Re: Tsvector editing functions

Some notices:

1 tsin in documentation doesn't look like a good name. Changed to vector similar 
to other places.

2 I did some editorization about freeing memory/forgotten names etc

3 It seems to me that tsvector_unnest() could be seriously optimized for
large tsvectors: with current coding it detoasts/decompresses tsvector value on 
each call. Much better to do it once in
multi_call_memory_ctx context at first call init

4 It seems debatable returning empty array for position/weight if they are absent:
=# select * from unnest('a:1 b'::tsvector); lexeme | positions | weights
--------+-----------+--------- a      | {1}       | {D} b      | {}        | {}
I think, it's better to return NULL in this case

5 
array_to_tsvector/tsvector_setweight_by_filter/tsvector_delete_arr/tsvector_filter 
doesn't check or pay attention to NULL elements in input arrays





-- 
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
  WWW: http://www.sigaev.ru/