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: select3.test,v 1.23 2008/01/16 18:20:42 danielk1977 Exp $
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20# Build some test data
21#
22do_test select3-1.0 {
23  execsql {
24    CREATE TABLE t1(n int, log int);
25    BEGIN;
26  }
27  for {set i 1} {$i<32} {incr i} {
28    for {set j 0} {(1<<$j)<$i} {incr j} {}
29    execsql "INSERT INTO t1 VALUES($i,$j)"
30  }
31  execsql {
32    COMMIT
33  }
34  execsql {SELECT DISTINCT log FROM t1 ORDER BY log}
35} {0 1 2 3 4 5}
36
37# Basic aggregate functions.
38#
39do_test select3-1.1 {
40  execsql {SELECT count(*) FROM t1}
41} {31}
42do_test select3-1.2 {
43  execsql {
44    SELECT min(n),min(log),max(n),max(log),sum(n),sum(log),avg(n),avg(log)
45    FROM t1
46  }
47} {1 0 31 5 496 124 16.0 4.0}
48do_test select3-1.3 {
49  execsql {SELECT max(n)/avg(n), max(log)/avg(log) FROM t1}
50} {1.9375 1.25}
51
52# Try some basic GROUP BY clauses
53#
54do_test select3-2.1 {
55  execsql {SELECT log, count(*) FROM t1 GROUP BY log ORDER BY log}
56} {0 1 1 1 2 2 3 4 4 8 5 15}
57do_test select3-2.2 {
58  execsql {SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log}
59} {0 1 1 2 2 3 3 5 4 9 5 17}
60do_test select3-2.3.1 {
61  execsql {SELECT log, avg(n) FROM t1 GROUP BY log ORDER BY log}
62} {0 1.0 1 2.0 2 3.5 3 6.5 4 12.5 5 24.0}
63do_test select3-2.3.2 {
64  execsql {SELECT log, avg(n)+1 FROM t1 GROUP BY log ORDER BY log}
65} {0 2.0 1 3.0 2 4.5 3 7.5 4 13.5 5 25.0}
66do_test select3-2.4 {
67  execsql {SELECT log, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log}
68} {0 0.0 1 0.0 2 0.5 3 1.5 4 3.5 5 7.0}
69do_test select3-2.5 {
70  execsql {SELECT log*2+1, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log}
71} {1 0.0 3 0.0 5 0.5 7 1.5 9 3.5 11 7.0}
72do_test select3-2.6 {
73  execsql {
74    SELECT log*2+1 as x, count(*) FROM t1 GROUP BY x ORDER BY x
75  }
76} {1 1 3 1 5 2 7 4 9 8 11 15}
77do_test select3-2.7 {
78  execsql {
79    SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY y, x
80  }
81} {1 1 3 1 5 2 7 4 9 8 11 15}
82do_test select3-2.8 {
83  execsql {
84    SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY 10-(x+y)
85  }
86} {11 15 9 8 7 4 5 2 3 1 1 1}
87#do_test select3-2.9 {
88#  catchsql {
89#    SELECT log, count(*) FROM t1 GROUP BY 'x' ORDER BY log;
90#  }
91#} {1 {GROUP BY terms must not be non-integer constants}}
92do_test select3-2.10 {
93  catchsql {
94    SELECT log, count(*) FROM t1 GROUP BY 0 ORDER BY log;
95  }
96} {1 {1st GROUP BY term out of range - should be between 1 and 2}}
97do_test select3-2.11 {
98  catchsql {
99    SELECT log, count(*) FROM t1 GROUP BY 3 ORDER BY log;
100  }
101} {1 {1st GROUP BY term out of range - should be between 1 and 2}}
102do_test select3-2.12 {
103  catchsql {
104    SELECT log, count(*) FROM t1 GROUP BY 1 ORDER BY log;
105  }
106} {0 {0 1 1 1 2 2 3 4 4 8 5 15}}
107
108# Cannot have an empty GROUP BY
109do_test select3-2.13 {
110  catchsql {
111    SELECT log, count(*) FROM t1 GROUP BY ORDER BY log;
112  }
113} {1 {near "ORDER": syntax error}}
114do_test select3-2.14 {
115  catchsql {
116    SELECT log, count(*) FROM t1 GROUP BY;
117  }
118} {1 {near ";": syntax error}}
119
120# Cannot have a HAVING without a GROUP BY
121#
122do_test select3-3.1 {
123  set v [catch {execsql {SELECT log, count(*) FROM t1 HAVING log>=4}} msg]
124  lappend v $msg
125} {1 {a GROUP BY clause is required before HAVING}}
126
127# Toss in some HAVING clauses
128#
129do_test select3-4.1 {
130  execsql {SELECT log, count(*) FROM t1 GROUP BY log HAVING log>=4 ORDER BY log}
