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Tom Lane f61db909df Fix postgres_fdw failure with whole-row Vars of type RECORD. ... Commit 86dc90056 expects that FDWs can cope with whole-row Vars for their tables, even if the Vars are marked with vartype RECORDOID. Previously, whole-row Vars generated by the planner had vartype equal to the relevant table's rowtype OID. (The point behind this change is to enable sharing of resjunk columns across inheritance child tables.) It turns out that postgres_fdw fails to cope with this, though through bad fortune none of its test cases exposed that. Things mostly work, but when we try to read back a value of such a Var, the expected rowtype is not available to record_in(). Fortunately, it's not difficult to hack up the tupdesc that controls this process to substitute the foreign table's rowtype for RECORDOID. Thus we can solve the runtime problem while still sharing the resjunk column with other tables. Per report from Alexander Pyhalov. Discussion: https://postgr.es/m/7817fb9ebd6661cdf9b67dec6e129a78@postgrespro.ru		4 years ago
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postgres_fdw.sql	Fix postgres_fdw failure with whole-row Vars of type RECORD.	4 years ago