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jeremybenn |
/* Connection.java -- Manage a database connection.
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Copyright (C) 1999, 2000, 2002, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.sql;
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import java.util.Map;
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/**
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* This interface provides methods for managing a connection to a database.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public interface Connection
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{
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/**
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* This transaction isolation level indicates that transactions are not
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* supported.
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*/
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int TRANSACTION_NONE = 0;
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/**
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* This transaction isolation level indicates that one transaction can
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* read modifications by other transactions before the other transactions
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* have committed their changes. This could result in invalid reads.
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*/
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int TRANSACTION_READ_UNCOMMITTED = 1;
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/**
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* This transaction isolation level indicates that only committed data from
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* other transactions will be read. If a transaction reads a row, then
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* another transaction commits a change to that row, the first transaction
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* would retrieve the changed row on subsequent reads of the same row.
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*/
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int TRANSACTION_READ_COMMITTED = 2;
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/**
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* This transaction isolation level indicates that only committed data from
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* other transactions will be read. It also ensures that data read from
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* a row will not be different on a subsequent read even if another
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* transaction commits a change.
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*/
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int TRANSACTION_REPEATABLE_READ = 4;
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/**
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* This transaction isolation level indicates that only committed data from
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* other transactions will be read. It also ensures that data read from
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* a row will not be different on a subsequent read even if another
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* transaction commits a change. Additionally, rows modified by other
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* transactions will not affect the result set returned during subsequent
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* executions of the same WHERE clause in this transaction.
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*/
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int TRANSACTION_SERIALIZABLE = 8;
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/**
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* This method creates a new SQL statement. The default result set type
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* and concurrency will be used.
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*
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* @return A new <code>Statement</code> object.
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* @exception SQLException If an error occurs.
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* @see Statement
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*/
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Statement createStatement() throws SQLException;
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/**
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* This method creates a new <code>PreparedStatement</code> for the specified
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* SQL string. This method is designed for use with parameterized
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* statements. The default result set type and concurrency will be used.
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*
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* @param sql The SQL statement to use in creating this
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* <code>PreparedStatement</code>.
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* @return A new <code>PreparedStatement</code>.
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* @exception SQLException If an error occurs.
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* @see PreparedStatement
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*/
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PreparedStatement prepareStatement(String sql) throws SQLException;
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/**
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* This method creates a new <code>CallableStatement</code> for the
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* specified SQL string. Thie method is designed to be used with
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* stored procedures. The default result set type and concurrency
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* will be used.
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*
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* @param sql The SQL statement to use in creating this
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* <code>CallableStatement</code>.
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* @return A new <code>CallableStatement</code>.
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* @exception SQLException If an error occurs.
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* @see CallableStatement
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*/
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CallableStatement prepareCall(String sql) throws SQLException;
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/**
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* This method converts the specified generic SQL statement into the
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* native grammer of the database this object is connected to.
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*
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* @param sql The JDBC generic SQL statement.
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* @return The native SQL statement.
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* @exception SQLException If an error occurs.
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*/
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String nativeSQL(String sql) throws SQLException;
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/**
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* This method turns auto commit mode on or off. In auto commit mode,
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* every SQL statement is committed its own transaction. Otherwise a
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* transaction must be explicitly committed or rolled back.
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*
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* @param autoCommit <code>true</code> to enable auto commit mode,
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* <code>false</code> to disable it.
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* @exception SQLException If an error occurs.
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* @see #commit()
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* @see #rollback()
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*/
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void setAutoCommit(boolean autoCommit) throws SQLException;
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/**
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* This method tests whether or not auto commit mode is currently enabled.
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* In auto commit mode, every SQL statement is committed its own transaction.
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* Otherwise a transaction must be explicitly committed or rolled back.
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*
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* @return <code>true</code> if auto commit mode is enabled,
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* <code>false</code> otherwise.
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* @exception SQLException If an error occurs.
