gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/tkt2942.test (about)

     1  # 2008 February 15
     2  #
     3  # The author disclaims copyright to this source code.  In place of
     4  # a legal notice, here is a blessing:
     5  #
     6  #    May you do good and not evil.
     7  #    May you find forgiveness for yourself and forgive others.
     8  #    May you share freely, never taking more than you give.
     9  #
    10  #***********************************************************************
    11  #
    12  # Ticket #2942.  
    13  #
    14  # Queries of the form:
    15  #
    16  #     SELECT group_concat(x) FROM (SELECT * FROM table ORDER BY 1);
    17  #
    18  # The ORDER BY would be dropped by the query flattener.  This used
    19  # to not matter because aggregate functions sum(), min(), max(), avg(),
    20  # and so forth give the same result regardless of the order of inputs.
    21  # But with the addition of the group_concat() function, suddenly the
    22  # order does matter.
    23  #
    24  # $Id: tkt2942.test,v 1.1 2008/02/15 14:33:04 drh Exp $
    25  #
    26  
    27  set testdir [file dirname $argv0]
    28  source $testdir/tester.tcl
    29  
    30  ifcapable !subquery {
    31    finish_test
    32    return
    33  }
    34  
    35  do_test tkt2942.1 {
    36    execsql {
    37      create table t1(num int);
    38      insert into t1 values (2);
    39      insert into t1 values (1);
    40      insert into t1 values (3);
    41      insert into t1 values (4);
    42      SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num DESC);
    43    }
    44  } {4,3,2,1}
    45  do_test tkt2942.2 {
    46    execsql {
    47      SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY num);
    48    }
    49  } {1,2,3,4}
    50  do_test tkt2942.3 {
    51    execsql {
    52      SELECT group_concat(num) FROM (SELECT num FROM t1);
    53    }
    54  } {2,1,3,4}
    55  do_test tkt2942.4 {
    56    execsql {
    57      SELECT group_concat(num) FROM (SELECT num FROM t1 ORDER BY rowid DESC);
    58    }
    59  } {4,3,1,2}
    60  
    61  
    62  finish_test