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[CALCITE-7936] Top-down decorrelator should avoid redundant domain joins for nested LATERAL queries - #5412
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xiedeyantu wants to merge 1 commit into
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[CALCITE-7936] Top-down decorrelator should avoid redundant domain joins for nested LATERAL queries#5412xiedeyantu wants to merge 1 commit into
xiedeyantu wants to merge 1 commit into
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…ins for nested LATERAL queries When the left input of a nested INNER Correlate is independent of the outer correlation variables, carry the outer domain only through the right input. Remove the redundant domain join on the left and update join conditions and output mappings accordingly. Verify the simplified plan with a plan snapshot and cover duplicate rows and NULL correlation keys with execution tests. Signed-off-by: xiedeyantu <czjourney@163.com>
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When the left input of a nested INNER Correlate is independent of the outer correlation variables, carry the outer domain only through the right input. Remove the redundant domain join on the left and update join conditions and output mappings accordingly.
Verify the simplified plan with a plan snapshot and cover duplicate rows and NULL correlation keys with execution tests.
Jira Link
CALCITE-7936
Changes Proposed
See CALCITE-7936