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Overview
| Comment: | Avoid ambiguous column name errors when the column name is in the USING clause of a join. Ticket #743. (CVS 2495) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
6a51bdeeff8312fa54fa2b1200f82342 |
| User & Date: | drh 2005-06-06 17:11:46 |
Context
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2005-06-06
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| 17:27 | Any non-zero value is considered TRUE in a WHERE clause. Ticket #1211. (CVS 2496) check-in: 0f7af623 user: drh tags: trunk | |
| 17:11 | Avoid ambiguous column name errors when the column name is in the USING clause of a join. Ticket #743. (CVS 2495) check-in: 6a51bdee user: drh tags: trunk | |
| 16:59 | Naming the join columns in the result set of a natural join does not result in an "ambiguous column name" error. Ticket #1217. (CVS 2494) check-in: 265fb607 user: drh tags: trunk | |
Changes
Changes to src/expr.c.
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains routines used for analyzing expressions and ** for generating VDBE code that evaluates expressions in SQLite. ** ** $Id: expr.c,v 1.203 2005/06/06 16:59:24 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* ** Return the 'affinity' of the expression pExpr if any. ** ................................................................................ if( 0==(cntTab++) ){ pExpr->iTable = pItem->iCursor; pExpr->iDb = pTab->iDb; pMatch = pItem; } for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){ if( sqlite3StrICmp(pCol->zName, zCol)==0 ){ cnt++; pExpr->iTable = pItem->iCursor; pMatch = pItem; pExpr->iDb = pTab->iDb; /* Substitute the rowid (column -1) for the INTEGER PRIMARY KEY */ pExpr->iColumn = j==pTab->iPKey ? -1 : j; pExpr->affinity = pTab->aCol[j].affinity; pExpr->pColl = pTab->aCol[j].pColl; if( pItem->jointype & JT_NATURAL ){ /* If this match occurred in the left table of a natural join, ** then skip the right table to avoid a duplicate match */ pItem++; i++; } break; } } } } |
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** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file contains routines used for analyzing expressions and ** for generating VDBE code that evaluates expressions in SQLite. ** ** $Id: expr.c,v 1.204 2005/06/06 17:11:46 drh Exp $ */ #include "sqliteInt.h" #include <ctype.h> /* ** Return the 'affinity' of the expression pExpr if any. ** ................................................................................ if( 0==(cntTab++) ){ pExpr->iTable = pItem->iCursor; pExpr->iDb = pTab->iDb; pMatch = pItem; } for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){ if( sqlite3StrICmp(pCol->zName, zCol)==0 ){ IdList *pUsing; cnt++; pExpr->iTable = pItem->iCursor; pMatch = pItem; pExpr->iDb = pTab->iDb; /* Substitute the rowid (column -1) for the INTEGER PRIMARY KEY */ pExpr->iColumn = j==pTab->iPKey ? -1 : j; pExpr->affinity = pTab->aCol[j].affinity; pExpr->pColl = pTab->aCol[j].pColl; if( pItem->jointype & JT_NATURAL ){ /* If this match occurred in the left table of a natural join, ** then skip the right table to avoid a duplicate match */ pItem++; i++; } if( (pUsing = pItem->pUsing)!=0 ){ /* If this match occurs on a column that is in the USING clause ** of a join, skip the search of the right table of the join ** to avoid a duplicate match there. */ int k; for(k=0; k<pUsing->nId; k++){ if( sqlite3StrICmp(pUsing->a[k].zName, zCol)==0 ){ pItem++; i++; break; } } } break; } } } } |
Changes to test/join.test.
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# May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. # # This file implements tests for joins, including outer joins. # # $Id: join.test,v 1.19 2005/06/06 16:59:24 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl do_test join-1.1 { execsql { CREATE TABLE t1(a,b,c); ................................................................................ } } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5} do_test join-1.4.4 { execsql2 { SELECT * FROM t1 AS x INNER JOIN t2 AS y USING(b,c); } } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5} do_test join-1.5 { execsql2 { SELECT * FROM t1 INNER JOIN t2 USING(b); } } {a 1 b 2 c 3 c 3 d 4 a 2 b 3 c 4 c 4 d 5} do_test join-1.6 { execsql2 { |
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# May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. # # This file implements tests for joins, including outer joins. # # $Id: join.test,v 1.20 2005/06/06 17:11:46 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl do_test join-1.1 { execsql { CREATE TABLE t1(a,b,c); ................................................................................ } } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5} do_test join-1.4.4 { execsql2 { SELECT * FROM t1 AS x INNER JOIN t2 AS y USING(b,c); } } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5} do_test join-1.4.5 { execsql { SELECT b FROM t1 JOIN t2 USING(b); } } {2 3} do_test join-1.5 { execsql2 { SELECT * FROM t1 INNER JOIN t2 USING(b); } } {a 1 b 2 c 3 c 3 d 4 a 2 b 3 c 4 c 4 d 5} do_test join-1.6 { execsql2 { |