[SPARK-48683][SQL] Fix schema evolution with df.mergeInto losing when clauses
#47055
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xupefei
changed the title
df.mergeInto losing when clausesdf.mergeInto losing when clauses
HyukjinKwon
approved these changes
Jun 24, 2024
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Merged to master. |
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What changes were proposed in this pull request?
This PR fixes an issue in the
DataFrame.mergeIntoAPI where definedwhenclauses are lost after calling thewithSchemaEvoltuion()method.The issue is caused by not copying over existing clauses to the new writer.
Why are the changes needed?
It fixes a bug.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
New test.
Was this patch authored or co-authored using generative AI tooling?
No.