131} {4 8 5 15}
132do_test select3-4.2 {
133  execsql {
134    SELECT log, count(*) FROM t1 
135    GROUP BY log 
136    HAVING count(*)>=4 
137    ORDER BY log
138  }
139} {3 4 4 8 5 15}
140do_test select3-4.3 {
141  execsql {
142    SELECT log, count(*) FROM t1 
143    GROUP BY log 
144    HAVING count(*)>=4 
145    ORDER BY max(n)+0
146  }
147} {3 4 4 8 5 15}
148do_test select3-4.4 {
149  execsql {
150    SELECT log AS x, count(*) AS y FROM t1 
151    GROUP BY x
152    HAVING y>=4 
153    ORDER BY max(n)+0
154  }
155} {3 4 4 8 5 15}
156do_test select3-4.5 {
157  execsql {
158    SELECT log AS x FROM t1 
159    GROUP BY x
160    HAVING count(*)>=4 
161    ORDER BY max(n)+0
162  }
163} {3 4 5}
164
165do_test select3-5.1 {
166  execsql {
167    SELECT log, count(*), avg(n), max(n+log*2) FROM t1 
168    GROUP BY log 
169    ORDER BY max(n+log*2)+0, avg(n)+0
170  }
171} {0 1 1.0 1 1 1 2.0 4 2 2 3.5 8 3 4 6.5 14 4 8 12.5 24 5 15 24.0 41}
172do_test select3-5.2 {
173  execsql {
174    SELECT log, count(*), avg(n), max(n+log*2) FROM t1 
175    GROUP BY log 
176    ORDER BY max(n+log*2)+0, min(log,avg(n))+0
177  }
178} {0 1 1.0 1 1 1 2.0 4 2 2 3.5 8 3 4 6.5 14 4 8 12.5 24 5 15 24.0 41}
179
180# Test sorting of GROUP BY results in the presence of an index
181# on the GROUP BY column.
182#
183do_test select3-6.1 {
184  execsql {
185    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log;
186  }
187} {0 1 1 2 2 3 3 5 4 9 5 17}
188do_test select3-6.2 {
189  execsql {
190    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC;
191  }
192} {5 17 4 9 3 5 2 3 1 2 0 1}
193do_test select3-6.3 {
194  execsql {
195    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1;
196  }
197} {0 1 1 2 2 3 3 5 4 9 5 17}
198do_test select3-6.4 {
199  execsql {
200    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC;
201  }
202} {5 17 4 9 3 5 2 3 1 2 0 1}
203do_test select3-6.5 {
204  execsql {
205    CREATE INDEX i1 ON t1(log);
206    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log;
207  }
208} {0 1 1 2 2 3 3 5 4 9 5 17}
209do_test select3-6.6 {
210  execsql {
211    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC;
212  }
213} {5 17 4 9 3 5 2 3 1 2 0 1}
214do_test select3-6.7 {
215  execsql {
216    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1;
217  }
218} {0 1 1 2 2 3 3 5 4 9 5 17}
219do_test select3-6.8 {
220  execsql {
221    SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC;
222  }
223} {5 17 4 9 3 5 2 3 1 2 0 1}
224
225# Sometimes an aggregate query can return no rows at all.
226#
227do_test select3-7.1 {
228  execsql {
229    CREATE TABLE t2(a,b);
230    INSERT INTO t2 VALUES(1,2);
231    SELECT a, sum(b) FROM t2 WHERE b=5 GROUP BY a;
232  }
233} {}
234do_test select3-7.2 {
235  execsql {
236    SELECT a, sum(b) FROM t2 WHERE b=5;
237  }
238} {{} {}}
239
240# If a table column is of type REAL but we are storing integer values
241# in it, the values are stored as integers to take up less space.  The
242# values are converted by to REAL as they are read out of the table.
243# Make sure the GROUP BY clause does this conversion correctly.
244# Ticket #2251.
245#
246do_test select3-8.1 {
247  execsql {
248    CREATE TABLE A (
249      A1 DOUBLE,
250      A2 VARCHAR COLLATE NOCASE,
251      A3 DOUBLE
252    );
253    INSERT INTO A VALUES(39136,'ABC',1201900000);
254    INSERT INTO A VALUES(39136,'ABC',1207000000);
255    SELECT typeof(sum(a3)) FROM a;
256  }
257} {real}
258do_test select3-8.2 {
259  execsql {
260    SELECT typeof(sum(a3)) FROM a GROUP BY a1;
261  }
262} {real}
263
264finish_test
265