test/select6.test

# 2001 September 15
#
# 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.  The
# focus of this file is testing SELECT statements that contain
# subqueries in their FROM clause.
#
# $Id: select6.test,v 1.2 2002/02/18 13:35:33 drh Exp $

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

do_test select6-1.0 {
  execsql {
    BEGIN;
    CREATE TABLE t1(x, y);
    INSERT INTO t1 VALUES(1,1);
    INSERT INTO t1 VALUES(2,2);
    INSERT INTO t1 VALUES(3,2);
    INSERT INTO t1 VALUES(4,3);
    INSERT INTO t1 VALUES(5,3);
    INSERT INTO t1 VALUES(6,3);
    INSERT INTO t1 VALUES(7,3);
    INSERT INTO t1 VALUES(8,4);
    INSERT INTO t1 VALUES(9,4);
    INSERT INTO t1 VALUES(10,4);
    INSERT INTO t1 VALUES(11,4);
    INSERT INTO t1 VALUES(12,4);
    INSERT INTO t1 VALUES(13,4);
    INSERT INTO t1 VALUES(14,4);
    INSERT INTO t1 VALUES(15,4);
    INSERT INTO t1 VALUES(16,5);
    INSERT INTO t1 VALUES(17,5);
    INSERT INTO t1 VALUES(18,5);
    INSERT INTO t1 VALUES(19,5);
    INSERT INTO t1 VALUES(20,5);
    COMMIT;
    SELECT DISTINCT y FROM t1 ORDER BY y;
  }
} {1 2 3 4 5}

do_test select6-1.1 {
  execsql2 {SELECT * FROM (SELECT x, y FROM t1 WHERE x<2)}
} {x 1 y 1}
do_test select6-1.2 {
  execsql {SELECT count(*) FROM (SELECT y FROM t1)}
} {20}
do_test select6-1.3 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT y FROM t1)}
} {5}
do_test select6-1.4 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT * FROM (SELECT y FROM t1))}
} {5}
do_test select6-1.5 {
  execsql {SELECT count(*) FROM (SELECT * FROM (SELECT DISTINCT y FROM t1))}
} {5}

do_test select6-1.6 {
  execsql {
    SELECT * 
    FROM (SELECT count(*),y FROM t1 GROUP BY y) AS a,
         (SELECT max(x),y FROM t1 GROUP BY y) as b
    WHERE a.y=b.y ORDER BY a.y
  }
} {1 1 1 1 2 2 3 2 4 3 7 3 8 4 15 4 5 5 20 5}
do_test select6-1.7 {
  execsql {
    SELECT a.y, a.[count(*)], [max(x)], [count(*)]
    FROM (SELECT count(*),y FROM t1 GROUP BY y) AS a,
         (SELECT max(x),y FROM t1 GROUP BY y) as b
    WHERE a.y=b.y ORDER BY a.y
  }
} {1 1 1 1 2 2 3 2 3 4 7 4 4 8 15 8 5 5 20 5}
do_test select6-1.8 {
  execsql {
    SELECT q, p, r
    FROM (SELECT count(*) as p , y as q FROM t1 GROUP BY y) AS a,
         (SELECT max(x) as r, y as s FROM t1 GROUP BY y) as b
    WHERE q=s ORDER BY s
  }
} {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20}
do_test select6-1.9 {
  execsql {
    SELECT q, p, r, b.[min(x)+y]
    FROM (SELECT count(*) as p , y as q FROM t1 GROUP BY y) AS a,
         (SELECT max(x) as r, y as s, min(x)+y FROM t1 GROUP BY y) as b
    WHERE q=s ORDER BY s
  }
} {1 1 1 2 2 2 3 4 3 4 7 7 4 8 15 12 5 5 20 21}

do_test select6-2.0 {
  execsql {
    CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
    INSERT INTO t2 SELECT * FROM t1;
    SELECT DISTINCT b FROM t2 ORDER BY b;
  }
} {1 2 3 4 5}
do_test select6-2.1 {
  execsql2 {SELECT * FROM (SELECT a, b FROM t2 WHERE a<2)}
} {a 1 b 1}
do_test select6-2.2 {
  execsql {SELECT count(*) FROM (SELECT b FROM t2)}
} {20}
do_test select6-2.3 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT b FROM t2)}
} {5}
do_test select6-2.4 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT * FROM (SELECT b FROM t2))}
} {5}
do_test select6-2.5 {
  execsql {SELECT count(*) FROM (SELECT * FROM (SELECT DISTINCT b FROM t2))}
} {5}

do_test select6-2.6 {
  execsql {
    SELECT * 
    FROM (SELECT count(*),b FROM t2 GROUP BY b) AS a,
         (SELECT max(a),b FROM t2 GROUP BY b) as b
    WHERE a.b=b.b ORDER BY a.b
  }
} {1 1 1 1 2 2 3 2 4 3 7 3 8 4 15 4 5 5 20 5}
do_test select6-2.7 {
  execsql {
    SELECT a.b, a.[count(*)], [max(a)], [count(*)]
    FROM (SELECT count(*),b FROM t2 GROUP BY b) AS a,
         (SELECT max(a),b FROM t2 GROUP BY b) as b
    WHERE a.b=b.b ORDER BY a.b
  }
} {1 1 1 1 2 2 3 2 3 4 7 4 4 8 15 8 5 5 20 5}
do_test select6-2.8 {
  execsql {
    SELECT q, p, r
    FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY b) AS a,
         (SELECT max(a) as r, b as s FROM t2 GROUP BY b) as b
    WHERE q=s ORDER BY s
  }
} {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20}
do_test select6-2.9 {
  execsql {
    SELECT a.q, a.p, b.r
    FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY q) AS a,
         (SELECT max(a) as r, b as s FROM t2 GROUP BY s) as b
    WHERE a.q=b.s ORDER BY a.q
  }
} {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20}

do_test sqlite6-3.1 {
  execsql2 {
    SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE x=3));
  }
} {x 3 y 2}
do_test sqlite6-3.2 {
  execsql {
    SELECT * FROM
      (SELECT a.q, a.p, b.r
       FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY q) AS a,
            (SELECT max(a) as r, b as s FROM t2 GROUP BY s) as b
       WHERE a.q=b.s ORDER BY a.q)
    ORDER BY [a.q]
  }
} {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20}
finish_test