ZiLin Chen created CALCITE-4681:
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Summary: Rule operand match specific shape with or without
RelSubset.class/RelNode.class
Key: CALCITE-4681
URL: https://issues.apache.org/jira/browse/CALCITE-4681
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: ZiLin Chen
If we want to match such a pattern, LogicalJoin1 with left Input XXX(original
LogicalJoin1 left input) and with right input (LogicalJoin.class). we wound
find that XXX we should use RelNode.class or RelSubset.class. However both
RelNode.class and RelSubset.class will match all kind of traitSet which is
inefficient（rule may fires multi time just because of some kind of XXX with
different trait）, especially when this is a JoinReorder Rule.
The XXX operand we want to match is exact what LogicalJoin1.getLeft() return.
LogicalJoin1
- XXX(original LogicalJoin1 left input)
- LogicalJoin2
Is that any way we can provide to solve this problem?
One way maybe changing what RelSubset.class operand match meaning? (Now, there
is no rule in calcite with RelSubset.class as match operand. Before
JoinAssociateRule is the only one match RelSubset.class, but change later )
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