/* Copyright (c) 2001-2010, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb.jdbc;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
import org.hsqldb.HsqlException;
import org.hsqldb.StatementTypes;
import org.hsqldb.navigator.RowSetNavigator;
import org.hsqldb.result.Result;
import org.hsqldb.result.ResultProperties;
/* $Id: JDBCStatement.java 3529 2010-03-16 14:23:19Z fredt $ */
// fredt@users 20020320 - patch 1.7.0 - JDBC 2 support and error trapping
//
// JDBC 2 methods can now be called from jdk 1.1.x - see javadoc comments
// SCROLL_INSENSITIVE and FORWARD_ONLY types for ResultSet are now supported
//
// boucherb@users 20020509 - added "throws SQLException" to all methods where
// it was missing here but specified in the
// java.sql.Statement interface,
// updated generic documentation to JDK 1.4, and
// added JDBC3 methods and docs
// boucherb & 20020505 - extensive review and update of docs and behaviour
// fredt@users to comply with java.sql specification
// fredt@users 20030620 - patch 1.7.2 - rewritten and simplified
// boucherb@users 200404xx - javadoc updates toward 1.7.2 final
// boucherb@users 20051207 - patch 1.8.0.x initial JDBC 4.0 support work
// boucherb@users 20060522 - doc 1.9.0 full synch up to Mustang Build 84
// Revision 1.16 2006/07/12 12:40:59 boucherb
// patch 1.9.0
// - full synch up to Mustang b90
/**
* <!-- start generic documentation -->
* <P>The object used for executing a static SQL statement
* and returning the results it produces.
* <P>
* By default, only one <code>ResultSet</code> object per <code>Statement</code>
* object can be open at the same time. Therefore, if the reading of one
* <code>ResultSet</code> object is interleaved
* with the reading of another, each must have been generated by
* different <code>Statement</code> objects. All execution methods in the
* <code>Statement</code> interface implicitly close a statment's current
* <code>ResultSet</code> object if an open one exists.
* <!-- end generic documentation-->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3><p>
* From version 2.0, the implementation meets the JDBC specification
* requirment that any existing ResultSet is closed when execute() or
* executeQuery() methods are called.
* <p>
*
* <b>JRE 1.1.x Notes:</b> <p>
*
* In general, JDBC 2 support requires Java 1.2 and above, and JDBC3 requires
* Java 1.4 and above. In HSQLDB, support for methods introduced in different
* versions of JDBC depends on the JDK version used for compiling and building
* HSQLDB.<p>
*
* Since 1.7.0, all JDBC 2 methods can be called while executing under the
* version 1.1.x
* <em>Java Runtime Environment</em><sup><font size="-2">TM</font></sup>.
* However, in addition to this technique requiring explicit casts to the
* org.hsqldb.jdbc.* classes, some of these method calls require
* <code>int</code> values that are defined only in the JDBC 2 or greater
* version of the {@link java.sql.ResultSet ResultSet} interface. For this
* reason these values are defined in {@link JDBCResultSet JDBCResultSet}.<p>
*
* In a JRE 1.1.x environment, calling JDBC 2 methods that take or return the
* JDBC2-only <code>ResultSet</code> values can be achieved by referring
* to them in parameter specifications and return value comparisons,
* respectively, as follows: <p>
*
* <pre class="JavaCodeExample">
* JDBCResultSet.FETCH_FORWARD
* JDBCResultSet.TYPE_FORWARD_ONLY
* JDBCResultSet.TYPE_SCROLL_INSENSITIVE
* JDBCResultSet.CONCUR_READ_ONLY
* //etc.
* </pre> <p>
*
* However, please note that code written to use HSQLDB JDBC 2 features under
* JDK 1.1.x will not be compatible for use with other JDBC 2 drivers. Please
* also note that this feature is offered solely as a convenience to developers
* who must work under JDK 1.1.x due to operating constraints, yet wish to
* use some of the more advanced features available under the JDBC 2
* specification. <p>
*
* (fredt@users)<br>
* (boucherb@users)<p>
*
* </div>
* <!-- end release-specific documentation -->
*
* @author Campbell Boucher-Burnett (boucherb@users dot sourceforge.net)
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.0
* @revised JDK 1.6, HSQLDB 2.0
* @see JDBCConnection#createStatement
* @see JDBCResultSet
*/
//#ifdef JAVA6
public class JDBCStatement extends JDBCStatementBase implements Statement,
java.sql.Wrapper {
//#else
/*
public class JDBCStatement extends JDBCStatementBase implements Statement {
*/
//#endif JAVA6
/**
* <!-- start generic documentation -->
* Executes the given SQL statement, which returns a single
* <code>ResultSet</code> object.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* This method should not be used for statements other than SELECT queries.<p>
*
* From 2.0, HSQLDB throws an exception when the statement
* is a DDL statement or an UPDATE or DELETE statement.
* </div>
* <!-- end release-specific documentation -->
*
* @param sql an SQL statement to be sent to the database, typically a
* static SQL <code>SELECT</code> statement
* @return a <code>ResultSet</code> object that contains the data produced
* by the given query; never <code>null</code>
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the given
* SQL statement produces anything other than a single
* <code>ResultSet</code> object
*/
public synchronized ResultSet executeQuery(
String sql) throws SQLException {
fetchResult(sql, StatementTypes.RETURN_RESULT,
JDBCStatementBase.NO_GENERATED_KEYS, null, null);
return getResultSet();
}
/**
* <!-- start generic documentation -->
* Executes the given SQL statement, which may be an <code>INSERT</code>,
* <code>UPDATE</code>, or <code>DELETE</code> statement or an
* SQL statement that returns nothing, such as an SQL DDL statement.
