branch-4.0: [opt](hive) Speed up Hive insert on partition tables using cache #58166#58540
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yiguolei merged 1 commit intobranch-4.0from Dec 2, 2025
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branch-4.0: [opt](hive) Speed up Hive insert on partition tables using cache #58166#58540yiguolei merged 1 commit intobranch-4.0from
yiguolei merged 1 commit intobranch-4.0from
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) ### What problem does this PR solve? For Hive tables with massive partitions (10K+), INSERT operations are extremely slow because: - FE fetches all partition metadata from HMS directly (expensive RPC calls) - Full table cache invalidation after each insert (unnecessary) Problem Summary: 1. **Use cache for partition metadata in INSERT** - FE now fetches partition info from cache instead of directly querying HMS when preparing INSERT - Avoid expensive HMS RPC calls for every INSERT operation 2. **Selective cache refresh after commit** - Only invalidate affected partitions instead of full table cache - Based on partition update info from BE (NEW/APPEND/OVERWRITE) - Significantly reduces cache invalidation overhead 3. **Handle cache inconsistency gracefully** - When BE marks partition as NEW but it already exists in HMS (cache miss) - FE detects this by checking HMS and treats it as APPEND instead of failing - Prevents `AlreadyExistsException` errors For tables with partitions: - **Before**: HMS calls per INSERT + full cache invalidation - **After**: cache lookup + selective partition refresh - Expected speedup: 10x-100x for partition metadata fetching phas
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yiguolei
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Dec 2, 2025
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Cherry-picked from #58166