lance-format/lance
在 GitHub 查看Don't materialize any data on `count_rows` if the filter can be satisfied by a scalar index
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#2,682 建立於 2024年8月2日
good first issuehelp wanted
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If we can satisfy a filter with a scalar index then we should be able to implement a fast path for count_rows where we simply return the size of the allow_list or even possibly subtract the size of the block_list from the metadata-only count_rows (might be some tricky bits if there are deletion vectors) to quickly answer queries like count_rows("x != 'foo'").