Improve DV path canonicalization #1829
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@larsk-db Could you take a look at this PR? |
larsk-db
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Jun 13, 2023
core/src/main/scala/org/apache/spark/sql/delta/commands/DeleteWithDeletionVectorsHelper.scala
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core/src/main/scala/org/apache/spark/sql/delta/commands/DeleteWithDeletionVectorsHelper.scala
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vkorukanti
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Jun 16, 2023
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## Description This PR improves the FILE_PATH canonicalization logic by avoiding calling expensive `Path.toUri.toString` calls for each row in a table. Canonicalized paths are now cached and the UDF just needs to look it up. Future improvement is possible for handling huge logs: build `canonicalizedPathMap` in a distributed way. Related PR target the 2.4 branch: #1829. Existing tests. Closes #1836 Signed-off-by: Paddy Xu <xupaddy@gmail.com> GitOrigin-RevId: c4810852f9136c36ec21f3519620ca26ed12bb04
| // Build two maps, using Path or String as keys. The one with String keys is used in UDF. | ||
| val canonicalizedPathMap = buildCanonicalizedPathMap(txn.deltaLog, candidateFiles) | ||
| val canonicalizedPathStringMap = | ||
| canonicalizedPathMap.map { case (k, v) => k.toString -> v } |
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Why have this second pass, for a single-callsite helper method? Can it just return a string-string map directly, since that's what we ultimately broadcast?
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Thanks for the comment! I addressed your comment in a later PR #1770.
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Closed in favor of #1770. |
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Description
This PR improves the FILE_PATH canonicalization logic by avoiding calling expensive
Path.toUri.toStringcalls for each row in a table. Canonicalized paths are now cached and the UDF just needs to look it up.Future improvement is possible for handling huge logs: build
canonicalizedPathMapin a distributed way.How was this patch tested?
Existing tests.