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Commit23edf0e

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Add CHECK_FOR_INTERRUPTS in ExecInsert's speculative insertion loop.
Ordinarily the functions called in this loop ought to have plentyof CFIs themselves; but we've now seen a case where no such CFI isreached, making the loop uninterruptible. Even though that's froma recently-introduced bug, it seems prudent to install a CFI atthe loop level in all branches.Per discussion of bug #17558 from Andrew Kesper (an actual fix forthat bug will follow).Discussion:https://postgr.es/m/17558-3f6599ffcf52fd4a@postgresql.org
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‎src/backend/executor/nodeModifyTable.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -541,9 +541,11 @@ ExecInsert(ModifyTableState *mtstate,
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*
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* We loop back here if we find a conflict below, either during
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* the pre-check, or when we re-check after inserting the tuple
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* speculatively.
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* speculatively. Better allow interrupts in case some bug makes
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* this an infinite loop.
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*/
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vlock:
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CHECK_FOR_INTERRUPTS();
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specConflict= false;
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if (!ExecCheckIndexConstraints(slot,estate,&conflictTid,
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arbiterIndexes))

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