Amit Langote <amitlangot...@gmail.com> writes:
> destdb=# ALTER TABLE c ADD CONSTRAINT p_a_check CHECK (a IN ('a', 'b', 'c'));
> destdb=# \d c
> ...
> Check constraints:
> "p_a_check" CHECK (a::text = ANY (ARRAY['a'::character varying,
> 'b'::character varying, 'c'::character varying]::text[]))
Hm. It seems like the parser is doing something weird with IN there.
If you just do a simple comparison the constant ends up as TEXT to start
with:
regression=# CREATE TABLE pp (a varchar, CHECK (a = 'a'));
regression=# \d pp
...
Check constraints:
"pp_a_check" CHECK (a::text = 'a'::text)
Or for that matter
regression=# CREATE TABLE p (a varchar, CHECK (a = any(array['a', 'b', 'c'])));
regression=# \d p
...
Check constraints:
"p_a_check" CHECK (a::text = ANY (ARRAY['a'::text, 'b'::text, 'c'::text]))
I wonder why you don't get an array of text constants in the IN case.
regards, tom lane
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