# 2005 January 19
#
# 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 script is testing correlated subqueries
#
# $Id: subquery.test,v 1.1 2005/01/21 02:34:44 drh Exp $
#

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

do_test subquery-1.1 {
  execsql {
    BEGIN;
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,2);
    INSERT INTO t1 VALUES(3,4);
    INSERT INTO t1 VALUES(5,6);
    INSERT INTO t1 VALUES(7,8);
    CREATE TABLE t2(x,y);
    INSERT INTO t2 VALUES(1,1);
    INSERT INTO t2 VALUES(3,9);
    INSERT INTO t2 VALUES(5,25);
    INSERT INTO t2 VALUES(7,49);
    COMMIT;
  }
  execsql {
    SELECT a, (SELECT y FROM t2 WHERE x=a) FROM t1 WHERE b<8
  }
} {1 1 3 9 5 25}
do_test subquery-1.2 {
  execsql {
    UPDATE t1 SET b=b+(SELECT y FROM t2 WHERE x=a);
    SELECT * FROM t1;
  }
} {1 3 3 13 5 31 7 57}

do_test subquery-1.3 {
  execsql {
    SELECT b FROM t1 WHERE EXISTS(SELECT * FROM t2 WHERE y=a)
  }
} {3}
do_test subquery-1.4 {
  execsql {
    SELECT b FROM t1 WHERE NOT EXISTS(SELECT * FROM t2 WHERE y=a)
  }
} {13 31 57}


finish_test