Return None when Parquet page indexes are not present in file
#6639
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tustvold
approved these changes
Oct 29, 2024
tustvold
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api-change
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Which issue does this PR close?
Part of #6447. Also see #6582.
Rationale for this change
The behavior of
ParquetMetaDataReaderwhen requesting page indexes differs between synchronous and asynchronous implementations. For historical reasons, the synchronous methods currently return empty vectors for theColumnIndexandOffsetIndexwhen page indexes are requested but not present in the file. The asynchronous methods instead returnNonein that case.What changes are included in this PR?
This PR changes the behavior of
ParquetMetaDataReaderto always returnNonewhen page indexes are requested but not present. It also changes the behavior and signatures of the legacy functionsread_columns_indexesandread_offset_indexes. These will now return optional vectors set toNonerather than empty vectors when page indexes are not present.Are there any user-facing changes?
Yes, as noted above.