# 2002 May 24

#

# 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 implements tests for joins, including outer joins involving

# virtual tables. The test cases in this file are copied from the file

# join.test, and some of the comments still reflect that.

#

# $Id: vtab6.test,v 1.4 2008/07/12 14:52:21 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

ifcapable !vtab {

  finish_test

  return

}

register_echo_module [sqlite3_connection_pointer db]

execsql {

  CREATE TABLE real_t1(a,b,c);

  CREATE TABLE real_t2(b,c,d);

  CREATE TABLE real_t3(c,d,e);

  CREATE TABLE real_t4(d,e,f);

  CREATE TABLE real_t5(a INTEGER PRIMARY KEY);

  CREATE TABLE real_t6(a INTEGER);

  CREATE TABLE real_t7 (x, y);

  CREATE TABLE real_t8 (a integer primary key, b);

  CREATE TABLE real_t9(a INTEGER PRIMARY KEY, b);

  CREATE TABLE real_t10(x INTEGER PRIMARY KEY, y);

  CREATE TABLE real_t11(p INTEGER PRIMARY KEY, q);

  CREATE TABLE real_t12(a,b);

  CREATE TABLE real_t13(b,c);

  CREATE TABLE real_t21(a,b,c);

  CREATE TABLE real_t22(p,q);

}

foreach t [list t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t21 t22] {

  execsql "CREATE VIRTUAL TABLE $t USING echo(real_$t)"

}

do_test vtab6-1.1 {

  execsql {

    INSERT INTO t1 VALUES(1,2,3);

    INSERT INTO t1 VALUES(2,3,4);

    INSERT INTO t1 VALUES(3,4,5);

    SELECT * FROM t1;

  }  

} {1 2 3 2 3 4 3 4 5}

do_test vtab6-1.2 {

  execsql {

    INSERT INTO t2 VALUES(1,2,3);

    INSERT INTO t2 VALUES(2,3,4);

    INSERT INTO t2 VALUES(3,4,5);

    SELECT * FROM t2;

  }  

} {1 2 3 2 3 4 3 4 5}

do_test vtab6-1.3 {

  execsql2 {

    SELECT * FROM t1 NATURAL JOIN t2;

  }

} {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}

do_test vtab6-1.3.1 {

  execsql2 {

    SELECT * FROM t2 NATURAL JOIN t1;

  }

} {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}

do_test vtab6-1.3.2 {

  execsql2 {

    SELECT * FROM t2 AS x NATURAL JOIN t1;

  }

} {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}

do_test vtab6-1.3.3 {

  execsql2 {

    SELECT * FROM t2 NATURAL JOIN t1 AS y;

  }

} {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}

do_test vtab6-1.3.4 {

  execsql {

    SELECT b FROM t1 NATURAL JOIN t2;

  }

} {2 3}

do_test vtab6-1.4.1 {

  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 vtab6-1.4.2 {

  execsql2 {

    SELECT * FROM t1 AS x INNER JOIN t2 USING(b,c);

  }

} {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}

do_test vtab6-1.4.3 {

  execsql2 {

    SELECT * FROM t1 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 vtab6-1.4.4 {

  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 vtab6-1.4.5 {

  execsql {

    SELECT b FROM t1 JOIN t2 USING(b);

  }

} {2 3}

do_test vtab6-1.5 {

  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 vtab6-1.6 {

  execsql2 {

    SELECT * FROM t1 INNER JOIN t2 USING(c);

  }

} {a 1 b 2 c 3 b 2 d 4 a 2 b 3 c 4 b 3 d 5}

do_test vtab6-1.7 {

  execsql2 {

    SELECT * FROM t1 INNER JOIN t2 USING(c,b);

  }

} {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}

do_test vtab6-1.8 {

  execsql {

    SELECT * FROM t1 NATURAL CROSS JOIN t2;

  }

} {1 2 3 4 2 3 4 5}

do_test vtab6-1.9 {

  execsql {

    SELECT * FROM t1 CROSS JOIN t2 USING(b,c);

  }

} {1 2 3 4 2 3 4 5}

do_test vtab6-1.10 {

  execsql {

    SELECT * FROM t1 NATURAL INNER JOIN t2;

