pgsql: Track scan reversals in MergeJoin
| От | Peter Eisentraut |
|---|---|
| Тема | pgsql: Track scan reversals in MergeJoin |
| Дата | |
| Msg-id | E1t0LsE-000ngC-4Z@gemulon.postgresql.org обсуждение исходный текст |
| Список | pgsql-committers |
Track scan reversals in MergeJoin The MergeJoin struct was tracking "mergeStrategies", which were an array of btree strategy numbers, purely for the purpose of comparing it later against btree strategies to determine if the scan direction was forward or reverse. Change that. Instead, track "mergeReversals", an array of bool, to indicate the same without an unfortunate assumption that a strategy number refers specifically to a btree strategy. Author: Mark Dilger <mark.dilger@enterprisedb.com> Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/c594f1ad2ba7cbe66e8ae98da4ffed06491d1082 Modified Files -------------- src/backend/executor/nodeMergejoin.c | 13 ++++--------- src/backend/optimizer/plan/createplan.c | 14 +++++++------- src/include/nodes/plannodes.h | 2 +- 3 files changed, 12 insertions(+), 17 deletions(-)
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