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Add block skipping for string filters #114

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okayzed opened this issue Mar 6, 2020 · 2 comments
Open

Add block skipping for string filters #114

okayzed opened this issue Mar 6, 2020 · 2 comments

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@okayzed
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okayzed commented Mar 6, 2020

If filtering to a particular string and the block doesn't contain that string, we can skip aggregating that block. This might help certain use cases for redbull.

Basically, we would prioritize unpacking that string column first and then check filter against the string table.

This may or may not work well.

@okayzed
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okayzed commented Mar 7, 2020

evan suggests we can do this using bloom filters and hierarchical bloom filters. this will work for equality but not regex, as far as i can tell

@okayzed
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okayzed commented Apr 11, 2020

An initial implementation now exists for simple equality on strings on a per block basis, but it is not using bloom filters

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