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Optimize count(*) for append-only tables #4516

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v0y4g3r opened this issue Aug 6, 2024 · 0 comments · Fixed by #4545
Closed

Optimize count(*) for append-only tables #4516

v0y4g3r opened this issue Aug 6, 2024 · 0 comments · Fixed by #4545
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C-enhancement Category Enhancements

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v0y4g3r commented Aug 6, 2024

What type of enhancement is this?

Performance

What does the enhancement do?

Since log tables are always "append-only", we can summarize total rows by simply adding all rows in memtables/sst files instead of scanning all rows.

Implementation challenges

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@v0y4g3r v0y4g3r added the C-enhancement Category Enhancements label Aug 6, 2024
@v0y4g3r v0y4g3r self-assigned this Aug 6, 2024
@v0y4g3r v0y4g3r mentioned this issue Aug 12, 2024
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perf: count(*) for append-only tables v0y4g3r/greptimedb
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