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1/*
2** 2001 September 15
3**
4** The author disclaims copyright to this source code. In place of
5** a legal notice, here is a blessing:
6**
7** May you do good and not evil.
8** May you find forgiveness for yourself and forgive others.
9** May you share freely, never taking more than you give.
10**
11*************************************************************************
12** This file contains C code routines that are called by the parser
13** to handle UPDATE statements.
14**
15** $Id: update.c,v 1.137 2007/03/29 05:51:49 drh Exp $
16*/
17#include "sqliteInt.h"
18
19#ifndef SQLITE_OMIT_VIRTUALTABLE
20/* Forward declaration */
21static void updateVirtualTable(
22 Parse *pParse, /* The parsing context */
23 SrcList *pSrc, /* The virtual table to be modified */
24 Table *pTab, /* The virtual table */
25 ExprList *pChanges, /* The columns to change in the UPDATE statement */
26 Expr *pRowidExpr, /* Expression used to recompute the rowid */
27 int *aXRef, /* Mapping from columns of pTab to entries in pChanges */
28 Expr *pWhere /* WHERE clause of the UPDATE statement */
29);
30#endif /* SQLITE_OMIT_VIRTUALTABLE */
31
32/*
33** The most recently coded instruction was an OP_Column to retrieve the
34** i-th column of table pTab. This routine sets the P3 parameter of the
35** OP_Column to the default value, if any.
36**
37** The default value of a column is specified by a DEFAULT clause in the
38** column definition. This was either supplied by the user when the table
39** was created, or added later to the table definition by an ALTER TABLE
40** command. If the latter, then the row-records in the table btree on disk
41** may not contain a value for the column and the default value, taken
42** from the P3 parameter of the OP_Column instruction, is returned instead.
43** If the former, then all row-records are guaranteed to include a value
44** for the column and the P3 value is not required.
45**
46** Column definitions created by an ALTER TABLE command may only have
47** literal default values specified: a number, null or a string. (If a more
48** complicated default expression value was provided, it is evaluated
49** when the ALTER TABLE is executed and one of the literal values written
50** into the sqlite_master table.)
51**
52** Therefore, the P3 parameter is only required if the default value for
53** the column is a literal number, string or null. The sqlite3ValueFromExpr()
54** function is capable of transforming these types of expressions into
55** sqlite3_value objects.
56*/
57void sqlite3ColumnDefault(Vdbe *v, Table *pTab, int i){
58 if( pTab && !pTab->pSelect ){
59 sqlite3_value *pValue;
60 u8 enc = ENC(sqlite3VdbeDb(v));
61 Column *pCol = &pTab->aCol[i];
62 sqlite3ValueFromExpr(pCol->pDflt, enc, pCol->affinity, &pValue);
63 if( pValue ){
64 sqlite3VdbeChangeP3(v, -1, (const char *)pValue, P3_MEM);
65 }else{
66 VdbeComment((v, "# %s.%s", pTab->zName, pCol->zName));
67 }
68 }
69}
70
71/*
72** Process an UPDATE statement.
73**
74** UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
75** \_______/ \________/ \______/ \________________/
76* onError pTabList pChanges pWhere
77*/
78void sqlite3Update(
79 Parse *pParse, /* The parser context */
80 SrcList *pTabList, /* The table in which we should change things */
81 ExprList *pChanges, /* Things to be changed */
82 Expr *pWhere, /* The WHERE clause. May be null */
83 int onError /* How to handle constraint errors */
84){
85 int i, j; /* Loop counters */
86 Table *pTab; /* The table to be updated */
87 int addr = 0; /* VDBE instruction address of the start of the loop */
88 WhereInfo *pWInfo; /* Information about the WHERE clause */
89 Vdbe *v; /* The virtual database engine */
90 Index *pIdx; /* For looping over indices */
91 int nIdx; /* Number of indices that need updating */
92 int nIdxTotal; /* Total number of indices */
93 int iCur; /* VDBE Cursor number of pTab */
94 sqlite3 *db; /* The database structure */
95 Index **apIdx = 0; /* An array of indices that need updating too */
96 char *aIdxUsed = 0; /* aIdxUsed[i]==1 if the i-th index is used */
97 int *aXRef = 0; /* aXRef[i] is the index in pChanges->a[] of the
98 ** an expression for the i-th column of the table.
