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Overview
| Comment: | Fix a bug in where.c causing a malfunction when an INDEXED BY clause specified an unusable index on other than the leftmost table in the FROM clause. Ticket #3560. (CVS 6076) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f8ff0212129ce602a1e1e9ad702c47b9 |
| User & Date: | danielk1977 2008-12-30 09:45:46 |
Context
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2008-12-30
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| 12:00 | Add a couple of extra tests for the "WHERE ... OR" optimization. (CVS 6077) check-in: 35c87585 user: danielk1977 tags: trunk | |
| 09:45 | Fix a bug in where.c causing a malfunction when an INDEXED BY clause specified an unusable index on other than the leftmost table in the FROM clause. Ticket #3560. (CVS 6076) check-in: f8ff0212 user: danielk1977 tags: trunk | |
| 06:36 | Fix a bug in README.tokenizers. Ticket #3559. (CVS 6075) check-in: b8898d13 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 1.350 2008/12/29 23:45:07 drh Exp $ */ #include "sqliteInt.h" /* ** Trace output macros */ #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) ................................................................................ } }else #endif { bestIndex(pParse, pWC, pTabItem, notReady, (i==0 && ppOrderBy) ? *ppOrderBy : 0, &sCost); } if( sCost.rCost<bestPlan.rCost ){ once = 1; bestPlan = sCost; bestJ = j; } if( doNotReorder ) break; } WHERETRACE(("*** Optimizer selects table %d for loop %d\n", bestJ, pLevel-pWInfo->a)); if( (bestPlan.plan.wsFlags & WHERE_ORDERBY)!=0 ){ *ppOrderBy = 0; } andFlags &= bestPlan.plan.wsFlags; pLevel->plan = bestPlan.plan; |
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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 1.351 2008/12/30 09:45:46 danielk1977 Exp $ */ #include "sqliteInt.h" /* ** Trace output macros */ #if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) ................................................................................ } }else #endif { bestIndex(pParse, pWC, pTabItem, notReady, (i==0 && ppOrderBy) ? *ppOrderBy : 0, &sCost); } if( once==0 || sCost.rCost<bestPlan.rCost ){ once = 1; bestPlan = sCost; bestJ = j; } if( doNotReorder ) break; } assert( once ); assert( notReady & getMask(pMaskSet, pTabList->a[bestJ].iCursor) ); WHERETRACE(("*** Optimizer selects table %d for loop %d\n", bestJ, pLevel-pWInfo->a)); if( (bestPlan.plan.wsFlags & WHERE_ORDERBY)!=0 ){ *ppOrderBy = 0; } andFlags &= bestPlan.plan.wsFlags; pLevel->plan = bestPlan.plan; |
Changes to test/indexedby.test.
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# # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # # $Id: indexedby.test,v 1.3 2008/10/06 16:18:40 danielk1977 Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Create a schema with some indexes. # do_test indexedby-1.1 { ................................................................................ do_test indexedby-8.5 { EQP { UPDATE t1 INDEXED BY i2 SET rowid=rowid+1 WHERE a = 5 AND b = 10} } {0 0 {TABLE t1 WITH INDEX i2}} do_test indexedby-8.6 { catchsql { UPDATE t1 INDEXED BY i2 SET rowid=rowid+1 WHERE a = 5} } {1 {cannot use index: i2}} finish_test |
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# # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # # $Id: indexedby.test,v 1.4 2008/12/30 09:45:46 danielk1977 Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Create a schema with some indexes. # do_test indexedby-1.1 { ................................................................................ do_test indexedby-8.5 { EQP { UPDATE t1 INDEXED BY i2 SET rowid=rowid+1 WHERE a = 5 AND b = 10} } {0 0 {TABLE t1 WITH INDEX i2}} do_test indexedby-8.6 { catchsql { UPDATE t1 INDEXED BY i2 SET rowid=rowid+1 WHERE a = 5} } {1 {cannot use index: i2}} # Test that bug #3560 is fixed. # do_test indexedby-9.1 { execsql { CREATE TABLE maintable( id integer); CREATE TABLE joinme(id_int integer, id_text text); CREATE INDEX joinme_id_text_idx on joinme(id_text); CREATE INDEX joinme_id_int_idx on joinme(id_int); } } {} do_test indexedby-9.2 { catchsql { select * from maintable as m inner join joinme as j indexed by joinme_id_text_idx on ( m.id = j.id_int) } } {1 {cannot use index: joinme_id_text_idx}} do_test indexedby-9.3 { catchsql { select * from maintable, joinme INDEXED by joinme_id_text_idx } } {1 {cannot use index: joinme_id_text_idx}} finish_test |