xref: /sqlite-3.40.0/test/select5.test (revision b19a2bc6) 
1# 2001 September 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# This file implements regression tests for SQLite library.  The
12# focus of this file is testing aggregate functions and the
13# GROUP BY and HAVING clauses of SELECT statements.
14#
15# $Id: select5.test,v 1.5 2001/09/16 00:13:28 drh Exp $
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20# Build some test data
21#
22set fd [open data1.txt w]
23for {set i 1} {$i<32} {incr i} {
24  for {set j 0} {pow(2,$j)<$i} {incr j} {}
25  puts $fd "[expr {32-$i}]\t[expr {10-$j}]"
26}
27close $fd
28execsql {
29  CREATE TABLE t1(x int, y int);
30  COPY t1 FROM 'data1.txt'
31}
32file delete data1.txt
33
34do_test select5-1.0 {
35  execsql {SELECT DISTINCT y FROM t1 ORDER BY y}
36} {5 6 7 8 9 10}
37
38# Sort by an aggregate function.
39#
40do_test select5-1.1 {
41  execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY y}
42} {5 15 6 8 7 4 8 2 9 1 10 1}
43do_test select5-1.2 {
44  execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY count(*), y}
45} {9 1 10 1 8 2 7 4 6 8 5 15}
46do_test select5-1.3 {
47  execsql {SELECT count(*), y FROM t1 GROUP BY y ORDER BY count(*), y}
48} {1 9 1 10 2 8 4 7 8 6 15 5}
49
50# Some error messages associated with aggregates and GROUP BY
51#
52do_test select5-2.1 {
53  set v [catch {execsql {
54    SELECT y, count(*) FROM t1 GROUP BY z ORDER BY y
55  }} msg]
56  lappend v $msg
57} {1 {no such column: z}}
58do_test select5-2.2 {
59  set v [catch {execsql {
60    SELECT y, count(*) FROM t1 GROUP BY z(y) ORDER BY y
61  }} msg]
62  lappend v $msg
63} {1 {no such function: z}}
64do_test select5-2.3 {
65  set v [catch {execsql {
66    SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<3 ORDER BY y
67  }} msg]
68  lappend v $msg
69} {0 {8 2 9 1 10 1}}
70do_test select5-2.4 {
71  set v [catch {execsql {
72    SELECT y, count(*) FROM t1 GROUP BY y HAVING z(y)<3 ORDER BY y
73  }} msg]
74  lappend v $msg
75} {1 {no such function: z}}
76do_test select5-2.5 {
77  set v [catch {execsql {
78    SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<z ORDER BY y
79  }} msg]
80  lappend v $msg
81} {1 {no such column: z}}
82
83# Get the Agg function to rehash in vdbe.c
84#
85do_test select5-3.1 {
86  execsql {
87    SELECT x, count(*), avg(y) FROM t1 GROUP BY x HAVING x<4 ORDER BY x
88  }
89} {1 1 5 2 1 5 3 1 5}
90
91# Run the AVG() function when the count is zero.
92#
93do_test select5-4.1 {
94  execsql {
95    SELECT avg(x) FROM t1 WHERE x>100
96  }
97} {}
98
99finish_test
100