* <!-- end generic documentation -->
*
* @param sql (JDBC4 clarification:) an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code>; or an SQL statement that returns nothing,
* such as a DDL statement.
*
* @return (JDBC4 clarification:) either (1) the row count for SQL Data Manipulation Language (DML) statements
* or (2) 0 for SQL statements that return nothing
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the given
* SQL statement produces a <code>ResultSet</code> object
*/
public synchronized int executeUpdate(String sql) throws SQLException {
fetchResult(sql, StatementTypes.RETURN_COUNT,
JDBCStatementBase.NO_GENERATED_KEYS, null, null);
return resultIn.getUpdateCount();
}
/**
* <!-- start generic documentation -->
* Releases this <code>Statement</code> 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.
* <P>
* Calling the method <code>close</code> on a <code>Statement</code>
* object that is already closed has no effect.
* <P>
* <B>Note:</B>When a <code>Statement</code> object is
* closed, its current <code>ResultSet</code> object, if one exists, is
* also closed.
* (JDBC4 deleted:) [A <code>Statement</code> object is
* automatically closed when it is garbage collected.]
* <!-- end generic documentation -->
*
* @exception SQLException if a database access error occurs
*/
public synchronized void close() throws SQLException {
if (isClosed) {
return;
}
closeResultData();
batchResultOut = null;
connection = null;
resultIn = null;
resultOut = null;
isClosed = true;
}
//----------------------------------------------------------------------
/**
* <!-- start generic documentation -->
* Retrieves the maximum number of bytes that can be
* returned for character and binary column values in a <code>ResultSet</code>
* object produced by this <code>Statement</code> object.
* This limit applies only to <code>BINARY</code>, <code>VARBINARY</code>,
* <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>,
* (JDBC4 new:) <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code>
* and <code>LONGVARCHAR</code> columns. If the limit is exceeded, the
* excess data is silently discarded.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Including 1.7.2, HSQLDB always returns zero, meaning there
* is no limit.
* </div>
* <!-- end release-specific documentation -->
*
* @return the current column size limit for columns storing character and
* binary values; zero means there is no limit
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #setMaxFieldSize
*/
public synchronized int getMaxFieldSize() throws SQLException {
checkClosed();
return 0;
}
/**
* <!-- start generic documentation -->
* (JDBC4 clarification:) Sets the limit for the maximum number of bytes in a <code>ResultSet</code>
* Sets the limit for the maximum number of bytes that can be returned for
* character and binary column values in a <code>ResultSet</code>
* object produced by this <code>Statement</code> object.
*
* This limit applies
* only to <code>BINARY</code>, <code>VARBINARY</code>,
* <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>,
* (JDBC4 new:) <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code> and
* <code>LONGVARCHAR</code> fields. If the limit is exceeded, the excess data
* is silently discarded. For maximum portability, use values
* greater than 256.
* <!-- emd generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* To present, calls to this method are simply ignored; HSQLDB always
* stores the full number of bytes when dealing with any of the field types
* mentioned above. These types all have an absolute maximum element upper
* bound determined by the Java array index limit
* java.lang.Integer.MAX_VALUE. For XXXBINARY types, this translates to
* Integer.MAX_VALUE bytes. For XXXCHAR types, this translates to
* 2 * Integer.MAX_VALUE bytes (2 bytes / character). <p>
*
* In practice, field sizes are limited to values much smaller than the
* absolute maximum element upper bound, in particular due to limits imposed
* on the maximum available Java heap memory.
* </div>
* <!-- end release-specific documentation -->
*
* @param max the new column size limit in bytes; zero means there is no limit
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>
* or the condition max >= 0 is not satisfied
* @see #getMaxFieldSize
*/
public void setMaxFieldSize(int max) throws SQLException {
checkClosed();
if (max < 0) {
throw Util.outOfRangeArgument();
}
}
/**
* <!-- start generic documentation -->
* Retrieves the maximum number of rows that a
* <code>ResultSet</code> object produced by this
* <code>Statement</code> object can contain. If this limit is exceeded,
* the excess rows are silently dropped.
* <!-- start generic documentation -->
*
* @return the current maximum number of rows for a <code>ResultSet</code>
* object produced by this <code>Statement</code> object;
* zero means there is no limit
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #setMaxRows
*/
public synchronized int getMaxRows() throws SQLException {
checkClosed();
return maxRows;
}
/**
* <!-- start generic documentation -->
* (JDBC4 clarification:)
* Sets the limit for the maximum number of rows that any
* <code>ResultSet</code> object generated by this <code>Statement</code>
* object can contain to the given number.
* If the limit is exceeded, the excess
* rows are silently dropped.
* <!-- end generic documentation -->
*
* @param max the new max rows limit; zero means there is no limit
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>
* or the condition max >= 0 is not satisfied
* @see #getMaxRows
*/
public synchronized void setMaxRows(int max) throws SQLException {
checkClosed();
if (max < 0) {
throw Util.outOfRangeArgument();
}
maxRows = max;
}
/**
* <!-- start generic documentation -->
* Sets escape processing on or off.
* If escape scanning is on (the default), the driver will do
* escape substitution before sending the SQL statement to the database.
*
* Note: Since prepared statements have usually been parsed prior
* to making this call, disabling escape processing for
* <code>PreparedStatements</code> objects will have no effect.
