# 2002 February 26

#

# 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 VIEW statements.

#

# $Id: view.test,v 1.38 2008/08/21 14:54:29 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

# Omit this entire file if the library is not configured with views enabled.

ifcapable !view {

  finish_test

  return

}

do_test view-1.0 {

  execsql {

    CREATE TABLE t1(a,b,c);

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

    INSERT INTO t1 VALUES(4,5,6);

    INSERT INTO t1 VALUES(7,8,9);

    SELECT * FROM t1;

  }

} {1 2 3 4 5 6 7 8 9}

do_test view-1.1 {

  execsql {

    BEGIN;

    CREATE VIEW IF NOT EXISTS v1 AS SELECT a,b FROM t1;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 2 4 5 7 8}

do_test view-1.2 {

  catchsql {

    ROLLBACK;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 {no such table: v1}}

do_test view-1.3 {

  execsql {

    CREATE VIEW v1 AS SELECT a,b FROM t1;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 2 4 5 7 8}

do_test view-1.3.1 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM v1 ORDER BY a;

  }

} {1 2 4 5 7 8}

do_test view-1.4 {

  catchsql {

    DROP VIEW IF EXISTS v1;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 {no such table: v1}}

do_test view-1.5 {

  execsql {

    CREATE VIEW v1 AS SELECT a,b FROM t1;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 2 4 5 7 8}

do_test view-1.6 {

  catchsql {

    DROP TABLE t1;

    SELECT * FROM v1 ORDER BY a;

  }

} {1 {no such table: main.t1}}

do_test view-1.7 {

  execsql {

    CREATE TABLE t1(x,a,b,c);

    INSERT INTO t1 VALUES(1,2,3,4);

    INSERT INTO t1 VALUES(4,5,6,7);

    INSERT INTO t1 VALUES(7,8,9,10);

    SELECT * FROM v1 ORDER BY a;

  }

} {2 3 5 6 8 9}

do_test view-1.8 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM v1 ORDER BY a;

  }

} {2 3 5 6 8 9}

do_test view-2.1 {

  execsql {

    CREATE VIEW v2 AS SELECT * FROM t1 WHERE a>5

  };  # No semicolon

  execsql2 {

    SELECT * FROM v2;

  }

} {x 7 a 8 b 9 c 10}

do_test view-2.2 {

  catchsql {

    INSERT INTO v2 VALUES(1,2,3,4);

  }

} {1 {cannot modify v2 because it is a view}}

do_test view-2.3 {

  catchsql {

    UPDATE v2 SET a=10 WHERE a=5;

  }

} {1 {cannot modify v2 because it is a view}}

do_test view-2.4 {

  catchsql {

    DELETE FROM v2;

  }

} {1 {cannot modify v2 because it is a view}}

do_test view-2.5 {

  execsql {

    INSERT INTO t1 VALUES(11,12,13,14);

    SELECT * FROM v2 ORDER BY x;

  }

} {7 8 9 10 11 12 13 14}

do_test view-2.6 {

  execsql {

    SELECT x FROM v2 WHERE a>10

  }

} {11}

# Test that column name of views are generated correctly.

#

do_test view-3.1 {

  execsql2 {

    SELECT * FROM v1 LIMIT 1

  }

} {a 2 b 3}

do_test view-3.2 {

  execsql2 {

    SELECT * FROM v2 LIMIT 1

  }

} {x 7 a 8 b 9 c 10}

do_test view-3.3.1 {

  execsql2 {

    DROP VIEW v1;

    CREATE VIEW v1 AS SELECT a AS 'xyz', b+c AS 'pqr', c-b FROM t1;

    SELECT * FROM v1 LIMIT 1

  }

} {xyz 2 pqr 7 c-b 1}

do_test view-3.3.2 {

  execsql2 {

    CREATE VIEW v1b AS SELECT t1.a, b+c, t1.c FROM t1;

    SELECT * FROM v1b LIMIT 1

  }

} {a 2 b+c 7 c 4}

ifcapable compound {

do_test  view-3.4 {

  execsql2 {

    CREATE VIEW v3 AS SELECT a FROM t1 UNION SELECT b FROM t1 ORDER BY b;

    SELECT * FROM v3 LIMIT 4;

  }

} {a 2 a 3 a 5 a 6}

do_test view-3.5 {

  execsql2 {

    CREATE VIEW v4 AS 

      SELECT a, b FROM t1 

      UNION

      SELECT b AS 'x', a AS 'y' FROM t1

      ORDER BY x, y;

    SELECT b FROM v4 ORDER BY b LIMIT 4;

  }

} {b 2 b 3 b 5 b 6}

} ;# ifcapable compound

do_test view-4.1 {

  catchsql {

    DROP VIEW t1;

  }

} {1 {use DROP TABLE to delete table t1}}

do_test view-4.2 {

  execsql {

    SELECT 1 FROM t1 LIMIT 1;

  }

} 1

do_test view-4.3 {

  catchsql {

    DROP TABLE v1;

  }

} {1 {use DROP VIEW to delete view v1}}

do_test view-4.4 {

  execsql {

     SELECT 1 FROM v1 LIMIT 1;

