[Feature] Optimize parquet nested col read performance
Open
enhancement
- Dominant language
- Java
- Stars
- 3.4k
- Forks
- 1.4k
- Avg merge
- 1d 11h
- Merged PRs (30d)
- 396
Description
### Search before asking
- [X] I searched in the [issues](https://github.com/apache/paimon/issues) and found nothing similar.
### Motivation
NestedColumnReader has performance regression for simple row col reading
using NestedColumnReader
using RowColumnReader
### Solution
_No response_
### Anything else?
_No response_
### Are you willing to submit a PR?
- [ ] I'm willing to submit a PR!
Contributor guide
No contributing guide indexed for this repository
Research direction
Start by locating NestedColumnReader and RowColumnReader, then reproduce the simple row-column read comparison described in the issue. Measure the nested-reader path against the row-reader path and define done as eliminating the reported performance regression.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data-engineering, performance
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100