parquet: Add tests for disabling statistics on multiple columns#16639
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algojogacor wants to merge 1 commit into
Open
parquet: Add tests for disabling statistics on multiple columns#16639algojogacor wants to merge 1 commit into
algojogacor wants to merge 1 commit into
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Add two new test cases to verify per-column statistics configuration works correctly when stats are disabled on more than one column: - testColumnStatisticsDisabledMultipleColumns: verifies that when stats are enabled on one column and disabled on two others, both disabled columns correctly omit statistics in the Parquet file. - testColumnStatisticsDisabledAllColumns: verifies that when stats are disabled on every column, all columns correctly omit statistics. These tests address the edge case reported in issue apache#15347, where disabling statistics across multiple columns could result in some columns still writing statistics.
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This is an independent contribution and is not associated with any hackathon or competition.
Summary
Adds two new test methods to
TestParquet.javacovering the edge case where per-column statistics are disabled on more than one column simultaneously.Root Cause
The existing test
testColumnStatisticsEnabledonly validates the single-column-disabled scenario. Issue #15347 reported that when statistics are disabled on multiple columns (e.g.,write.parquet.stats-enabled.column.foo=falseandwrite.parquet.stats-enabled.column.bar=false), the second column may still write statistics. These tests provide coverage for that scenario.Changes
testColumnStatisticsDisabledMultipleColumns: Schema with 3 columns (int, string, double); stats enabled on col 1, disabled on cols 2 and 3. Verifies both disabled columns correctly omit statistics.testColumnStatisticsDisabledAllColumns: Schema with 2 columns; stats disabled on both. Verifies every column omits statistics.Testing
Both new tests follow the same pattern as the existing
testColumnStatisticsEnabled: write Parquet data with the given properties, read back the footer, and assert that each ColumnChunkMetaData has the expected statistics state (empty or non-empty).