xref: /sqlite-3.40.0/test/distinctagg.test (revision 7aa3ebee) 
1# 2005 September 11
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# This file implements regression tests for SQLite library.  The
12# focus of this script is the DISTINCT modifier on aggregate functions.
13#
14# $Id: distinctagg.test,v 1.3 2009/02/09 13:19:28 drh Exp $
15
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20do_test distinctagg-1.1 {
21  execsql {
22    CREATE TABLE t1(a,b,c);
23    INSERT INTO t1 VALUES(1,2,3);
24    INSERT INTO t1 VALUES(1,3,4);
25    INSERT INTO t1 VALUES(1,3,5);
26    SELECT count(distinct a),
27           count(distinct b),
28           count(distinct c),
29           count(all a) FROM t1;
30  }
31} {1 2 3 3}
32do_test distinctagg-1.2 {
33  execsql {
34    SELECT b, count(distinct c) FROM t1 GROUP BY b ORDER BY b
35  }
36} {2 1 3 2}
37do_test distinctagg-1.3 {
38  execsql {
39    INSERT INTO t1 SELECT a+1, b+3, c+5 FROM t1;
40    INSERT INTO t1 SELECT a+2, b+6, c+10 FROM t1;
41    INSERT INTO t1 SELECT a+4, b+12, c+20 FROM t1;
42    SELECT count(*), count(distinct a), count(distinct b) FROM t1
43  }
44} {24 8 16}
45do_test distinctagg-1.4 {
46  execsql {
47    SELECT a, count(distinct c) FROM t1 GROUP BY a ORDER BY a
48  }
49} {1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3}
50
51do_test distinctagg-2.1 {
52  catchsql {
53    SELECT count(distinct) FROM t1;
54  }
55} {1 {DISTINCT aggregates must have exactly one argument}}
56do_test distinctagg-2.2 {
57  catchsql {
58    SELECT group_concat(distinct a,b) FROM t1;
59  }
60} {1 {DISTINCT aggregates must have exactly one argument}}
61
62finish_test
63