branch-3.1: [opt](paimon) Optimize Paimon Time Travel Implementation and Fix Schema Consistency Issues #56023 #56338
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ma Consistency Issues (#56023) ### What problem does this PR solve? Following PR #55404 which addressed incorrect schema results for Paimon tables, this PR further optimizes the Paimon time travel implementation by removing redundant code and fixing the critical issue where schema ID and snapshot ID were fetched separately, causing consistency problems and unnecessary I/O overhead. #### Key Problem Solved The core challenge in Paimon time travel is efficiently constructing tables with specified snapshot ID and schema ID. Previously, these were fetched separately, causing unnecessary I/O overhead and potential consistency issues. #### Major Improvements 1. Performance Optimization - Unified schema and snapshot retrieval: Combined separate API calls for schema ID and snapshot ID into a single operation - Removed redundant metadata fetches: Eliminated duplicate calls to Paimon metadata store - Optimized branch schema handling: Streamlined branch-specific schema resolution 2. Bug Fixes - Fixed timezone-related query errors: Resolved incorrect results when using Paimon time travel syntax with non-UTC timezones - Fixed branch schema consistency: Ensured snapshot ID and schema ID are always fetched atomically to prevent mismatched metadata 3. Enhanced Timestamp Format Support for FOR TIME AS OF Now supports the following timestamp formats: - YYYY-MM-DD HH:MM:SS.SSS - Full timestamp with milliseconds (e.g., 2024-01-15 10:30:45.123) - YYYY-MM-DD HH:MM:SS - Timestamp with seconds precision (e.g., 2024-01-15 10:30:45) - YYYY-MM-DD - Date only format (defaults to 00:00:00.000) (e.g., 2024-01-15) Example usage: ``` -- Using different timestamp formats SELECT * FROM paimon_table FOR TIME AS OF "2024-01-15 10:30:45.123"; SELECT * FROM paimon_table FOR TIME AS OF "2024-01-15 10:30:45"; SELECT * FROM paimon_table FOR TIME AS OF "2024-01-15"; ```
Contributor
|
Thank you for your contribution to Apache Doris. Please clearly describe your PR:
|
Contributor
|
run buildall |
TPC-H: Total hot run time: 32636 ms |
TPC-DS: Total hot run time: 193303 ms |
ClickBench: Total hot run time: 28.14 s |
Contributor
FE UT Coverage ReportIncrement line coverage |
morrySnow
approved these changes
Sep 25, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Cherry-picked from #56023