/*
* 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.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
//import org.hibernate.cfg.Environment;
//import org.hibernate.type.StandardBasicTypes;
/**
* An abstract base class for Sybase and MS SQL Server dialects.
*
* @author Gavin King
*/
abstract class AbstractTransactSQLDialect extends Dialect {
public AbstractTransactSQLDialect() {
super();
registerColumnType( Types.BINARY, "binary($l)" );
registerColumnType( Types.BIT, "tinyint" );
registerColumnType( Types.BIGINT, "numeric(19,0)" );
registerColumnType( Types.SMALLINT, "smallint" );
registerColumnType( Types.TINYINT, "smallint" );
registerColumnType( Types.INTEGER, "int" );
registerColumnType( Types.CHAR, "char(1)" );
registerColumnType( Types.VARCHAR, "varchar($l)" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.DOUBLE, "double precision" );
registerColumnType( Types.DATE, "datetime" );
registerColumnType( Types.TIME, "datetime" );
registerColumnType( Types.TIMESTAMP, "datetime" );
registerColumnType( Types.VARBINARY, "varbinary($l)" );
registerColumnType( Types.NUMERIC, "numeric($p,$s)" );
registerColumnType( Types.BLOB, "image" );
registerColumnType( Types.CLOB, "text" );
// getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, NO_BATCH );
}
@Override
public String getAddColumnString() {
return "add";
}
@Override
public String getNullColumnString() {
return "";
}
@Override
public boolean qualifyIndexName() {
return false;
}
@Override
public String getForUpdateString() {
return "";
}
@Override
public boolean supportsIdentityColumns() {
return true;
}
@Override
public String getIdentitySelectString() {
return "select @@identity";
}
@Override
public String getIdentityColumnString() {
//starts with 1, implicitly
return "identity not null";
}
@Override
public boolean supportsInsertSelectIdentity() {
return true;
}
@Override
public String appendIdentitySelectToInsert(String insertSQL) {
return insertSQL + "\nselect @@identity";
}
@Override
public String appendLockHint(LockOptions lockOptions, String tableName) {
return lockOptions.getLockMode().greaterThan( LockMode.READ ) ? tableName + " holdlock" : tableName;
}
//
// @Override
// public String applyLocksToSql(String sql, LockOptions aliasedLockOptions, Map<String, String[]> keyColumnNames) {
// // TODO: merge additional lockoptions support in Dialect.applyLocksToSql
// final Iterator itr = aliasedLockOptions.getAliasLockIterator();
// final StringBuilder buffer = new StringBuilder( sql );
// int correction = 0;
// while ( itr.hasNext() ) {
// final Map.Entry entry = (Map.Entry) itr.next();
// final LockMode lockMode = (LockMode) entry.getValue();
// if ( lockMode.greaterThan( LockMode.READ ) ) {
// final String alias = (String) entry.getKey();
// int start = -1;
// int end = -1;
// if ( sql.endsWith( " " + alias ) ) {
// start = ( sql.length() - alias.length() ) + correction;
// end = start + alias.length();
// }
// else {
// int position = sql.indexOf( " " + alias + " " );
// if ( position <= -1 ) {
// position = sql.indexOf( " " + alias + "," );
// }
// if ( position > -1 ) {
// start = position + correction + 1;
// end = start + alias.length();
// }
// }
//
// if ( start > -1 ) {
// final String lockHint = appendLockHint( lockMode, alias );
// buffer.replace( start, end, lockHint );
// correction += ( lockHint.length() - alias.length() );
// }
// }
// }
// return buffer.toString();
// }
@Override
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
// sql server just returns automatically
return col;
}
@Override
public ResultSet getResultSet(CallableStatement ps) throws SQLException {
boolean isResultSet = ps.execute();
// This assumes you will want to ignore any update counts
while ( !isResultSet && ps.getUpdateCount() != -1 ) {
isResultSet = ps.getMoreResults();
}
// You may still have other ResultSets or update counts left to process here
// but you can't do it now or the ResultSet you just got will be closed
return ps.getResultSet();
}
@Override
public boolean supportsCurrentTimestampSelection() {
return true;
}
@Override
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
@Override
public String getCurrentTimestampSelectString() {
return "select getdate()";
}
@Override
public boolean supportsTemporaryTables() {
return true;
}
@Override
public String generateTemporaryTableName(String baseTableName) {
return "#" + baseTableName;
}
@Override
public boolean dropTemporaryTableAfterUse() {
// sql-server, at least needed this dropped after use; strange!
return true;
}
@Override
public String getSelectGUIDString() {
return "select newid()";
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@Override
public boolean supportsEmptyInList() {
return false;
}
@Override
public boolean supportsUnionAll() {
return true;
}
@Override
public boolean supportsExistsInSelect() {
return false;
}
@Override
public boolean doesReadCommittedCauseWritersToBlockReaders() {
return true;
}
@Override
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
return true;
}
@Override
public boolean supportsTupleDistinctCounts() {
return false;
}
@Override
public boolean supportsTuplesInSubqueries() {
return false;
}
}