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Added code to INSERT, DELETE and UPDATE virtual tables. The new code is

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mostly untested. (CVS 3248)

FossilOrigin-Name: 32c97b884b104d120db3c0a87f5eab28f36851f8
This commit is contained in:
drh
2006-06-14 19:00:20 +00:00
parent badf7a7a2f
commit 4cbdda9e27
11 changed files with 176 additions and 61 deletions
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29
src/delete.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.123 2006/06/11 23:41:55 drh Exp $
** $Id: delete.c,v 1.124 2006/06/14 19:00:21 drh Exp $
*/
#include "sqliteInt.h"
@@ -42,8 +42,12 @@ Table *sqlite3SrcListLookup(Parse *pParse, SrcList *pSrc){
** writable return 0;
*/
int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
if( pTab->readOnly && (pParse->db->flags & SQLITE_WriteSchema)==0
&& pParse->nested==0 ){
if( (pTab->readOnly && (pParse->db->flags & SQLITE_WriteSchema)==0
&& pParse->nested==0)
#ifndef SQLITE_OMIT_VIRTUALTABLE
|| (pTab->pModule && pTab->pModule->xUpdate==0)
#endif
){
sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
return 1;
}
@@ -66,7 +70,9 @@ void sqlite3OpenTable(
Table *pTab, /* The table to be opened */
int opcode /* OP_OpenRead or OP_OpenWrite */
){
Vdbe *v = sqlite3GetVdbe(p);
Vdbe *v;
if( IsVirtual(pTab) ) return;
v = sqlite3GetVdbe(p);
assert( opcode==OP_OpenWrite || opcode==OP_OpenRead );
sqlite3TableLock(p, iDb, pTab->tnum, (opcode==OP_OpenWrite), pTab->zName);
sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
@@ -205,7 +211,7 @@ void sqlite3DeleteFrom(
** It is easier just to erase the whole table. Note, however, that
** this means that the row change count will be incorrect.
*/
if( pWhere==0 && !triggers_exist ){
if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
if( db->flags & SQLITE_CountRows ){
/* If counting rows deleted, just count the total number of
** entries in the table. */
@@ -243,7 +249,7 @@ void sqlite3DeleteFrom(
/* Remember the rowid of every item to be deleted.
*/
sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
if( db->flags & SQLITE_CountRows ){
sqlite3VdbeAddOp(v, OP_AddImm, 1, 0);
@@ -304,7 +310,14 @@ void sqlite3DeleteFrom(
}
/* Delete the row */
sqlite3GenerateRowDelete(db, v, pTab, iCur, pParse->nested==0);
#ifndef SQLITE_OMIT_VIRTUALTABLE
if( IsVirtual(pTab) ){
sqlite3VdbeOp3(v, OP_VUpdate, 0, 1, (const char*)pTab->pVtab, P3_VTAB);
}else
#endif
{
sqlite3GenerateRowDelete(db, v, pTab, iCur, pParse->nested==0);
}
}
/* If there are row triggers, close all cursors then invoke
@@ -327,7 +340,7 @@ void sqlite3DeleteFrom(
sqlite3VdbeResolveLabel(v, end);
/* Close the cursors after the loop if there are no row triggers */
if( !triggers_exist ){
if( !triggers_exist && !IsVirtual(pTab) ){
for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
sqlite3VdbeAddOp(v, OP_Close, iCur + i, pIdx->tnum);
}