apache / apache/parquet-java

ParquetRecordReader support building ParquetFileReader using incoming Footer

Open
#2,564 0 comments 0 reactions 0 assignees View on GitHub
Component: Parquet Priority: Major Type: enhancement
Dominant language
Java
Stars
3.1k
Forks
1.6k
Avg merge
3d 12h
Merged PRs (30d)
33

Description

SPARK-33449 discusses adding file meta cache mechanism for Spark SQL to reduce data reading and speed up query.

For the scenarios that need to use ParquetRecordReader, we hope to add an interface to support passing an existing footer to ParquetRecordReader and use this instance to build ParquetFileReader.

**Reporter**: [Yang Jie](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=LuciferYang) / @LuciferYang

**Note**: *This issue was originally created as [PARQUET-1965](https://issues.apache.org/jira/browse/PARQUET-1965). 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 ParquetRecordReader and the code that builds ParquetFileReader, then inspect existing reader tests and usages. Implement support for supplying an existing footer and verify that the reader uses it when constructing the ParquetFileReader without changing the current path for callers that do not provide one.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data-engineering
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.