[SPARK-39259][SQL][3.1] Evaluate timestamps consistently in subqueries #36818
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Can one of the admins verify this patch? |
MaxGekk
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Jun 12, 2022
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+1, LGTM. Merging to 3.1. |
MaxGekk
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Jun 12, 2022
### What changes were proposed in this pull request? Apply the optimizer rule ComputeCurrentTime consistently across subqueries. This is a backport of #36654 with adjustements: * The rule does not use pruning * The transformWithSubqueries function was also backported ### Why are the changes needed? At the moment timestamp functions like now() can return different values within a query if subqueries are involved ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? A new unit test was added Closes #36818 from olaky/SPARK-39259-spark_3_1. Authored-by: Ole Sasse <ole.sasse@databricks.com> Signed-off-by: Max Gekk <max.gekk@gmail.com>
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What changes were proposed in this pull request?
Apply the optimizer rule ComputeCurrentTime consistently across subqueries.
This is a backport of #36654 with adjustements:
Why are the changes needed?
At the moment timestamp functions like now() can return different values within a query if subqueries are involved
Does this PR introduce any user-facing change?
No
How was this patch tested?
A new unit test was added