Avoid reading Iceberg delete files when not needed#13395
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findepi merged 2 commits intotrinodb:masterfrom Aug 8, 2022
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Avoid reading Iceberg delete files when not needed#13395findepi merged 2 commits intotrinodb:masterfrom
findepi merged 2 commits intotrinodb:masterfrom
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homar
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findepi
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Switched the approach here to just wrap the DeleteFilter reading in a Supplier. I think that reads better
plugin/trino-iceberg/src/main/java/io/trino/plugin/iceberg/IcebergPageSourceProvider.java
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plugin/trino-iceberg/src/main/java/io/trino/plugin/iceberg/delete/DeleteFile.java
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.array()
do we need to make a defensive copy of these?
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Probably. Added a call to clone
plugin/trino-iceberg/src/main/java/io/trino/plugin/iceberg/delete/DeleteFile.java
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Applied comments in fixup commit, thanks @findepi |
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@alexjo2144 can you please rebase? |
Parqet only. Skip reading the delete files associated with a data file if the deletes are not relevant. This can happen when the statistics from the data file already show the split can be skipped. Additionally, this can happen when the line numbers read by the split are known and can be used to filter positional deletes.
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Description
Parqet only.
Skip reading the delete files associated with a data file if the deletes are
not relevant. This can happen when the statistics from the data file already
show the split can be skipped. Additionally, this can happen when the line
numbers read by the split are known and can be used to filter positional
deletes.
Performance improvement
Iceberg connector
Minimize I/O operations
Related issues, pull requests, and links
#13219
Documentation
(x) No documentation is needed.
( ) Sufficient documentation is included in this PR.
( ) Documentation PR is available with #prnumber.
( ) Documentation issue #issuenumber is filed, and can be handled later.
Release notes
(x) No release notes entries required.
( ) Release notes entries required with the following suggested text: