Thread: pgsql: Add ALTER OPERATOR command, for changing selectivity estimator f
pgsql: Add ALTER OPERATOR command, for changing selectivity estimator f
From
Heikki Linnakangas
Date:
Add ALTER OPERATOR command, for changing selectivity estimator functions. Other options cannot be changed, as it's not totally clear if cached plans would need to be invalidated if one of the other options change. Selectivity estimator functions only change plan costs, not correctness of plans, so those should be safe. Original patch by Uriy Zhuravlev, heavily edited by me. Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/321eed5f0f7563a0cabb3d7a98132856287c1ad1 Modified Files -------------- doc/src/sgml/ref/alter_operator.sgml | 34 ++- src/backend/commands/operatorcmds.c | 301 +++++++++++++++++++++----- src/backend/nodes/copyfuncs.c | 15 ++ src/backend/nodes/equalfuncs.c | 13 ++ src/backend/parser/gram.y | 34 ++- src/backend/tcop/utility.c | 9 + src/include/commands/defrem.h | 1 + src/include/nodes/nodes.h | 1 + src/include/nodes/parsenodes.h | 13 ++ src/test/regress/expected/alter_operator.out | 76 +++++++ src/test/regress/parallel_schedule | 2 +- src/test/regress/serial_schedule | 1 + src/test/regress/sql/alter_operator.sql | 64 ++++++ 13 files changed, 499 insertions(+), 65 deletions(-)