lance-format / lance-format/lance
Count nulls is slow
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@westonpace is already working on this.
Since Mar 7, 2024.
performance
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Description
Reported slow run time for counting nulls on a high cardinality string column:
ds.count_rows(filter="<str_col> is not null")
num rows: ~1B
observed run time: does not appear to finish
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