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Enhance the sqlite3_stmt_scanstatus() API and add sqlite3_stmt_scanstatus_v2(). For creation of easier to read query performance reports.

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FossilOrigin-Name: 55800833645739efeddcacef464c623931cb6aeb43f4219b4e4faf473c25c8bb
This commit is contained in:
dan
2022-12-02 20:32:22 +00:00
parent bb4e4a4840
commit 231ff4b027
17 changed files with 546 additions and 137 deletions
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7
src/expr.c
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@@ -3257,6 +3257,9 @@ int sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
SelectDest dest; /* How to deal with SELECT result */
int nReg; /* Registers to allocate */
Expr *pLimit; /* New limit expression */
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
int addrExplain;
#endif
Vdbe *v = pParse->pVdbe;
assert( v!=0 );
@@ -3309,7 +3312,7 @@ int sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
** In both cases, the query is augmented with "LIMIT 1". Any
** preexisting limit is discarded in place of the new LIMIT 1.
*/
ExplainQueryPlan((pParse, 1, "%sSCALAR SUBQUERY %d",
ExplainQueryPlan2(addrExplain, (pParse, 1, "%sSCALAR SUBQUERY %d",
addrOnce?"":"CORRELATED ", pSel->selId));
nReg = pExpr->op==TK_SELECT ? pSel->pEList->nExpr : 1;
sqlite3SelectDestInit(&dest, 0, pParse->nMem+1);
@@ -3353,6 +3356,8 @@ int sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
if( addrOnce ){
sqlite3VdbeJumpHere(v, addrOnce);
}
sqlite3VdbeScanStatusEnd(v, addrExplain);
/* Subroutine return */
assert( ExprUseYSub(pExpr) );