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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
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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/sqliteInt.h
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@@ -1801,7 +1801,8 @@ struct Index {
int nSampleCol; /* Size of IndexSample.anEq[] and so on */
tRowcnt *aAvgEq; /* Average nEq values for keys not in aSample */
IndexSample *aSample; /* Samples of the left-most key */
tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this table */
tRowcnt *aiRowEst; /* Non-logarithmic stat1 data for this index */
tRowcnt nRowEst0; /* Non-logarithmic number of rows in the index */
#endif
};