99 ** aXRef[i]==-1 if the i-th column is not changed. */
100 int chngRowid; /* True if the record number is being changed */
101 Expr *pRowidExpr = 0; /* Expression defining the new record number */
102 int openAll = 0; /* True if all indices need to be opened */
103 AuthContext sContext; /* The authorization context */
104 NameContext sNC; /* The name-context to resolve expressions in */
105 int iDb; /* Database containing the table being updated */
106 int memCnt = 0; /* Memory cell used for counting rows changed */
107
108#ifndef SQLITE_OMIT_TRIGGER
109 int isView; /* Trying to update a view */
110 int triggers_exist = 0; /* True if any row triggers exist */
111#endif
112
113 int newIdx = -1; /* index of trigger "new" temp table */
114 int oldIdx = -1; /* index of trigger "old" temp table */
115
116 sContext.pParse = 0;
117 if( pParse->nErr || sqlite3MallocFailed() ){
118 goto update_cleanup;
119 }
120 db = pParse->db;
121 assert( pTabList->nSrc==1 );
122
123 /* Locate the table which we want to update.
124 */
125 pTab = sqlite3SrcListLookup(pParse, pTabList);
126 if( pTab==0 ) goto update_cleanup;
127 iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
128
129 /* Figure out if we have any triggers and if the table being
130 ** updated is a view
131 */
132#ifndef SQLITE_OMIT_TRIGGER
133 triggers_exist = sqlite3TriggersExist(pParse, pTab, TK_UPDATE, pChanges);
134 isView = pTab->pSelect!=0;
135#else
136# define triggers_exist 0
137# define isView 0
138#endif
139#ifdef SQLITE_OMIT_VIEW
140# undef isView
141# define isView 0
142#endif
143
144 if( sqlite3IsReadOnly(pParse, pTab, triggers_exist) ){
145 goto update_cleanup;
146 }
147 if( sqlite3ViewGetColumnNames(pParse, pTab) ){
148 goto update_cleanup;
149 }
150 aXRef = sqliteMallocRaw( sizeof(int) * pTab->nCol );
151 if( aXRef==0 ) goto update_cleanup;
152 for(i=0; i<pTab->nCol; i++) aXRef[i] = -1;
153
154 /* If there are FOR EACH ROW triggers, allocate cursors for the
155 ** special OLD and NEW tables
156 */
157 if( triggers_exist ){
158 newIdx = pParse->nTab++;
159 oldIdx = pParse->nTab++;
160 }
161
162 /* Allocate a cursors for the main database table and for all indices.
163 ** The index cursors might not be used, but if they are used they
164 ** need to occur right after the database cursor. So go ahead and
165 ** allocate enough space, just in case.
166 */
167 pTabList->a[0].iCursor = iCur = pParse->nTab++;
168 for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
169 pParse->nTab++;
170 }
171
172 /* Initialize the name-context */
173 memset(&sNC, 0, sizeof(sNC));
174 sNC.pParse = pParse;
175 sNC.pSrcList = pTabList;
176
177 /* Resolve the column names in all the expressions of the
178 ** of the UPDATE statement. Also find the column index
179 ** for each column to be updated in the pChanges array. For each
180 ** column to be updated, make sure we have authorization to change
181 ** that column.
