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Re-disallow Memoize for parameterized nested loops with join filters
This was previously fixed in9e215378d
but got broken again as a result of2489d76c4
. It seems that commit causes ppi_clauses to contain duplicate clauses and it's no longer safe to check the list_length of that list to determine if there are join conditions other than what's mentioned in ppi_clauses. Here we adjust the check to count the distinct rinfo_serial mentioned in ppi_clauses. We expect that extra->restrictlist won't have duplicate rinfo_serials. Reported-by: Amadeo Gallardo Author: Richard Guo Discussion: https://postgr.es/m/CADFREbW-BLJd7-a5J%2B5wjVumeFG1ByXiSOFzMtkmY_SDWckTxw%40mail.gmail.com Backpatch-through: 16, where2489d76c4
was introduced.
This commit is contained in:
parent
5b5318c387
commit
74f770ef20
@ -651,7 +651,7 @@ get_memoize_path(PlannerInfo *root, RelOptInfo *innerrel,
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*/
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if (extra->inner_unique &&
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(inner_path->param_info == NULL ||
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list_length(inner_path->param_info->ppi_clauses) <
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bms_num_members(inner_path->param_info->ppi_serials) <
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list_length(extra->restrictlist)))
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return NULL;
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