds.impl.GDSHelper c,
                            int rsType,
                            int rsConcurrency,
                            int rsHoldability,
                            FBObjectListener.StatementListener statementListener)
                     throws java.sql.SQLException

Throws:

java.sql.SQLException

Method Detail

isValid

public boolean isValid()

Description copied from interface: FirebirdStatement

Check if this statement is valid.

Specified by:

isValid in interface FirebirdStatement

Returns:

true if statement is valid and can be used to execute SQL.

getSynchronizationObject

public final java.lang.Object getSynchronizationObject()

Description copied from interface: Synchronizable

Get synchronization object.

Specified by:

getSynchronizationObject in interface Synchronizable

Returns:

object, cannot be null.

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

completeStatement

public void completeStatement()
                       throws java.sql.SQLException

Throws:

java.sql.SQLException

completeStatement

public void completeStatement(CompletionReason reason)
                       throws java.sql.SQLException

Throws:

java.sql.SQLException

executeQuery

public java.sql.ResultSet executeQuery(java.lang.String sql)
                                throws java.sql.SQLException

Executes an SQL statement that returns a single ResultSet object.

Specified by:

executeQuery in interface java.sql.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:

java.sql.SQLException - if a database access error occurs

notifyStatementStarted

protected void notifyStatementStarted()
                               throws java.sql.SQLException

Throws:

java.sql.SQLException

notifyStatementStarted

protected void notifyStatementStarted(boolean closeResultSet)
                               throws java.sql.SQLException

Throws:

java.sql.SQLException

notifyStatementCompleted

protected void notifyStatementCompleted()
                                 throws java.sql.SQLException

Throws:

java.sql.SQLException

notifyStatementCompleted

protected void notifyStatementCompleted(boolean success)
                                 throws java.sql.SQLException

Throws:

java.sql.SQLException

executeUpdate

public int executeUpdate(java.lang.String sql)
                  throws java.sql.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 java.sql.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:

java.sql.SQLException - if a database access error occurs

executeUpdate

public int executeUpdate(java.lang.String sql,
                         int autoGeneratedKeys)
                  throws java.sql.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. The driver will ignore the flag if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Specified by:

executeUpdate in interface java.sql.Statement

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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 (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement returns a ResultSet object, or the given constant is not one of those allowed

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS

Since:

1.4

executeUpdate

public int executeUpdate(java.lang.String sql,
                         int[] columnIndexes)
                  throws java.sql.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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Specified by:

executeUpdate in interface java.sql.Statement

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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

Returns:

either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object, or the second argument supplied to this method is not an int array whose elements are valid column indexes

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

executeUpdate

public int executeUpdate(java.lang.String sql,
                         java.lang.String[] columnNames)
                  throws java.sql.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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Specified by:

executeUpdate in interface java.sql.Statement

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object, or the second argument supplied to this method is not a String array whose elements are valid column names

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

execute

public boolean execute(java.lang.String sql,
                       int autoGeneratedKeys)
                throws java.sql.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, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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 java.sql.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:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement or the second parameter supplied to this method is not Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS.

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS

Since:

1.4

See Also:

getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()

execute

public boolean execute(java.lang.String sql,
                       int[] columnIndexes)
                throws java.sql.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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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 java.sql.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:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement or the elements in the int array passed to this method are not valid column indexes

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

See Also:

getResultSet(), getUpdateCount(), getMoreResults()

execute

public boolean execute(java.lang.String sql,
                       java.lang.String[] columnNames)
                throws java.sql.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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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 java.sql.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:

java.sql.SQLException - if a database access error occurs, this method is called on a closed Statement or the elements of the String array passed to this method are not valid column names

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

See Also:

getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()

getGeneratedKeys

public java.sql.ResultSet getGeneratedKeys()
                                    throws java.sql.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.

Note:If the columns which represent the auto-generated keys were not specified, the JDBC driver implementation will determine the columns which best represent the auto-generated keys.

