"David Johnston" <pol...@yahoo.com> writes:
> When I execute the following query:
> SELECT 'a=>1'::hstore ? 'a'::text

FWIW, works fine for me.

> I get an "Input parameter count is less then expected" error message.

I can't find such a message (or indeed anything mentioning "parameter
count") anywhere in the Postgres sources.  Are you running this query
bare in psql, or using some other client-side software?  Could the
message be coming from the client-side code?

                        regards, tom lane


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