Andres Freund <andres@2ndquadrant.com> writes:
> No need, found the bug. And I think can build a testcase myself.
> ExecReScanMergeAppend resets ms_initialized, but doesn't clear the
> binaryheap. Thus no new elements fit.
Sounds like a bug all right, but I'm not convinced it explains Terje's
report. The thing this theory doesn't explain is why would Terje be
having trouble reproducing the failure? Seems like re-running the same
query ought to produce the same failure.
regards, tom lane