SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.489 2008/12/05 00:00:07 drh Exp $
*/
#include "sqliteInt.h"


/*
** Delete all the content of a Select structure but do not deallocate
** the select structure itself.

            ** result-set list.
            */
            if( IsHiddenColumn(&pTab->aCol[j]) ){
              assert(IsVirtual(pTab));
              continue;
            }

            if( i>0 && zTName==0 ){
              struct SrcList_item *pLeft = &pTabList->a[i-1];
              if( (pLeft[1].jointype & JT_NATURAL)!=0 &&
                        columnIndex(pLeft->pTab, zName)>=0 ){
                /* In a NATURAL join, omit the join columns from the 
                ** table on the right */
                continue;
              }

#    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 1.26 2008/12/05 00:00:07 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_test join-1.1 {
  execsql {
    CREATE TABLE t1(a,b,c);

  }
} {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}
do_test join-1.3.4 {
  execsql {
    SELECT b FROM t1 NATURAL JOIN t2;
  }
} {2 3}

# ticket #3522
do_test join-1.3.5 {
  execsql2 {
    SELECT t2.* FROM t2 NATURAL JOIN t1
  }
} {b 2 c 3 d 4 b 3 c 4 d 5}
do_test join-1.3.6 {
  execsql2 {
    SELECT xyzzy.* FROM t2 AS xyzzy NATURAL JOIN t1
  }
} {b 2 c 3 d 4 b 3 c 4 d 5}
do_test join-1.3.7 {
  execsql2 {
    SELECT t1.* FROM t2 NATURAL JOIN t1
  }
} {a 1 b 2 c 3 a 2 b 3 c 4}
do_test join-1.3.8 {
  execsql2 {
    SELECT xyzzy.* FROM t2 NATURAL JOIN t1 AS xyzzy
  }
} {a 1 b 2 c 3 a 2 b 3 c 4}
do_test join-1.3.9 {
  execsql2 {
    SELECT aaa.*, bbb.* FROM t2 AS aaa NATURAL JOIN t1 AS bbb
  }
} {b 2 c 3 d 4 a 1 b 2 c 3 b 3 c 4 d 5 a 2 b 3 c 4}
do_test join-1.3.10 {
  execsql2 {
    SELECT t1.*, t2.* FROM t2 NATURAL JOIN t1
  }
} {a 1 b 2 c 3 b 2 c 3 d 4 a 2 b 3 c 4 b 3 c 4 d 5}


do_test join-1.4.1 {
  execsql2 {
    SELECT * FROM t1 INNER JOIN t2 USING(b,c);
  }
} {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
do_test join-1.4.2 {
  execsql2 {

  }
} {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}

# Ticket #3522
do_test join-1.4.6 {
  execsql2 {
    SELECT t1.* FROM t1 JOIN t2 USING(b);
  }
} {a 1 b 2 c 3 a 2 b 3 c 4}
do_test join-1.4.7 {
  execsql2 {
    SELECT t2.* FROM t1 JOIN t2 USING(b);
  }
} {b 2 c 3 d 4 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 {

} {1 2 3 4 5}

do_test join-2.1 {
  execsql {
    SELECT * FROM t1 NATURAL LEFT JOIN t2;
  }
} {1 2 3 4 2 3 4 5 3 4 5 {}}

# ticket #3522
do_test join-2.1.1 {
  execsql2 {
    SELECT * FROM t1 NATURAL LEFT JOIN t2;
  }
} {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5 a 3 b 4 c 5 d {}}
do_test join-2.1.2 {
  execsql2 {
    SELECT t1.* FROM t1 NATURAL LEFT JOIN t2;
  }
} {a 1 b 2 c 3 a 2 b 3 c 4 a 3 b 4 c 5}
do_test join-2.1.3 {
  execsql2 {
    SELECT t2.* FROM t1 NATURAL LEFT JOIN t2;
  }
} {b 2 c 3 d 4 b 3 c 4 d 5 b {} c {} d {}}

do_test join-2.2 {
  execsql {
    SELECT * FROM t2 NATURAL LEFT OUTER JOIN t1;
  }
} {1 2 3 {} 2 3 4 1 3 4 5 2}
do_test join-2.3 {
  catchsql {

# 2008 December 4
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    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.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file is a verification that the bugs identified in ticket
# #3522 have been fixed.
#
# $Id: tkt3522.test,v 1.1 2008/12/05 00:00:07 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_test tkt3522-1.1 {
  db eval {
    CREATE TABLE tab4(
       col0 INTEGER,
       col1 INTEGER,
       col2 INTEGER,
       col3 INTEGER,
       col4 INTEGER
    );
    SELECT cor1.*
      FROM tab4 AS cor0
      JOIN tab4 AS cor1 USING ( col4, col3, col2, col1, col0 );
  }
} {}
do_test tkt3522-1.2 {
  db eval {
    CREATE TABLE tab1(col0 INTEGER);
    CREATE TABLE tab2(col0 INTEGER);
    SELECT cor0.* FROM tab1 NATURAL JOIN tab2 AS cor0;
  }
} {}

finish_test