/*
* 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.LockMode;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.dialect.lock.OptimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.OptimisticLockingStrategy;
import org.hibernate.dialect.lock.PessimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.PessimisticReadUpdateLockingStrategy;
import org.hibernate.dialect.lock.PessimisticWriteUpdateLockingStrategy;
import org.hibernate.dialect.lock.SelectLockingStrategy;
import org.hibernate.dialect.lock.UpdateLockingStrategy;
import org.hibernate.persister.entity.Lockable;
import org.hibernate.sql.CaseFragment;
import org.hibernate.sql.MckoiCaseFragment;
import org.hibernate.type.StandardBasicTypes;
/**
* An SQL dialect compatible with McKoi SQL
*
* @author Doug Currie
* @author Gabe Hicks
*/
public class MckoiDialect extends Dialect {
public MckoiDialect() {
super();
registerColumnType( Types.BIT, "bit" );
registerColumnType( Types.BIGINT, "bigint" );
registerColumnType( Types.SMALLINT, "smallint" );
registerColumnType( Types.TINYINT, "tinyint" );
registerColumnType( Types.INTEGER, "integer" );
registerColumnType( Types.CHAR, "char(1)" );
registerColumnType( Types.VARCHAR, "varchar($l)" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.DOUBLE, "double" );
registerColumnType( Types.DATE, "date" );
registerColumnType( Types.TIME, "time" );
registerColumnType( Types.TIMESTAMP, "timestamp" );
registerColumnType( Types.VARBINARY, "varbinary" );
registerColumnType( Types.NUMERIC, "numeric" );
registerColumnType( Types.BLOB, "blob" );
registerColumnType( Types.CLOB, "clob" );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "sqrt", new StandardSQLFunction("sqrt", StandardBasicTypes.DOUBLE) );
registerFunction( "abs", new StandardSQLFunction("abs") );
registerFunction( "sign", new StandardSQLFunction( "sign", StandardBasicTypes.INTEGER ) );
registerFunction( "round", new StandardSQLFunction( "round", StandardBasicTypes.INTEGER ) );
registerFunction( "mod", new StandardSQLFunction( "mod", StandardBasicTypes.INTEGER ) );
registerFunction( "least", new StandardSQLFunction("least") );
registerFunction( "greatest", new StandardSQLFunction("greatest") );
registerFunction( "user", new StandardSQLFunction( "user", StandardBasicTypes.STRING ) );
registerFunction( "concat", new StandardSQLFunction( "concat", StandardBasicTypes.STRING ) );
getDefaultProperties().setProperty(Environment.STATEMENT_BATCH_SIZE, NO_BATCH);
}
public String getAddColumnString() {
return "add column";
}
public String getSequenceNextValString(String sequenceName) {
return "select " + getSelectSequenceNextValString( sequenceName );
}
public String getSelectSequenceNextValString(String sequenceName) {
return "nextval('" + sequenceName + "')";
}
public String getCreateSequenceString(String sequenceName) {
return "create sequence " + sequenceName;
}
public String getDropSequenceString(String sequenceName) {
return "drop sequence " + sequenceName;
}
public String getForUpdateString() {
return "";
}
public boolean supportsSequences() {
return true;
}
public CaseFragment createCaseFragment() {
return new MckoiCaseFragment();
}
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
// Mckoi has no known variation of a "SELECT ... FOR UPDATE" syntax...
if ( lockMode==LockMode.PESSIMISTIC_FORCE_INCREMENT) {
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.PESSIMISTIC_WRITE) {
return new PessimisticWriteUpdateLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.PESSIMISTIC_READ) {
return new PessimisticReadUpdateLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.OPTIMISTIC) {
return new OptimisticLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.OPTIMISTIC_FORCE_INCREMENT) {
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode);
}
else if ( lockMode.greaterThan( LockMode.READ ) ) {
return new UpdateLockingStrategy( lockable, lockMode );
}
else {
return new SelectLockingStrategy( lockable, lockMode );
}
}
}