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Diffstat (limited to 'src/backend/optimizer/README')
| -rw-r--r-- | src/backend/optimizer/README | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/optimizer/README b/src/backend/optimizer/README index 1e4084dcf4..84e60f7f6f 100644 --- a/src/backend/optimizer/README +++ b/src/backend/optimizer/README @@ -1076,8 +1076,8 @@ plan as possible. Expanding the range of cases in which more work can be pushed below the Gather (and costing them accurately) is likely to keep us busy for a long time to come. -Partition-wise joins --------------------- +Partitionwise joins +------------------- A join between two similarly partitioned tables can be broken down into joins between their matching partitions if there exists an equi-join condition between the partition keys of the joining tables. The equi-join between @@ -1089,7 +1089,7 @@ 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 partitioned tables -into joins between their partitions is called partition-wise join. We will use +into joins between their partitions is called partitionwise join. We will use term "partitioned relation" for either a partitioned table or a join between compatibly partitioned tables. |