wasCSharpSQLite – Blame information for rev

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1 office 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.
12 #
13 # This file implements tests for proper treatment of the special
14 # value NULL.
15 #
16  
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19  
20 # Create a table and some data to work with.
21 #
22 do_test null-1.0 {
23 execsql {
24 begin;
25 create table t1(a,b,c);
26 insert into t1 values(1,0,0);
27 insert into t1 values(2,0,1);
28 insert into t1 values(3,1,0);
29 insert into t1 values(4,1,1);
30 insert into t1 values(5,null,0);
31 insert into t1 values(6,null,1);
32 insert into t1 values(7,null,null);
33 commit;
34 select * from t1;
35 }
36 } {1 0 0 2 0 1 3 1 0 4 1 1 5 {} 0 6 {} 1 7 {} {}}
37  
38 # Check for how arithmetic expressions handle NULL
39 #
40 do_test null-1.1 {
41 execsql {
42 select ifnull(a+b,99) from t1;
43 }
44 } {1 2 4 5 99 99 99}
45 do_test null-1.2 {
46 execsql {
47 select ifnull(b*c,99) from t1;
48 }
49 } {0 0 0 1 99 99 99}
50  
51 # Check to see how the CASE expression handles NULL values. The
52 # first WHEN for which the test expression is TRUE is selected.
53 # FALSE and UNKNOWN test expressions are skipped.
54 #
55 do_test null-2.1 {
56 execsql {
57 select ifnull(case when b<>0 then 1 else 0 end, 99) from t1;
58 }
59 } {0 0 1 1 0 0 0}
60 do_test null-2.2 {
61 execsql {
62 select ifnull(case when not b<>0 then 1 else 0 end, 99) from t1;
63 }
64 } {1 1 0 0 0 0 0}
65 do_test null-2.3 {
66 execsql {
67 select ifnull(case when b<>0 and c<>0 then 1 else 0 end, 99) from t1;
68 }
69 } {0 0 0 1 0 0 0}
70 do_test null-2.4 {
71 execsql {
72 select ifnull(case when not (b<>0 and c<>0) then 1 else 0 end, 99) from t1;
73 }
74 } {1 1 1 0 1 0 0}
75 do_test null-2.5 {
76 execsql {
77 select ifnull(case when b<>0 or c<>0 then 1 else 0 end, 99) from t1;
78 }
79 } {0 1 1 1 0 1 0}
80 do_test null-2.6 {
81 execsql {
82 select ifnull(case when not (b<>0 or c<>0) then 1 else 0 end, 99) from t1;
83 }
84 } {1 0 0 0 0 0 0}
85 do_test null-2.7 {
86 execsql {
87 select ifnull(case b when c then 1 else 0 end, 99) from t1;
88 }
89 } {1 0 0 1 0 0 0}
90 do_test null-2.8 {
91 execsql {
92 select ifnull(case c when b then 1 else 0 end, 99) from t1;
93 }
94 } {1 0 0 1 0 0 0}
95  
96 # Check to see that NULL values are ignored in aggregate functions.
97 #
98 do_test null-3.1 {
99 execsql {
100 select count(*), count(b), count(c), sum(b), sum(c),
101 avg(b), avg(c), min(b), max(b) from t1;
102 }
103 } {7 4 6 2 3 0.5 0.5 0 1}
104  
105 # The sum of zero entries is a NULL, but the total of zero entries is 0.
106 #
107 do_test null-3.2 {
108 execsql {
109 SELECT sum(b), total(b) FROM t1 WHERE b<0
110 }
111 } {{} 0.0}
112  
113 # Check to see how WHERE clauses handle NULL values. A NULL value
114 # is the same as UNKNOWN. The WHERE clause should only select those
115 # rows that are TRUE. FALSE and UNKNOWN rows are rejected.
116 #
117 do_test null-4.1 {
118 execsql {
119 select a from t1 where b<10
120 }
121 } {1 2 3 4}
122 do_test null-4.2 {
123 execsql {
124 select a from t1 where not b>10
125 }
126 } {1 2 3 4}
127 do_test null-4.3 {
128 execsql {
129 select a from t1 where b<10 or c=1;
130 }
131 } {1 2 3 4 6}
132 do_test null-4.4 {
133 execsql {
134 select a from t1 where b<10 and c=1;
135 }
136 } {2 4}
137 do_test null-4.5 {
138 execsql {
139 select a from t1 where not (b<10 and c=1);
140 }
141 } {1 3 5}
142  
143 # The DISTINCT keyword on a SELECT statement should treat NULL values
144 # as distinct
145 #
146 do_test null-5.1 {
147 execsql {
148 select distinct b from t1 order by b;
149 }
150 } {{} 0 1}
151  
152 # A UNION to two queries should treat NULL values
153 # as distinct.
