protected Dialect() {
log.info( "Using dialect: " + this );
sqlFunctions.putAll( STANDARD_AGGREGATE_FUNCTIONS );
// standard sql92 functions (can be overridden by subclasses)
registerFunction( "substring", new SQLFunctionTemplate( Hibernate.STRING, "substring( 1, 2, 3)" ) );
registerFunction( "locate", new SQLFunctionTemplate( Hibernate.INTEGER, "locate( 1, 2, 3)" ) );
registerFunction( "trim", new SQLFunctionTemplate( Hibernate.STRING, "trim( 1 2 3 4)" ) );
registerFunction( "length", new StandardSQLFunction( "length", Hibernate.INTEGER ) );
registerFunction( "bit_length", new StandardSQLFunction( "bit_length", Hibernate.INTEGER ) );
registerFunction( "coalesce", new StandardSQLFunction( "coalesce" ) );
registerFunction( "nullif", new StandardSQLFunction( "nullif" ) );
registerFunction( "abs", new StandardSQLFunction( "abs" ) );
registerFunction( "mod", new StandardSQLFunction( "mod", Hibernate.INTEGER) );
registerFunction( "sqrt", new StandardSQLFunction( "sqrt", Hibernate.DOUBLE) );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "cast", new CastFunction() );
registerFunction( "extract", new SQLFunctionTemplate(Hibernate.INTEGER, "extract( 1 2 3)") );
//map second/minute/hour/day/month/year to ANSI extract(), override on subclasses
registerFunction( "second", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(second from 1)") );
registerFunction( "minute", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(minute from 1)") );
registerFunction( "hour", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(hour from 1)") );
registerFunction( "day", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(day from 1)") );
registerFunction( "month", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(month from 1)") );
registerFunction( "year", new SQLFunctionTemplate(Hibernate.INTEGER, "extract(year from 1)") );
registerFunction( "str", new SQLFunctionTemplate(Hibernate.STRING, "cast( 1 as char)") );
// register hibernate types for default use in scalar sqlquery type auto detection
registerHibernateType( Types.BIGINT, Hibernate.BIG_INTEGER.getName() );
registerHibernateType( Types.BINARY, Hibernate.BINARY.getName() );
registerHibernateType( Types.BIT, Hibernate.BOOLEAN.getName() );
registerHibernateType( Types.CHAR, Hibernate.CHARACTER.getName() );
registerHibernateType( Types.DATE, Hibernate.DATE.getName() );
registerHibernateType( Types.DOUBLE, Hibernate.DOUBLE.getName() );
registerHibernateType( Types.FLOAT, Hibernate.FLOAT.getName() );
registerHibernateType( Types.INTEGER, Hibernate.INTEGER.getName() );
registerHibernateType( Types.SMALLINT, Hibernate.SHORT.getName() );
registerHibernateType( Types.TINYINT, Hibernate.BYTE.getName() );
registerHibernateType( Types.TIME, Hibernate.TIME.getName() );
registerHibernateType( Types.TIMESTAMP, Hibernate.TIMESTAMP.getName() );
registerHibernateType( Types.VARCHAR, Hibernate.STRING.getName() );
registerHibernateType( Types.VARBINARY, Hibernate.BINARY.getName() );
registerHibernateType( Type