  }

} {1 2 3 4 2 3 4 5}

do_test vtab6-1.11 {

  execsql {

    SELECT * FROM t1 INNER JOIN t2 USING(b,c);

  }

} {1 2 3 4 2 3 4 5}

do_test vtab6-1.12 {

  execsql {

    SELECT * FROM t1 natural inner join t2;

  }

} {1 2 3 4 2 3 4 5}

ifcapable subquery {

  do_test vtab6-1.13 {

    execsql2 {

      SELECT * FROM t1 NATURAL JOIN 

        (SELECT b as 'c', c as 'd', d as 'e' FROM t2) as t3

    }

  } {a 1 b 2 c 3 d 4 e 5}

  do_test vtab6-1.14 {

    execsql2 {

      SELECT * FROM (SELECT b as 'c', c as 'd', d as 'e' FROM t2) as 'tx'

          NATURAL JOIN t1

    }

  } {c 3 d 4 e 5 a 1 b 2}

}

do_test vtab6-1.15 {

  execsql {

    INSERT INTO t3 VALUES(2,3,4);

    INSERT INTO t3 VALUES(3,4,5);

    INSERT INTO t3 VALUES(4,5,6);

    SELECT * FROM t3;

  }  

} {2 3 4 3 4 5 4 5 6}

do_test vtab6-1.16 {

  execsql {

    SELECT * FROM t1 natural join t2 natural join t3;

  }

} {1 2 3 4 5 2 3 4 5 6}

do_test vtab6-1.17 {

  execsql2 {

    SELECT * FROM t1 natural join t2 natural join t3;

  }

} {a 1 b 2 c 3 d 4 e 5 a 2 b 3 c 4 d 5 e 6}

do_test vtab6-1.18 {

  execsql {

    INSERT INTO t4 VALUES(2,3,4);

    INSERT INTO t4 VALUES(3,4,5);

    INSERT INTO t4 VALUES(4,5,6);

    SELECT * FROM t4;

  }  

} {2 3 4 3 4 5 4 5 6}

do_test vtab6-1.19.1 {

  execsql {

    SELECT * FROM t1 natural join t2 natural join t4;

  }

} {1 2 3 4 5 6}

do_test vtab6-1.19.2 {

  execsql2 {

    SELECT * FROM t1 natural join t2 natural join t4;

  }

} {a 1 b 2 c 3 d 4 e 5 f 6}

do_test vtab6-1.20 {

  execsql {

    SELECT * FROM t1 natural join t2 natural join t3 WHERE t1.a=1

  }

} {1 2 3 4 5}

do_test vtab6-2.1 {

  execsql {

    SELECT * FROM t1 NATURAL LEFT JOIN t2;

  }

} {1 2 3 4 2 3 4 5 3 4 5 {}}

do_test vtab6-2.2 {

  execsql {

    SELECT * FROM t2 NATURAL LEFT OUTER JOIN t1;

  }

} {1 2 3 {} 2 3 4 1 3 4 5 2}

do_test vtab6-2.3 {

  catchsql {

    SELECT * FROM t1 NATURAL RIGHT OUTER JOIN t2;

  }

} {1 {RIGHT and FULL OUTER JOINs are not currently supported}}

do_test vtab6-2.4 {

  execsql {

    SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d

  }

} {1 2 3 {} {} {} 2 3 4 {} {} {} 3 4 5 1 2 3}

do_test vtab6-2.5 {

  execsql {

    SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d WHERE t1.a>1

  }

} {2 3 4 {} {} {} 3 4 5 1 2 3}

do_test vtab6-2.6 {

  execsql {

    SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d WHERE t2.b IS NULL OR t2.b>1

  }

} {1 2 3 {} {} {} 2 3 4 {} {} {}}

do_test vtab6-3.1 {

  catchsql {

    SELECT * FROM t1 NATURAL JOIN t2 ON t1.a=t2.b;

  }

} {1 {a NATURAL join may not have an ON or USING clause}}

do_test vtab6-3.2 {

  catchsql {

    SELECT * FROM t1 NATURAL JOIN t2 USING(b);

  }

} {1 {a NATURAL join may not have an ON or USING clause}}

do_test vtab6-3.3 {

  catchsql {

    SELECT * FROM t1 JOIN t2 ON t1.a=t2.b USING(b);

