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Invalidate CachingDirectoryLister when writing through Trino#10915

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findinpath:hive-invalidate-caching-directory-lister
Feb 21, 2022
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Invalidate CachingDirectoryLister when writing through Trino#10915
findepi merged 2 commits intotrinodb:masterfrom
findinpath:hive-invalidate-caching-directory-lister

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@findinpath findinpath commented Feb 2, 2022 •
edited by findepi
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Description

Notify the CachingDirectoryLister about changes that happen
on the table / partition(s) in order to be able to invalidate
the cached directory listings for Hive tables or
partitions of the Hive table.

General information

Is this change a fix, improvement, new feature, refactoring, or other?

This is a cache invalidation fix.

Is this a change to the core query engine, a connector, client library, or the SPI interfaces? (be specific)

This change affects the Hive connector.

How would you describe this change to a non-technical end user or system administrator?

When the content of a table changes,
all the cached paths for under belonging to the table will be
invalidated from the cache.

Please do note that the current implementation does not
make the CachingDirectoryLister aware of changes
performed on the table content by external processes
(e.g. : Hive, Spark).

Related issues, pull requests, and links

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

( ) No release notes entries required.
( x) Release notes entries required with the following suggested text:

# Hive
* File status cache content is invalidated when writing through Trino. ({issue}`10621`)

Fixes #10621

@cla-bot cla-bot bot added the cla-signed label Feb 2, 2022
@findinpath findinpath marked this pull request as draft February 2, 2022 20:27
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findinpath commented Feb 9, 2022

Rebasing on upstream/master to make use of the EvictableCache improvements (support for weigher) #10949

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findepi commented Feb 15, 2022

( currently, depends on #11047 )

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findinpath commented Feb 17, 2022

Rebased on upstream/master to make use of the EvictableCache improvements #11047

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plugin/trino-hive/src/main/java/io/trino/plugin/hive/CachingDirectoryLister.java Outdated
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@findinpath findinpath Feb 17, 2022 •
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Can the usage of the constructor with an unexpected path cause us problems?
I could use String instead of Path for the cache keys to be on the safe side.

findepi
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@findinpath @findepi
Invalidate CachingDirectoryLister when writing through Trino
ba52cee 
Notify the CachingDirectoryLister about changes that happen
on the table in order to be able to invalidate
the cached directory listings for Hive tables or
partitions of the Hive tables.

When the content of a table/partition changes,
all the cached paths for under the corresponding
table/partition directory will be
invalidated from the cache.

Co-authored-by: Piotr Findeisen <piotr.findeisen@gmail.com>
@findinpath findinpath force-pushed the hive-invalidate-caching-directory-lister branch from 0428a10 to ba52cee Compare February 18, 2022 16:57
@findepi findepi merged commit 559d443 into trinodb:master Feb 21, 2022
@findepi findepi mentioned this pull request Feb 21, 2022
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@github-actions github-actions bot added this to the 372 milestone Feb 21, 2022
@mosabua mosabua mentioned this pull request Feb 22, 2022
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@findepi findepi findepi approved these changes

@electrum electrum Awaiting requested review from electrum

@homar homar Awaiting requested review from homar

@losipiuk losipiuk Awaiting requested review from losipiuk

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Incorrect query results when caching directory lister is used

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