Uroš Bojanić created SPARK-58948:
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Summary: Deduplicate nulls-buffer creation in columnar
decompressors
Key: SPARK-58948
URL: https://issues.apache.org/jira/browse/SPARK-58948
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 4.3.0
Reporter: Uroš Bojanić
Each columnar decompressor (PassThrough, RunLengthEncoding, DictionaryEncoding,
BooleanBitSet, IntDelta, LongDelta) repeats the same two-line idiom to build
the nulls buffer: buffer.duplicate().order(ByteOrder.nativeOrder()) followed by
rewind(). This extracts a protected createNullsBuffer(buffer) helper on the
shared Decoder trait and routes the six call sites through it. No behavior
change; it also normalizes one site that called rewind without parentheses.
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