182 */
183 chngRowid = 0;
184 for(i=0; i<pChanges->nExpr; i++){
185 if( sqlite3ExprResolveNames(&sNC, pChanges->a[i].pExpr) ){
186 goto update_cleanup;
187 }
188 for(j=0; j<pTab->nCol; j++){
189 if( sqlite3StrICmp(pTab->aCol[j].zName, pChanges->a[i].zName)==0 ){
190 if( j==pTab->iPKey ){
191 chngRowid = 1;
192 pRowidExpr = pChanges->a[i].pExpr;
193 }
194 aXRef[j] = i;
195 break;
196 }
197 }
198 if( j>=pTab->nCol ){
199 if( sqlite3IsRowid(pChanges->a[i].zName) ){
200 chngRowid = 1;
201 pRowidExpr = pChanges->a[i].pExpr;
202 }else{
203 sqlite3ErrorMsg(pParse, "no such column: %s", pChanges->a[i].zName);
204 goto update_cleanup;
205 }
206 }
207#ifndef SQLITE_OMIT_AUTHORIZATION
208 {
209 int rc;
210 rc = sqlite3AuthCheck(pParse, SQLITE_UPDATE, pTab->zName,
211 pTab->aCol[j].zName, db->aDb[iDb].zName);
212 if( rc==SQLITE_DENY ){
213 goto update_cleanup;
214 }else if( rc==SQLITE_IGNORE ){
215 aXRef[j] = -1;
216 }
217 }
218#endif
219 }
220
221 /* Allocate memory for the array apIdx[] and fill it with pointers to every
222 ** index that needs to be updated. Indices only need updating if their
223 ** key includes one of the columns named in pChanges or if the record
224 ** number of the original table entry is changing.
225 */
226 for(nIdx=nIdxTotal=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdxTotal++){
227 if( chngRowid ){
228 i = 0;
229 }else {
230 for(i=0; i<pIdx->nColumn; i++){
231 if( aXRef[pIdx->aiColumn[i]]>=0 ) break;
232 }
233 }
234 if( i<pIdx->nColumn ) nIdx++;
235 }
236 if( nIdxTotal>0 ){
237 apIdx = sqliteMallocRaw( sizeof(Index*) * nIdx + nIdxTotal );
238 if( apIdx==0 ) goto update_cleanup;
239 aIdxUsed = (char*)&apIdx[nIdx];
240 }
241 for(nIdx=j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
242 if( chngRowid ){
243 i = 0;
244 }else{
245 for(i=0; i<pIdx->nColumn; i++){
246 if( aXRef[pIdx->aiColumn[i]]>=0 ) break;
247 }
248 }
249 if( i<pIdx->nColumn ){
250 apIdx[nIdx++] = pIdx;
251 aIdxUsed[j] = 1;
252 }else{
253 aIdxUsed[j] = 0;
254 }
255 }
256
257 /* Begin generating code.
258 */
259 v = sqlite3GetVdbe(pParse);
260 if( v==0 ) goto update_cleanup;
261 if( pParse->nested==0 ) sqlite3VdbeCountChanges(v);
262 sqlite3BeginWriteOperation(pParse, 1, iDb);
263
264#ifndef SQLITE_OMIT_VIRTUALTABLE
265 /* Virtual tables must be handled separately */
266 if( IsVirtual(pTab) ){
267 updateVirtualTable(pParse, pTabList, pTab, pChanges, pRowidExpr, aXRef,
268 pWhere);
269 pWhere = 0;
270 pTabList = 0;
271 goto update_cleanup;
272 }
273#endif
274
275 /* Resolve the column names in all the expressions in the
276 ** WHERE clause.
277 */
278 if( sqlite3ExprResolveNames(&sNC, pWhere) ){
279 goto update_cleanup;
280 }
281
282 /* Start the view context
283 */
284 if( isView ){
285 sqlite3AuthContextPush(pParse, &sContext, pTab->zName);
286 }
287
288 /* If we are trying to update a view, realize that view into
289 ** a ephemeral table.
290 */
291 if( isView ){
292 Select *pView;
293 pView = sqlite3SelectDup(pTab->pSelect);
294 sqlite3Select(pParse, pView, SRT_EphemTab, iCur, 0, 0, 0, 0);
295 sqlite3SelectDelete(pView);
296 }
297
298 /* Begin the database scan
299 */
300 pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0);
301 if( pWInfo==0 ) goto update_cleanup;
302
303 /* Remember the rowid of every item to be updated.
304 */
305 sqlite3VdbeAddOp(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, 0);
306 sqlite3VdbeAddOp(v, OP_FifoWrite, 0, 0);
307
308 /* End the database scan loop.
