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Avoid duplicate OP_Column opcodes by remembering prior results.

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This is similar to CSE, but only applies to columns. (CVS 4943)

FossilOrigin-Name: c29ee0fed23dcdbd9dde6b1e42b603100ea2389c
This commit is contained in:
drh
2008-03-31 23:48:03 +00:00
parent 678ccce8b3
commit e55cbd7228
9 changed files with 209 additions and 47 deletions
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4
src/insert.c
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@@ -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 1.233 2008/03/25 09:47:35 danielk1977 Exp $
** $Id: insert.c,v 1.234 2008/03/31 23:48:05 drh Exp $
*/
#include "sqliteInt.h"
@@ -1171,6 +1171,7 @@ void sqlite3GenerateConstraintChecks(
sqlite3VdbeAddOp2(v, OP_SCopy, regRowid, regIdx+i);
sqlite3VdbeAddOp3(v, OP_MakeRecord, regIdx, pIdx->nColumn+1, aRegIdx[iCur]);
sqlite3IndexAffinityStr(v, pIdx);
sqlite3ExprExpireColumnCacheLines(pParse, regIdx, regIdx+pIdx->nColumn);
sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn+1);
/* Find out what action to take in case there is an indexing conflict */
@@ -1285,6 +1286,7 @@ void sqlite3CompleteInsertion(
regRec = sqlite3GetTempReg(pParse);
sqlite3VdbeAddOp3(v, OP_MakeRecord, regData, pTab->nCol, regRec);
sqlite3TableAffinityStr(v, pTab);
sqlite3ExprExpireColumnCacheLines(pParse, regData, regData+pTab->nCol-1);
#ifndef SQLITE_OMIT_TRIGGER
if( newIdx>=0 ){
sqlite3VdbeAddOp3(v, OP_Insert, newIdx, regRec, regRowid);