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Fix outdated convert_saop_to_hashed_saop comment 

In 29f45e299, we added support for optimizing the execution of NOT
IN(values) by using a hash table instead of a linear search over the
array.  That commit neglected to update the header comment for
convert_saop_to_hashed_saop() to mention this fact.  Here we fix that.

Author: James Coleman
Discussion: https://postgr.es/m/CAAaqYe99NUpAPcxgchGstgM23fmiGjqQPot8627YgkBgNt=BfA@mail.gmail.com
Backpatch-through: 15, where 29f45e299 was added.
This commit is contained in:
David Rowley 2022-09-15 09:40:34 +12:00
parent 111d954024
commit 63840526b0
1 changed files with 2 additions and 1 deletions
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3
src/backend/optimizer/util/clauses.c
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@ -2117,7 +2117,8 @@ eval_const_expressions(PlannerInfo *root, Node *node)
*
* We'll use a hash table if all of the following conditions are met:
* 1. The 2nd argument of the array contain only Consts.
* 2. useOr is true.
* 2. useOr is true or there is a valid negator operator for the
* ScalarArrayOpExpr's opno.
* 3. There's valid hash function for both left and righthand operands and
* these hash functions are the same.
* 4. If the array contains enough elements for us to consider it to be