[GLUTEN-6378][CH] Support delta count optimizer for the MergeTree format #6379
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Support delta count optimizer for the MergeTree format: In Delta, it will use the rule PrepareDeltaScan to optimize the count command, which will directly use the delta meta to response the sql select count(*) from table, now support this optimizer for the MergeTree format. Close apache#6378.
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baibaichen
approved these changes
Jul 9, 2024
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===== Performance report for TPCH SF2000 with Velox backend, for reference only ====
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What changes were proposed in this pull request?
[CH] Support delta count optimizer for the MergeTree format:
In Delta, it will use the rule PrepareDeltaScan to optimize the count command, which will directly use the delta meta to response the sql select count(*) from table, now support this optimizer for the MergeTree format.
Close #6378.
(Fixes: #6378)
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