test/view.test

# 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 1.7 2002/07/02 13:05:05 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl

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 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
  sqlite db test.db
  execsql {
    SELECT * FROM v1 ORDER BY a;
  }
} {1 2 4 5 7 8}
do_test view-1.4 {
  catchsql {
    DROP VIEW 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: 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
  sqlite 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 {view v2 may not be modified}}
do_test view-2.3 {
  catchsql {
    UPDATE v2 SET a=10 WHERE a=5;
  }
} {1 {view v2 may not be modified}}
do_test view-2.4 {
  catchsql {
    DELETE FROM v2;
  }
} {1 {view v2 may not be modified}}
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 {
  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-3.4 {
  execsql2 {
    CREATE VIEW v3 AS SELECT a FROM t1 UNION SELECT b FROM t1 ORDER BY b;
    SELECT * FROM v3 LIMIT 4;
  }
} {b 2 b 3 b 5 b 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 y FROM v4 ORDER BY y LIMIT 4;
  }
} {y 2 y 3 y 5 y 6}


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, t2.y FROM t1 JOIN t2 USING(a);
    SELECT * FROM v5;
  }
} {1 22 4 55}

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}


finish_test