* <!-- end generic documentation -->
*
* @param enable <code>true</code> to enable escape processing;
* <code>false</code> to disable it
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
*/
public void setEscapeProcessing(boolean enable) throws SQLException {
checkClosed();
isEscapeProcessing = enable;
}
/**
* <!-- start generic documentation -->
* Retrieves the number of seconds the driver will
* wait for a <code>Statement</code> object to execute.
* If the limit is exceeded, a
* <code>SQLException</code> is thrown.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* To present, HSQLDB always returns zero, meaning there
* is no limit.
* </div>
* <!-- end release-specific documentation -->
*
* @return the current query timeout limit in seconds; zero means there is
* no limit
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #setQueryTimeout
*/
public synchronized int getQueryTimeout() throws SQLException {
checkClosed();
return 0;
}
/**
* <!-- start generic documentation -->
* Sets the number of seconds the driver will wait for a
* <code>Statement</code> object to execute to the given number of seconds.
* If the limit is exceeded, an <code>SQLException</code> is thrown. A JDBC
* (JDBC4 clarification:)
* driver must apply this limit to the <code>execute</code>,
* <code>executeQuery</code> and <code>executeUpdate</code> methods. JDBC driver
* implementations may also apply this limit to <code>ResultSet</code> methods
* (consult your driver vendor documentation for details).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* The maximum value is Short.MAX_VALUE. The minimum is 0, indicating no limit.
* In version 2.0, calls to this method are ignored; HSQLDB waits an
* unlimited amount of time for statement execution
* requests to return.
* </div>
* <!-- end release-specific documentation -->
*
* @param seconds the new query timeout limit in seconds; zero means
* there is no limit
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>
* or the condition seconds >= 0 is not satisfied
* @see #getQueryTimeout
*/
public void setQueryTimeout(int seconds) throws SQLException {
checkClosed();
if (seconds < 0 || seconds > Short.MAX_VALUE) {
throw Util.outOfRangeArgument();
}
queryTimeout = seconds;
}
/**
* <!-- start generic documentation -->
* Cancels this <code>Statement</code> 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.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Including 2.0, HSQLDB does <i>not</i> support aborting an SQL
* statement; calls to this method are ignored.
* </div>
* <!-- end release-specific documentation -->
*
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
*/
public synchronized void cancel() throws SQLException {
checkClosed();
}
/**
* <!-- start generic documentation -->
* Retrieves the first warning reported by calls on this <code>Statement</code> object.
* Subsequent <code>Statement</code> object warnings will be chained to this
* <code>SQLWarning</code> object.
*
* <p>The warning chain is automatically cleared each time
* a statement is (re)executed. This method may not be called on a closed
* <code>Statement</code> object; doing so will cause an <code>SQLException</code>
* to be thrown.
*
* <P><B>Note:</B> If you are processing a <code>ResultSet</code> object, any
* warnings associated with reads on that <code>ResultSet</code> object
* will be chained on it rather than on the <code>Statement</code>
* object that produced it.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* In 2.0, HSQLDB may produces Statement warnings;
* this method always returns null.
* </div>
* <!-- end release-specific documentation -->
*
* @return the first <code>SQLWarning</code> object or <code>null</code>
* if there are no warnings
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
*/
public synchronized SQLWarning getWarnings() throws SQLException {
checkClosed();
return rootWarning;
}
/**
* <!-- start generic documentation -->
* Clears all the warnings reported on this <code>Statement</code>
* object. After a call to this method,
* the method <code>getWarnings</code> will return
* <code>null</code> until a new warning is reported for this
* <code>Statement</code> object.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* In HSQLDB 2.0, <code>SQLWarning</code> objects may
* be produced for Statement Objects; calls to this method clear the warnings.
* </div>
* <!-- end release-specific documentation -->
*
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
*/
public synchronized void clearWarnings() throws SQLException {
checkClosed();
rootWarning = null;
}
/** @todo 1.9.0 - implement */
/**
* <!-- start generic documentation -->
* Sets the SQL cursor name to the given <code>String</code>, which
* will be used by subsequent <code>Statement</code> object
* <code>execute</code> methods. This name can then be
* used in SQL positioned update or delete statements to identify the
* current row in the <code>ResultSet</code> object generated by this
* statement. If the database does not 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 <code>SELECT</code> statement
* should have the form <code>SELECT FOR UPDATE</code>. If
* <code>FOR UPDATE</code> is not present, positioned updates may fail.
*
* <P><B>Note:</B> By definition, the execution of positioned updates and
* deletes must be done by a different <code>Statement</code> object than
* the one that generated the <code>ResultSet</code> object being used for
* positioning. Also, cursor names must be unique within a connection.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Including 2.0, HSQLDB does not support named cursors;
* calls to this method are ignored.
* </div>
* <!-- end release-specific documentation -->
*
* @param name the new cursor name, which must be unique within
* a connection
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
*/
public void setCursorName(String name) throws SQLException {
checkClosed();
}
//----------------------- Multiple Results --------------------------
/**
* <!-- start generic documentation -->
* Executes the given SQL statement, which may return multiple results.
* 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.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
* <!-- end generic documentation -->
*
* @param sql any SQL statement
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no results
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
*/
public synchronized boolean execute(String sql) throws SQLException {
fetchResult(sql, StatementTypes.RETURN_ANY,
JDBCStatementBase.NO_GENERATED_KEYS, null, null);
return resultIn.isData();
}
/**
* <!-- start generic documentation -->
* Retrieves the current result as a <code>ResultSet</code> object.
