//$Id: SybaseDialect.java 11303 2007-03-19 22:06:14Z steve.ebersole@jboss.com $
package org.hibernate.dialect;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Map;
import java.util.Iterator;
import org.hibernate.Hibernate;
import org.hibernate.LockMode;
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;
/**
* An SQL dialect compatible with Sybase and MS SQL Server.
* @author Gavin King
*/
public class SybaseDialect extends Dialect {
public SybaseDialect() {
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", Hibernate.INTEGER) );
registerFunction( "char", new StandardSQLFunction("char", Hibernate.CHARACTER) );
registerFunction( "len", new StandardSQLFunction("len", Hibernate.LONG) );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "str", new StandardSQLFunction("str", Hibernate.STRING) );
registerFunction( "ltrim", new StandardSQLFunction("ltrim") );
registerFunction( "rtrim", new StandardSQLFunction("rtrim") );
registerFunction( "reverse", new StandardSQLFunction("reverse") );
registerFunction( "space", new StandardSQLFunction("space", Hibernate.STRING) );
registerFunction( "user", new NoArgSQLFunction("user", Hibernate.STRING) );
registerFunction( "current_timestamp", new NoArgSQLFunction("getdate", Hibernate.TIMESTAMP) );
registerFunction( "current_time", new NoArgSQLFunction("getdate", Hibernate.TIME) );
registerFunction( "current_date", new NoArgSQLFunction("getdate", Hibernate.DATE) );
registerFunction( "getdate", new NoArgSQLFunction("getdate", Hibernate.TIMESTAMP) );
registerFunction( "getutcdate", new NoArgSQLFunction("getutcdate", Hibernate.TIMESTAMP) );
registerFunction( "day", new StandardSQLFunction("day", Hibernate.INTEGER) );
registerFunction( "month", new StandardSQLFunction("month", Hibernate.INTEGER) );
registerFunction( "year", new StandardSQLFunction("year", Hibernate.INTEGER) );
registerFunction( "datename", new StandardSQLFunction("datename", Hibernate.STRING) );
registerFunction( "abs", new StandardSQLFunction("abs") );
registerFunction( "sign", new StandardSQLFunction("sign", Hibernate.INTEGER) );
registerFunction( "acos", new StandardSQLFunction("acos", Hibernate.DOUBLE) );
registerFunction( "asin", new StandardSQLFunction("asin", Hibernate.DOUBLE) );
registerFunction( "atan", new StandardSQLFunction("atan", Hibernate.DOUBLE) );
registerFunction( "cos", new StandardSQLFunction("cos", Hibernate.DOUBLE) );
registerFunction( "cot", new StandardSQLFunction("cot", Hibernate.DOUBLE) );
registerFunction( "exp", new StandardSQLFunction("exp", Hibernate.DOUBLE) );
registerFunction( "log", new StandardSQLFunction( "log", Hibernate.DOUBLE) );
registerFunction( "log10", new StandardSQLFunction("log10", Hibernate.DOUBLE) );
registerFunction( "sin", new StandardSQLFunction("sin", Hibernate.DOUBLE) );
registerFunction( "sqrt", new StandardSQLFunction("sqrt", Hibernate.DOUBLE) );
registerFunction( "tan", new StandardSQLFunction("tan", Hibernate.DOUBLE) );
registerFunction( "pi", new NoArgSQLFunction("pi", Hibernate.DOUBLE) );
registerFunction( "square", new StandardSQLFunction("square") );
registerFunction( "rand", new StandardSQLFunction("rand", Hibernate.FLOAT) );
registerFunction("radians", new StandardSQLFunction("radians", Hibernate.DOUBLE) );
registerFunction("degrees", new StandardSQLFunction("degrees", Hibernate.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( Hibernate.STRING, "(","+",")" ) );
registerFunction( "length", new StandardSQLFunction( "len", Hibernate.INTEGER ) );
registerFunction( "trim", new SQLFunctionTemplate( Hibernate.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, Map aliasedLockModes, Map keyColumnNames) {
Iterator itr = aliasedLockModes.entrySet().iterator();
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!
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsEmptyInList() {
return false;
}
public boolean supportsExistsInSelect() {
return false;
}
public boolean doesReadCommittedCauseWritersToBlockReaders() {
return true;
}
public boolean doesRepeatableReadCauseReadersToBlockWriters() {
return true;
}
}