Add support for MERGE ... WHEN NOT MATCHED BY SOURCE. This allows MERGE commands to include WHEN NOT MATCHED BY SOURCE actions, which operate on rows that exist in the target relation, but not in the data source. These actions can execute UPDATE, DELETE, or DO NOTHING sub-commands.
This is in contrast to already-supported WHEN NOT MATCHED actions, which operate on rows that exist in the data source, but not in the target relation. To make this distinction clearer, such actions may now be written as WHEN NOT MATCHED BY TARGET. Writing WHEN NOT MATCHED without specifying BY SOURCE or BY TARGET is equivalent to writing WHEN NOT MATCHED BY TARGET. Dean Rasheed, reviewed by Alvaro Herrera, Ted Yu and Vik Fearing. Discussion: https://postgr.es/m/CAEZATCWqnKGc57Y_JanUBHQXNKcXd7r=0r4nezuvwp+syrk...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/0294df2f1f842dfb0eed79007b21016f486a3c6c Modified Files -------------- doc/src/sgml/mvcc.sgml | 12 +- doc/src/sgml/ref/merge.sgml | 100 +++++-- src/backend/executor/execMain.c | 6 +- src/backend/executor/execPartition.c | 21 +- src/backend/executor/nodeModifyTable.c | 387 ++++++++++++++++---------- src/backend/nodes/nodeFuncs.c | 3 + src/backend/optimizer/plan/createplan.c | 8 +- src/backend/optimizer/plan/planner.c | 22 ++ src/backend/optimizer/plan/setrefs.c | 20 +- src/backend/optimizer/prep/prepjointree.c | 51 +++- src/backend/optimizer/prep/preptlist.c | 26 +- src/backend/optimizer/util/pathnode.c | 5 +- src/backend/parser/gram.y | 62 +++-- src/backend/parser/parse_merge.c | 56 ++-- src/backend/utils/adt/ruleutils.c | 41 ++- src/bin/psql/tab-complete.c | 30 +- src/include/catalog/catversion.h | 2 +- src/include/nodes/execnodes.h | 15 +- src/include/nodes/parsenodes.h | 7 +- src/include/nodes/pathnodes.h | 2 + src/include/nodes/plannodes.h | 2 + src/include/nodes/primnodes.h | 10 +- src/include/optimizer/pathnode.h | 3 +- src/include/parser/kwlist.h | 2 + src/test/isolation/expected/merge-update.out | 88 ++++-- src/test/isolation/specs/merge-update.spec | 10 +- src/test/regress/expected/merge.out | 299 +++++++++++++++----- src/test/regress/expected/rules.out | 32 +++ src/test/regress/expected/updatable_views.out | 90 ++++++ src/test/regress/sql/merge.sql | 122 ++++++-- src/test/regress/sql/rules.sql | 19 ++ src/test/regress/sql/updatable_views.sql | 32 +++ src/tools/pgindent/typedefs.list | 1 + 33 files changed, 1226 insertions(+), 360 deletions(-)
