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Improve AS OF Join Performance through Max Lookback parameter #246

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rportilla-databricks opened this issue Aug 19, 2022 · 1 comment
Open

Improve AS OF Join Performance through Max Lookback parameter #246

rportilla-databricks opened this issue Aug 19, 2022 · 1 comment
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enhancement New feature or request

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Currently, AS OF joins require a window to be retained in memory per partition key (key for the Spark window). Improve may benefit from only looking back a certain number of records (or using a range if appropriate). This ticket should have:

  1. Tests showing perf improvement
  2. Prototype with a lookback parameter option (records lookback or range)
  3. Feedback from a user to see whether this type of approximation is acceptable.
@bendoan-db bendoan-db self-assigned this Nov 1, 2022
@tnixon tnixon added the enhancement New feature or request label Apr 24, 2023
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tnixon commented Apr 24, 2023

Would this be covered by the new tolerance parameter added by @nina-hu in #304?

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@tnixon @rportilla-databricks @bendoan-db