Specified by:

getGeneratedKeys in interface java.sql.Statement

Returns:

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

Throws:

java.sql.SQLException - if a database access error occurs or this method is called on a closed Statement

java.sql.SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

close

public void close()
           throws java.sql.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.

Calling the method close on a Statement object that is already closed has no effect.

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 java.sql.Statement

Throws:

java.sql.SQLException - if a database access error occurs

isClosed

public boolean isClosed()

Check if this statement was closed. This is quick workaround to avoid additional close() in our cleanup code.

Specified by:

isClosed in interface java.sql.Statement

Specified by:

isClosed in interface FirebirdStatement

Returns:

true if this statement was already closed.

getMaxFieldSize

public int getMaxFieldSize()
                    throws java.sql.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 java.sql.Statement

Returns:

the current max column size limit; zero means unlimited

Throws:

java.sql.SQLException - if a database access error occurs

setMaxFieldSize

public void setMaxFieldSize(int max)
                     throws java.sql.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 java.sql.Statement

Parameters:

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

Throws:

java.sql.SQLException - if a database access error occurs

getMaxRows

public int getMaxRows()
               throws java.sql.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 java.sql.Statement

Returns:

the current max row limit; zero means unlimited

Throws:

java.sql.SQLException - if a database access error occurs

setMaxRows

public void setMaxRows(int max)
                throws java.sql.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 java.sql.Statement

Parameters:

max - the new max rows limit; zero means unlimited

Throws:

java.sql.SQLException - if a database access error occurs

setEscapeProcessing

public void setEscapeProcessing(boolean enable)
                         throws java.sql.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 java.sql.Statement

Parameters:

enable - true to enable; false to disable

Throws:

java.sql.SQLException - if a database access error occurs

getQueryTimeout

public int getQueryTimeout()
                    throws java.sql.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 java.sql.Statement

Returns:

the current query timeout limit in seconds; zero means unlimited

Throws:

java.sql.SQLException - if a database access error occurs

setQueryTimeout

public void setQueryTimeout(int seconds)
                     throws java.sql.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 java.sql.Statement

Parameters:

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

Throws:

java.sql.SQLException - if a database access error occurs

cancel

public void cancel()
            throws java.sql.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 java.sql.Statement

Throws:

java.sql.SQLException - if a database access error occurs

getWarnings

public java.sql.SQLWarning getWarnings()
                                throws java.sql.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 java.sql.Statement

Returns:

the first SQLWarning object or null

Throws:

java.sql.SQLException - if a database access error occurs

clearWarnings

public void clearWarnings()
                   throws java.sql.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 java.sql.Statement

Throws:

java.sql.SQLException - if a database access error occurs

setCursorName

public void setCursorName(java.lang.String name)
                   throws java.sql.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 java.sql.Statement

Parameters:

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

Throws:

java.sql.SQLException - if a database access error occurs

execute

public boolean execute(java.lang.String sql)
                throws java.sql.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 java.sql.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:

java.sql.SQLException - if a database access error occurs

See Also:

getResultSet(), getUpdateCount(), getMoreResults()

getResultSet

public java.sql.ResultSet getResultSet()
                                throws java.sql.SQLException

Returns the current result as a ResultSet object. This method should be called only once per result. Calling this method twice with autocommit on and used will probably throw an inappropriate or uninformative exception.

Specified by:

getResultSet in interface java.sql.Statement

Returns:

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

Throws:

java.sql.SQLException - if a database access error occurs

See Also:

execute(java.lang.String, int)

getResultSet

public java.sql.ResultSet getResultSet(boolean metaDataQuery)
                                throws java.sql.SQLException

Throws:

java.sql.SQLException

hasOpenResultSet

public boolean hasOpenResultSet()

Description copied from interface: FirebirdStatement

Check if this statement has open result set. Note, this method works correctly if auto-commit is disabled. In auto-commit mode it will always return false because from the statement's point of view result set is not open (in auto-commit mode complete result set is fetched and cached in wrapping object before returning from the Statement.getResultSet() method).

