Allow left join removals and unique joins on partitioned tables
This allows left join removals and unique joins to work with partitioned
tables. The planner just lacked sufficient proofs that a given join
would not cause any row duplication. Unique indexes currently serve as
that proof, so have get_relation_info() populate the indexlist for
partitioned tables too.
Author: Arne Roland
Reviewed-by: Alvaro Herrera, Zhihong Yu, Amit Langote, David Rowley
Discussion: https://postgr.es/m/c3b2408b7a39433b8230bbcd02e9f302@index.de
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/3c569049b7b502bb4952483d19ce622ff0af5fd6
Modified Files
--------------
src/backend/optimizer/util/plancat.c | 264 +++++++++++++++------------
src/backend/utils/adt/selfuncs.c | 4 +
src/include/nodes/pathnodes.h | 10 +-
src/test/regress/expected/join.out | 10 +
src/test/regress/expected/partition_join.out | 4 +-
src/test/regress/sql/join.sql | 7 +
src/test/regress/sql/partition_join.sql | 4 +-
7 files changed, 179 insertions(+), 124 deletions(-)