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Commitf22e17f

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Don't try to fix eliminated nbtree array scan keys.
Preprocessing for nbtree index scans allowed array "input" scan keysalready marked eliminated during array-specific preprocessing to be"fixed up" during preprocessing proper. This allowed eliminated scankeys on DESC index columns to spurious have their strategy commuted,causing assertion failures.To fix, teach _bt_fix_scankey_strategy to ignore these scan keys. Thisbrings it in line with its only caller, _bt_preprocess_keys.Oversight in commit5bf748b, which enhanced nbtree ScalarArrayOpexecution.Reported-By: Donghang Lin <donghanglin@gmail.com>Discussion:https://postgr.es/m/CAA=D8a2sHK6CAzZ=0CeafC-Y-MFXbYxnRSHvZTi=+JHu6kAa8Q@mail.gmail.com
1 parent9e72f6b commitf22e17f

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‎src/backend/access/nbtree/nbtutils.c

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Original file line numberDiff line numberDiff line change
@@ -3394,6 +3394,13 @@ _bt_fix_scankey_strategy(ScanKey skey, int16 *indoption)
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return true;
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}
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if (skey->sk_strategy==InvalidStrategy)
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{
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/* Already-eliminated array scan key; don't need to fix anything */
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Assert(skey->sk_flags&SK_SEARCHARRAY);
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return true;
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}
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/* Adjust strategy for DESC, if we didn't already */
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if ((addflags&SK_BT_DESC)&& !(skey->sk_flags&SK_BT_DESC))
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skey->sk_strategy=BTCommuteStrategyNumber(skey->sk_strategy);

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