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Changes In Branch recursive-selectdup Excluding Merge-Ins
This is equivalent to a diff from 8e03a8e95f to f5306ad681
2017-02-03
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20:54 | Improved performance and stack usage when processing VALUES clauses with a very large number of rows. (check-in: 5706d4708a user: drh tags: trunk) | |
19:16 | Avoid a performance problem when very large "VALUES(..), (..), (..)" terms are used in queries. (Closed-Leaf check-in: f5306ad681 user: dan tags: recursive-selectdup) | |
15:16 | Improved tests for the carray() table-valued function. (check-in: 83a099f139 user: drh tags: trunk) | |
14:44 | Modify the sqlite3SelectDup() routine to avoid recursing on Select.pPrior. (check-in: a7674ead5b user: dan tags: recursive-selectdup) | |
2017-02-02
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23:57 | Add the sqlite3_blob_reset() interface. Enhance the behavior of sqlite3_blob objects so that they can go active again after encountering an error by rerunning sqlite3_blob_reopen(). More work needed on the documentation. (check-in: 53b77838f0 user: drh tags: sqlite3_blob_reset) | |
20:32 | Ensure that all cursors have their positions saved prior to rolling back a savepoint. (check-in: 8e03a8e95f user: drh tags: trunk) | |
19:24 | Fix issues in the sha1 extension seen with MSVC. (check-in: 5a0da77c22 user: mistachkin tags: trunk) | |
00:46 | This is an experimental patch that ensures that all cursors have their position saved prior to starting a ROLLBACK TO. (Closed-Leaf check-in: 01d97e5b65 user: drh tags: savepoint-rollback) | |
Changes to src/expr.c.
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1414 1415 1416 1417 1418 1419 1420 | struct IdList_item *pNewItem = &pNew->a[i]; struct IdList_item *pOldItem = &p->a[i]; pNewItem->zName = sqlite3DbStrDup(db, pOldItem->zName); pNewItem->idx = pOldItem->idx; } return pNew; } | | > > > | > | | | | | | | | | | < | | | | | | | | | | | | > > > > > | | 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 | struct IdList_item *pNewItem = &pNew->a[i]; struct IdList_item *pOldItem = &p->a[i]; pNewItem->zName = sqlite3DbStrDup(db, pOldItem->zName); pNewItem->idx = pOldItem->idx; } return pNew; } Select *sqlite3SelectDup(sqlite3 *db, Select *pDup, int flags){ Select *pRet = 0; Select *pNext = 0; Select **pp = &pRet; Select *p; assert( db!=0 ); for(p=pDup; p; p=p->pPrior){ Select *pNew = sqlite3DbMallocRawNN(db, sizeof(*p) ); if( pNew==0 ) break; pNew->pEList = sqlite3ExprListDup(db, p->pEList, flags); pNew->pSrc = sqlite3SrcListDup(db, p->pSrc, flags); pNew->pWhere = sqlite3ExprDup(db, p->pWhere, flags); pNew->pGroupBy = sqlite3ExprListDup(db, p->pGroupBy, flags); pNew->pHaving = sqlite3ExprDup(db, p->pHaving, flags); pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, flags); pNew->op = p->op; pNew->pNext = pNext; pNew->pPrior = 0; pNew->pLimit = sqlite3ExprDup(db, p->pLimit, flags); pNew->pOffset = sqlite3ExprDup(db, p->pOffset, flags); pNew->iLimit = 0; pNew->iOffset = 0; pNew->selFlags = p->selFlags & ~SF_UsesEphemeral; pNew->addrOpenEphm[0] = -1; pNew->addrOpenEphm[1] = -1; pNew->nSelectRow = p->nSelectRow; pNew->pWith = withDup(db, p->pWith); sqlite3SelectSetName(pNew, p->zSelName); *pp = pNew; pp = &pNew->pPrior; pNext = pNew; } return pRet; } #else Select *sqlite3SelectDup(sqlite3 *db, Select *p, int flags){ assert( p==0 ); return 0; } #endif |
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Changes to src/select.c.
