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Overview
| Comment: | Fix a buffer overread that might occur in analyze.c if SQLITE_ENABLE_STAT4 was defined. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
c1ae1268b9023a771fda98f26bf451c6 |
| User & Date: | dan 2014-12-05 21:04:26 |
Context
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2014-12-05
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| 21:18 | Avoid a potential NULL pointer deference in the sqlite3_stmt_scanstatus() logic. (check-in: 42d44adc user: drh tags: trunk) | |
| 21:04 | Fix a buffer overread that might occur in analyze.c if SQLITE_ENABLE_STAT4 was defined. (check-in: c1ae1268 user: dan tags: trunk) | |
| 20:46 | Add new test file e_walckpt.test. Still some tests to come. (check-in: e4db3db3 user: dan tags: trunk) | |
| 20:43 | Fix a buffer overread that might occur in analyze.c if SQLITE_ENABLE_STAT4 was defined. (check-in: 194c90db user: dan tags: branch-3.8.7) | |
Changes
Changes to src/analyze.c.
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int i; /* Used to iterate through samples */
tRowcnt sumEq = 0; /* Sum of the nEq values */
tRowcnt avgEq = 0;
tRowcnt nRow; /* Number of rows in index */
i64 nSum100 = 0; /* Number of terms contributing to sumEq */
i64 nDist100; /* Number of distinct values in index */
if( pIdx->aiRowEst==0 || pIdx->aiRowEst[iCol+1]==0 ){
nRow = pFinal->anLt[iCol];
nDist100 = (i64)100 * pFinal->anDLt[iCol];
nSample--;
}else{
nRow = pIdx->aiRowEst[0];
nDist100 = ((i64)100 * pIdx->aiRowEst[0]) / pIdx->aiRowEst[iCol+1];
}
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int i; /* Used to iterate through samples */
tRowcnt sumEq = 0; /* Sum of the nEq values */
tRowcnt avgEq = 0;
tRowcnt nRow; /* Number of rows in index */
i64 nSum100 = 0; /* Number of terms contributing to sumEq */
i64 nDist100; /* Number of distinct values in index */
if( !pIdx->aiRowEst || iCol>=pIdx->nKeyCol || pIdx->aiRowEst[iCol+1]==0 ){
nRow = pFinal->anLt[iCol];
nDist100 = (i64)100 * pFinal->anDLt[iCol];
nSample--;
}else{
nRow = pIdx->aiRowEst[0];
nDist100 = ((i64)100 * pIdx->aiRowEst[0]) / pIdx->aiRowEst[iCol+1];
}
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