I wrote:
> I'm thinking there are two distinct bugs here.
Actually, make that three bugs. I was so focused on the crashing
that I failed to notice that ts_delete wasn't producing sane answers
even when it didn't crash:
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'{smith,smith}'::text[]);
ts_delete
---------------------
'smith' 'foo' 'bar'
(1 row)
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'{smith,foo}'::text[]);
ts_delete
---------------
'smith' 'bar'
(1 row)
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'{bar,smith}'::text[]);
ts_delete
---------------------
'smith' 'foo' 'bar'
(1 row)
The non-array version is no better:
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'smith'::text);
ts_delete
---------------------
'smith' 'foo' 'bar'
(1 row)
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'foo'::text);
ts_delete
---------------
'smith' 'bar'
(1 row)
regression=# select ts_delete(array_to_tsvector('{smith,foo,bar}'::text[]),
'bar'::text);
ts_delete
---------------------
'smith' 'foo' 'bar'
(1 row)
I'm not sure if ts_delete takes its second argument as verbatim lexemes
or normalizes them first, but none of these words are changed by
to_tsvector, so either way it seems to fail to delete stuff it should.
regards, tom lane
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