[Enhancement] Add DrivingTableSelectionRule
#55513
Open
+732
−1
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Why I'm doing:
#52399
support similar to #55376: If the table and driving table are only in an OR relationship, cross join is converted to union all
What I'm doing:
DrivingTableSelectionRule
is used to adjust the position of the driving table according to the on predicate of the inner join when multiple tables are cross joined and the root is an inner join. Reduce the overhead caused by Join in this caseImplementation idea:
Analyze the corresponding relationship between the tables of the two columns in the BinaryPredicateOperator through the on predicate of the inner join, and establish an undirected graph. When all edges only have the same table as the endpoint, the table is a driving table, which is the top layer of the inner join table to replace(if the replaced node is not the driving table)
What type of PR is this:
Does this PR entail a change in behavior?
If yes, please specify the type of change:
Checklist:
Bugfix cherry-pick branch check: