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Commite4cbfd6

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Add vacuum_delay_point call in compute_index_stats's per-sample-row loop.
Slow functions in index expressions might cause this loop to take longenough to make it worth being cancellable. Probably it would be enoughto call CHECK_FOR_INTERRUPTS here, but for consistency with otherper-sample-row loops in this file, let's use vacuum_delay_point.Report and patch by Jeff Janes. Back-patch to all supported branches.
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‎src/backend/commands/analyze.c

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@@ -742,6 +742,8 @@ compute_index_stats(Relation onerel, double totalrows,
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{
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HeapTupleheapTuple=rows[rowno];
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vacuum_delay_point();
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/*
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* Reset the per-tuple context each time, to reclaim any cruft
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* left behind by evaluating the predicate or index expressions.

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