309 */
310 sqlite3WhereEnd(pWInfo);
311
312 /* Initialize the count of updated rows
313 */
314 if( db->flags & SQLITE_CountRows && !pParse->trigStack ){
315 memCnt = pParse->nMem++;
316 sqlite3VdbeAddOp(v, OP_MemInt, 0, memCnt);
317 }
318
319 if( triggers_exist ){
320 /* Create pseudo-tables for NEW and OLD
321 */
322 sqlite3VdbeAddOp(v, OP_OpenPseudo, oldIdx, 0);
323 sqlite3VdbeAddOp(v, OP_SetNumColumns, oldIdx, pTab->nCol);
324 sqlite3VdbeAddOp(v, OP_OpenPseudo, newIdx, 0);
325 sqlite3VdbeAddOp(v, OP_SetNumColumns, newIdx, pTab->nCol);
326
327 /* The top of the update loop for when there are triggers.
328 */
329 addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
330
331 if( !isView ){
332 sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
333 sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
334 /* Open a cursor and make it point to the record that is
335 ** being updated.
336 */
337 sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
338 }
339 sqlite3VdbeAddOp(v, OP_MoveGe, iCur, 0);
340
341 /* Generate the OLD table
342 */
343 sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
344 sqlite3VdbeAddOp(v, OP_RowData, iCur, 0);
345 sqlite3VdbeAddOp(v, OP_Insert, oldIdx, 0);
346
347 /* Generate the NEW table
348 */
349 if( chngRowid ){
350 sqlite3ExprCodeAndCache(pParse, pRowidExpr);
351 }else{
352 sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
353 }
354 for(i=0; i<pTab->nCol; i++){
355 if( i==pTab->iPKey ){
356 sqlite3VdbeAddOp(v, OP_Null, 0, 0);
357 continue;
358 }
359 j = aXRef[i];
360 if( j<0 ){
361 sqlite3VdbeAddOp(v, OP_Column, iCur, i);
362 sqlite3ColumnDefault(v, pTab, i);
363 }else{
364 sqlite3ExprCodeAndCache(pParse, pChanges->a[j].pExpr);
365 }
366 }
367 sqlite3VdbeAddOp(v, OP_MakeRecord, pTab->nCol, 0);
368 if( !isView ){
369 sqlite3TableAffinityStr(v, pTab);
370 }
371 if( pParse->nErr ) goto update_cleanup;
372 sqlite3VdbeAddOp(v, OP_Insert, newIdx, 0);
373 if( !isView ){
374 sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
375 }
376
377 /* Fire the BEFORE and INSTEAD OF triggers
378 */
379 if( sqlite3CodeRowTrigger(pParse, TK_UPDATE, pChanges, TRIGGER_BEFORE, pTab,
380 newIdx, oldIdx, onError, addr) ){
381 goto update_cleanup;
382 }
383 }
384
385 if( !isView && !IsVirtual(pTab) ){
386 /*
387 ** Open every index that needs updating. Note that if any
388 ** index could potentially invoke a REPLACE conflict resolution
389 ** action, then we need to open all indices because we might need
390 ** to be deleting some records.
391 */
392 sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenWrite);
393 if( onError==OE_Replace ){
394 openAll = 1;
395 }else{
396 openAll = 0;
397 for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
398 if( pIdx->onError==OE_Replace ){
399 openAll = 1;
400 break;
401 }
402 }
403 }
404 for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
405 if( openAll || aIdxUsed[i] ){
406 KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
407 sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
408 sqlite3VdbeOp3(v, OP_OpenWrite, iCur+i+1, pIdx->tnum,
409 (char*)pKey, P3_KEYINFO_HANDOFF);
410 assert( pParse->nTab>iCur+i+1 );
411 }
412 }
413
414 /* Loop over every record that needs updating. We have to load
415 ** the old data for each record to be updated because some columns
416 ** might not change and we will need to copy the old value.
417 ** Also, the old data is needed to delete the old index entries.
418 ** So make the cursor point at the old record.
419 */
420 if( !triggers_exist ){
421 addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, 0);
422 sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
423 }
424 sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);
425
426 /* If the record number will change, push the record number as it
427 ** will be after the update. (The old record number is currently
428 ** on top of the stack.)
