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Test that the default values used when sqlite_stat1 data is not available are calculated correctly. Fixes for the same.

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FossilOrigin-Name: e2d42f909de85a0586389f2dc0e654f7af2e351a
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dan
2014-04-29 19:01:57 +00:00
parent e4618fb30d
commit 264d2b97a9
4 changed files with 68 additions and 28 deletions
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35
src/build.c
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@@ -3260,32 +3260,27 @@ exit_create_index:
** are based on typical values found in actual indices.
*/
void sqlite3DefaultRowEst(Index *pIdx){
#if 0
tRowcnt *a = pIdx->aiRowEst;
int i;
tRowcnt n;
assert( a!=0 );
a[0] = pIdx->pTable->nRowEst;
if( a[0]<10 ) a[0] = 10;
n = 10;
for(i=1; i<=pIdx->nKeyCol; i++){
a[i] = n;
if( n>5 ) n--;
}
if( pIdx->onError!=OE_None ){
a[pIdx->nKeyCol] = 1;
}
#endif
/* 1000000, 10, 9, 8, 7, 6, 5, 4, 3, 2 */
LogEst aVal[] = { 33, 32, 30, 28, 26, 23, 20, 16, 10 };
/* 10, 9, 8, 7, 6 */
LogEst aVal[] = { 33, 32, 30, 28, 26 };
LogEst *a = pIdx->aiRowLogEst;
int nCopy = MIN(ArraySize(aVal), pIdx->nKeyCol);
int i;
/* Set the first entry (number of rows in the index) to the estimated
** number of rows in the table. Or 10, if the estimated number of rows
** in the table is less than that. */
a[0] = pIdx->pTable->nRowLogEst;
if( a[0]<33 ) a[0] = 33; assert( 33==sqlite3LogEst(10) );
/* Estimate that a[1] is 10, a[2] is 9, a[3] is 8, a[4] is 7, a[5] is
** 6 and each subsequent value (if any) is 5. */
memcpy(&a[1], aVal, nCopy*sizeof(LogEst));
if( pIdx->onError!=OE_None ){
a[pIdx->nKeyCol] = 0;
for(i=nCopy+1; i<=pIdx->nKeyCol; i++){
a[i] = 23; assert( 23==sqlite3LogEst(5) );
}
assert( 0==sqlite3LogEst(1) );
if( pIdx->onError!=OE_None ) a[pIdx->nKeyCol] = 0;
}
/*