* This method should be called only once per result.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* </div>
* <!-- end release-specific documentation -->
*
* @return the current result as a <code>ResultSet</code> object or
* <code>null</code> if the result is an update count or there are no more results
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #execute
*/
public synchronized ResultSet getResultSet() throws SQLException {
return super.getResultSet();
}
/**
* <!-- start generic documentation -->
* Retrieves the current result as an update count;
* if the result is a <code>ResultSet</code> object or there are no more results, -1
* is returned. This method should be called only once per result.
* <!-- end generic documentation -->
*
* @return the current result as an update count; -1 if the current result is a
* <code>ResultSet</code> object or there are no more results
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #execute
*/
public synchronized int getUpdateCount() throws SQLException {
return super.getUpdateCount();
}
/**
* <!-- start generic documentation -->
* Moves to this <code>Statement</code> object's next result, returns
* <code>true</code> if it is a <code>ResultSet</code> object, and
* implicitly closes any current <code>ResultSet</code>
* object(s) obtained with the method <code>getResultSet</code>.
*
* <P>There are no more results when the following is true:
* <PRE>
* // stmt is a Statement object
* ((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))
* </PRE>
* <!-- end generic documentation -->
*
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no more results
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @see #execute
*/
public synchronized boolean getMoreResults() throws SQLException {
return getMoreResults(JDBCStatementBase.CLOSE_CURRENT_RESULT);
}
//--------------------------JDBC 2.0-----------------------------
/**
* <!-- start generic documentation -->
* Gives the driver a hint as to the direction in which
* rows will be processed in <code>ResultSet</code>
* objects created using this <code>Statement</code> object. The
* default value is <code>ResultSet.FETCH_FORWARD</code>.
* <P>
* Note that this method sets the default fetch direction for
* result sets generated by this <code>Statement</code> object.
* Each result set has its own methods for getting and setting
* its own fetch direction.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB accepts all valid parameters. <p>
* <!-- end release-specific documentation -->
*
* @param direction the initial direction for processing rows
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>
* or the given direction
* is not one of <code>ResultSet.FETCH_FORWARD</code>,
* <code>ResultSet.FETCH_REVERSE</code>, or <code>ResultSet.FETCH_UNKNOWN</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
* @see #getFetchDirection
*/
public synchronized void setFetchDirection(
int direction) throws SQLException {
checkClosed();
checkClosed();
switch (direction) {
case JDBCResultSet.FETCH_FORWARD :
case JDBCResultSet.FETCH_REVERSE :
case JDBCResultSet.FETCH_UNKNOWN :
fetchDirection = direction;
break;
default :
throw Util.invalidArgument();
}
}
/**
* <!-- start generic documentation -->
* Retrieves the direction for fetching rows from
* database tables that is the default for result sets
* generated from this <code>Statement</code> object.
* If this <code>Statement</code> object has not set
* a fetch direction by calling the method <code>setFetchDirection</code>,
* the return value is implementation-specific.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB returns the fetch direction. <p>
* </div>
* <!-- end release-specific documentation -->
*
* @return the default fetch direction for result sets generated
* from this <code>Statement</code> object
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
* @see #setFetchDirection
*/
public int getFetchDirection() throws SQLException {
checkClosed();
return this.fetchDirection;
}
/**
* <!-- start generic documentation -->
* (JDBC4 clarification:)
* Gives the JDBC driver a hint as to the number of rows that should
* be fetched from the database when more rows are needed for
* <code>ResultSet</code> objects genrated by this <code>Statement</code>.
* If the value specified is zero, then the hint is ignored.
* The default value is zero.
* <!-- start generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB uses the specified value as a hint, but may process more or fewer
* rows than specified.
* </div>
* <!-- end release-specific documentation -->
*
* @param rows the number of rows to fetch
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* (JDBC4 modified:)
* condition <code>rows >= 0</code> is not satisfied.
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
* @see #getFetchSize
*/
public synchronized void setFetchSize(int rows) throws SQLException {
checkClosed();
if (rows < 0) {
throw Util.outOfRangeArgument();
}
fetchSize = rows;
}
/**
* <!-- start generic documentation -->
* Retrieves the number of result set rows that is the default
* fetch size for <code>ResultSet</code> objects
* generated from this <code>Statement</code> object.
* If this <code>Statement</code> object has not set
* a fetch size by calling the method <code>setFetchSize</code>,
* the return value is implementation-specific.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <b>HSQLDB-Specific Information</b> <p>
*
* HSQLDB returns 0 by default, or the fetch size specified by setFetchSize
* </div>
* <!-- end release-specific documentation -->
*
* @return the default fetch size for result sets generated
* from this <code>Statement</code> object
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
* @see #setFetchSize
*/
public synchronized int getFetchSize() throws SQLException {
checkClosed();
return fetchSize;
}
/**
* <!-- start generic documentation -->
* Retrieves the result set concurrency for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB supports <code>CONCUR_READ_ONLY</code> and
* <code>CONCUR_UPDATABLE</code> concurrency.
* </div>
* <!-- end release-specific documentation -->
*
* @return either <code>ResultSet.CONCUR_READ_ONLY</code> or
* <code>ResultSet.CONCUR_UPDATABLE</code>
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
*/
public synchronized int getResultSetConcurrency() throws SQLException {
checkClosed();
return ResultProperties.getJDBCConcurrency(rsProperties);
}
/**
* <!-- start generic documentation -->
* Retrieves the result set type for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB 1.7.0 and later versions support <code>TYPE_FORWARD_ONLY</code>
* and <code>TYPE_SCROLL_INSENSITIVE</code>.