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* @see #commit()
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* @see #rollback()
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*/
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boolean getAutoCommit() throws SQLException;
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/**
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* This method commits any SQL statements executed on this connection since
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* the last commit or rollback.
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*
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* @exception SQLException If an error occurs.
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*/
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void commit() throws SQLException;
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/**
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* This method rolls back any SQL statements executed on this connection
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* since the last commit or rollback.
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*
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* @exception SQLException If an error occurs.
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*/
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void rollback() throws SQLException;
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/**
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* This method immediately closes this database connection.
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*
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* @exception SQLException If an error occurs.
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*/
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void close() throws SQLException;
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/**
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* This method tests whether or not this connection has been closed.
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*
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* @return <code>true</code> if the connection is closed, <code>false</code>
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* otherwise.
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* @exception SQLException If an error occurs.
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*/
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boolean isClosed() throws SQLException;
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/**
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* This method returns the meta data for this database connection.
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*
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* @return The meta data for this database.
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* @exception SQLException If an error occurs.
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* @see DatabaseMetaData
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*/
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DatabaseMetaData getMetaData() throws SQLException;
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/**
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* This method turns read only mode on or off. It may not be called while
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* a transaction is in progress.
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*
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* @param readOnly <code>true</code> if this connection is read only,
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* <code>false</code> otherwise.
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* @exception SQLException If an error occurs.
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*/
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void setReadOnly(boolean readOnly) throws SQLException;
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/**
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* This method tests whether or not this connection is in read only mode.
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*
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* @return <code>true</code> if the connection is read only <code>false</code>
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* otherwise.
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* @exception SQLException If an error occurs.
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*/
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boolean isReadOnly() throws SQLException;
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/**
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* This method sets the name of the catalog in use by this connection.
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* Note that this method does nothing if catalogs are not supported by
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* this database.
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*
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* @param catalog The name of the catalog to use for this connection.
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* @exception SQLException If an error occurs.
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*/
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void setCatalog(String catalog) throws SQLException;
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/**
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* This method returns the name of the catalog in use by this connection,
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* if any.
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*
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* @return The name of the catalog, or <code>null</code> if none
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* exists or catalogs are not supported by this database.
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* @exception SQLException If an error occurs.
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*/
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String getCatalog() throws SQLException;
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/**
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* This method sets the current transaction isolation mode. This must
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* be one of the constants defined in this interface.
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*
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* @param level The transaction isolation level.
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* @exception SQLException If an error occurs.
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*/
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void setTransactionIsolation(int level) throws SQLException;
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/**
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* This method returns the current transaction isolation mode. This will
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* be one of the constants defined in this interface.
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*
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* @return The transaction isolation level.
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* @exception SQLException If an error occurs.
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*/
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int getTransactionIsolation() throws SQLException;
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/**
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* This method returns the first warning that occurred on this connection,
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* if any. If there were any subsequence warnings, they will be chained
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* to the first one.
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*
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* @return The first <code>SQLWarning</code> that occurred, or
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* <code>null</code> if there have been no warnings.
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* @exception SQLException If an error occurs.
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*/
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SQLWarning getWarnings() throws SQLException;
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/**
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* This method clears all warnings that have occurred on this connection.
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*
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* @exception SQLException If an error occurs.
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*/
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void clearWarnings() throws SQLException;
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/**
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* This method creates a new SQL statement with the specified type and
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* concurrency. Valid values for these parameters are specified in the
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* <code>ResultSet</code> class.
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*
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* @param resultSetType The type of result set to use for this statement.
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* @param resultSetConcurrency The type of concurrency to be used in
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* the result set for this statement.
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* @return A new <code>Statement</code> object.
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* @exception SQLException If an error occurs.
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* @see Statement
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* @see ResultSet
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*/
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Statement createStatement(int resultSetType, int resultSetConcurrency)
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throws SQLException;
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| 293 |
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/**
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| 295 |
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* This method creates a new <code>PreparedStatement</code> for the specified
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| 296 |
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* SQL string. This method is designed for use with parameterized
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| 297 |
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* statements. The specified result set type and concurrency will be used.
