Re-disallow Memoize for parameterized nested loops with join filters This was previously fixed in 9e215378d but got broken again as a result of 2489d76c4. 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, where 2489d76c4 was introduced. Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/2bcf0785cd1080b85f0d2ccd595b195970730491 Modified Files -------------- src/backend/optimizer/path/joinpath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)