Hibernate example source code file (InterbaseDialect.java)

This example Hibernate source code file (InterbaseDialect.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

current_timestamp, database, dialect, generator_name, generator_name, generators, generators, interbasedialect, jdbc, no_batch, rdb, rdb, sql, string, string, varargssqlfunction

The Hibernate InterbaseDialect.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.dialect;
import java.sql.Types;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StandardBasicTypes;

/**
 * An SQL dialect for Interbase.
 *
 * @author Gavin King
 */
public class InterbaseDialect extends Dialect {

	public InterbaseDialect() {
		super();
		registerColumnType( Types.BIT, "smallint" );
		registerColumnType( Types.BIGINT, "numeric(18,0)" );
		registerColumnType( Types.SMALLINT, "smallint" );
		registerColumnType( Types.TINYINT, "smallint" );
		registerColumnType( Types.INTEGER, "integer" );
		registerColumnType( Types.CHAR, "char(1)" );
		registerColumnType( Types.VARCHAR, "varchar($l)" );
		registerColumnType( Types.FLOAT, "float" );
		registerColumnType( Types.DOUBLE, "double precision" );
		registerColumnType( Types.DATE, "date" );
		registerColumnType( Types.TIME, "time" );
		registerColumnType( Types.TIMESTAMP, "timestamp" );
		registerColumnType( Types.VARBINARY, "blob" );
		registerColumnType( Types.NUMERIC, "numeric($p,$s)" );
		registerColumnType( Types.BLOB, "blob" );
		registerColumnType( Types.CLOB, "blob sub_type 1" );
		
		registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "(","||",")" ) );

		getDefaultProperties().setProperty(Environment.STATEMENT_BATCH_SIZE, NO_BATCH);
	}

	public String getAddColumnString() {
		return "add";
	}

	public String getSequenceNextValString(String sequenceName) {
		return "select " + getSelectSequenceNextValString( sequenceName ) + " from RDB$DATABASE";
	}

	public String getSelectSequenceNextValString(String sequenceName) {
		return "gen_id( " + sequenceName + ", 1 )";
	}

	public String getCreateSequenceString(String sequenceName) {
		return "create generator " + sequenceName;
	}

	public String getDropSequenceString(String sequenceName) {
		return "delete from RDB$GENERATORS where RDB$GENERATOR_NAME = '" + sequenceName.toUpperCase() + "'";
	}

	public String getQuerySequencesString() {
		return "select RDB$GENERATOR_NAME from RDB$GENERATORS";
	}
	
	public String getForUpdateString() {
		return " with lock";
	}
	public String getForUpdateString(String aliases) {
		return " for update of " + aliases + " with lock";
	}

	public boolean supportsSequences() {
		return true;
	}

	public boolean supportsLimit() {
		return true;
	}

	public String getLimitString(String sql, boolean hasOffset) {
		return new StringBuilder( sql.length()+15 )
			.append(sql)
			.append(hasOffset ? " rows ? to ?" : " rows ?")
			.toString();
	}

	public boolean bindLimitParametersFirst() {
		return false;
	}

	public boolean bindLimitParametersInReverseOrder() {
		return false;
	}

	public String getCurrentTimestampCallString() {
		// TODO : not sure which (either?) is correct, could not find docs on how to do this.
		// did find various blogs and forums mentioning that select CURRENT_TIMESTAMP
		// does not work...
		return "{?= call CURRENT_TIMESTAMP }";
//		return "select CURRENT_TIMESTAMP from RDB$DATABASE";
	}

	public boolean isCurrentTimestampSelectStringCallable() {
		return true;
	}
}