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When dealing with ResultRelInfos for partitions, there are cases where there are mixed requirements for the ri_RootResultRelInfo. There are cases when the partition itself requires a NULL ri_RootResultRelInfo and in the same query, the same partition may require a ResultRelInfo with its parent set in ri_RootResultRelInfo. This could cause the column mapping between the partitioned table and the partition not to be done which could result in crashes if the column attnums didn't match exactly. The fix is simple. We now check that the ri_RootResultRelInfo matches what the caller passed to ExecGetTriggerResultRel() and only return a cached ResultRelInfo when the ri_RootResultRelInfo matches what the caller wants, otherwise we'll make a new one. Author: David Rowley <dgrowleyml@gmail.com> Author: Amit Langote <amitlangote09@gmail.com> Reported-by: Dmitry Fomin <fomin.list@gmail.com> Discussion: https://postgr.es/m/7DCE78D7-0520-4207-822B-92F60AEA14B4@gmail.com Backpatch-through: 15