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* Valid values for these parameters are specified in the
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* <code>ResultSet</code> class.
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|
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*
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* @param sql The SQL statement to use in creating this
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* <code>PreparedStatement</code>.
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| 303 |
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* @param resultSetType The type of result set to use for this statement.
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* @param resultSetConcurrency The type of concurrency to be used in
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* the result set for this statement.
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| 306 |
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* @return A new <code>PreparedStatement</code>.
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* @exception SQLException If an error occurs.
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* @see PreparedStatement
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* @see ResultSet
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| 310 |
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*/
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| 311 |
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PreparedStatement prepareStatement(String sql, int resultSetType,
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int resultSetConcurrency) throws SQLException;
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| 313 |
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| 314 |
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/**
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| 315 |
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* This method creates a new <code>CallableStatement</code> for the
|
| 316 |
|
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* specified SQL string. Thie method is designed to be used with
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| 317 |
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* stored procedures. The specified result set type and concurrency
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| 318 |
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* will be used. Valid values for these parameters are specified in the
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| 319 |
|
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* <code>ResultSet</code> class.
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| 320 |
|
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*
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| 321 |
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* @param sql The SQL statement to use in creating this
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| 322 |
|
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* <code>PreparedStatement</code>.
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| 323 |
|
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* @param resultSetType The type of result set to use for this statement.
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| 324 |
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* @param resultSetConcurrency The type of concurrency to be used in
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| 325 |
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* the result set for this statement.
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| 326 |
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* @return A new <code>CallableStatement</code>.
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* @exception SQLException If an error occurs.
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* @see CallableStatement
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| 329 |
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* @see ResultSet
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| 330 |
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*/
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| 331 |
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CallableStatement prepareCall(String sql, int resultSetType, int
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| 332 |
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resultSetConcurrency) throws SQLException;
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| 333 |
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| 334 |
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/**
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| 335 |
|
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* This method returns the mapping of SQL types to Java classes
|
| 336 |
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* currently in use by this connection. This mapping will have no
|
| 337 |
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* entries unless they have been manually added.
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| 338 |
|
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*
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| 339 |
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* @return The SQL type to Java class mapping.
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| 340 |
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* @exception SQLException If an error occurs.
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| 341 |
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*/
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| 342 |
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Map<String, Class<?>> getTypeMap() throws SQLException;
|
| 343 |
|
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|
| 344 |
|
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/**
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| 345 |
|
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* This method sets the mapping table for SQL types to Java classes.
|
| 346 |
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* Any entries in this map override the defaults.
|
| 347 |
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*
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| 348 |
|
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* @param map The new SQL mapping table.
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| 349 |
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* @exception SQLException If an error occurs.
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| 350 |
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*/
|
| 351 |
|
|
void setTypeMap(Map<String, Class<?>> map) throws SQLException;
|
| 352 |
|
|
|
| 353 |
|
|
/**
|
| 354 |
|
|
* Sets the default holdability of <code>ResultSet</code>S that are created
|
| 355 |
|
|
* from <code>Statement</code>S using this <code>Connection</code>.
|
| 356 |
|
|
*
|
| 357 |
|
|
* @param holdability The default holdability value to set, this must be one
|
| 358 |
|
|
* of <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
|
| 359 |
|
|
* <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>.
|
| 360 |
|
|
* @exception SQLException If an error occurs.
|
| 361 |
|
|
* @see ResultSet
|
| 362 |
|
|
* @since 1.4
|
| 363 |
|
|
*/
|
| 364 |
|
|
void setHoldability(int holdability) throws SQLException;
|
| 365 |
|
|
|
| 366 |
|
|
/**
|
| 367 |
|
|
* Gets the default holdability of <code>ResultSet</code>S that are created
|
| 368 |
|
|
* from <code>Statement</code>S using this <code>Connection</code>.
|
| 369 |
|
|
*
|
| 370 |
|
|
* @return The current default holdability value, this must be one of
|
| 371 |
|
|
* <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
|
| 372 |
|
|
* <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>.
