/*
 * 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.
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 * 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.
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 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
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package org.hibernate.dialect;

import java.sql.SQLException;
import java.sql.Types;
import java.util.Locale;

import org.hibernate.MappingException;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.dialect.unique.InformixUniqueDelegate;
import org.hibernate.dialect.unique.UniqueDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.internal.util.JdbcExceptionHelper;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.type.StandardBasicTypes;

Informix dialect.

Seems to work with Informix Dynamic Server Version 7.31.UD3, Informix JDBC driver version 2.21JC3.
Author:Steve Molitor
/** * 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 { private final UniqueDelegate uniqueDelegate;
Creates new InformixDialect instance. Sets up the JDBC / Informix type mappings.
/** * Creates new <code>InformixDialect</code> instance. Sets up the JDBC / * Informix type mappings. */
public InformixDialect() { super(); registerColumnType( Types.BIGINT, "int8" ); registerColumnType( Types.BINARY, "byte" ); // Informix doesn't have a bit type registerColumnType( Types.BIT, "smallint" ); registerColumnType( Types.CHAR, "char($l)" ); registerColumnType( Types.DATE, "date" ); registerColumnType( Types.DECIMAL, "decimal" ); registerColumnType( Types.DOUBLE, "float" ); registerColumnType( Types.FLOAT, "smallfloat" ); registerColumnType( Types.INTEGER, "integer" ); // or BYTE registerColumnType( Types.LONGVARBINARY, "blob" ); // or TEXT? registerColumnType( Types.LONGVARCHAR, "clob" ); // or MONEY registerColumnType( Types.NUMERIC, "decimal" ); registerColumnType( Types.REAL, "smallfloat" ); registerColumnType( Types.SMALLINT, "smallint" ); registerColumnType( Types.TIMESTAMP, "datetime year to fraction(5)" ); registerColumnType( Types.TIME, "datetime hour to second" ); registerColumnType( Types.TINYINT, "smallint" ); registerColumnType( Types.VARBINARY, "byte" ); registerColumnType( Types.VARCHAR, "varchar($l)" ); registerColumnType( Types.VARCHAR, 255, "varchar($l)" ); registerColumnType( Types.VARCHAR, 32739, "lvarchar($l)" ); registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "(", "||", ")" ) ); uniqueDelegate = new InformixUniqueDelegate( this ); } @Override public String getAddColumnString() { return "add"; } @Override public boolean supportsIdentityColumns() { return true; } @Override public String getIdentitySelectString(String table, String column, int type) throws MappingException { return type == Types.BIGINT ? "select dbinfo('serial8') from informix.systables where tabid=1" : "select dbinfo('sqlca.sqlerrd1') from informix.systables where tabid=1"; } @Override public String getIdentityColumnString(int type) throws MappingException { return type == Types.BIGINT ? "serial8 not null" : "serial not null"; } @Override public boolean hasDataTypeInIdentityColumn() { return false; }
Informix constraint name must be at the end.

{@inheritDoc}
/** * Informix constraint name must be at the end. * <p/> * {@inheritDoc} */
@Override public String getAddForeignKeyConstraintString( String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey) { final StringBuilder result = new StringBuilder( 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(); }
Informix constraint name must be at the end.

{@inheritDoc}
/** * Informix constraint name must be at the end. * <p/> * {@inheritDoc} */
@Override public String getAddPrimaryKeyConstraintString(String constraintName) { return " add constraint primary key constraint " + constraintName + " "; } @Override public String getCreateSequenceString(String sequenceName) { return "create sequence " + sequenceName; } @Override public String getDropSequenceString(String sequenceName) { return "drop sequence " + sequenceName + " restrict"; } @Override public String getSequenceNextValString(String sequenceName) { return "select " + getSelectSequenceNextValString( sequenceName ) + " from informix.systables where tabid=1"; } @Override public String getSelectSequenceNextValString(String sequenceName) { return sequenceName + ".nextval"; } @Override public boolean supportsSequences() { return true; } @Override public boolean supportsPooledSequences() { return true; } @Override public String getQuerySequencesString() { return "select tabname from informix.systables where tabtype='Q'"; } @Override public boolean supportsLimit() { return true; } @Override public boolean useMaxForLimit() { return true; } @Override public boolean supportsLimitOffset() { return false; } @Override public String getLimitString(String querySelect, int offset, int limit) { if ( offset > 0 ) { throw new UnsupportedOperationException( "query result offset is not supported" ); } return new StringBuilder( querySelect.length() + 8 ) .append( querySelect ) .insert( querySelect.toLowerCase(Locale.ROOT).indexOf( "select" ) + 6, " first " + limit ) .toString(); } @Override public boolean supportsVariableLimit() { return false; } @Override public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() { return EXTRACTER; } private static final ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() { @Override public String extractConstraintName(SQLException sqle) { String constraintName = null; final int errorCode = JdbcExceptionHelper.extractErrorCode( sqle ); if ( errorCode == -268 ) { constraintName = extractUsingTemplate( "Unique constraint (", ") violated.", sqle.getMessage() ); } else if ( errorCode == -691 ) { constraintName = extractUsingTemplate( "Missing key in referenced table for referential constraint (", ").", sqle.getMessage() ); } else if ( errorCode == -692 ) { constraintName = extractUsingTemplate( "Key value for constraint (", ") is still being referenced.", sqle.getMessage() ); } if ( constraintName != null ) { // strip table-owner because Informix always returns constraint names as "<table-owner>.<constraint-name>" final int i = constraintName.indexOf( '.' ); if ( i != -1 ) { constraintName = constraintName.substring( i + 1 ); } } return constraintName; } }; @Override public boolean supportsCurrentTimestampSelection() { return true; } @Override public boolean isCurrentTimestampSelectStringCallable() { return false; } @Override public String getCurrentTimestampSelectString() { return "select distinct current timestamp from informix.systables"; } @Override public boolean supportsTemporaryTables() { return true; } @Override public String getCreateTemporaryTableString() { return "create temp table"; } @Override public String getCreateTemporaryTablePostfix() { return "with no log"; } @Override public UniqueDelegate getUniqueDelegate() { return uniqueDelegate; } }