Optimize first_value and last_value functions with IGNORE NULLS #22092
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Record recently seen non null or null positions, and use them when processing new frames. Should speed up queries with regular framing like ROWS BETWEEN 100 PRECEDING AND 100 FOLLOWING, ROWS CURRENT ROW, or RANGE UNBOUNDED PRECEDING UNBOUNDED FOLLOWING, and with non-null values being sparse or none.
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findepi
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May 23, 2024
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Record recently seen non null or null positions,
and use them when processing new frames.
Should speed up queries with regular framing like
ROWS BETWEEN 100 PRECEDING AND 100 FOLLOWING,
ROWS CURRENT ROW,
or RANGE UNBOUNDED PRECEDING UNBOUNDED FOLLOWING,
and with non-null values being sparse or none.