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Support reading partition table for index merge reader #24160

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qw4990 opened this issue Apr 20, 2021 · 0 comments · Fixed by #24239
Closed

Support reading partition table for index merge reader #24160

qw4990 opened this issue Apr 20, 2021 · 0 comments · Fixed by #24239
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sig/execution SIG execution type/enhancement The issue or PR belongs to an enhancement. type/new-feature

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qw4990 commented Apr 20, 2021

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A subitem of #24150.
To read partition tables, IndexMergeReader needs to be wrapped in another executor PartitionTableExec, since PartitionTableExec is not concurrent, so the performance is unacceptable.
To solve this problem, we decided to make IndexMergeReader support direct reading, which means it has the ability to read partition tables directly instead of being wrapped in another executor.
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executor: make IndexMergeReader support reading partition table directly qw4990/tidb
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