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Overview
| Comment: | Always make sure WhereClause objects are initialized to zero when they are first allocated. (CVS 6073) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 7d0ae55d6b2d263382f034eb89bbc368 |
| User & Date: | drh 2008-12-29 23:45:07 |
Context
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2008-12-30
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| 06:24 | Invoke the authorization callback when compiling SAVEPOINT, ROLLBACK TO and RELEASE commands. (CVS 6074) check-in: e49807b1 user: danielk1977 tags: trunk | |
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2008-12-29
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| 23:45 | Always make sure WhereClause objects are initialized to zero when they are first allocated. (CVS 6073) check-in: 7d0ae55d user: drh tags: trunk | |
| 18:33 | Add test file where8.test. (CVS 6072) check-in: bff460ec user: danielk1977 tags: trunk | |
Changes
Changes to src/where.c.
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** This module contains C code that generates VDBE code used to process ** the WHERE clause of SQL statements. This module is responsible for ** generating the code that loops through a table looking for applicable ** rows. Indices are selected and used to speed the search when doing ** so is applicable. Because this module is responsible for selecting ** indices, you might also think of this module as the "query optimizer". ** ** $Id: where.c,v 1.349 2008/12/29 18:33:33 danielk1977 Exp $ */ #include "sqliteInt.h" /* ** Trace output macros */ #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) ................................................................................ /* ** Break the OR clause into its separate subterms. The subterms are ** stored in a WhereClause structure containing within the WhereOrInfo ** object that is attached to the original OR clause term. */ assert( (pTerm->wtFlags & (TERM_DYNAMIC|TERM_ORINFO|TERM_ANDINFO))==0 ); assert( pExpr->op==TK_OR ); pTerm->u.pOrInfo = pOrInfo = sqlite3DbMallocRaw(db, sizeof(*pOrInfo)); if( pOrInfo==0 ) return; pTerm->wtFlags |= TERM_ORINFO; pOrWc = &pOrInfo->wc; whereClauseInit(pOrWc, pWC->pParse, pMaskSet); whereSplit(pOrWc, pExpr, TK_OR); exprAnalyzeAll(pSrc, pOrWc); if( db->mallocFailed ) return; |
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** This module contains C code that generates VDBE code used to process ** the WHERE clause of SQL statements. This module is responsible for ** generating the code that loops through a table looking for applicable ** rows. Indices are selected and used to speed the search when doing ** so is applicable. Because this module is responsible for selecting ** indices, you might also think of this module as the "query optimizer". ** ** $Id: where.c,v 1.350 2008/12/29 23:45:07 drh Exp $ */ #include "sqliteInt.h" /* ** Trace output macros */ #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) ................................................................................ /* ** Break the OR clause into its separate subterms. The subterms are ** stored in a WhereClause structure containing within the WhereOrInfo ** object that is attached to the original OR clause term. */ assert( (pTerm->wtFlags & (TERM_DYNAMIC|TERM_ORINFO|TERM_ANDINFO))==0 ); assert( pExpr->op==TK_OR ); pTerm->u.pOrInfo = pOrInfo = sqlite3DbMallocZero(db, sizeof(*pOrInfo)); if( pOrInfo==0 ) return; pTerm->wtFlags |= TERM_ORINFO; pOrWc = &pOrInfo->wc; whereClauseInit(pOrWc, pWC->pParse, pMaskSet); whereSplit(pOrWc, pExpr, TK_OR); exprAnalyzeAll(pSrc, pOrWc); if( db->mallocFailed ) return; |