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Factor common code for generating index keys into a procedure. Other

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speed improvements and bug fixes. (CVS 1487)

FossilOrigin-Name: 6661bb5f9c1692f94b8b7d900b6be07f027e6324
This commit is contained in:
drh
2004-05-28 16:00:21 +00:00
parent 76d505baad
commit 51846b56ed
10 changed files with 91 additions and 71 deletions
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41
src/delete.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle DELETE FROM statements.
**
** $Id: delete.c,v 1.70 2004/05/26 10:11:05 danielk1977 Exp $
** $Id: delete.c,v 1.71 2004/05/28 16:00:22 drh Exp $
*/
#include "sqliteInt.h"
@@ -379,17 +379,34 @@ void sqlite3GenerateRowIndexDelete(
for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
int j;
if( aIdxUsed!=0 && aIdxUsed[i-1]==0 ) continue;
sqlite3VdbeAddOp(v, OP_Recno, iCur, 0);
for(j=0; j<pIdx->nColumn; j++){
int idx = pIdx->aiColumn[j];
if( idx==pTab->iPKey ){
sqlite3VdbeAddOp(v, OP_Dup, j, 0);
}else{
sqlite3VdbeAddOp(v, OP_Column, iCur, idx);
}
}
sqlite3VdbeAddOp(v, OP_MakeIdxKey, pIdx->nColumn, 0);
sqlite3IndexAffinityStr(v, pIdx);
sqlite3GenerateIndexKey(v, pIdx, iCur);
sqlite3VdbeAddOp(v, OP_IdxDelete, iCur+i, 0);
}
}
/*
** Generate code that will assemble an index key and put it on the top
** of the tack. The key with be for index pIdx which is an index on pTab.
** iCur is the index of a cursor open on the pTab table and pointing to
** the entry that needs indexing.
*/
void sqlite3GenerateIndexKey(
Vdbe *v, /* Generate code into this VDBE */
Index *pIdx, /* The index for which to generate a key */
int iCur /* Cursor number for the pIdx->pTable table */
){
int j;
Table *pTab = pIdx->pTable;
sqlite3VdbeAddOp(v, OP_Recno, iCur, 0);
for(j=0; j<pIdx->nColumn; j++){
int idx = pIdx->aiColumn[j];
if( idx==pTab->iPKey ){
sqlite3VdbeAddOp(v, OP_Dup, j, 0);
}else{
sqlite3VdbeAddOp(v, OP_Column, iCur, idx);
}
}
sqlite3VdbeAddOp(v, OP_MakeIdxKey, pIdx->nColumn, 0);
sqlite3IndexAffinityStr(v, pIdx);
}