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Cache and reuse virtual table cursors in the bytecode engine.

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FossilOrigin-Name: 2d187d4232d750cb1840f1d89c8aed65962cb0883c1d7f91c554b451e475c514
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drh
2025-07-01 17:36:55 +00:00
parent 526399b0fd
commit 5e71497404
3 changed files with 16 additions and 9 deletions
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9
src/vdbe.c
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@@ -8269,7 +8269,14 @@ case OP_VOpen: { /* ncycle */
const sqlite3_module *pModule;
assert( p->bIsReader );
pCur = 0;
pCur = p->apCsr[pOp->p1];
if( pCur!=0
&& ALWAYS( pCur->eCurType==CURTYPE_VTAB )
&& ALWAYS( pCur->uc.pVCur->pVtab==pOp->p4.pVtab->pVtab )
){
/* This opcode is a no-op if the cursor is already open */
break;
}
pVCur = 0;
pVtab = pOp->p4.pVtab->pVtab;
if( pVtab==0 || NEVER(pVtab->pModule==0) ){