Sorry Adrian, my bad. I'd mentioned "deposit_sub_no='1'" by mistake,
actually it was "deposit_sub_no=cast(1 as varchar)". This was throwing
error "SQL Error [42883]: ERROR: operator does not exist: numeric =
character varying Hint: No operator matches the given name and argument
types. You might need to add explicit type casts. Position: 19". Then
realized that "numeric=text" works but "numeric=varchar" does not. I
could resolve the problem by creating the following function and
operator by commenting "CUMMUTATOR" and "NEGATOR". Also the error
"operator is only a shell" also vanished. I'm just sharing the script
for your reference. Thank you very much for your valuable support.
CREATE OR REPLACE FUNCTION public.num_eq_varchar(
numeric,
varchar)
RETURNS boolean
AS 'select case when $2 ~ ''^[0-9\.]+$'' then $1 operator(pg_catalog.=)
cast($2 as numeric) else $1::varchar = $2 end;'
LANGUAGE SQL IMMUTABLE;
-- Operator: =;
-- DROP OPERATOR IF EXISTS public.= (numeric , varchar);
CREATE OPERATOR public.= (
FUNCTION = num_eq_varchar,
LEFTARG = numeric,
RIGHTARG = varchar,
-- COMMUTATOR = =,
-- NEGATOR = <>,
RESTRICT = eqsel,
JOIN = eqjoinsel,
HASHES, MERGES
);
Thanks,
Rajesh S
On 18-03-2024 21:20, Adrian Klaver wrote:
On 3/18/24 00:05, Rajesh S wrote:
Thank you for your response. Actually, I was trying to address the
following query.
select LIEN_AC_NO from deposit_lien where deposit_no='0002114029832'
and deposit_sub_no='1' and unlien_dt is null and unlien_remarks is null;
In the above query "deposit_sub_no" column is "numeric" type and
passing '1' (as varchar). To address this I'd created the function
and operator as I'd mentioned in the earlier mail. Even the following
query throws error after creating the function and operator.
select * from deposit_lien where deposit_no='0002114029832';
ERROR: operator is only a shell: character varying = numeric LINE 1:
select * from deposit_lien where deposit_no='0002114029832' ^ SQL
state: 42883 Character: 44
In the above query "deposit_no" column is having "varchar" data
type. But before creating the function and operator it was working
fine. Tried dropping the same, even though the same error. How to
proceed now?
Not clear to me what the problem is you are trying to solve?
On a stock Postgres install:
select 1::numeric = '1';
?column?
----------
t
select '0002114029832'::varchar = '0002114029832';
?column?
----------
t
Thanks,
Rajesh S
On 15-03-2024 19:10, Greg Sabino Mullane wrote:
On Fri, Mar 15, 2024 at 6:26 AM Rajesh S <rajes...@fincuro.com> wrote:
I wanted to implement a new "=" (equal) operator with LEFTARG as
numeric and RIGHTARG as varchar. But after creating the function
and operator, psql shows the error "operator is only a shell:
character varying = numeric
Your operator has numeric on the left and varchar on the right. But
your query is doing numeric on the RIGHT. Probably want to make a
matching one to cover both cases.
Cheers,
Greg
