database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-03 16:53:36 +03:00
Code Activity

Changes the formatting of ".scanstats on" in the shell so that the stats for

Browse Source 
subqueries are grouped together and occur after the main query.

FossilOrigin-Name: eacbbd8849db9b023eff15ef1cb42ec941299433
This commit is contained in:
drh
2014-11-06 12:08:21 +00:00
parent c6652b1efe
commit 42f30bce11
3 changed files with 31 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
src/shell.c
View File

@@ -1194,39 +1194,33 @@ static void display_scanstats(
ShellState *pArg /* Pointer to ShellState */
){
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
int i;
double *arEstLoop = 0;
int nEstLoop = 0;
int i, k, n = 1;
fprintf(pArg->out, "-------- scanstats --------\n");
for(i=0; 1; i++){
sqlite3_stmt *p = pArg->pStmt;
sqlite3_int64 nLoop, nVisit;
double rEst, rLoop;
int iSid;
const char *zExplain;
if( sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_NLOOP, (void*)&nLoop) ){
break;
for(k=0; n>0; k++){
double rEstLoop = 1.0;
for(i=n=0; 1; i++){
sqlite3_stmt *p = pArg->pStmt;
sqlite3_int64 nLoop, nVisit;
double rEst;
int iSid;
const char *zExplain;
if( sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_NLOOP, (void*)&nLoop) ){
break;
}
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_SELECTID, (void*)&iSid);
if( iSid!=k ) continue;
if( n==0 && k>0 ) fprintf(pArg->out, "-------- subquery %d --------\n", k);
n++;
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_NVISIT, (void*)&nVisit);
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_EST, (void*)&rEst);
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_EXPLAIN, (void*)&zExplain);
fprintf(pArg->out, "Loop %2d: %s\n", n, zExplain);
rEstLoop *= rEst;
fprintf(pArg->out, " nLoop=%-8lld nRow=%-8lld estRow=%-8lld estRow/Loop=%-8g\n",
nLoop, nVisit, (sqlite3_int64)rEstLoop, rEst
);
}
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_NVISIT, (void*)&nVisit);
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_EST, (void*)&rEst);
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_EXPLAIN, (void*)&zExplain);
sqlite3_stmt_scanstatus(p, i, SQLITE_SCANSTAT_SELECTID, (void*)&iSid);
if( iSid>=nEstLoop ){
arEstLoop = sqlite3_realloc(arEstLoop, sizeof(arEstLoop[0])*(iSid+1) );
while( nEstLoop<=iSid ) arEstLoop[nEstLoop++] = 1.0;
}
if( iSid>=0 ){
arEstLoop[iSid] *= rEst;
rLoop = arEstLoop[iSid];
}else{
rLoop = rEst;
}
fprintf(pArg->out, "Loop %2d: \"%s\"\n", i, zExplain);
fprintf(pArg->out, " nLoop=%-8lld nRow=%-8lld estRow=%-8lld estRow/Loop=%-8g\n",
nLoop, nVisit, (sqlite3_int64)rLoop, rEst
);
}
sqlite3_free(arEstLoop);
#else
fprintf(pArg->out, "-------- scanstats --------\n");
fprintf(pArg->out,