apache / apache/parquet-java

Enables predicates collecting their referred columns

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Component: Java Component: Parquet Priority: Major Type: enhancement
Dominant language
Java
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Description

Sometimes we need to collect the columns referred by the predicates to, say, do validation.

This issue propose to enable all 3 FilterCompats to collect the referred columns.

**Reporter**: [Liwei Lin(Inactive)](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=proflin) / @lw-lin
**Assignee**: [Liwei Lin(Inactive)](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=proflin) / @lw-lin

**Note**: *This issue was originally created as [PARQUET-429](https://issues.apache.org/jira/browse/PARQUET-429). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*

Contributor guide

No contributing guide indexed for this repository

Research direction

Start by locating the three FilterCompat implementations named in the issue and inspect how their predicates are represented. Determine how each should expose every referred column for validation; done means all three implementations collect those columns, with coverage for the predicate cases involved.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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