Hi,
This sentence in the section of Partition-wise joins in
src/backend/optimizer/README should be fixed: "This technique of
breaking down a join between partition tables into join between their
partitions is called partition-wise join."
(1) s/a join between partition tables/a join between partitioned tables/
(2) s/join between their partitions/joins between their partitions/
It might be okay to leave #2 as-is, but I'd like to propose to change
that way to make the meaning clear.
Attached is a patch for that.
Best regards,
Etsuro Fujita
diff --git a/src/backend/optimizer/README b/src/backend/optimizer/README
index 031e503..1e4084d 100644
--- a/src/backend/optimizer/README
+++ b/src/backend/optimizer/README
@@ -1088,8 +1088,8 @@ broken into joins between the matching partitions. The
resultant join is
partitioned in the same way as the joining relations, thus allowing an N-way
join between similarly partitioned tables having equi-join condition between
their partition keys to be broken down into N-way joins between their matching
-partitions. This technique of breaking down a join between partition tables
-into join between their partitions is called partition-wise join. We will use
+partitions. This technique of breaking down a join between partitioned tables
+into joins between their partitions is called partition-wise join. We will use
term "partitioned relation" for either a partitioned table or a join between
compatibly partitioned tables.
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