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4182 4183 4184 4185 4186 4187 4188 | return SQLITE_ERROR; } assert( pTab->nTabRef==1 || ((pSel->selFlags&SF_Recursive) && pTab->nTabRef==2 )); pCte->zCteErr = "circular reference: %s"; pSavedWith = pParse->pWith; pParse->pWith = pWith; | > > > > > > > | > | 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 | return SQLITE_ERROR; } assert( pTab->nTabRef==1 || ((pSel->selFlags&SF_Recursive) && pTab->nTabRef==2 )); pCte->zCteErr = "circular reference: %s"; pSavedWith = pParse->pWith; pParse->pWith = pWith; if( bMayRecursive ){ Select *pPrior = pSel->pPrior; assert( pPrior->pWith==0 ); pPrior->pWith = pSel->pWith; sqlite3WalkSelect(pWalker, pPrior); pPrior->pWith = 0; }else{ sqlite3WalkSelect(pWalker, pSel); } pParse->pWith = pWith; for(pLeft=pSel; pLeft->pPrior; pLeft=pLeft->pPrior); pEList = pLeft->pEList; if( pCte->pCols ){ if( pEList && pEList->nExpr!=pCte->pCols->nExpr ){ sqlite3ErrorMsg(pParse, "table %s has %d values for %d columns", |
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4226 4227 4228 4229 4230 4231 4232 | ** ** This function is used as the xSelectCallback2() callback by ** sqlite3SelectExpand() when walking a SELECT tree to resolve table ** names and other FROM clause elements. */ static void selectPopWith(Walker *pWalker, Select *p){ Parse *pParse = pWalker->pParse; | > | | | | > | 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 | ** ** This function is used as the xSelectCallback2() callback by ** sqlite3SelectExpand() when walking a SELECT tree to resolve table ** names and other FROM clause elements. */ static void selectPopWith(Walker *pWalker, Select *p){ Parse *pParse = pWalker->pParse; if( pParse->pWith && p->pPrior==0 ){ With *pWith = findRightmost(p)->pWith; if( pWith!=0 ){ assert( pParse->pWith==pWith ); pParse->pWith = pWith->pOuter; } } } #else #define selectPopWith 0 #endif /* |
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4279 4280 4281 4282 4283 4284 4285 | return WRC_Abort; } if( NEVER(p->pSrc==0) || (selFlags & SF_Expanded)!=0 ){ return WRC_Prune; } pTabList = p->pSrc; pEList = p->pEList; | | | | 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 | return WRC_Abort; } if( NEVER(p->pSrc==0) || (selFlags & SF_Expanded)!=0 ){ return WRC_Prune; } pTabList = p->pSrc; pEList = p->pEList; if( p->pWith ){ sqlite3WithPush(pParse, p->pWith, 0); } /* Make sure cursor numbers have been assigned to all entries in ** the FROM clause of the SELECT statement. */ sqlite3SrcListAssignCursors(pParse, pTabList); |
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4567 4568 4569 4570 4571 4572 4573 | w.xExprCallback = sqlite3ExprWalkNoop; w.pParse = pParse; if( pParse->hasCompound ){ w.xSelectCallback = convertCompoundSelectToSubquery; sqlite3WalkSelect(&w, pSelect); } w.xSelectCallback = selectExpander; | < | < | 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 | w.xExprCallback = sqlite3ExprWalkNoop; w.pParse = pParse; if( pParse->hasCompound ){ w.xSelectCallback = convertCompoundSelectToSubquery; sqlite3WalkSelect(&w, pSelect); } w.xSelectCallback = selectExpander; w.xSelectCallback2 = selectPopWith; sqlite3WalkSelect(&w, pSelect); } #ifndef SQLITE_OMIT_SUBQUERY /* ** This is a Walker.xSelectCallback callback for the sqlite3SelectTypeInfo() |
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