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From: Tim McLaughlin <tim@gotab.io>
To: pgsql-general@lists.postgresql.org
Subject: change JSON serialization for BIGINT?
Date: Tue, 26 Nov 2024 06:34:06 -0500
Message-ID: <536dca0f-ef1a-4621-ac1f-9c1c1dd74fbd@Spark> (raw)

Is there a way to have Postgres serialize BIGINT as a string rather than number in JSON?  By default it does this:


select row_to_json(row(500::bigint));
 row_to_json
-------------
 {"f1":500}

But I want it to do this (note that "500" is quoted):

select row_to_json(row(500::bigint));
 row_to_json
-------------
 {"f1":"500"}

I tried doing this, but it has no effect:

CREATE or replace FUNCTION bigintJson(bigint) RETURNS json
    AS 'select $1::text::json;'
    LANGUAGE SQL IMMUTABLE RETURNS NULL ON NULL INPUT;

create cast (bigint as json) with function bigintJson(bigint) as implicit;

Thanks for any guidance.

--
Tim McLaughlin

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