gt: 			else if ( errorCode == -691 ) {
context: /*
   * Hibernate, Relational Persistence for Idiomatic Java
   *
   * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
   *
   * 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.SQLException;
  import java.sql.Types;
  
  import org.hibernate.MappingException;
  import org.hibernate.Hibernate;
  import org.hibernate.dialect.function.VarArgsSQLFunction;
  import org.hibernate.exception.JDBCExceptionHelper;
  import org.hibernate.exception.TemplatedViolatedConstraintNameExtracter;
  import org.hibernate.exception.ViolatedConstraintNameExtracter;
  import org.hibernate.util.StringHelper;
  
  /**
   * Informix dialect.<br>
   * <br>
   * Seems to work with Informix Dynamic Server Version 7.31.UD3,
   * Informix JDBC driver version 2.21JC3.
   * @author Steve Molitor
   */
  public class InformixDialect extends Dialect {
  
  	/**
  	 * Creates new <code>InformixDialect</code> instance. Sets up the JDBC /
  	 * Informix type mappings.
  	 */
  	public InformixDialect() {
  		super();
  
  		registerColumnType(Types.BIGINT, "int8");
  		registerColumnType(Types.BINARY, "byte");
  		registerColumnType(Types.BIT, "smallint"); // Informix doesn't have a bit type
  		registerColumnType(Types.CHAR, "char($l)");
  		registerColumnType(Types.DATE, "date");
  		registerColumnType(Types.DECIMAL, "decimal");
          registerColumnType(Types.DOUBLE, "float");
          registerColumnType(Types.FLOAT, "smallfloat");
  		registerColumnType(Types.INTEGER, "integer");
  		registerColumnType(Types.LONGVARBINARY, "blob"); // or BYTE
  		registerColumnType(Types.LONGVARCHAR, "clob"); // or TEXT?
  		registerColumnType(Types.NUMERIC, "decimal"); // or MONEY
  		registerColumnType(Types.REAL, "smallfloat");
  		registerColumnType(Types.SMALLINT, "smallint");
  		registerColumnType(Types.TIMESTAMP, "datetime year to fraction(5)");
  		registerColumnType(Types.TIME, "datetime hour to second");
  		registerColumnType(Types.TINYINT, "smallint");
  		registerColumnType(Types.VARBINARY, "byte");
  		registerColumnType(Types.VARCHAR, "varchar($l)");
  		registerColumnType(Types.VARCHAR, 255, "varchar($l)");
  		registerColumnType(Types.VARCHAR, 32739, "lvarchar($l)");
  
  		registerFunction( "concat", new VarArgsSQLFunction( Hibernate.STRING, "(", "||", ")" ) );
  	}
  
  	public String getAddColumnString() {
  		return "add";
  	}
  
  	public boolean supportsIdentityColumns() {
  		return true;
  	}
  
  	public String getIdentitySelectString(String table, String column, int type) 
  	throws MappingException {
  		return type==Types.BIGINT ?
  			"select dbinfo('serial8') from systables where tabid=1" :
  			"select dbinfo('sqlca.sqlerrd1') from systables where tabid=1";
  	}
  
  	public String getIdentityColumnString(int type) throws MappingException {
  		return type==Types.BIGINT ?
  			"serial8 not null" :
  			"serial not null";
  	}
  
  	public boolean hasDataTypeInIdentityColumn() {
  		return false;
  	}
  
  	/**
  	 * The syntax used to add a foreign key constraint to a table.
  	 * Informix constraint name must be at the end.
  	 * @return String
  	 */
  	public String getAddForeignKeyConstraintString(
  			String constraintName,
  			String[] foreignKey,
  			String referencedTable,
  			String[] primaryKey,
  			boolean referencesPrimaryKey) {
  		StringBuffer result = new StringBuffer( 30 )
  				.append( " add constraint " )
  				.append( " foreign key (" )
  				.append( StringHelper.join( ", ", foreignKey ) )
  				.append( ") references " )
  				.append( referencedTable );
  
  		if ( !referencesPrimaryKey ) {
  			result.append( " (" )
  					.append( StringHelper.join( ", ", primaryKey ) )
  					.append( ')' );
  		}
  
  		result.append( " constraint " ).append( constraintName );
  
  		return result.toString();
  	}
  
  	/**
  	 * The syntax used to add a primary key constraint to a table.
  	 * Informix constraint name must be at the end.
  	 * @return String
  	 */
  	public String getAddPrimaryKeyConstraintString(String constraintName) {
  		return " add constraint primary key constraint " + constraintName + " ";
  	}
  
  	public String getCreateSequenceString(String sequenceName) {
  		return "create sequence " + sequenceName;
  	}
  	public String getDropSequenceString(String sequenceName) {
  		return "drop sequence " + sequenceName + " restrict";
  	}
  
  	public String getSequenceNextValString(String sequenceName) {
  		return "select " + getSelectSequenceNextValString( sequenceName ) + " from systables where tabid=1";
  	}
  
  	public String getSelectSequenceNextValString(String sequenceName) {
  		return sequenceName + ".nextval";
  	}
  
  	public boolean supportsSequences() {
  		return true;
  	}
  
  	public boolean supportsLimit() {
  		return true;
  	}
  
  	public boolean useMaxForLimit() {
  		return true;
  	}
  
  	public boolean supportsLimitOffset() {
  		return false;
  	}
  
  	public String getLimitString(String querySelect, int offset, int limit) {
  		if ( offset > 0 ) {
  			throw new UnsupportedOperationException( "query result offset is not supported" );
  		}
  		return new StringBuffer( querySelect.length() + 8 )
  				.append( querySelect )
  				.insert( querySelect.toLowerCase().indexOf( "select" ) + 6, " first " + limit )
  				.toString();
  	}
  
  	public boolean supportsVariableLimit() {
  		return false;
  	}
  
  	public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
          return EXTRACTER;
  	}
  
  	private static ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
  
  		/**
  		 * Extract the name of the violated constraint from the given SQLException.
  		 *
  		 * @param sqle The exception that was the result of the constraint violation.
  		 * @return The extracted constraint name.
  		 */
  		public String extractConstraintName(SQLException sqle) {
  			String constraintName = null;
  			
  			int errorCode = JDBCExceptionHelper.extractErrorCode(sqle);
  			if ( errorCode == -268 ) {
  				constraintName = extractUsingTemplate( "Unique constraint (", ") violated.", sqle.getMessage() );
  			}
  