test/select4.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 UNION, INTERSECT and EXCEPT operators
# in SELECT statements.
#
# $Id: select4.test,v 1.4 2001/09/16 00:13:28 drh Exp $

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

# Build some test data
#
set fd [open data1.txt w]
for {set i 1} {$i<32} {incr i} {
  for {set j 0} {pow(2,$j)<$i} {incr j} {}
  puts $fd "$i\t$j"
}
close $fd
execsql {
  CREATE TABLE t1(n int, log int);
  COPY t1 FROM 'data1.txt'
}
file delete data1.txt

do_test select4-1.0 {
  execsql {SELECT DISTINCT log FROM t1 ORDER BY log}
} {0 1 2 3 4 5}

# Union All operator
#
do_test select4-1.1a {
  lsort [execsql {SELECT DISTINCT log FROM t1}]
} {0 1 2 3 4 5}
do_test select4-1.1b {
  lsort [execsql {SELECT n FROM t1 WHERE log=3}]
} {5 6 7 8}
do_test select4-1.1c {
  execsql {
    SELECT DISTINCT log FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }
} {0 1 2 3 4 5 5 6 7 8}
do_test select4-1.2 {
  execsql {
    SELECT log FROM t1 WHERE n IN 
      (SELECT DISTINCT log FROM t1 UNION ALL
       SELECT n FROM t1 WHERE log=3)
    ORDER BY log;
  }
} {0 1 2 2 3 3 3 3}
do_test select4-1.3 {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1 ORDER BY log
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {ORDER BY clause should come after UNION ALL not before}}

# Union operator
#
do_test select4-2.1 {
  execsql {
    SELECT DISTINCT log FROM t1
    UNION
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }
} {0 1 2 3 4 5 6 7 8}
do_test select4-2.2 {
  execsql {
    SELECT log FROM t1 WHERE n IN 
      (SELECT DISTINCT log FROM t1 UNION
       SELECT n FROM t1 WHERE log=3)
    ORDER BY log;
  }
} {0 1 2 2 3 3 3 3}
do_test select4-2.3 {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1 ORDER BY log
    UNION
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {ORDER BY clause should come after UNION not before}}

# Except operator
#
do_test select4-3.1 {
  execsql {
    SELECT DISTINCT log FROM t1
    EXCEPT
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }
} {0 1 2 3 4}
do_test select4-3.2 {
  execsql {
    SELECT log FROM t1 WHERE n IN 
      (SELECT DISTINCT log FROM t1 EXCEPT
       SELECT n FROM t1 WHERE log=3)
    ORDER BY log;
  }
} {0 1 2 2}
do_test select4-3.3 {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1 ORDER BY log
    EXCEPT
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {ORDER BY clause should come after EXCEPT not before}}

# Intersect operator
#
do_test select4-4.1 {
  execsql {
    SELECT DISTINCT log FROM t1
    INTERSECT
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }
} {5}
do_test select4-4.2 {
  execsql {
    SELECT log FROM t1 WHERE n IN 
      (SELECT DISTINCT log FROM t1 INTERSECT
       SELECT n FROM t1 WHERE log=3)
    ORDER BY log;
  }
} {3}
do_test select4-4.3 {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1 ORDER BY log
    INTERSECT
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {ORDER BY clause should come after INTERSECT not before}}

# Various error messages while processing UNION or INTERSECT
#
do_test select4-5.1 {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t2
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {no such table: t2}}
do_test select4-5.2 {
  set v [catch {execsql {
    SELECT DISTINCT log AS "xyzzy" FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY xyzzy;
  }} msg]
  lappend v $msg
} {0 {0 1 2 3 4 5 5 6 7 8}}
do_test select4-5.2b {
  set v [catch {execsql {
    SELECT DISTINCT log xyzzy FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY 'xyzzy';
  }} msg]
  lappend v $msg
} {0 {0 1 2 3 4 5 5 6 7 8}}
do_test select4-5.2c {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY 'xyzzy';
  }} msg]
  lappend v $msg
} {1 {ORDER BY term number 1 does not match any result column}}
do_test select4-5.2d {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1
    INTERSECT
    SELECT n FROM t1 WHERE log=3
    ORDER BY 'xyzzy';
  }} msg]
  lappend v $msg
} {1 {ORDER BY term number 1 does not match any result column}}
do_test select4-5.2e {
  set v [catch {execsql {
    SELECT DISTINCT log FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY n;
  }} msg]
  lappend v $msg
} {0 {0 1 2 3 4 5 5 6 7 8}}
do_test select4-5.3 {
  set v [catch {execsql {
    SELECT DISTINCT log, n FROM t1
    UNION ALL
    SELECT n FROM t1 WHERE log=3
    ORDER BY log;
  }} msg]
  lappend v $msg
} {1 {SELECTs to the left and right of UNION ALL do not have the same number of result columns}}
do_test select4-5.4 {
  set v [catch {execsql {
    SELECT log FROM t1 WHERE n=2
    UNION ALL
    SELECT log FROM t1 WHERE n=3
    UNION ALL
    SELECT log FROM t1 WHERE n=4
    UNION ALL
    SELECT log FROM t1 WHERE n=5
    ORDER BY log;
  }} msg]
  lappend v $msg
} {0 {1 2 2 3}}

do_test select4-6.1 {
  execsql {
    SELECT log, count(*) as cnt FROM t1 GROUP BY log
    UNION
    SELECT log, n FROM t1 WHERE n=7
    ORDER BY cnt, log;
  }
} {0 1 1 1 2 2 3 4 3 7 4 8 5 15}
do_test select4-6.2 {
  execsql {
    SELECT log, count(*) FROM t1 GROUP BY log
    UNION
    SELECT log, n FROM t1 WHERE n=7
    ORDER BY count(*), log;
  }
} {0 1 1 1 2 2 3 4 3 7 4 8 5 15}

finish_test