Re: How to check if a field exists in NEW in trigger

Igal @ Lucee.org schrieb am 05.08.2019 um 00:52:
> I have the following statement in a trigger:
>
>     new.email = lower(new.email);
>
> When I try to update a record without setting the email column however, I get an error:
>
> SQL Error [42703]: ERROR: record "new" has no field "email"
>   Where: SQL statement "SELECT lower(new.email)"
> PL/pgSQL function on_record_modified() line 26 at assignment
>
> I have seen some hacks suggesting TRY/CATCH or converting to a JSON
> and checking if the field exists, but I would think that there's a
> better way to check if the field is in the NEW record, no?

I assume using to_jsonb(new) and then check for the key in the json value
will be faster than checking e.g. information_schema.column
or pg_catalog.pg_attribute