1
2#pragma ident	"%Z%%M%	%I%	%E% SMI"
3
4# 2001 September 15
5#
6# The author disclaims copyright to this source code.  In place of
7# a legal notice, here is a blessing:
8#
9#    May you do good and not evil.
10#    May you find forgiveness for yourself and forgive others.
11#    May you share freely, never taking more than you give.
12#
13#***********************************************************************
14# This file implements regression tests for SQLite library.  The
15# focus of this file is testing aggregate functions and the
16# GROUP BY and HAVING clauses of SELECT statements.
17#
18# $Id: select5.test,v 1.6 2001/10/15 00:44:36 drh Exp $
19
20set testdir [file dirname $argv0]
21source $testdir/tester.tcl
22
23# Build some test data
24#
25set fd [open data1.txt w]
26for {set i 1} {$i<32} {incr i} {
27  for {set j 0} {pow(2,$j)<$i} {incr j} {}
28  puts $fd "[expr {32-$i}]\t[expr {10-$j}]"
29}
30close $fd
31execsql {
32  CREATE TABLE t1(x int, y int);
33  COPY t1 FROM 'data1.txt'
34}
35file delete data1.txt
36
37do_test select5-1.0 {
38  execsql {SELECT DISTINCT y FROM t1 ORDER BY y}
39} {5 6 7 8 9 10}
40
41# Sort by an aggregate function.
42#
43do_test select5-1.1 {
44  execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY y}
45} {5 15 6 8 7 4 8 2 9 1 10 1}
46do_test select5-1.2 {
47  execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY count(*), y}
48} {9 1 10 1 8 2 7 4 6 8 5 15}
49do_test select5-1.3 {
50  execsql {SELECT count(*), y FROM t1 GROUP BY y ORDER BY count(*), y}
51} {1 9 1 10 2 8 4 7 8 6 15 5}
52
53# Some error messages associated with aggregates and GROUP BY
54#
55do_test select5-2.1 {
56  set v [catch {execsql {
57    SELECT y, count(*) FROM t1 GROUP BY z ORDER BY y
58  }} msg]
59  lappend v $msg
60} {1 {no such column: z}}
61do_test select5-2.2 {
62  set v [catch {execsql {
63    SELECT y, count(*) FROM t1 GROUP BY z(y) ORDER BY y
64  }} msg]
65  lappend v $msg
66} {1 {no such function: z}}
67do_test select5-2.3 {
68  set v [catch {execsql {
69    SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<3 ORDER BY y
70  }} msg]
71  lappend v $msg
72} {0 {8 2 9 1 10 1}}
73do_test select5-2.4 {
74  set v [catch {execsql {
75    SELECT y, count(*) FROM t1 GROUP BY y HAVING z(y)<3 ORDER BY y
76  }} msg]
77  lappend v $msg
78} {1 {no such function: z}}
79do_test select5-2.5 {
80  set v [catch {execsql {
81    SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<z ORDER BY y
82  }} msg]
83  lappend v $msg
84} {1 {no such column: z}}
85
86# Get the Agg function to rehash in vdbe.c
87#
88do_test select5-3.1 {
89  execsql {
90    SELECT x, count(*), avg(y) FROM t1 GROUP BY x HAVING x<4 ORDER BY x
91  }
92} {1 1 5 2 1 5 3 1 5}
93
94# Run various aggregate functions when the count is zero.
95#
96do_test select5-4.1 {
97  execsql {
98    SELECT avg(x) FROM t1 WHERE x>100
99  }
100} {{}}
101do_test select5-4.2 {
102  execsql {
103    SELECT count(x) FROM t1 WHERE x>100
104  }
105} {0}
106do_test select5-4.3 {
107  execsql {
108    SELECT min(x) FROM t1 WHERE x>100
109  }
110} {{}}
111do_test select5-4.4 {
112  execsql {
113    SELECT max(x) FROM t1 WHERE x>100
114  }
115} {{}}
116do_test select5-4.5 {
117  execsql {
118    SELECT sum(x) FROM t1 WHERE x>100
119  }
120} {0}
121
122finish_test
123