  }

} {1 {cannot have both ON and USING clauses in the same join}}

do_test vtab6-3.4 {

  catchsql {

    SELECT * FROM t1 JOIN t2 USING(a);

  }

} {1 {cannot join using column a - column not present in both tables}}

do_test vtab6-3.5 {

  catchsql {

    SELECT * FROM t1 USING(a);

  }

} {0 {1 2 3 2 3 4 3 4 5}}

do_test vtab6-3.6 {

  catchsql {

    SELECT * FROM t1 JOIN t2 ON t3.a=t2.b;

  }

} {1 {no such column: t3.a}}

do_test vtab6-3.7 {

  catchsql {

    SELECT * FROM t1 INNER OUTER JOIN t2;

  }

} {1 {unknown or unsupported join type: INNER OUTER}}

do_test vtab6-3.7 {

  catchsql {

    SELECT * FROM t1 LEFT BOGUS JOIN t2;

  }

} {1 {unknown or unsupported join type: LEFT BOGUS}}

do_test vtab6-4.1 {

  execsql {

    BEGIN;

    INSERT INTO t6 VALUES(NULL);

    INSERT INTO t6 VALUES(NULL);

    INSERT INTO t6 SELECT * FROM t6;

    INSERT INTO t6 SELECT * FROM t6;

    INSERT INTO t6 SELECT * FROM t6;

    INSERT INTO t6 SELECT * FROM t6;

    INSERT INTO t6 SELECT * FROM t6;

    INSERT INTO t6 SELECT * FROM t6;

    COMMIT;

  }

  execsql {

    SELECT * FROM t6 NATURAL JOIN t5;

  }

} {}

do_test vtab6-4.2 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a<t5.a;

  }

} {}

do_test vtab6-4.3 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a>t5.a;

  }

} {}

do_test vtab6-4.4 {

  execsql {

    UPDATE t6 SET a='xyz';

    SELECT * FROM t6 NATURAL JOIN t5;

  }

} {}

do_test vtab6-4.6 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a<t5.a;

  }

} {}

do_test vtab6-4.7 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a>t5.a;

  }

} {}

do_test vtab6-4.8 {

  execsql {

    UPDATE t6 SET a=1;

    SELECT * FROM t6 NATURAL JOIN t5;

  }

} {}

do_test vtab6-4.9 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a<t5.a;

  }

} {}

do_test vtab6-4.10 {

  execsql {

    SELECT * FROM t6, t5 WHERE t6.a>t5.a;

  }

} {}

# A test for ticket #247.

#

do_test vtab6-7.1 {

  execsql {

    INSERT INTO t7 VALUES ("pa1", 1);

    INSERT INTO t7 VALUES ("pa2", NULL);

    INSERT INTO t7 VALUES ("pa3", NULL);

    INSERT INTO t7 VALUES ("pa4", 2);

    INSERT INTO t7 VALUES ("pa30", 131);

    INSERT INTO t7 VALUES ("pa31", 130);

    INSERT INTO t7 VALUES ("pa28", NULL);

    INSERT INTO t8 VALUES (1, "pa1");

    INSERT INTO t8 VALUES (2, "pa4");

    INSERT INTO t8 VALUES (3, NULL);

    INSERT INTO t8 VALUES (4, NULL);

    INSERT INTO t8 VALUES (130, "pa31");

    INSERT INTO t8 VALUES (131, "pa30");

    SELECT coalesce(t8.a,999) from t7 LEFT JOIN t8 on y=a;

  }

} {1 999 999 2 131 130 999}

# Make sure a left join where the right table is really a view that

# is itself a join works right.  Ticket #306.

#

ifcapable view {

do_test vtab6-8.1 {

  execsql {

    BEGIN;

    INSERT INTO t9 VALUES(1,11);

    INSERT INTO t9 VALUES(2,22);

    INSERT INTO t10 VALUES(1,2);

    INSERT INTO t10 VALUES(3,3);    

    INSERT INTO t11 VALUES(2,111);

    INSERT INTO t11 VALUES(3,333);    

    CREATE VIEW v10_11 AS SELECT x, q FROM t10, t11 WHERE t10.y=t11.p;

    COMMIT;

    SELECT * FROM t9 LEFT JOIN v10_11 ON( a=x );