429 */
430 if( chngRowid ){
431 sqlite3ExprCode(pParse, pRowidExpr);
432 sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
433 }
434
435 /* Compute new data for this record.
436 */
437 for(i=0; i<pTab->nCol; i++){
438 if( i==pTab->iPKey ){
439 sqlite3VdbeAddOp(v, OP_Null, 0, 0);
440 continue;
441 }
442 j = aXRef[i];
443 if( j<0 ){
444 sqlite3VdbeAddOp(v, OP_Column, iCur, i);
445 sqlite3ColumnDefault(v, pTab, i);
446 }else{
447 sqlite3ExprCode(pParse, pChanges->a[j].pExpr);
448 }
449 }
450
451 /* Do constraint checks
452 */
453 sqlite3GenerateConstraintChecks(pParse, pTab, iCur, aIdxUsed, chngRowid, 1,
454 onError, addr);
455
456 /* Delete the old indices for the current record.
457 */
458 sqlite3GenerateRowIndexDelete(v, pTab, iCur, aIdxUsed);
459
460 /* If changing the record number, delete the old record.
461 */
462 if( chngRowid ){
463 sqlite3VdbeAddOp(v, OP_Delete, iCur, 0);
464 }
465
466 /* Create the new index entries and the new record.
467 */
468 sqlite3CompleteInsertion(pParse, pTab, iCur, aIdxUsed, chngRowid, 1, -1, 0);
469 }
470
471 /* Increment the row counter
472 */
473 if( db->flags & SQLITE_CountRows && !pParse->trigStack){
474 sqlite3VdbeAddOp(v, OP_MemIncr, 1, memCnt);
475 }
476
477 /* If there are triggers, close all the cursors after each iteration
478 ** through the loop. The fire the after triggers.
479 */
480 if( triggers_exist ){
481 if( !isView ){
482 for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
483 if( openAll || aIdxUsed[i] )
484 sqlite3VdbeAddOp(v, OP_Close, iCur+i+1, 0);
485 }
486 sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
487 }
488 if( sqlite3CodeRowTrigger(pParse, TK_UPDATE, pChanges, TRIGGER_AFTER, pTab,
489 newIdx, oldIdx, onError, addr) ){
490 goto update_cleanup;
491 }
492 }
493
494 /* Repeat the above with the next record to be updated, until
495 ** all record selected by the WHERE clause have been updated.
496 */
497 sqlite3VdbeAddOp(v, OP_Goto, 0, addr);
498 sqlite3VdbeJumpHere(v, addr);
499
500 /* Close all tables if there were no FOR EACH ROW triggers */
501 if( !triggers_exist ){
502 for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
503 if( openAll || aIdxUsed[i] ){
504 sqlite3VdbeAddOp(v, OP_Close, iCur+i+1, 0);
505 }
506 }
507 sqlite3VdbeAddOp(v, OP_Close, iCur, 0);
508 }else{
509 sqlite3VdbeAddOp(v, OP_Close, newIdx, 0);
510 sqlite3VdbeAddOp(v, OP_Close, oldIdx, 0);
511 }
512
513 /*
514 ** Return the number of rows that were changed. If this routine is
515 ** generating code because of a call to sqlite3NestedParse(), do not
516 ** invoke the callback function.
517 */
518 if( db->flags & SQLITE_CountRows && !pParse->trigStack && pParse->nested==0 ){
519 sqlite3VdbeAddOp(v, OP_MemLoad, memCnt, 0);
520 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
521 sqlite3VdbeSetNumCols(v, 1);
522 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "rows updated", P3_STATIC);
523 }
524
525update_cleanup:
526 sqlite3AuthContextPop(&sContext);
527 sqliteFree(apIdx);
528 sqliteFree(aXRef);
529 sqlite3SrcListDelete(pTabList);
530 sqlite3ExprListDelete(pChanges);
531 sqlite3ExprDelete(pWhere);
532 return;
533}
534
535#ifndef SQLITE_OMIT_VIRTUALTABLE
536/*
537** Generate code for an UPDATE of a virtual table.
538**
539** The strategy is that we create an ephemerial table that contains
540** for each row to be changed:
541**
542** (A) The original rowid of that row.
