brsaweda(at)gmail(dot)com writes:
> test=# SELECT token, lexemes, lexemes = '{}'::text[]
> test-# FROM ts_debug('a title');
> token | lexemes | ?column?
> -------+---------+----------
> a | {} | f
> | |
> title | {titl} | f
> The root of the problem seems to be malformed array dimensions.
> array_dims(lexemes) returns [1:0], while I would expect NULL:
Yeah, that's a bug --- looks like ts_lexize is the root problem.
I'm a bit tempted to fix this centrally by having construct_array()
do something different for zero-dimensioned input, rather than
putting a special case into ts_lexize(). We've been bitten by
this type of insect a few times too many. The question is
whether there's any code that relies on being able to construct
such malformed arrays ...
regards, tom lane