  }

} {1}

do_test view-4.5 {

  catchsql {

    CREATE INDEX i1v1 ON v1(xyz);

  }

} {1 {views may not be indexed}}

do_test view-5.1 {

  execsql {

    CREATE TABLE t2(y,a);

    INSERT INTO t2 VALUES(22,2);

    INSERT INTO t2 VALUES(33,3);

    INSERT INTO t2 VALUES(44,4);

    INSERT INTO t2 VALUES(55,5);

    SELECT * FROM t2;

  }

} {22 2 33 3 44 4 55 5}

do_test view-5.2 {

  execsql {

    CREATE VIEW v5 AS

      SELECT t1.x AS v, t2.y AS w FROM t1 JOIN t2 USING(a);

    SELECT * FROM v5;

  }

} {1 22 4 55}

# Verify that the view v5 gets flattened.  see sqliteFlattenSubquery().

# This will only work if EXPLAIN is enabled.

# Ticket #272

#

ifcapable {explain} {

do_test view-5.3 {

  lsearch [execsql {

    EXPLAIN SELECT * FROM v5;

  }] OpenEphemeral

} {-1}

do_test view-5.4 {

  execsql {

    SELECT * FROM v5 AS a, t2 AS b WHERE a.w=b.y;

  }

} {1 22 22 2 4 55 55 5}

do_test view-5.5 {

  lsearch [execsql {

    EXPLAIN SELECT * FROM v5 AS a, t2 AS b WHERE a.w=b.y;

  }] OpenEphemeral

} {-1}

do_test view-5.6 {

  execsql {

    SELECT * FROM t2 AS b, v5 AS a WHERE a.w=b.y;

  }

} {22 2 1 22 55 5 4 55}

do_test view-5.7 {

  lsearch [execsql {

    EXPLAIN SELECT * FROM t2 AS b, v5 AS a WHERE a.w=b.y;

  }] OpenEphemeral

} {-1}

do_test view-5.8 {

  execsql {

    SELECT * FROM t1 AS a, v5 AS b, t2 AS c WHERE a.x=b.v AND b.w=c.y;

  }

} {1 2 3 4 1 22 22 2 4 5 6 7 4 55 55 5}

do_test view-5.9 {

  lsearch [execsql {

    EXPLAIN SELECT * FROM t1 AS a, v5 AS b, t2 AS c WHERE a.x=b.v AND b.w=c.y;

  }] OpenEphemeral

} {-1}

} ;# endif explain

do_test view-6.1 {

  execsql {

    SELECT min(x), min(a), min(b), min(c), min(a+b+c) FROM v2;

  }

} {7 8 9 10 27}

do_test view-6.2 {

  execsql {

    SELECT max(x), max(a), max(b), max(c), max(a+b+c) FROM v2;

  }

} {11 12 13 14 39}

do_test view-7.1 {

  execsql {

    CREATE TABLE test1(id integer primary key, a);

    CREATE TABLE test2(id integer, b);

    INSERT INTO test1 VALUES(1,2);

    INSERT INTO test2 VALUES(1,3);

    CREATE VIEW test AS

      SELECT test1.id, a, b

      FROM test1 JOIN test2 ON test2.id=test1.id;

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-7.2 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-7.3 {

  execsql {

    DROP VIEW test;

    CREATE VIEW test AS

      SELECT test1.id, a, b

      FROM test1 JOIN test2 USING(id);

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-7.4 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-7.5 {

  execsql {

    DROP VIEW test;

    CREATE VIEW test AS

      SELECT test1.id, a, b

      FROM test1 NATURAL JOIN test2;

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-7.6 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM test;

  }

} {1 2 3}

do_test view-8.1 {

  execsql {

    CREATE VIEW v6 AS SELECT pqr, xyz FROM v1;

    SELECT * FROM v6 ORDER BY xyz;

  }

} {7 2 13 5 19 8 27 12}

do_test view-8.2 {

  db close

  sqlite3 db test.db

  execsql {

    SELECT * FROM v6 ORDER BY xyz;

  }

} {7 2 13 5 19 8 27 12}

do_test view-8.3 {

  execsql {

    CREATE VIEW v7 AS SELECT pqr+xyz AS a FROM v6;

    SELECT * FROM v7 ORDER BY a;

  }

} {9 18 27 39}

ifcapable subquery {

  do_test view-8.4 {

    execsql {

      CREATE VIEW v8 AS SELECT max(cnt) AS mx FROM

        (SELECT a%2 AS eo, count(*) AS cnt FROM t1 GROUP BY eo);

      SELECT * FROM v8;

    }

  } 3

  do_test view-8.5 {

    execsql {

      SELECT mx+10, mx*2 FROM v8;

    }

  } {13 6}

  do_test view-8.6 {

    execsql {

      SELECT mx+10, pqr FROM v6, v8 WHERE xyz=2;

    }

  } {13 7}

  do_test view-8.7 {

    execsql {

      SELECT mx+10, pqr FROM v6, v8 WHERE xyz>2;