543** (B) The revised rowid for the row. (note1)
544** (C) The content of every column in the row.
545**
546** Then we loop over this ephemeral table and for each row in
547** the ephermeral table call VUpdate.
548**
549** When finished, drop the ephemeral table.
550**
551** (note1) Actually, if we know in advance that (A) is always the same
552** as (B) we only store (A), then duplicate (A) when pulling
553** it out of the ephemeral table before calling VUpdate.
554*/
555static void updateVirtualTable(
556 Parse *pParse, /* The parsing context */
557 SrcList *pSrc, /* The virtual table to be modified */
558 Table *pTab, /* The virtual table */
559 ExprList *pChanges, /* The columns to change in the UPDATE statement */
560 Expr *pRowid, /* Expression used to recompute the rowid */
561 int *aXRef, /* Mapping from columns of pTab to entries in pChanges */
562 Expr *pWhere /* WHERE clause of the UPDATE statement */
563){
564 Vdbe *v = pParse->pVdbe; /* Virtual machine under construction */
565 ExprList *pEList = 0; /* The result set of the SELECT statement */
566 Select *pSelect = 0; /* The SELECT statement */
567 Expr *pExpr; /* Temporary expression */
568 int ephemTab; /* Table holding the result of the SELECT */
569 int i; /* Loop counter */
570 int addr; /* Address of top of loop */
571
572 /* Construct the SELECT statement that will find the new values for
573 ** all updated rows.
574 */
575 pEList = sqlite3ExprListAppend(0, sqlite3CreateIdExpr("_rowid_"), 0);
576 if( pRowid ){
577 pEList = sqlite3ExprListAppend(pEList, sqlite3ExprDup(pRowid), 0);
578 }
579 assert( pTab->iPKey<0 );
580 for(i=0; i<pTab->nCol; i++){
581 if( aXRef[i]>=0 ){
582 pExpr = sqlite3ExprDup(pChanges->a[aXRef[i]].pExpr);
583 }else{
584 pExpr = sqlite3CreateIdExpr(pTab->aCol[i].zName);
585 }
586 pEList = sqlite3ExprListAppend(pEList, pExpr, 0);
587 }
588 pSelect = sqlite3SelectNew(pEList, pSrc, pWhere, 0, 0, 0, 0, 0, 0);
589
590 /* Create the ephemeral table into which the update results will
591 ** be stored.
592 */
593 assert( v );
594 ephemTab = pParse->nTab++;
595 sqlite3VdbeAddOp(v, OP_OpenEphemeral, ephemTab, pTab->nCol+1+(pRowid!=0));
596
597 /* fill the ephemeral table
598 */
599 sqlite3Select(pParse, pSelect, SRT_Table, ephemTab, 0, 0, 0, 0);
600
601 /*
602 ** Generate code to scan the ephemeral table and call VDelete and
603 ** VInsert
604 */
605 sqlite3VdbeAddOp(v, OP_Rewind, ephemTab, 0);
606 addr = sqlite3VdbeCurrentAddr(v);
607 sqlite3VdbeAddOp(v, OP_Column, ephemTab, 0);
608 if( pRowid ){
609 sqlite3VdbeAddOp(v, OP_Column, ephemTab, 1);
610 }else{
611 sqlite3VdbeAddOp(v, OP_Dup, 0, 0);
612 }
613 for(i=0; i<pTab->nCol; i++){
614 sqlite3VdbeAddOp(v, OP_Column, ephemTab, i+1+(pRowid!=0));
615 }
616 pParse->pVirtualLock = pTab;
617 sqlite3VdbeOp3(v, OP_VUpdate, 0, pTab->nCol+2,
618 (const char*)pTab->pVtab, P3_VTAB);
619 sqlite3VdbeAddOp(v, OP_Next, ephemTab, addr);
620 sqlite3VdbeJumpHere(v, addr-1);
621 sqlite3VdbeAddOp(v, OP_Close, ephemTab, 0);
622
623 /* Cleanup */
624 sqlite3SelectDelete(pSelect);
625}
626#endif /* SQLITE_OMIT_VIRTUALTABLE */

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