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If SQLITE_ENABLE_STMT_SCANSTATUS is defined, record the number of times each VDBE opcode is executed. Derive the values returned by sqlite3_stmt_scanstatus() from these records on demand.

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FossilOrigin-Name: 9ea37422a8cc2fce51bb10508e5e90f40fd4b511
This commit is contained in:
dan
2014-11-01 20:38:06 +00:00
parent 89e71646df
commit 6f9702ed4d
10 changed files with 203 additions and 177 deletions
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30
src/vdbeapi.c
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@@ -1476,6 +1476,7 @@ int sqlite3_stmt_status(sqlite3_stmt *pStmt, int op, int resetFlag){
return (int)v;
}
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
/*
** Return status data for a single loop within query pStmt.
*/
@@ -1489,14 +1490,20 @@ int sqlite3_stmt_scanstatus(
const char **pzExplain /* OUT: EQP string */
){
Vdbe *p = (Vdbe*)pStmt;
ExplainArg *pExplain;
if( idx<0 || idx>=p->nExplain ) return 1;
pExplain = p->apExplain[idx];
if( pnLoop ) *pnLoop = pExplain->nLoop;
if( pnVisit ) *pnVisit = pExplain->nVisit;
if( pnEst ) *pnEst = pExplain->nEst;
if( *pzName ) *pzName = pExplain->zName;
if( *pzExplain ) *pzExplain = pExplain->zExplain;
ScanCounter *pScan;
if( idx<0 || idx>=p->nScan ) return 1;
pScan = &p->aScan[idx];
if( pnLoop ) *pnLoop = p->anExec[pScan->addrLoop];
if( pnVisit ) *pnVisit = p->anExec[pScan->addrVisit];
if( pnEst ) *pnEst = pScan->nEst;
if( *pzName ) *pzName = pScan->zName;
if( *pzExplain ){
if( pScan->addrExplain ){
*pzExplain = p->aOp[ pScan->addrExplain ].p4.z;
}else{
*pzExplain = 0;
}
}
return 0;
}
@@ -1505,10 +1512,7 @@ int sqlite3_stmt_scanstatus(
*/
void sqlite3_stmt_scanstatus_reset(sqlite3_stmt *pStmt){
Vdbe *p = (Vdbe*)pStmt;
int i;
for(i=0; i<p->nExplain; i++){
p->apExplain[i]->nLoop = 0;
p->apExplain[i]->nVisit = 0;
}
memset(p->anExec, 0, p->nOp * sizeof(i64));
}
#endif /* SQLITE_ENABLE_STMT_SCANSTATUS */