    }

  } {13 13 13 19 13 27}

} ;# ifcapable subquery

# Tests for a bug found by Michiel de Wit involving ORDER BY in a VIEW.

#

do_test view-9.1 {

  execsql {

    INSERT INTO t2 SELECT * FROM t2 WHERE a<5;

    INSERT INTO t2 SELECT * FROM t2 WHERE a<4;

    INSERT INTO t2 SELECT * FROM t2 WHERE a<3;

    SELECT DISTINCT count(*) FROM t2 GROUP BY a ORDER BY 1;

  }

} {1 2 4 8}

do_test view-9.2 {

  execsql {

    SELECT DISTINCT count(*) FROM t2 GROUP BY a ORDER BY 1 LIMIT 3;

  }

} {1 2 4}

do_test view-9.3 {

  execsql {

    CREATE VIEW v9 AS 

       SELECT DISTINCT count(*) FROM t2 GROUP BY a ORDER BY 1 LIMIT 3;

    SELECT * FROM v9;

  }

} {1 2 4}

do_test view-9.4 {

  execsql {

    SELECT * FROM v9 ORDER BY 1 DESC;

  }

} {4 2 1}

do_test view-9.5 {

  execsql {

    CREATE VIEW v10 AS 

       SELECT DISTINCT a, count(*) FROM t2 GROUP BY a ORDER BY 2 LIMIT 3;

    SELECT * FROM v10;

  }

} {5 1 4 2 3 4}

do_test view-9.6 {

  execsql {

    SELECT * FROM v10 ORDER BY 1;

  }

} {3 4 4 2 5 1}

# Tables with columns having peculiar quoted names used in views

# Ticket #756.

#

do_test view-10.1 {

  execsql {

    CREATE TABLE t3("9" integer, [4] text);

    INSERT INTO t3 VALUES(1,2);

    CREATE VIEW v_t3_a AS SELECT a.[9] FROM t3 AS a;

    CREATE VIEW v_t3_b AS SELECT "4" FROM t3;

    SELECT * FROM v_t3_a;

  }

} {1}

do_test view-10.2 {

  execsql {

    SELECT * FROM v_t3_b;

  }

} {2}

do_test view-11.1 {

  execsql {

    CREATE TABLE t4(a COLLATE NOCASE);

    INSERT INTO t4 VALUES('This');

    INSERT INTO t4 VALUES('this');

    INSERT INTO t4 VALUES('THIS');

    SELECT * FROM t4 WHERE a = 'THIS';

  }

} {This this THIS}

ifcapable subquery {

  do_test view-11.2 {

    execsql {

      SELECT * FROM (SELECT * FROM t4) WHERE a = 'THIS';

    }

  } {This this THIS}

}

do_test view-11.3 {

  execsql {

    CREATE VIEW v11 AS SELECT * FROM t4;

    SELECT * FROM v11 WHERE a = 'THIS';

  }

} {This this THIS}

# Ticket #1270:  Do not allow parameters in view definitions.

#

do_test view-12.1 {

  catchsql {

    CREATE VIEW v12 AS SELECT a FROM t1 WHERE b=?

  }

} {1 {parameters are not allowed in views}}

ifcapable attach {

  do_test view-13.1 {

    file delete -force test2.db

    catchsql {

      ATTACH 'test2.db' AS two;

      CREATE TABLE two.t2(x,y);

      CREATE VIEW v13 AS SELECT y FROM two.t2;

    }

  } {1 {view v13 cannot reference objects in database two}}

}

# Ticket #1658

#

do_test view-14.1 {

  catchsql {

    CREATE TEMP VIEW t1 AS SELECT a,b FROM t1;

    SELECT * FROM temp.t1;

  }

} {1 {view t1 is circularly defined}}

# Tickets #1688, #1709

#

do_test view-15.1 {

  execsql2 {

    CREATE VIEW v15 AS SELECT a AS x, b AS y FROM t1;

    SELECT * FROM v15 LIMIT 1;

  }

} {x 2 y 3}

do_test view-15.2 {

  execsql2 {

    SELECT x, y FROM v15 LIMIT 1

  }

} {x 2 y 3}

do_test view-16.1 {

  catchsql {

    CREATE VIEW IF NOT EXISTS v1 AS SELECT * FROM t1;

  }

} {0 {}}

do_test view-16.2 {

  execsql {

    SELECT sql FROM sqlite_master WHERE name='v1'

  }

} {{CREATE VIEW v1 AS SELECT a AS 'xyz', b+c AS 'pqr', c-b FROM t1}}

do_test view-16.3 {

  catchsql {

    DROP VIEW IF EXISTS nosuchview

  }

} {0 {}}

# correct error message when attempting to drop a view that does not

# exist.

#

do_test view-17.1 {

  catchsql {

    DROP VIEW nosuchview

  }

} {1 {no such view: nosuchview}}

do_test view-17.2 {

  catchsql {

    DROP VIEW main.nosuchview

  }

} {1 {no such view: main.nosuchview}}

do_test view-18.1 {

  execsql {

    DROP VIEW t1;

    DROP TABLE t1;

    CREATE TABLE t1(a, b, c);

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