You are right, that's why the loop doesn't goes through all the columns.
Thanks.
Jan Wieck wrote:
The arrays NEW and OLD only contain entries for attributes in the respective rows that are not NULL. The list $TG_relatts contains a list of all column names of the triggering relation with a leading empty element (to make the index in that list reflect pg_attribute.attnum).
-- Josué Maldonado.
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