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Overview
| Comment: | Very small performance improvement by ensuring that the argument to sqlite3VdbeFreeCursor() is non-NULL. Hold for the next sprint. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | close-cursor-faster |
| Files: | files | file ages | folders |
| SHA3-256: |
f8801ffd946d288099bc3af20602c0d2 |
| User & Date: | drh 2020-01-16 13:02:26 |
Context
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2020-01-16
| ||
| 13:02 | Very small performance improvement by ensuring that the argument to sqlite3VdbeFreeCursor() is non-NULL. Hold for the next sprint. Leaf check-in: f8801ffd user: drh tags: close-cursor-faster | |
| 12:25 | Fix an SQL syntax error in the comment on the omit-left-join optimization. No changes to code. check-in: 86b5e5a2 user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
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/* Opcode: Close P1 * * * *
**
** Close a cursor previously opened as P1. If P1 is not
** currently open, this instruction is a no-op.
*/
case OP_Close: {
assert( pOp->p1>=0 && pOp->p1<p->nCursor );
sqlite3VdbeFreeCursor(p, p->apCsr[pOp->p1]);
p->apCsr[pOp->p1] = 0;
break;
}
#ifdef SQLITE_ENABLE_COLUMN_USED_MASK
/* Opcode: ColumnsUsed P1 * * P4 *
**
** This opcode (which only exists if SQLite was compiled with
|
> | | > |
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/* Opcode: Close P1 * * * *
**
** Close a cursor previously opened as P1. If P1 is not
** currently open, this instruction is a no-op.
*/
case OP_Close: {
assert( pOp->p1>=0 && pOp->p1<p->nCursor );
if( p->apCsr[pOp->p1] ){
sqlite3VdbeFreeCursor(p, p->apCsr[pOp->p1]);
p->apCsr[pOp->p1] = 0;
}
break;
}
#ifdef SQLITE_ENABLE_COLUMN_USED_MASK
/* Opcode: ColumnsUsed P1 * * P4 *
**
** This opcode (which only exists if SQLite was compiled with
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Changes to src/vdbeaux.c.
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*/
void sqlite3VdbeFrameDelete(VdbeFrame *p){
int i;
Mem *aMem = VdbeFrameMem(p);
VdbeCursor **apCsr = (VdbeCursor **)&aMem[p->nChildMem];
assert( sqlite3VdbeFrameIsValid(p) );
for(i=0; i<p->nChildCsr; i++){
sqlite3VdbeFreeCursor(p->v, apCsr[i]);
}
releaseMemArray(aMem, p->nChildMem);
sqlite3VdbeDeleteAuxData(p->v->db, &p->pAuxData, -1, 0);
sqlite3DbFree(p->v->db, p);
}
#ifndef SQLITE_OMIT_EXPLAIN
................................................................................
}
/*
** Close a VDBE cursor and release all the resources that cursor
** happens to hold.
*/
void sqlite3VdbeFreeCursor(Vdbe *p, VdbeCursor *pCx){
if( pCx==0 ){
return;
}
assert( pCx->pBtx==0 || pCx->eCurType==CURTYPE_BTREE );
switch( pCx->eCurType ){
case CURTYPE_SORTER: {
sqlite3VdbeSorterClose(p->db, pCx);
break;
}
case CURTYPE_BTREE: {
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*/
void sqlite3VdbeFrameDelete(VdbeFrame *p){
int i;
Mem *aMem = VdbeFrameMem(p);
VdbeCursor **apCsr = (VdbeCursor **)&aMem[p->nChildMem];
assert( sqlite3VdbeFrameIsValid(p) );
for(i=0; i<p->nChildCsr; i++){
if( apCsr[i] ) sqlite3VdbeFreeCursor(p->v, apCsr[i]);
}
releaseMemArray(aMem, p->nChildMem);
sqlite3VdbeDeleteAuxData(p->v->db, &p->pAuxData, -1, 0);
sqlite3DbFree(p->v->db, p);
}
#ifndef SQLITE_OMIT_EXPLAIN
................................................................................
}
/*
** Close a VDBE cursor and release all the resources that cursor
** happens to hold.
*/
void sqlite3VdbeFreeCursor(Vdbe *p, VdbeCursor *pCx){
assert( pCx!=0 );
assert( pCx->pBtx==0 || pCx->eCurType==CURTYPE_BTREE );
switch( pCx->eCurType ){
case CURTYPE_SORTER: {
sqlite3VdbeSorterClose(p->db, pCx);
break;
}
case CURTYPE_BTREE: {
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