Commits on Sep 28, 2022

1. opt: add tests for FK delete cascade fast-path with UDF …

   The FK delete cascade fast-path remaps the `DELETE` filter into a filter
   on child table, avoiding buffering the parent's deleted rows like in the
   non-fast-path plan. It is possible to plan this fast-path if the filters
   contain UDF invocations, as long as they are immutable or stable. (Of
   course, if the user creates a UDF with mislabeled volatility, data
   corruption is possible. To mitigate this and other corruption from
   mislabeled UDF volatility in the future, we're considering performing
   some analysis during `CREATE FUNCTION` to prevent users from incorrectly
   assigning volatility.)
   
   This commit adds tests for FK delete cascades with UDFs and removes an
   unnecessary TODO.
   
   Release note: None

   

   mgartner committed Sep 28, 2022
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