  }

} {1 11 1 111 2 22 {} {}}

ifcapable subquery {

  do_test vtab6-8.2 {

    execsql {

      SELECT * FROM t9 LEFT JOIN (SELECT x, q FROM t10, t11 WHERE t10.y=t11.p)

           ON( a=x);

    }

  } {1 11 1 111 2 22 {} {}}

}

do_test vtab6-8.3 {

  execsql {

    SELECT * FROM v10_11 LEFT JOIN t9 ON( a=x );

  }

} {1 111 1 11 3 333 {} {}}

} ;# ifcapable view

# Ticket #350 describes a scenario where LEFT OUTER JOIN does not

# function correctly if the right table in the join is really

# subquery.

#

# To test the problem, we generate the same LEFT OUTER JOIN in two

# separate selects but with on using a subquery and the other calling

# the table directly.  Then connect the two SELECTs using an EXCEPT.

# Both queries should generate the same results so the answer should

# be an empty set.

#

ifcapable compound {

do_test vtab6-9.1 {

  execsql {

    BEGIN;

    INSERT INTO t12 VALUES(1,11);

    INSERT INTO t12 VALUES(2,22);

    INSERT INTO t13 VALUES(22,222);

    COMMIT;

  }

} {}

ifcapable subquery {

  do_test vtab6-9.1.1 {

    execsql {

      SELECT * FROM t12 NATURAL LEFT JOIN t13

      EXCEPT

      SELECT * FROM t12 NATURAL LEFT JOIN (SELECT * FROM t13 WHERE b>0);

    }

  } {}

}

ifcapable view {

  do_test vtab6-9.2 {

    execsql {

      CREATE VIEW v13 AS SELECT * FROM t13 WHERE b>0;

      SELECT * FROM t12 NATURAL LEFT JOIN t13

        EXCEPT

        SELECT * FROM t12 NATURAL LEFT JOIN v13;

    }

  } {}

} ;# ifcapable view

} ;# ifcapable compound

ifcapable subquery {

do_test vtab6-10.1 {

  execsql {

    CREATE INDEX i22 ON real_t22(q);

    SELECT a FROM t21 LEFT JOIN t22 ON b=p WHERE q=

       (SELECT max(m.q) FROM t22 m JOIN t21 n ON n.b=m.p WHERE n.c=1);

  }  

} {}

} ;# ifcapable subquery

do_test vtab6-11.1.0 {

  execsql {

    CREATE TABLE ab_r(a, b);

    CREATE TABLE bc_r(b, c);

    CREATE VIRTUAL TABLE ab USING echo(ab_r); 

    CREATE VIRTUAL TABLE bc USING echo(bc_r); 

    INSERT INTO ab VALUES(1, 2);

    INSERT INTO bc VALUES(2, 3);

  }

} {}

do_test vtab6-11.1.1 {

  execsql {

    SELECT a, b, c FROM ab NATURAL JOIN bc;

  }

} {1 2 3}

do_test vtab6-11.1.2 {

  execsql {

    SELECT a, b, c FROM bc NATURAL JOIN ab;

  }

} {1 2 3}

set ::echo_module_cost 1.0

do_test vtab6-11.1.3 {

  execsql {

    SELECT a, b, c FROM ab NATURAL JOIN bc;

  }

} {1 2 3}

do_test vtab6-11.1.4 {

  execsql {

    SELECT a, b, c FROM bc NATURAL JOIN ab;

  }

} {1 2 3}

do_test vtab6-11.2.0 {

  execsql {

    CREATE INDEX ab_i ON ab_r(b);

  }

} {}

unset ::echo_module_cost

do_test vtab6-11.2.1 {

  execsql {

    SELECT a, b, c FROM ab NATURAL JOIN bc;

  }

} {1 2 3}

do_test vtab6-11.2.2 {

  execsql {

    SELECT a, b, c FROM bc NATURAL JOIN ab;

  }

} {1 2 3}

set ::echo_module_cost 1.0

do_test vtab6-11.2.3 {

  execsql {

    SELECT a, b, c FROM ab NATURAL JOIN bc;

  }

} {1 2 3}

do_test vtab6-11.2.4 {

  execsql {

    SELECT a, b, c FROM bc NATURAL JOIN ab;

  }

} {1 2 3}

unset ::echo_module_cost

db close

sqlite3 db test.db