[fix](mv) Fix sync mv could not be chosen by cbo stable because stats upload from be not in time#58720
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morrySnow merged 1 commit intoapache:masterfrom Dec 5, 2025
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… upload from be not in time (#58720) This PR introduces two key modifications to improve the reliability of the optimizer (CBO) and the testing pipeline concerning materialized views: 1. Fixes unstable selection of synchronous materialized views in the pipeline: The root cause was that the statistical information of the base table was not reported promptly. This delay could lead the CBO to estimate selectedPartitionsRowCountas zero for the materialized view, causing it to be incorrectly bypassed during query planning. The fix involves manually injecting the statistical information for the synchronous materialized view when available, ensuring the CBO can make a stable and accurate assessment of its cost . 2. Removes the fuzzy value setting for preMaterializedViewRewriteStrategyin SessionVariable: The test cases for the TRY_IN_RBO strategy have already been extended to cover scenarios equivalent to both NOT_IN_RBO and FORCE_IN_RBO. Retaining the fuzzy option can introduce unnecessary instability into the pipeline. For instance, a PR might pass tests when the strategy is TRY_IN_RBO but fail if the pipeline randomly selects NOT_IN_RBO, leading to inconsistent results. Removing this fuzzy setting helps eliminate such non-deterministic failures and enhances pipeline stability
seawinde
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… upload from be not in time (apache#58720) This PR introduces two key modifications to improve the reliability of the optimizer (CBO) and the testing pipeline concerning materialized views: 1. Fixes unstable selection of synchronous materialized views in the pipeline: The root cause was that the statistical information of the base table was not reported promptly. This delay could lead the CBO to estimate selectedPartitionsRowCountas zero for the materialized view, causing it to be incorrectly bypassed during query planning. The fix involves manually injecting the statistical information for the synchronous materialized view when available, ensuring the CBO can make a stable and accurate assessment of its cost . 2. Removes the fuzzy value setting for preMaterializedViewRewriteStrategyin SessionVariable: The test cases for the TRY_IN_RBO strategy have already been extended to cover scenarios equivalent to both NOT_IN_RBO and FORCE_IN_RBO. Retaining the fuzzy option can introduce unnecessary instability into the pipeline. For instance, a PR might pass tests when the strategy is TRY_IN_RBO but fail if the pipeline randomly selects NOT_IN_RBO, leading to inconsistent results. Removing this fuzzy setting helps eliminate such non-deterministic failures and enhances pipeline stability
nagisa-kunhah
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Dec 14, 2025
… upload from be not in time (apache#58720) This PR introduces two key modifications to improve the reliability of the optimizer (CBO) and the testing pipeline concerning materialized views: 1. Fixes unstable selection of synchronous materialized views in the pipeline: The root cause was that the statistical information of the base table was not reported promptly. This delay could lead the CBO to estimate selectedPartitionsRowCountas zero for the materialized view, causing it to be incorrectly bypassed during query planning. The fix involves manually injecting the statistical information for the synchronous materialized view when available, ensuring the CBO can make a stable and accurate assessment of its cost . 2. Removes the fuzzy value setting for preMaterializedViewRewriteStrategyin SessionVariable: The test cases for the TRY_IN_RBO strategy have already been extended to cover scenarios equivalent to both NOT_IN_RBO and FORCE_IN_RBO. Retaining the fuzzy option can introduce unnecessary instability into the pipeline. For instance, a PR might pass tests when the strategy is TRY_IN_RBO but fail if the pipeline randomly selects NOT_IN_RBO, leading to inconsistent results. Removing this fuzzy setting helps eliminate such non-deterministic failures and enhances pipeline stability
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What problem does this PR solve?
This PR introduces two key modifications to improve the reliability of the optimizer (CBO) and the testing pipeline concerning materialized views:
Fixes unstable selection of synchronous materialized views in the pipeline: The root cause was that the statistical information of the base table was not reported promptly. This delay could lead the CBO to estimate selectedPartitionsRowCountas zero for the materialized view, causing it to be incorrectly bypassed during query planning. The fix involves manually injecting the statistical information for the synchronous materialized view when available, ensuring the CBO can make a stable and accurate assessment of its cost .
Removes the fuzzy value setting for preMaterializedViewRewriteStrategyin SessionVariable: The test cases for the TRY_IN_RBO strategy have already been extended to cover scenarios equivalent to both NOT_IN_RBO and FORCE_IN_RBO. Retaining the fuzzy option can introduce unnecessary instability into the pipeline. For instance, a PR might pass tests when the strategy is TRY_IN_RBO but fail if the pipeline randomly selects NOT_IN_RBO, leading to inconsistent results. Removing this fuzzy setting helps eliminate such non-deterministic failures and enhances pipeline stability
Issue Number: close #xxx
Related PR: #xxx
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