Thread: pgsql: Don't add a redundant constraint when detaching a partition
Don't add a redundant constraint when detaching a partition On ALTER TABLE .. DETACH CONCURRENTLY, we add a new table constraint that duplicates the partition constraint. But if the partition already has another constraint that implies that one, then that's unnecessary. We were already avoiding the addition of a duplicate constraint if there was an exact 'equal' match -- this just improves the quality of the check. Author: Justin Pryzby <pryzby@telsasoft.com> Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org> Discussion: https://postgr.es/m/20210410184226.GY6592@telsasoft.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/7b357cc6ae553c0ecacdc11b2e5278b7bf477dba Modified Files -------------- src/backend/commands/tablecmds.c | 61 ++++++++++++++----------------- src/test/regress/expected/alter_table.out | 20 ++++++++++ src/test/regress/sql/alter_table.sql | 6 +++ 3 files changed, 54 insertions(+), 33 deletions(-)