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Add SQLITE_STMTSTATUS_FILTER_HIT and _MISS for tracking the effectiveness

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of Bloom filters.

FossilOrigin-Name: 24ba535d200fc8a99dd8e66c6d100b5f6ae442098bafb152008429398eefe3e7
This commit is contained in:
drh
2021-12-06 21:45:31 +00:00
parent 50fb7e09b4
commit 23d41e63f2
6 changed files with 29 additions and 11 deletions
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src/vdbe.c
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@@ -8239,8 +8239,10 @@ case OP_Filter: { /* jump */
h %= pIn1->n;
if( (pIn1->z[h/8] & (1<<(h&7)))==0 ){
VdbeBranchTaken(1, 2);
p->aCounter[SQLITE_STMTSTATUS_FILTER_HIT]++;
goto jump_to_p2;
}else{
p->aCounter[SQLITE_STMTSTATUS_FILTER_MISS]++;
VdbeBranchTaken(0, 2);
}
break;