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Commit735cd61

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Fix portability issues with stddev in pg_stat_statements
Stddev is calculated on the fly, and the code in commit717f709 wasusing Float8GetDatumFast() inappropriately to convert the result to aDatum. Mea culpa. It now uses Float8GetDatum().
1 parent717f709 commit735cd61

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‎contrib/pg_stat_statements/pg_stat_statements.c

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1577,12 +1577,15 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
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* sample variance, as we have data for the whole population,
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* so Bessel's correction is not used, and we don't divide by
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* tmp.calls - 1.
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*
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* We're calculating the stddev on the fly, so it's not in the tmp
1582+
* structure, so we can't use the Float8GetDatumFast macro here.
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*/
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if (tmp.calls>1)
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values[i++]=
1583-
Float8GetDatumFast(sqrtd(tmp.sum_var_time /tmp.calls));
1586+
Float8GetDatum(sqrtd(tmp.sum_var_time /tmp.calls));
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else
1585-
values[i++]=Float8GetDatumFast(0.0);
1588+
values[i++]=Float8GetDatum(0.0);
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}
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values[i++]=Int64GetDatumFast(tmp.rows);
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values[i++]=Int64GetDatumFast(tmp.shared_blks_hit);

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