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Performance optimization and slight size reduction in the OP_Transaction

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opcode.

FossilOrigin-Name: 7bee8c195f3fc27aaab13e493ad446a4f19201de3ac064ed6d8a3cbda7c69ee1
This commit is contained in:
drh
2022-04-03 10:42:06 +00:00
parent c2808f39d1
commit 8ee75f7c3a
3 changed files with 11 additions and 10 deletions
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7
src/vdbe.c
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@@ -3754,6 +3754,7 @@ case OP_AutoCommit: {
*/
case OP_Transaction: {
Btree *pBt;
Db *pDb;
int iMeta = 0;
assert( p->bIsReader );
@@ -3773,7 +3774,8 @@ case OP_Transaction: {
}
goto abort_due_to_error;
}
pBt = db->aDb[pOp->p1].pBt;
pDb = &db->aDb[pOp->p1];
pBt = pDb->pBt;
if( pBt ){
rc = sqlite3BtreeBeginTrans(pBt, pOp->p2, &iMeta);
@@ -3814,8 +3816,7 @@ case OP_Transaction: {
assert( pOp->p5==0 || pOp->p4type==P4_INT32 );
if( rc==SQLITE_OK
&& pOp->p5
&& (iMeta!=pOp->p3
|| db->aDb[pOp->p1].pSchema->iGeneration!=pOp->p4.i)
&& (iMeta!=pOp->p3 || pDb->pSchema->iGeneration!=pOp->p4.i)
){
/*
** IMPLEMENTATION-OF: R-03189-51135 As each SQL statement runs, the schema