registerColumnType( Types.BLOB, "blob" );
registerColumnType( Types.CLOB, "clob" );
}
// aggregate functions
registerFunction( "avg", new AvgWithArgumentCastFunction( "double" ) );
// string functions
registerFunction( "ascii", new StandardSQLFunction( "ascii", StandardBasicTypes.INTEGER ) );
registerFunction( "char", new StandardSQLFunction( "char", StandardBasicTypes.CHARACTER ) );
registerFunction( "lower", new StandardSQLFunction( "lower" ) );