Atri Sharma <atri.j...@gmail.com> writes:
> Right.I believe this is part of the standard way in which we handle
> interrupts,right? Making sure that we cancel a query when the backend
> is in a state to do so,not when the interrupt actually comes in,right?
Right, the actual signal handler will only kill the query immediately
if the backend is in a safe state (eg, while it's waiting for a
heavyweight lock). Otherwise it just sets a flag that's checked by
CHECK_FOR_INTERRUPTS. See StatementCancelHandler in postgres.c.
regards, tom lane
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