* </div>
* <!-- end release-specific documentation -->
*
* @return one of <code>ResultSet.TYPE_FORWARD_ONLY</code>,
* <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
* <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
*/
public synchronized int getResultSetType() throws SQLException {
checkClosed();
return ResultProperties.getJDBCScrollability(rsProperties);
}
/**
* <!-- start generic documentation -->
* Adds the given SQL command to the current list of commmands for this
* <code>Statement</code> object. The commands in this list can be
* executed as a batch by calling the method <code>executeBatch</code>.
* <P>
* (JDBC4 clarification:)<p>
* <B>NOTE:</B> Support of an ability to batch updates is optional.
*
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 1.7.2, this feature is supported.
* </div>
* <!-- end release-specific documentation -->
*
* @param sql typically this is a SQL <code>INSERT</code> or
* <code>UPDATE</code> statement
* (:JDBC4 modified)
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* driver does not support batch updates
* @see #executeBatch
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
*/
public synchronized void addBatch(String sql) throws SQLException {
checkClosed();
if (isEscapeProcessing) {
sql = connection.nativeSQL(sql);
}
if (batchResultOut == null) {
batchResultOut = Result.newBatchedExecuteRequest();
}
batchResultOut.getNavigator().add(new Object[] { sql });
}
/**
* <!-- start generic documentation -->
* Empties this <code>Statement</code> object's current list of
* SQL commands.
* <P>
* (JDBC4 clarification:) <p>
* <B>NOTE:</B> Support of an ability to batch updates is optional.
* <!-- start generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with HSQLDB 1.7.2, this feature is supported.
* </div>
* <!-- end release-specific documentation -->
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* driver does not support batch updates
* @see #addBatch
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
*/
public synchronized void clearBatch() throws SQLException {
checkClosed();
if (batchResultOut != null) {
batchResultOut.getNavigator().clear();
}
}
/**
* <!-- start generic documentation -->
* Submits a batch of commands to the database for execution and
* if all commands execute successfully, returns an array of update counts.
* The <code>int</code> 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 <code>executeBatch</code>
* may be one of the following:
* <OL>
* <LI>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
* <LI>A value of <code>SUCCESS_NO_INFO</code> -- indicates that the command was
* processed successfully but that the number of rows affected is
* unknown
* <P>
* If one of the commands in a batch update fails to execute properly,
* this method throws a <code>BatchUpdateException</code>, 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
* <code>BatchUpdateException.getUpdateCounts</code>
* will contain as many elements as there are commands in the batch, and
* at least one of the elements will be the following:
* <P>
* <LI>A value of <code>EXECUTE_FAILED</code> -- indicates that the command failed
* to execute successfully and occurs only if a driver continues to
* process commands after a command fails
* </OL>
* <P>
* (JDBC4 clarification:) <p>
* <B>NOTE:</B> Support of an ability to batch updates is optional.
* <p>
* 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 <code>BatchUpdateException</code> obejct has been thrown.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with HSQLDB 1.7.2, this feature is supported. <p>
*
* HSQLDB stops execution of commands in a batch when one of the commands
* results in an exception. The size of the returned array equals the
* number of commands that were executed successfully.<p>
*
* When the product is built under the JAVA1 target, an exception
* is never thrown and it is the responsibility of the client software to
* check the size of the returned update count array to determine if any
* batch items failed. To build and run under the JAVA2 target, JDK/JRE
* 1.3 or higher must be used.
* </div>
* <!-- end release-specific documentation -->
*
* @return 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.
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* driver does not support batch statements. Throws {@link BatchUpdateException}
* (a subclass of <code>SQLException</code>) if one of the commands sent to the
* database fails to execute properly or attempts to return a result set.
*
*
* @see #addBatch
* @see java.sql.DatabaseMetaData#supportsBatchUpdates
* @since JDK 1.3 (JDK 1.1.x developers: read the overview for
* JDBCStatement)
*/
public synchronized int[] executeBatch() throws SQLException {
checkClosed();
generatedResult = null;
if (batchResultOut == null) {
batchResultOut = Result.newBatchedExecuteRequest();
}
int batchCount = batchResultOut.getNavigator().getSize();
try {
resultIn = connection.sessionProxy.execute(batchResultOut);
performPostExecute();
} catch (HsqlException e) {
batchResultOut.getNavigator().clear();
throw Util.sqlException(e);
}
batchResultOut.getNavigator().clear();
if (resultIn.isError()) {
throw Util.sqlException(resultIn);
}
RowSetNavigator navigator = resultIn.getNavigator();
int[] updateCounts = new int[navigator.getSize()];
for (int i = 0; i < updateCounts.length; i++) {
Object[] data = (Object[]) navigator.getNext();
updateCounts[i] = ((Integer) data[0]).intValue();
}
if (updateCounts.length != batchCount) {
if (errorResult == null) {
throw new BatchUpdateException(updateCounts);
} else {
errorResult.getMainString();
throw new BatchUpdateException(errorResult.getMainString(),
errorResult.getSubString(),
errorResult.getErrorCode(), updateCounts);
}
}
return updateCounts;
}
/**
* <!-- start generic documentation -->
* Retrieves the <code>Connection</code> object
* that produced this <code>Statement</code> object.
