['WORD','select'],
['WORD','case'],
['WORD','when'],
['WORD','a'],
'=',
['WORD','b'],
['WORD','then'],
['QUOTED', '\'c\''],
['WORD','else'],
['QUOTED','\'d\''],
['WORD','end'],
['DQWORD','"tough_one"'],
['COMMA',','],
['WORD','e'],
['WORD','as'],
['DQUOTED','"even tougher"'],
['WORD','from'],
['WORD','mytable']