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[SPARK-27080][SQL] bug fix: mergeWithMetastoreSchema with uniform low…
…er case comparison When reading parquet file with merging metastore schema and file schema, we should compare field names using uniform case. In current implementation, lowercase is used but one omission. And this patch fix it. Unit test Closes #24001 from codeborui/mergeSchemaBugFix. Authored-by: CodeGod <> Signed-off-by: Wenchen Fan <firstname.lastname@example.org> (cherry picked from commit a29df5f) Signed-off-by: Wenchen Fan <email@example.com>
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