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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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48
src/update.c
View File

@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.124 2006/06/11 23:41:56 drh Exp $
** $Id: update.c,v 1.125 2006/06/14 19:00:22 drh Exp $
*/
#include "sqliteInt.h"
@@ -277,9 +277,9 @@ void sqlite3Update(
pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
if( pWInfo==0 ) goto update_cleanup;
/* Remember the index of every item to be updated.
/* Remember the rowid of every item to be updated.
*/
sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, 0);
sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
/* End the database scan loop.
@@ -358,7 +358,7 @@ void sqlite3Update(
}
}
if( !isView ){
if( !isView && !IsVirtual(pTab) ){
/*
** Open every index that needs updating. Note that if any
** index could potentially invoke a REPLACE conflict resolution
@@ -390,7 +390,7 @@ void sqlite3Update(
/* Loop over every record that needs updating. We have to load
** the old data for each record to be updated because some columns
** might not change and we will need to copy the old value.
** Also, the old data is needed to delete the old index entires.
** Also, the old data is needed to delete the old index entries.
** So make the cursor point at the old record.
*/
if( !triggers_exist ){
@@ -444,6 +444,42 @@ void sqlite3Update(
sqlite3CompleteInsertion(pParse, pTab, iCur, aIdxUsed, chngRowid, 1, -1);
}
#ifndef SQLITE_OMIT_VIRTUALTABLE
if( !isView && IsVirtual(pTab) ){
addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
/* If the record number will change, push the record number as it
** will be after the update. (The old record number is currently
** on top of the stack.)
*/
if( chngRowid ){
sqlite3ExprCode(pParse, pRowidExpr);
sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
}else{
sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
}
/* Compute new data for this record.
*/
for(i=0; i<pTab->nCol; i++){
if( i==pTab->iPKey ){
sqlite3VdbeAddOp(v, OP_Null, 0, 0);
continue;
}
j = aXRef[i];
if( j<0 ){
sqlite3VdbeAddOp(v, OP_VNoChange, 0, 0);
}else{
sqlite3ExprCode(pParse, pChanges->a[j].pExpr);
}
}
/* Make the update */
sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+2,
(const char*)pTab->pVtab, P3_VTAB);
}
#endif /* SQLITE_OMIT_VIRTUAL */
/* Increment the row counter
*/
if( db->flags & SQLITE_CountRows && !pParse->trigStack){
@@ -474,7 +510,7 @@ void sqlite3Update(
sqlite3VdbeJumpHere(v, addr);
/* Close all tables if there were no FOR EACH ROW triggers */
if( !triggers_exist ){
if( !triggers_exist && !IsVirtual(pTab) ){
for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
if( openAll || aIdxUsed[i] ){
sqlite3VdbeAddOp(v, OP_Close, iCur+i+1, 0);