|
| 373 |
|
|
* @exception SQLException If an error occurs.
|
| 374 |
|
|
* @see ResultSet
|
| 375 |
|
|
* @since 1.4
|
| 376 |
|
|
*/
|
| 377 |
|
|
int getHoldability() throws SQLException;
|
| 378 |
|
|
|
| 379 |
|
|
/**
|
| 380 |
|
|
* Creates a new unnamed savepoint for this <code>Connection</code>
|
| 381 |
|
|
*
|
| 382 |
|
|
* @return The <code>Savepoint</code> object representing the savepoint.
|
| 383 |
|
|
* @exception SQLException If an error occurs.
|
| 384 |
|
|
* @since 1.4
|
| 385 |
|
|
*/
|
| 386 |
|
|
Savepoint setSavepoint() throws SQLException;
|
| 387 |
|
|
|
| 388 |
|
|
/**
|
| 389 |
|
|
* Creates a new savepoint with the specifiend name for this
|
| 390 |
|
|
* <code>Connection</code>.
|
| 391 |
|
|
*
|
| 392 |
|
|
* @param name The name of the savepoint.
|
| 393 |
|
|
* @return The <code>Savepoint</code> object representing the savepoint.
|
| 394 |
|
|
* @exception SQLException If an error occurs.
|
| 395 |
|
|
* @since 1.4
|
| 396 |
|
|
*/
|
| 397 |
|
|
Savepoint setSavepoint(String name) throws SQLException;
|
| 398 |
|
|
|
| 399 |
|
|
/**
|
| 400 |
|
|
* Undoes all changes made after the specified savepoint was set.
|
| 401 |
|
|
*
|
| 402 |
|
|
* @param savepoint The safepoint to roll back to.
|
| 403 |
|
|
* @exception SQLException If an error occurs.
|
| 404 |
|
|
* @since 1.4
|
| 405 |
|
|
*/
|
| 406 |
|
|
void rollback(Savepoint savepoint) throws SQLException;
|
| 407 |
|
|
|
| 408 |
|
|
/**
|
| 409 |
|
|
* Removes the specified savepoint from this <code>Connection</code>.
|
| 410 |
|
|
* Refering to a savepoint after it was removed is an error and will throw an
|
| 411 |
|
|
* SQLException.
|
| 412 |
|
|
*
|
| 413 |
|
|
* @param savepoint The savepoint to release.
|
| 414 |
|
|
* @exception SQLException If an error occurs.
|
| 415 |
|
|
* @since 1.4
|
| 416 |
|
|
*/
|
| 417 |
|
|
void releaseSavepoint(Savepoint savepoint) throws SQLException;
|
| 418 |
|
|
|
| 419 |
|
|
/**
|
| 420 |
|
|
* This method creates a new SQL statement with the specified type,
|
| 421 |
|
|
* concurrency and holdability, instead of using the defaults. Valid values
|
| 422 |
|
|
* for these parameters are specified in the <code>ResultSet</code> class.
|
| 423 |
|
|
*
|
| 424 |
|
|
* @param resultSetType The type of result set to use for this statement.
|
| 425 |
|
|
* @param resultSetConcurrency The type of concurrency to be used in
|
| 426 |
|
|
* the result set for this statement.
|
| 427 |
|
|
* @param resultSetHoldability The type of holdability to be usd in the
|
| 428 |
|
|
* result set for this statement.
|
| 429 |
|
|
* @return A new <code>Statement</code>
|
| 430 |
|
|
* @exception SQLException If an error occurs.
