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Take steps to avoid misestimating range query costs based on STAT4 data

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due to the roundoff error of converting from integers to LogEst and back
to integers.

FossilOrigin-Name: 3c933bf95f291f7957580d823dce92c981375a5c
This commit is contained in:
drh
2014-10-22 15:27:05 +00:00
parent 442c5cd3cf
commit 9f07cf7b2e
5 changed files with 13 additions and 11 deletions
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src/where.c
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@@ -2198,7 +2198,7 @@ static int whereRangeScanEst(
/* Determine iLower and iUpper using ($P) only. */
if( nEq==0 ){
iLower = 0;
iUpper = sqlite3LogEstToInt(p->aiRowLogEst[0]);
iUpper = p->nRowEst0;
}else{
/* Note: this call could be optimized away - since the same values must
** have been requested when testing key $P in whereEqualScanEst(). */