Specified by:

hasOpenResultSet in interface FirebirdStatement

Returns:

true if there's already open result set associated with this statement, otherwise false.

getUpdateCount

public int getUpdateCount()
                   throws java.sql.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 java.sql.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:

java.sql.SQLException - if a database access error occurs

See Also:

execute(java.lang.String, int)

getUpdateCountInternal

protected int getUpdateCountInternal()
                              throws java.sql.SQLException

Gets the current update count, even when a result set is currently open.

Returns:

Update count.

Throws:

java.sql.SQLException

getDeletedRowsCount

public int getDeletedRowsCount()
                        throws java.sql.SQLException

Description copied from interface: FirebirdStatement

Get number of deleted rows. You can call this method multiple times, it does not affect the JDBC result number.

Specified by:

getDeletedRowsCount in interface FirebirdStatement

Returns:

number of deleted rows or -1 if current result is result set.

Throws:

java.sql.SQLException - if database error occurs.

getInsertedRowsCount

public int getInsertedRowsCount()
                         throws java.sql.SQLException

Description copied from interface: FirebirdStatement

Get number of inserted rows. You can call this method multiple times, it does not affect the JDBC result number.

Specified by:

getInsertedRowsCount in interface FirebirdStatement

Returns:

number of inserted rows or -1 if current result is result set.

Throws:

java.sql.SQLException - if database error occurs.

getUpdatedRowsCount

public int getUpdatedRowsCount()
                        throws java.sql.SQLException

Description copied from interface: FirebirdStatement

Get number of updated rows. You can call this method multiple times, it does not affect the JDBC result number.

Specified by:

getUpdatedRowsCount in interface FirebirdStatement

Returns:

number of updated rows or -1 if current result is result set.

Throws:

java.sql.SQLException - if database error occurs.

getMoreResults

public boolean getMoreResults()
                       throws java.sql.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 java.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:

java.sql.SQLException - if a database access error occurs

See Also:

execute(java.lang.String, int)

getMoreResults

public boolean getMoreResults(int mode)
                       throws java.sql.SQLException

Specified by:

getMoreResults in interface java.sql.Statement

Throws:

java.sql.SQLException

setFetchDirection

public void setFetchDirection(int direction)
                       throws java.sql.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 java.sql.Statement

Parameters:

direction - the initial direction for processing rows

Throws:

java.sql.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

See Also:

What Is in the JDBC 2.0 API

getFetchDirection

public int getFetchDirection()
                      throws java.sql.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 java.sql.Statement

Returns:

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

Throws:

java.sql.SQLException - if a database access error occurs

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

setFetchSize

public void setFetchSize(int rows)
                  throws java.sql.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 java.sql.Statement

Parameters:

rows - the number of rows to fetch

Throws:

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

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

getFetchSize

public int getFetchSize()
                 throws java.sql.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 java.sql.Statement

Returns:

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

Throws:

java.sql.SQLException - if a database access error occurs

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

getResultSetConcurrency

public int getResultSetConcurrency()
                            throws java.sql.SQLException

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

Specified by:

getResultSetConcurrency in interface java.sql.Statement

Returns:

either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE

Throws:

java.sql.SQLException

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

getResultSetType

public int getResultSetType()
                     throws java.sql.SQLException

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

Specified by:

getResultSetType in interface java.sql.Statement

Returns:

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

Throws:

java.sql.SQLException

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

getResultSetHoldability

public int getResultSetHoldability()
                            throws java.sql.SQLException

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

Specified by:

getResultSetHoldability in interface java.sql.Statement

Returns:

either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT

Throws:

java.sql.SQLException - if a database access error occurs

addBatch

public void addBatch(java.lang.String sql)
              throws java.sql.SQLException

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

Specified by:

addBatch in interface java.sql.Statement

Parameters:

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

Throws:

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

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

clearBatch

public void clearBatch()
                throws java.sql.SQLException

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

Specified by:

clearBatch in interface java.sql.Statement

Throws:

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

Since:

1.2

See Also:

What Is in the JDBC 2.0 API

executeBatch

public int[] executeBatch()
                   throws java.sql.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 obejct has been thrown.