|
| 431 |
|
|
* @see ResultSet
|
| 432 |
|
|
* @since 1.4
|
| 433 |
|
|
*/
|
| 434 |
|
|
Statement createStatement(int resultSetType, int
|
| 435 |
|
|
resultSetConcurrency, int resultSetHoldability) throws SQLException;
|
| 436 |
|
|
|
| 437 |
|
|
/**
|
| 438 |
|
|
* This method creates a new <code>PreparedStatement</code> for the specified
|
| 439 |
|
|
* SQL string. This method is designed for use with parameterized
|
| 440 |
|
|
* statements. The specified result set type, concurrency and holdability
|
| 441 |
|
|
* will be used. Valid values for these parameters are specified in the
|
| 442 |
|
|
* <code>ResultSet</code> class.
|
| 443 |
|
|
*
|
| 444 |
|
|
* @param sql The SQL statement to use in creating this
|
| 445 |
|
|
* <code>PreparedStatement</code>.
|
| 446 |
|
|
* @param resultSetType The type of result set to use for this statement.
|
| 447 |
|
|
* @param resultSetConcurrency The type of concurrency to be used in
|
| 448 |
|
|
* the result set for this statement.
|
| 449 |
|
|
* @param resultSetHoldability The type of holdability to be usd in the
|
| 450 |
|
|
* result set for this statement.
|
| 451 |
|
|
* @return A new <code>PreparedStatement</code>.
|
| 452 |
|
|
* @exception SQLException If an error occurs.
|
| 453 |
|
|
* @see PreparedStatement
|
| 454 |
|
|
* @see ResultSet
|
| 455 |
|
|
* @since 1.4
|
| 456 |
|
|
*/
|
| 457 |
|
|
PreparedStatement prepareStatement(String sql, int resultSetType, int
|
| 458 |
|
|
resultSetConcurrency, int resultSetHoldability) throws SQLException;
|
| 459 |
|
|
|
| 460 |
|
|
/**
|
| 461 |
|
|
* This method creates a new <code>CallableStatement</code> for the
|
| 462 |
|
|
* specified SQL string. Thie method is designed to be used with
|
| 463 |
|
|
* stored procedures. The specified result set type, concurrency and
|
| 464 |
|
|
* holdability will be used. Valid values for these parameters are specified
|
| 465 |
|
|
* in the <code>ResultSet</code> class.
|
| 466 |
|
|
*
|
| 467 |
|
|
* @param sql The SQL statement to use in creating this
|
| 468 |
|
|
* <code>PreparedStatement</code>.
|
| 469 |
|
|
* @param resultSetType The type of result set to use for this statement.
|
| 470 |
|
|
* @param resultSetConcurrency The type of concurrency to be used in
|
| 471 |
|
|
* the result set for this statement.
|
| 472 |
|
|
* @param resultSetHoldability The type of holdability to be used in the
|
| 473 |
|
|
* result set for this statement.
|
| 474 |
|
|
* @return A new <code>CallableStatement</code>.
|
| 475 |
|
|
* @exception SQLException If an error occurs.
|
| 476 |
|
|
* @see CallableStatement
|
| 477 |
|
|
* @see ResultSet
|
| 478 |
|
|
* @since 1.4
|
| 479 |
|
|
*/
|
| 480 |
|
|
CallableStatement prepareCall(String sql, int resultSetType, int
|
| 481 |
|
|
resultSetConcurrency, int resultSetHoldability) throws SQLException;
|
| 482 |
|
|
|
| 483 |
|
|
/**
|
| 484 |
|
|
* @since 1.4
|
| 485 |
|
|
*/
|
| 486 |
|
|
PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
|
| 487 |
|
|
throws SQLException;
|
| 488 |
|
|
|
| 489 |
|
|
/**
|
| 490 |
|
|
* @since 1.4
|
| 491 |
|
|
*/
|
| 492 |
|
|
PreparedStatement prepareStatement(String sql, int[] columnIndexes)
|
| 493 |
|
|
throws SQLException;
|
| 494 |
|
|
|
| 495 |
|
|
/**
|
| 496 |
|
|
* @since 1.4
|
| 497 |
|
|
*/
|
| 498 |
|
|
PreparedStatement prepareStatement(String sql, String[] columnNames)
|
| 499 |
|
|
throws SQLException;
|
| 500 |
|
|
}
|
