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Improvements to the WHERETRACE debugging logic.

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FossilOrigin-Name: ec1e942f08548695ff02645b3f3cd6bb2516bc9a
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drh
2014-10-21 16:01:40 +00:00
parent c8bbce1e6a
commit 1b131b7a7a
3 changed files with 12 additions and 8 deletions
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6
src/where.c
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@@ -3995,11 +3995,15 @@ static void whereLoopAdjustCost(const WhereLoop *p, WhereLoop *pTemplate){
if( whereLoopCheaperProperSubset(p, pTemplate) ){
/* Adjust pTemplate cost downward so that it is cheaper than its
** subset p */
WHERETRACE(0x80,("subset cost adjustment %d,%d to %d,%d\n",
pTemplate->rRun, pTemplate->nOut, p->rRun, p->nOut-1));
pTemplate->rRun = p->rRun;
pTemplate->nOut = p->nOut - 1;
}else if( whereLoopCheaperProperSubset(pTemplate, p) ){
/* Adjust pTemplate cost upward so that it is costlier than p since
** pTemplate is a proper subset of p */
WHERETRACE(0x80,("subset cost adjustment %d,%d to %d,%d\n",
pTemplate->rRun, pTemplate->nOut, p->rRun, p->nOut+1));
pTemplate->rRun = p->rRun;
pTemplate->nOut = p->nOut + 1;
}
@@ -5751,7 +5755,7 @@ static int wherePathSolver(WhereInfo *pWInfo, LogEst nRowEst){
}
#ifdef WHERETRACE_ENABLED /* >=2 */
if( sqlite3WhereTrace>=2 ){
if( sqlite3WhereTrace & 0x02 ){
sqlite3DebugPrintf("---- after round %d ----\n", iLoop);
for(ii=0, pTo=aTo; ii<nTo; ii++, pTo++){
sqlite3DebugPrintf(" %s cost=%-3d nrow=%-3d order=%c",