* <!-- end generic documentation -->
*
* @return the connection that produced this statement
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.2 (JDK 1.1.x developers: read the overview
* for JDBCStatement)
*/
public synchronized Connection getConnection() throws SQLException {
checkClosed();
return connection;
}
//--------------------------JDBC 3.0-----------------------------
/**
* <!-- start generic documentation -->
* Moves to this <code>Statement</code> object's next result, deals with
* any current <code>ResultSet</code> object(s) according to the instructions
* specified by the given flag, and returns
* <code>true</code> if the next result is a <code>ResultSet</code> object.
*
* <P>There are no more results when the following is true:
* <PRE>
* // stmt is a Statement object
* ((stmt.getMoreResults(current) == false) && (stmt.getUpdateCount() == -1))
* </PRE>
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* HSQLDB moves to the next ResultSet and returns the correct result. <p>
* </div>
* <!-- end release-specific documentation -->
*
* @param current one of the following <code>Statement</code>
* constants indicating what should happen to current
* <code>ResultSet</code> objects obtained using the method
* <code>getResultSet</code>:
* <code>Statement.CLOSE_CURRENT_RESULT</code>,
* <code>Statement.KEEP_CURRENT_RESULT</code>, or
* <code>Statement.CLOSE_ALL_RESULTS</code>
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are no
* more results
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the argument
* supplied is not one of the following:
* <code>Statement.CLOSE_CURRENT_RESULT</code>,
* <code>Statement.KEEP_CURRENT_RESULT</code>, or
* <code>Statement.CLOSE_ALL_RESULTS</code>
* @since JDK 1.4, HSQLDB 1.7
* @see #execute
*/
//#ifdef JAVA4
public synchronized boolean getMoreResults(
int current) throws SQLException {
return super.getMoreResults(current);
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* Retrieves any auto-generated keys created as a result of executing this
* <code>Statement</code> object. If this <code>Statement</code> object did
* not generate any keys, an empty <code>ResultSet</code>
* object is returned.
* <p>(JDBC4 clarification:)
* <p><B>Note:</B>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.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Supported in version 2.0 <p>
*
* If column names or indexes provided by the user in the executeUpdate()
* method calls are not correct, an empty result is returned.
*
* </div>
* <!-- end release-specific documentation -->
*
* @return a <code>ResultSet</code> object containing the auto-generated key(s)
* generated by the execution of this <code>Statement</code> object
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized ResultSet getGeneratedKeys() throws SQLException {
return getGeneratedResultSet();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* Executes the given SQL statement and signals the driver with the
* given flag about whether the
* auto-generated keys produced by this <code>Statement</code> object
* should be made available for retrieval. The driver will ignore the
* flag if the SQL statement
* is not an <code>INSERT</code> statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with version 2.0, HSQLDB supports this feature.
*
* </div>
* <!-- end release-specific documentation -->
* @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code>; or an SQL statement that returns nothing,
* such as a DDL statement.
* (:JDBC4 clarification)
*
* @param autoGeneratedKeys a flag indicating whether auto-generated keys
* should be made available for retrieval;
* one of the following constants:
* <code>Statement.RETURN_GENERATED_KEYS</code>
* <code>Statement.NO_GENERATED_KEYS</code>
* @return either (1) the row count for SQL Data Manipulation Language (DML) statements
* or (2) 0 for SQL statements that return nothing
* (:JDBC4 clarification)
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>, the given
* SQL statement returns a <code>ResultSet</code> object, or
* the given constant is not one of those allowed
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method with a constant of Statement.RETURN_GENERATED_KEYS
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized int executeUpdate(String sql,
int autoGeneratedKeys) throws SQLException {
if (autoGeneratedKeys != Statement.RETURN_GENERATED_KEYS
&& autoGeneratedKeys != Statement.NO_GENERATED_KEYS) {
throw Util.invalidArgument("autoGeneratedKeys");
}
fetchResult(sql, StatementTypes.RETURN_COUNT, autoGeneratedKeys, null,
null);
if (resultIn.isError()) {
throw Util.sqlException(resultIn);
}
return resultIn.getUpdateCount();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* 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 <code>INSERT</code> statement, or an SQL statement able to return
* (JDBC 4 clarification)
* auto-generated keys (the list of such statements is vendor-specific).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with version 2.0, HSQLDB supports this feature with single-row and
* multi-row inserts. <p>
* CHECKME: possibly change method depending to final GENERATED column support.
*
* </div>
* <!-- end release-specific documentation -->
*
* @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code>; or an SQL statement that returns nothing,
* such as a DDL statement.
* (:JDBC4 clarification)
*
* @param columnIndexes an array of column indexes indicating the columns
* that should be returned from the inserted row
* @return either (1) the row count for SQL Data Manipulation Language (DML) statements
* or (2) 0 for SQL statements that return nothing
* (:JDBC 4 clarification)
*
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>, the SQL
* statement returns a <code>ResultSet</code> object, or the
* second argument supplied to this method is not an <code>int</code> array
* whose elements are valid column indexes
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized int executeUpdate(String sql,
int[] columnIndexes) throws SQLException {
if (columnIndexes == null || columnIndexes.length == 0) {
throw Util.invalidArgument("columnIndexes");
}
fetchResult(sql, StatementTypes.RETURN_COUNT,
Statement.RETURN_GENERATED_KEYS, columnIndexes, null);
return resultIn.getUpdateCount();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* 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
* (JDBC4 clarification:)
* is not an <code>INSERT</code> statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 2.0, HSQLDB supports this feature.
*
* </div>
* <!-- end release-specific documentation -->
*
* @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
* <code>DELETE</code>; or an SQL statement that returns nothing,
* such as a DDL statement.
