/*
* 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 java.util.Iterator;
import java.util.Map;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.CharIndexFunction;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
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.BIT, "tinyint" ); //Sybase BIT type does not support null values
registerColumnType( Types.BIGINT, "numeric(19,0)" );
registerColumnType( Types.SMALLINT, "smallint" );
registerColumnType( Types.TINYINT, "tinyint" );
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" );
registerFunction( "ascii", new StandardSQLFunction("ascii", StandardBasicTypes.INTEGER) );
registerFunction( "char", new StandardSQLFunction("char", StandardBasicTypes.CHARACTER) );
registerFunction( "len", new StandardSQLFunction("len", StandardBasicTypes.LONG) );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "str", new StandardSQLFunction("str", StandardBasicTypes.STRING) );
registerFunction( "ltrim", new StandardSQLFunction("ltrim") );
registerFunction( "rtrim", new StandardSQLFunction("rtrim") );
registerFunction( "reverse", new StandardSQLFunction("reverse") );
registerFunction( "space", new StandardSQLFunction("space", StandardBasicTypes.STRING) );
registerFunction( "user", new NoArgSQLFunction("user", StandardBasicTypes.STRING) );
registerFunction( "current_timestamp", new NoArgSQLFunction("getdate", StandardBasicTypes.TIMESTAMP) );
registerFunction( "current_time", new NoArgSQLFunction("getdate", StandardBasicTypes.TIME) );
registerFunction( "current_date", new NoArgSQLFunction("getdate", StandardBasicTypes.DATE) );
registerFunction( "getdate", new NoArgSQLFunction("getdate", StandardBasicTypes.TIMESTAMP) );
registerFunction( "getutcdate", new NoArgSQLFunction("getutcdate", StandardBasicTypes.TIMESTAMP) );
registerFunction( "day", new StandardSQLFunction("day", StandardBasicTypes.INTEGER) );
registerFunction( "month", new StandardSQLFunction("month", StandardBasicTypes.INTEGER) );
registerFunction( "year", new StandardSQLFunction("year", StandardBasicTypes.INTEGER) );
registerFunction( "datename", new StandardSQLFunction("datename", StandardBasicTypes.STRING) );
registerFunction( "abs", new StandardSQLFunction("abs") );
registerFunction( "sign", new StandardSQLFunction("sign", StandardBasicTypes.INTEGER) );
registerFunction( "acos", new StandardSQLFunction("acos", StandardBasicTypes.DOUBLE) );
registerFunction( "asin", new StandardSQLFunction("asin", StandardBasicTypes.DOUBLE) );
registerFunction( "atan", new StandardSQLFunction("atan", StandardBasicTypes.DOUBLE) );
registerFunction( "cos", new StandardSQLFunction("cos", StandardBasicTypes.DOUBLE) );
registerFunction( "cot", new StandardSQLFunction("cot", StandardBasicTypes.DOUBLE) );
registerFunction( "exp", new StandardSQLFunction("exp", StandardBasicTypes.DOUBLE) );
registerFunction( "log", new StandardSQLFunction( "log", StandardBasicTypes.DOUBLE) );
registerFunction( "log10", new StandardSQLFunction("log10", StandardBasicTypes.DOUBLE) );
registerFunction( "sin", new StandardSQLFunction("sin", StandardBasicTypes.DOUBLE) );
registerFunction( "sqrt", new StandardSQLFunction("sqrt", StandardBasicTypes.DOUBLE) );
registerFunction( "tan", new StandardSQLFunction("tan", StandardBasicTypes.DOUBLE) );
registerFunction( "pi", new NoArgSQLFunction("pi", StandardBasicTypes.DOUBLE) );
registerFunction( "square", new StandardSQLFunction("square") );
registerFunction( "rand", new StandardSQLFunction("rand", StandardBasicTypes.FLOAT) );
registerFunction("radians", new StandardSQLFunction("radians", StandardBasicTypes.DOUBLE) );
registerFunction("degrees", new StandardSQLFunction("degrees", StandardBasicTypes.DOUBLE) );
registerFunction( "round", new StandardSQLFunction("round") );
registerFunction( "ceiling", new StandardSQLFunction("ceiling") );
registerFunction( "floor", new StandardSQLFunction("floor") );
registerFunction( "isnull", new StandardSQLFunction("isnull") );
registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "(","+",")" ) );
registerFunction( "length", new StandardSQLFunction( "len", StandardBasicTypes.INTEGER ) );
registerFunction( "trim", new SQLFunctionTemplate( StandardBasicTypes.STRING, "ltrim(rtrim(?1))") );
registerFunction( "locate", new CharIndexFunction() );
getDefaultProperties().setProperty(Environment.STATEMENT_BATCH_SIZE, NO_BATCH);
}
public String getAddColumnString() {
return "add";
}
public String getNullColumnString() {
return " null";
}
public boolean qualifyIndexName() {
return false;
}
public String getForUpdateString() {
return "";
}
public boolean supportsIdentityColumns() {
return true;
}
public String getIdentitySelectString() {
return "select @@identity";
}
public String getIdentityColumnString() {
return "identity not null"; //starts with 1, implicitly
}
public boolean supportsInsertSelectIdentity() {
return true;
}
public String appendIdentitySelectToInsert(String insertSQL) {
return insertSQL + "\nselect @@identity";
}
public String appendLockHint(LockMode mode, String tableName) {
if ( mode.greaterThan( LockMode.READ ) ) {
return tableName + " holdlock";
}
else {
return tableName;
}
}
public String applyLocksToSql(String sql, LockOptions aliasedLockOptions, Map keyColumnNames) {
// TODO: merge additional lockoptions support in Dialect.applyLocksToSql
Iterator itr = aliasedLockOptions.getAliasLockIterator();
StringBuffer buffer = new StringBuffer( 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, 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();
}
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
return col; // sql server just returns automatically
}
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();
}
public boolean supportsCurrentTimestampSelection() {
return true;
}
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
public String getCurrentTimestampSelectString() {
return "select getdate()";
}
public boolean supportsTemporaryTables() {
return true;
}
public String generateTemporaryTableName(String baseTableName) {
return "#" + baseTableName;
}
public boolean dropTemporaryTableAfterUse() {
return true; // sql-server, at least needed this dropped after use; strange!
}
public String getSelectGUIDString() {
return "select newid()";
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsEmptyInList() {
return false;
}
public boolean supportsUnionAll() {
return true;
}
public boolean supportsExistsInSelect() {
return false;
}
public boolean doesReadCommittedCauseWritersToBlockReaders() {
return true;
}
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
return true;
}
public boolean supportsTupleDistinctCounts() {
return false;
}
}