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More work toward converting the VM into a register-based machine. (CVS 4704)

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FossilOrigin-Name: 8cbd46517f407b3b1ce187b623db10f00aa415ea
This commit is contained in:
drh
2008-01-10 23:50:11 +00:00
parent 892d317990
commit 2d401ab8f9
15 changed files with 348 additions and 536 deletions
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38
src/update.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.166 2008/01/09 23:04:12 drh Exp $
** $Id: update.c,v 1.167 2008/01/10 23:50:11 drh Exp $
*/
#include "sqliteInt.h"
@@ -404,50 +404,60 @@ void sqlite3Update(
sqlite3VdbeAddOp2(v, OP_StackDepth, -1, 0);
if( triggers_exist ){
int regRowid;
int regRow;
int regCols;
/* Make cursor iCur point to the record that is being updated.
*/
sqlite3VdbeAddOp3(v, OP_NotExists, iCur, addr, regOldRowid);
/* Generate the OLD table
*/
sqlite3VdbeAddOp2(v, OP_Rowid, iCur, 0);
regRowid = sqlite3GetTempReg(pParse);
regRow = sqlite3GetTempReg(pParse);
sqlite3VdbeAddOp2(v, OP_Rowid, iCur, regRowid);
if( !old_col_mask ){
sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
sqlite3VdbeAddOp2(v, OP_Null, 0, regRow);
}else{
sqlite3VdbeAddOp1(v, OP_RowData, iCur);
sqlite3VdbeAddOp2(v, OP_RowData, iCur, regRow);
}
sqlite3CodeInsert(pParse, oldIdx, 0);
sqlite3VdbeAddOp3(v, OP_Insert, oldIdx, regRow, regRowid);
/* Generate the NEW table
*/
if( chngRowid ){
sqlite3ExprCodeAndCache(pParse, pRowidExpr);
sqlite3ExprCodeAndCache(pParse, pRowidExpr, regRowid);
}else{
sqlite3VdbeAddOp2(v, OP_Rowid, iCur, 0);
sqlite3VdbeAddOp2(v, OP_Rowid, iCur, regRowid);
}
regCols = sqlite3GetTempRange(pParse, pTab->nCol);
for(i=0; i<pTab->nCol; i++){
if( i==pTab->iPKey ){
sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
sqlite3VdbeAddOp2(v, OP_Null, 0, regCols+i);
continue;
}
j = aXRef[i];
if( new_col_mask&((u32)1<<i) || new_col_mask==0xffffffff ){
if( j<0 ){
sqlite3VdbeAddOp2(v, OP_Column, iCur, i);
sqlite3VdbeAddOp3(v, OP_Column, iCur, i, regCols+i);
sqlite3ColumnDefault(v, pTab, i);
}else{
sqlite3ExprCodeAndCache(pParse, pChanges->a[j].pExpr);
sqlite3ExprCodeAndCache(pParse, pChanges->a[j].pExpr, regCols+i);
}
}else{
sqlite3VdbeAddOp2(v, OP_Null, 0, 0);
sqlite3VdbeAddOp2(v, OP_Null, 0, regCols+i);
}
}
sqlite3VdbeAddOp2(v, OP_MakeRecord, pTab->nCol, 0);
sqlite3VdbeAddOp3(v, OP_RegMakeRec, regCols, pTab->nCol, regRow);
if( !isView ){
sqlite3TableAffinityStr(v, pTab);
}
sqlite3ReleaseTempRange(pParse, regCols, pTab->nCol);
if( pParse->nErr ) goto update_cleanup;
sqlite3CodeInsert(pParse, newIdx, 0);
sqlite3VdbeAddOp3(v, OP_Insert, newIdx, regRow, regRowid);
sqlite3ReleaseTempReg(pParse, regRowid);
sqlite3ReleaseTempReg(pParse, regRow);
sqlite3VdbeAddOp2(v, OP_Goto, 0, iBeginBeforeTrigger);
sqlite3VdbeJumpHere(v, iEndBeforeTrigger);
@@ -495,7 +505,7 @@ void sqlite3Update(
/* Delete the old indices for the current record.
*/
sqlite3GenerateRowIndexDelete(v, pTab, iCur, aRegIdx);
sqlite3GenerateRowIndexDelete(pParse, pTab, iCur, aRegIdx);
/* If changing the record number, delete the old record.
*/