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Another minor optimization to OP_Transaction.

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FossilOrigin-Name: d80077aee3904e5d93164b342cae14d813de8e84e567462412751e06c7487d41
This commit is contained in:
drh
2018-06-06 17:45:51 +00:00
parent bb2d9b1bf1
commit 397776a823
3 changed files with 14 additions and 14 deletions
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14
src/vdbe.c
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@@ -3203,7 +3203,6 @@ case OP_AutoCommit: {
case OP_Transaction: {
Btree *pBt;
int iMeta = 0;
int iGen = 0;
assert( p->bIsReader );
assert( p->readOnly==0 || pOp->p2==0 );
@@ -3249,16 +3248,17 @@ case OP_Transaction: {
p->nStmtDefCons = db->nDeferredCons;
p->nStmtDefImmCons = db->nDeferredImmCons;
}
/* Gather the schema version number for checking:
}
assert( pOp->p5==0 || pOp->p4type==P4_INT32 );
if( pOp->p5
&& (iMeta!=pOp->p3
|| db->aDb[pOp->p1].pSchema->iGeneration!=pOp->p4.i)
){
/*
** IMPLEMENTATION-OF: R-03189-51135 As each SQL statement runs, the schema
** version is checked to ensure that the schema has not changed since the
** SQL statement was prepared.
*/
iGen = db->aDb[pOp->p1].pSchema->iGeneration;
}
assert( pOp->p5==0 || pOp->p4type==P4_INT32 );
if( pOp->p5 && (iMeta!=pOp->p3 || iGen!=pOp->p4.i) ){
sqlite3DbFree(db, p->zErrMsg);
p->zErrMsg = sqlite3DbStrDup(db, "database schema has changed");
/* If the schema-cookie from the database file matches the cookie