Thread: pgsql: Improve run-time partition pruning to handle any stableexpressi
Improve run-time partition pruning to handle any stable expression. The initial coding of the run-time-pruning feature only coped with cases where the partition key(s) are compared to Params. That is a bit silly; we can allow it to work with any non-Var-containing stable expression, as long as we take special care with expressions containing PARAM_EXEC Params. The code is hardly any longer this way, and it's considerably clearer (IMO at least). Per gripe from Pavel Stehule. David Rowley, whacked around a bit by me Discussion: https://postgr.es/m/CAFj8pRBjrufA3ocDm8o4LPGNye9Y+pm1b9kCwode4X04CULG3g@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/73b7f48f78d27b1baf1a6541cbaae0fe6bd6186d Modified Files -------------- src/backend/executor/execPartition.c | 248 ++++++++++++++------------ src/backend/executor/nodeAppend.c | 53 +++--- src/backend/nodes/copyfuncs.c | 7 +- src/backend/nodes/outfuncs.c | 10 +- src/backend/nodes/readfuncs.c | 7 +- src/backend/partitioning/partprune.c | 219 ++++++++++++++--------- src/include/executor/execPartition.h | 38 ++-- src/include/nodes/primnodes.h | 12 +- src/include/partitioning/partprune.h | 20 ++- src/test/regress/expected/partition_prune.out | 90 +++++++++- src/test/regress/sql/partition_prune.sql | 28 ++- 11 files changed, 461 insertions(+), 271 deletions(-)