* (:JDBC4 clarification)
* @param columnNames an array of the names of the columns that should be
* returned from the inserted row
* @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
* or <code>DELETE</code> statements, or 0 for SQL statements
* that return nothing
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code>, the SQL
* statement returns a <code>ResultSet</code> object, or the
* second argument supplied to this method is not a <code>String</code> array
* whose elements are valid column names
*
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized int executeUpdate(String sql,
String[] columnNames) throws SQLException {
if (columnNames == null || columnNames.length == 0) {
throw Util.invalidArgument("columnIndexes");
}
fetchResult(sql, StatementTypes.RETURN_COUNT,
Statement.RETURN_GENERATED_KEYS, null, columnNames);
return resultIn.getUpdateCount();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* 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 <code>INSERT</code> statement, or an SQL statement able to return
* (JDBC4 clarification)
* auto-generated keys (the list of such statements is vendor-specific).
* <P>
* 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.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 2.0, HSQLDB supports this feature.
*
* </div>
* <!-- end release-specific documentation -->
*
* @param sql any SQL statement
* @param autoGeneratedKeys a constant indicating whether auto-generated
* keys should be made available for retrieval using the method
* <code>getGeneratedKeys</code>; one of the following constants:
* <code>Statement.RETURN_GENERATED_KEYS</code> or
* <code>Statement.NO_GENERATED_KEYS</code>
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there are
* no results
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the second
* parameter supplied to this method is not
* <code>Statement.RETURN_GENERATED_KEYS</code> or
* <code>Statement.NO_GENERATED_KEYS</code>.
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method with a constant of Statement.RETURN_GENERATED_KEYS
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized boolean execute(
String sql, int autoGeneratedKeys) throws SQLException {
if (autoGeneratedKeys != Statement.RETURN_GENERATED_KEYS
&& autoGeneratedKeys != Statement.NO_GENERATED_KEYS) {
throw Util.invalidArgument("autoGeneratedKeys");
}
fetchResult(sql, StatementTypes.RETURN_ANY, autoGeneratedKeys, null,
null);
return resultIn.isData();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* 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
* (JDBC4 clarification)
* is not an <code>INSERT</code> statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
* <P>
* 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.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 2.0, HSQLDB supports this feature.
*
* </div>
* <!-- end release-specific documentation -->
*
* @param sql any SQL statement
* @param 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 <code>getGeneratedKeys</code>
* @return <code>true</code> if the first result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there
* are no results
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* elements in the <code>int</code> array passed to this method
* are not valid column indexes
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized boolean execute(
String sql, int[] columnIndexes) throws SQLException {
if (columnIndexes == null || columnIndexes.length == 0) {
throw Util.invalidArgument("columnIndexes");
}
fetchResult(sql, StatementTypes.RETURN_ANY,
Statement.RETURN_GENERATED_KEYS, columnIndexes, null);
return resultIn.isData();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* 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 <code>INSERT</code> statement, or an SQL statement able to return
* auto-generated keys (the list of such statements is vendor-specific).
* <P>
* 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.
* <P>
* The <code>execute</code> method executes an SQL statement and indicates the
* form of the first result. You must then use the methods
* <code>getResultSet</code> or <code>getUpdateCount</code>
* to retrieve the result, and <code>getMoreResults</code> to
* move to any subsequent result(s).
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 2.0, HSQLDB supports this feature.
*
* </div>
* <!-- end release-specific documentation -->
*
* @param sql any SQL statement
* @param 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 <code>getGeneratedKeys</code>
* @return <code>true</code> if the next result is a <code>ResultSet</code>
* object; <code>false</code> if it is an update count or there
* are no more results
* @exception SQLException if a database access error occurs,
* this method is called on a closed <code>Statement</code> or the
* elements of the <code>String</code> array passed to this
* method are not valid column names
* @throws SQLFeatureNotSupportedException if the JDBC driver does not support this method
* @see #getResultSet
* @see #getUpdateCount
* @see #getMoreResults
* @see #getGeneratedKeys
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized boolean execute(
String sql, String[] columnNames) throws SQLException {
if (columnNames == null || columnNames.length == 0) {
throw Util.invalidArgument("columnIndexes");
}
fetchResult(sql, StatementTypes.RETURN_ANY,
Statement.RETURN_GENERATED_KEYS, null, columnNames);
return resultIn.isData();
}
//#endif JAVA4
/**
* <!-- start generic documentation -->
* Retrieves the result set holdability for <code>ResultSet</code> objects
* generated by this <code>Statement</code> object.
* <!-- end generic documentation -->
*
* <!-- start release-specific documentation -->
* <div class="ReleaseSpecificDocumentation">
* <h3>HSQLDB-Specific Information:</h3> <p>
*
* Starting with 1.7.2, this method returns HOLD_CURSORS_OVER_COMMIT
* </div>
* <!-- end release-specific documentation -->
*
* @return either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
* <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
* @exception SQLException if a database access error occurs or
* this method is called on a closed <code>Statement</code>
* @since JDK 1.4, HSQLDB 1.7
*/
//#ifdef JAVA4
public synchronized int getResultSetHoldability() throws SQLException {
return ResultProperties.getJDBCHoldability(rsProperties);
}
//#endif JAVA4
//----------------------------- JDBC 4.0 -----------------------------------
/**
* Retrieves whether this <code>Statement</code> object has been closed. A <code>Statement</code> is closed if the
* method close has been called on it, or if it is automatically closed.
