text: SELECT '===LOCATE===';
  SELECT LOCATE('bar', 'foobarbar');
  SELECT LOCATE('xbar', 'foobar');
  SELECT LOCATE('bar', 'foobarbar', 5);
  SELECT '===POSITION===';
  SELECT POSITION('bar' IN 'foobarbar');
  SELECT POSITION('xbar' IN 'foobar');
  SELECT '===INSTR===';
  SELECT INSTR('foobarbar', 'bar');
  SELECT INSTR('foobar', 'xbar');
  
  