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colexec: implement rehashing in the vectorized hash table #52257

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yuzefovich opened this issue Aug 3, 2020 · 0 comments · Fixed by #52799
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colexec: implement rehashing in the vectorized hash table #52257

yuzefovich opened this issue Aug 3, 2020 · 0 comments · Fixed by #52799
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A-sql-vec SQL vectorized engine C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)

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Currently, the vectorized hash table only supports fixed number of buckets which is set in the constructor (and has different values based on different use cases for the hash table). However, we should support rehashing behavior. This will likely provide noticeable performance improvements in many operators (hash joiner, unordered distinct, hash aggregator).
@yuzefovich yuzefovich added C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception) A-sql-vec SQL vectorized engine labels Aug 3, 2020
@yuzefovich yuzefovich mentioned this issue Aug 3, 2020
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@yuzefovich yuzefovich mentioned this issue Aug 14, 2020
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@craig craig bot closed this as completed in 8bc4417 Aug 20, 2020
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A-sql-vec SQL vectorized engine C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)
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colexec: implement resizing in the hash table yuzefovich/cockroach
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