* @return true if this <code>Statement</code> object is closed; false if it is still open
* @throws SQLException if a database access error occurs
* @since JDK 1.6, HSQLDB 2.0
*/
public synchronized boolean isClosed() throws SQLException {
return isClosed;
}
// --------------------------- Added: Mustang Build 81 -------------------------
boolean poolable = false;
/**
* Requests that a <code>Statement</code> be pooled or not pooled. The value
* specified is a hint to the statement pool implementation indicating
* whether the applicaiton wants the statement to be pooled. It is up to
* the statement pool manager as to whether the hint is used.
* <p>
* The poolable value of a statement is applicable to both internal
* statement caches implemented by the driver and external statement caches
* implemented by application servers and other applications.
* <p>
* By default, a <code>Statement</code> is not poolable when created, and
* a <code>PreparedStatement</code> and <code>CallableStatement</code>
* are poolable when created.
* <p>
* @param poolable requests that the statement be pooled if true and
* that the statement not be pooled if false
* <p>
* @throws SQLException if this method is called on a closed
* <code>Statement</code>
* <p>
* @since JDK 1.6 Build 81, HSQLDB 2.0
*/
//#ifdef JAVA6
public synchronized void setPoolable(
boolean poolable) throws SQLException {
checkClosed();
this.poolable = poolable;
}
//#endif JAVA6
/**
* Returns a value indicating whether the <code>Statement</code>
* is poolable or not.
* <p>
* @return <code>true</code> if the <code>Statement</code>
* is poolable; <code>false</code> otherwise
* @throws SQLException if this method is called on a closed
* <code>Statement</code>
* <p>
* @since JDK 1.6 Build 81, HSQLDB 2.0
* <p>
* @see #setPoolable(boolean) setPoolable(boolean)
*/
//#ifdef JAVA6
public synchronized boolean isPoolable() throws SQLException {
checkClosed();
return this.poolable;
}
//#endif JAVA6
// ------------------- java.sql.Wrapper implementation ---------------------
/**
* Returns an object that implements the given interface to allow access to
* non-standard methods, or standard methods not exposed by the proxy.
*
* If the receiver implements the interface then the result is the receiver
* or a proxy for the receiver. If the receiver is a wrapper
* and the wrapped object implements the interface then the result is the
* wrapped object or a proxy for the wrapped object. Otherwise return the
* the result of calling <code>unwrap</code> recursively on the wrapped object
* or a proxy for that result. If the receiver is not a
* wrapper and does not implement the interface, then an <code>SQLException</code> is thrown.
*
* @param iface A Class defining an interface that the result must implement.
* @return an object that implements the interface. May be a proxy for the actual implementing object.
* @throws java.sql.SQLException If no object found that implements the interface
* @since JDK 1.6, HSQLDB 2.0
*/
//#ifdef JAVA6
@SuppressWarnings("unchecked")
public <T>T unwrap(Class<T> iface) throws java.sql.SQLException {
if (isWrapperFor(iface)) {
return (T) this;
}
throw Util.invalidArgument("iface: " + iface);
}
//#endif JAVA6
/**
* Returns true if this either implements the interface argument or is directly or indirectly a wrapper
* for an object that does. Returns false otherwise. If this implements the interface then return true,
* else if this is a wrapper then return the result of recursively calling <code>isWrapperFor</code> on the wrapped
* object. If this does not implement the interface and is not a wrapper, return false.
* This method should be implemented as a low-cost operation compared to <code>unwrap</code> so that
* callers can use this method to avoid expensive <code>unwrap</code> calls that may fail. If this method
* returns true then calling <code>unwrap</code> with the same argument should succeed.
*
* @param iface a Class defining an interface.
* @return true if this implements the interface or directly or indirectly wraps an object that does.
* @throws java.sql.SQLException if an error occurs while determining whether this is a wrapper
* for an object with the given interface.
* @since JDK 1.6, HSQLDB 2.0
*/
//#ifdef JAVA6
public boolean isWrapperFor(
java.lang.Class<?> iface) throws java.sql.SQLException {
return (iface != null && iface.isAssignableFrom(this.getClass()));
}
//#endif JAVA6
// -------------------- Internal Implementation ----------------------------
/**
* Constructs a new JDBCStatement with the specified connection and result
* type.
*
* @param c the connection on which this statement will execute
* @param resultSetConcurrency int
* @param resultSetHoldability int
*/
JDBCStatement(JDBCConnection c, int props) {
resultOut = Result.newExecuteDirectRequest();
connection = c;
connectionIncarnation = connection.incarnation;
rsProperties = props;
}
/**
* Internal result producer for JDBCStatement (sqlExecDirect mode).
*
* <p>
*
* @param sql a character sequence representing the SQL to be executed
* @param statementRetType int
* @param generatedKeys int
* @param generatedIndexes int[]
* @param generatedNames String[]
* @throws SQLException when a database access error occurs
*/
private void fetchResult(String sql, int statementRetType,
int generatedKeys, int[] generatedIndexes,
String[] generatedNames) throws SQLException {
checkClosed();
closeResultData();
if (isEscapeProcessing) {
sql = connection.nativeSQL(sql);
}
resultOut.setPrepareOrExecuteProperties(sql, maxRows, fetchSize,
statementRetType, queryTimeout, rsProperties, generatedKeys,
generatedIndexes, generatedNames);
try {
resultIn = connection.sessionProxy.execute(resultOut);
performPostExecute();
} catch (HsqlException e) {
throw Util.sqlException(e);
}
if (resultIn.isError()) {
throw Util.sqlException(resultIn);
}
}
}