Specified by:

executeBatch in interface java.sql.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:

java.sql.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

See Also:

What Is in the JDBC 2.0 API

toArray

protected int[] toArray(java.util.Collection<java.lang.Integer> list)

Convert collection of Integer elements into array of int.

Parameters:

list - collection of integer elements.

Returns:

array of int.

getConnection

public java.sql.Connection getConnection()
                                  throws java.sql.SQLException

Returns the Connection object that produced this Statement object.

Specified by:

getConnection in interface java.sql.Statement

Returns:

the connection that produced this statement

Throws:

java.sql.SQLException

forgetResultSet

public void forgetResultSet()

getCurrentResultSet

public java.sql.ResultSet getCurrentResultSet()
                                       throws java.sql.SQLException

Description copied from interface: FirebirdStatement

Get current result set. Behaviour of this method is similar to the behavior of the Statement.getResultSet(), except that this method can be called as much as you like.

Specified by:

getCurrentResultSet in interface FirebirdStatement

Returns:

instance of ResultSet representing current result set or null if it is not available.

Throws:

java.sql.SQLException - if database access error happened.

isPoolable

public boolean isPoolable()
                   throws java.sql.SQLException

Specified by:

isPoolable in interface java.sql.Statement

Throws:

java.sql.SQLException

setPoolable

public void setPoolable(boolean poolable)
                 throws java.sql.SQLException

Specified by:

setPoolable in interface java.sql.Statement

Throws:

java.sql.SQLException

isWrapperFor

public boolean isWrapperFor(java.lang.Class<?> iface)
                     throws java.sql.SQLException

Specified by:

isWrapperFor in interface java.sql.Wrapper

Throws:

java.sql.SQLException

unwrap

public <T> T unwrap(java.lang.Class<T> iface)
         throws java.sql.SQLException

Specified by:

unwrap in interface java.sql.Wrapper

Throws:

java.sql.SQLException

closeOnCompletion

public void closeOnCompletion()

isCloseOnCompletion

public boolean isCloseOnCompletion()

isExecuteProcedureStatement

protected boolean isExecuteProcedureStatement(java.lang.String sql)
                                       throws java.sql.SQLException

This method checks if supplied statement is executing procedure or it is generic statement. This check is needed to handle correctly parameters that are returned from non-selectable procedures.

Parameters:

sql - SQL statement to check

Returns:

true if supplied statement is EXECUTE PROCEDURE type of statement.

Throws:

java.sql.SQLException - if translating statement into native code failed.

internalExecute

protected boolean internalExecute(java.lang.String sql)
                           throws GDSException,
                                  java.sql.SQLException

Throws:

GDSException

java.sql.SQLException

prepareFixedStatement

protected void prepareFixedStatement(java.lang.String sql,
                                     boolean describeBind)
                              throws GDSException,
                                     java.sql.SQLException

Throws:

GDSException

java.sql.SQLException

addWarning

protected void addWarning(java.sql.SQLWarning warning)

nativeSQL

protected java.lang.String nativeSQL(java.lang.String sql)
                              throws java.sql.SQLException

Throws:

java.sql.SQLException

getLastExecutionPlan

public java.lang.String getLastExecutionPlan()
                                      throws java.sql.SQLException

Description copied from interface: FirebirdStatement

Get execution plan for the last executed statement. Unlike the FirebirdPreparedStatement.getExecutionPlan(), this method can be called only after executing a query or update statement.

Specified by:

getLastExecutionPlan in interface FirebirdStatement

Returns:

execution plan returned by the server.

Throws:

java.sql.SQLException - if no statement was executed before calling this method, statement is not valid, or there was an error when obtaining the execution plan.

checkValidity

protected void checkValidity()
                      throws java.sql.SQLException

Check if this statement is valid. This method should be invoked before executing any action which requires a valid connection.

Throws:

java.sql.SQLException - if this Statement has been closed and cannot be used anymore.

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object