154 #
155 # (Later:) We also take this opportunity to test the ability
156 # of an ORDER BY clause to bind to either SELECT of a UNION.
157 # The left-most SELECT is preferred. In standard SQL, only
158 # the left SELECT can be used. The ability to match an ORDER
159 # BY term to the right SELECT is an SQLite extension.
160 #
161 ifcapable compound {
162 do_test null-6.1 {
163 execsql {
164 select b from t1 union select c from t1 order by b;
165 }
166 } {{} 0 1}
167 do_test null-6.2 {
168 execsql {
169 select b from t1 union select c from t1 order by 1;
170 }
171 } {{} 0 1}
172 do_test null-6.3 {
173 execsql {
174 select b from t1 union select c from t1 order by t1.b;
175 }
176 } {{} 0 1}
177 do_test null-6.4 {
178 execsql {
179 select b from t1 union select c from t1 order by main.t1.b;
180 }
181 } {{} 0 1}
182 do_test null-6.5 {
183 catchsql {
184 select b from t1 union select c from t1 order by t1.a;
185 }
186 } {1 {1st ORDER BY term does not match any column in the result set}}
187 do_test null-6.6 {
188 catchsql {
189 select b from t1 union select c from t1 order by main.t1.a;
190 }
191 } {1 {1st ORDER BY term does not match any column in the result set}}
192 } ;# ifcapable compound
193  
194 # The UNIQUE constraint only applies to non-null values
195 #
196 ifcapable conflict {
197 do_test null-7.1 {
198 execsql {
199 create table t2(a, b unique on conflict ignore);
200 insert into t2 values(1,1);
201 insert into t2 values(2,null);
202 insert into t2 values(3,null);
203 insert into t2 values(4,1);
204 select a from t2;
205 }
206 } {1 2 3}
207 do_test null-7.2 {
208 execsql {
209 create table t3(a, b, c, unique(b,c) on conflict ignore);
210 insert into t3 values(1,1,1);
211 insert into t3 values(2,null,1);
212 insert into t3 values(3,null,1);
213 insert into t3 values(4,1,1);
214 select a from t3;
215 }
216 } {1 2 3}
217 }
218  
219 # Ticket #461 - Make sure nulls are handled correctly when doing a
220 # lookup using an index.
221 #
222 do_test null-8.1 {
223 execsql {
224 CREATE TABLE t4(x,y);
225 INSERT INTO t4 VALUES(1,11);
226 INSERT INTO t4 VALUES(2,NULL);
227 SELECT x FROM t4 WHERE y=NULL;
228 }
229 } {}
230 ifcapable subquery {
231 do_test null-8.2 {
232 execsql {
233 SELECT x FROM t4 WHERE y IN (33,NULL);
234 }
235 } {}
236 }
237 do_test null-8.3 {
238 execsql {
239 SELECT x FROM t4 WHERE y<33 ORDER BY x;
240 }
241 } {1}
242 do_test null-8.4 {
243 execsql {
244 SELECT x FROM t4 WHERE y>6 ORDER BY x;
245 }
246 } {1}
247 do_test null-8.5 {
248 execsql {
249 SELECT x FROM t4 WHERE y!=33 ORDER BY x;
250 }
251 } {1}
252 do_test null-8.11 {
253 execsql {
254 CREATE INDEX t4i1 ON t4(y);
255 SELECT x FROM t4 WHERE y=NULL;
256 }
257 } {}
258 ifcapable subquery {
259 do_test null-8.12 {
260 execsql {
261 SELECT x FROM t4 WHERE y IN (33,NULL);
262 }
263 } {}
264 }
265 do_test null-8.13 {
266 execsql {
267 SELECT x FROM t4 WHERE y<33 ORDER BY x;
268 }
269 } {1}
270 do_test null-8.14 {
271 execsql {
272 SELECT x FROM t4 WHERE y>6 ORDER BY x;
273 }
274 } {1}
275 do_test null-8.15 {
276 execsql {
277 SELECT x FROM t4 WHERE y!=33 ORDER BY x;
278 }
279 } {1}
280  
281  
282  
283 finish_test