fix: Taking slicing into account when writing BooleanBuffers as fast-encoding format #1522
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Which issue does this PR close?
Closes #1520.
Rationale for this change
This is a problem I found when working on #1511, the null bits were not correctly written and caused test failures. This patch is an attempt to fix it.
This patch is only aiming for fixing correctness problems. As #1190 (comment) pointed out, the fast BatchWriter may write full data buffer for sliced
Utf8
arrays, so there's still some performance implications when working with sliced arrays.What changes are included in this PR?
Correctly take slicing indices and length into account when writing BooleanBuffers. This applies to null bits of all arrays, and the values of boolean arrays.
How are these changes tested?
Added a new round-trip test for sliced record batches.