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Overview
| Comment: | Make sure the 6th parameter to the authorizer callback for view subqueries has the correct view name. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
2a45bbc9fd1c64f1c4c4dac38f063cd6 |
| User & Date: | drh 2017-09-29 12:44:52 |
Context
|
2017-09-29
| ||
| 16:07 | Clean up the comments on the query flattener to more clearly and accurately express the conditions under which the flattener is able to run. check-in: 0840f9f8 user: drh tags: trunk | |
| 14:31 | Merge changes from trunk. check-in: 06f432fb user: drh tags: prefer-coroutine-sort-subquery | |
| 12:44 | Make sure the 6th parameter to the authorizer callback for view subqueries has the correct view name. check-in: 2a45bbc9 user: drh tags: trunk | |
| 12:12 | Better names for subqueries in EXPLAIN comments. check-in: 04ef40a8 user: drh tags: trunk | |
Changes
Changes to src/select.c.
5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 .... 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 .... 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 .... 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 |
** (1) Authorized unreferenced tables
** (2) Generate code for all sub-queries
*/
for(i=0; i<pTabList->nSrc; i++){
struct SrcList_item *pItem = &pTabList->a[i];
SelectDest dest;
Select *pSub;
/* Issue SQLITE_READ authorizations with a fake column name for any
** tables that are referenced but from which no values are extracted.
** Examples of where these kinds of null SQLITE_READ authorizations
** would occur:
**
** SELECT count(*) FROM t1; -- SQLITE_READ t1.""
................................................................................
#if SELECTTRACE_ENABLED
if( sqlite3SelectTrace & 0x100 ){
SELECTTRACE(0x100,pParse,p,("After WHERE-clause push-down:\n"));
sqlite3TreeViewSelect(0, p, 0);
}
#endif
}
/* Generate code to implement the subquery
**
** The subquery is implemented as a co-routine if all of these are true:
** (1) The subquery is guaranteed to be the outer loop (so that it
** does not need to be computed more than once)
** (2) REMOVED (2017-09-28): The ALL keyword after SELECT is omitted.
................................................................................
/*** constraint removed: && (p->selFlags & SF_All)==0 (2) */
&& OptimizationEnabled(db, SQLITE_SubqCoroutine) /* (3) */
){
/* Implement a co-routine that will return a single row of the result
** set on each invocation.
*/
int addrTop = sqlite3VdbeCurrentAddr(v)+1;
pItem->regReturn = ++pParse->nMem;
sqlite3VdbeAddOp3(v, OP_InitCoroutine, pItem->regReturn, 0, addrTop);
VdbeComment((v, "%s", pItem->pTab->zName));
pItem->addrFillSub = addrTop;
sqlite3SelectDestInit(&dest, SRT_Coroutine, pItem->regReturn);
explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
sqlite3Select(pParse, pSub, &dest);
................................................................................
retAddr = sqlite3VdbeAddOp1(v, OP_Return, pItem->regReturn);
VdbeComment((v, "end %s", pItem->pTab->zName));
sqlite3VdbeChangeP1(v, topAddr, retAddr);
sqlite3ClearTempRegCache(pParse);
}
if( db->mallocFailed ) goto select_end;
pParse->nHeight -= sqlite3SelectExprHeight(p);
#endif
}
/* Various elements of the SELECT copied into local variables for
** convenience */
pEList = p->pEList;
pWhere = p->pWhere;
|
> > > > > > > > |
5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 .... 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 .... 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 .... 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 |
** (1) Authorized unreferenced tables
** (2) Generate code for all sub-queries
*/
for(i=0; i<pTabList->nSrc; i++){
struct SrcList_item *pItem = &pTabList->a[i];
SelectDest dest;
Select *pSub;
#if !defined(SQLITE_OMIT_SUBQUERY) || !defined(SQLITE_OMIT_VIEW)
const char *zSavedAuthContext;
#endif
/* Issue SQLITE_READ authorizations with a fake column name for any
** tables that are referenced but from which no values are extracted.
** Examples of where these kinds of null SQLITE_READ authorizations
** would occur:
**
** SELECT count(*) FROM t1; -- SQLITE_READ t1.""
................................................................................
#if SELECTTRACE_ENABLED
if( sqlite3SelectTrace & 0x100 ){
SELECTTRACE(0x100,pParse,p,("After WHERE-clause push-down:\n"));
sqlite3TreeViewSelect(0, p, 0);
}
#endif
}
zSavedAuthContext = pParse->zAuthContext;
pParse->zAuthContext = pItem->zName;
/* Generate code to implement the subquery
**
** The subquery is implemented as a co-routine if all of these are true:
** (1) The subquery is guaranteed to be the outer loop (so that it
** does not need to be computed more than once)
** (2) REMOVED (2017-09-28): The ALL keyword after SELECT is omitted.
................................................................................
/*** constraint removed: && (p->selFlags & SF_All)==0 (2) */
&& OptimizationEnabled(db, SQLITE_SubqCoroutine) /* (3) */
){
/* Implement a co-routine that will return a single row of the result
** set on each invocation.
*/
int addrTop = sqlite3VdbeCurrentAddr(v)+1;
pItem->regReturn = ++pParse->nMem;
sqlite3VdbeAddOp3(v, OP_InitCoroutine, pItem->regReturn, 0, addrTop);
VdbeComment((v, "%s", pItem->pTab->zName));
pItem->addrFillSub = addrTop;
sqlite3SelectDestInit(&dest, SRT_Coroutine, pItem->regReturn);
explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
sqlite3Select(pParse, pSub, &dest);
................................................................................
retAddr = sqlite3VdbeAddOp1(v, OP_Return, pItem->regReturn);
VdbeComment((v, "end %s", pItem->pTab->zName));
sqlite3VdbeChangeP1(v, topAddr, retAddr);
sqlite3ClearTempRegCache(pParse);
}
if( db->mallocFailed ) goto select_end;
pParse->nHeight -= sqlite3SelectExprHeight(p);
pParse->zAuthContext = zSavedAuthContext;
#endif
}
/* Various elements of the SELECT copied into local variables for
** convenience */
pEList = p->pEList;
pWhere = p->pWhere;
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