database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-11 01:42:22 +03:00
Code Activity

Improvements to the XFER Optimization of the INSERT statement. (CVS 3736)

Browse Source 
FossilOrigin-Name: 53fff7d1f2f829010a2641c7738538b3155da4b2
This commit is contained in:
drh
2007-03-28 18:04:10 +00:00
parent 72e8fa42f9
commit 95bad4c751
4 changed files with 93 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/insert.c
View File

@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.177 2007/03/27 12:04:05 drh Exp $
** $Id: insert.c,v 1.178 2007/03/28 18:04:10 drh Exp $
*/
#include "sqliteInt.h"
@@ -1498,16 +1498,20 @@ static int xferOptimization(
}
sqlite3OpenTable(pParse, iSrc, iDbSrc, pSrc, OP_OpenRead);
emptySrcTest = sqlite3VdbeAddOp(v, OP_Rewind, iSrc, 0);
memRowid = pParse->nMem++;
sqlite3VdbeAddOp(v, OP_Rowid, iSrc, 0);
sqlite3VdbeAddOp(v, OP_MemStore, memRowid, 1);
addr1 = sqlite3VdbeAddOp(v, OP_Rowid, iSrc, 0);
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
addr2 = sqlite3VdbeAddOp(v, OP_NotExists, iDest, 0);
sqlite3VdbeOp3(v, OP_Halt, SQLITE_CONSTRAINT, onError,
"PRIMARY KEY must be unique", P3_STATIC);
sqlite3VdbeJumpHere(v, addr2);
autoIncStep(pParse, counterMem);
if( pDest->iPKey>=0 ){
memRowid = pParse->nMem++;
sqlite3VdbeAddOp(v, OP_Rowid, iSrc, 0);
sqlite3VdbeAddOp(v, OP_MemStore, memRowid, 1);
addr1 = sqlite3VdbeAddOp(v, OP_Rowid, iSrc, 0);
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
addr2 = sqlite3VdbeAddOp(v, OP_NotExists, iDest, 0);
sqlite3VdbeOp3(v, OP_Halt, SQLITE_CONSTRAINT, onError,
"PRIMARY KEY must be unique", P3_STATIC);
sqlite3VdbeJumpHere(v, addr2);
autoIncStep(pParse, counterMem);
}else{
addr1 = sqlite3VdbeAddOp(v, OP_Rowid, iSrc, 0);
}
sqlite3VdbeAddOp(v, OP_RowData, iSrc, 0);
sqlite3VdbeOp3(v, OP_Insert, iDest, OPFLAG_NCHANGE|OPFLAG_LASTROWID,
pDest->zName, 0);