registerColumnType( Types.LONGVARBINARY, "long varchar for bit data" );
registerColumnType( Types.BINARY, "varchar($l) for bit data" );
registerColumnType( Types.BINARY, 254, "char($l) for bit data" );
registerColumnType( Types.BOOLEAN, "smallint" );
registerFunction( "avg", new AvgWithArgumentCastFunction( "double" ) );
registerFunction( "abs", new StandardSQLFunction( "abs" ) );
registerFunction( "absval", new StandardSQLFunction( "absval" ) );
registerFunction( "sign", new StandardSQLFunction( "sign", StandardBasicTypes.INTEGER ) );