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1 # 2008 July 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. | |
12 # | |
13 # This file experiments with recursion using the "test_eval()" SQL function | |
14 # in order to make sure that SQLite is reentrant. | |
15 # | |
16 # $Id: eval.test,v 1.2 2008/10/13 10:37:50 danielk1977 Exp $ | |
17 | |
18 set testdir [file dirname $argv0] | |
19 source $testdir/tester.tcl | |
20 | |
21 # Create a table to work with. | |
22 # | |
23 do_test eval-1.1 { | |
24 execsql { | |
25 CREATE TABLE t1(x INTEGER PRIMARY KEY); | |
26 INSERT INTO t1 VALUES(1); | |
27 INSERT INTO t1 VALUES(2); | |
28 INSERT INTO t1 SELECT x+2 FROM t1; | |
29 INSERT INTO t1 SELECT x+4 FROM t1; | |
30 INSERT INTO t1 SELECT x+8 FROM t1; | |
31 INSERT INTO t1 SELECT x+16 FROM t1; | |
32 INSERT INTO t1 SELECT x+32 FROM t1; | |
33 INSERT INTO t1 SELECT x+64 FROM t1; | |
34 INSERT INTO t1 SELECT x+128 FROM t1; | |
35 INSERT INTO t1 SELECT x+256 FROM t1; | |
36 SELECT count(*), max(x) FROM t1; | |
37 } | |
38 } {512 512} | |
39 do_test eval-1.2 { | |
40 execsql { | |
41 SELECT x, test_eval('SELECT max(x) FROM t1 WHERE x<' || x) FROM t1 LIMIT 5 | |
42 } | |
43 } {1 {} 2 1 3 2 4 3 5 4} | |
44 | |
45 # Delete a row out from under a read cursor in the middle of | |
46 # collecting the arguments for a single row in a result set. | |
47 # Verify that subsequent rows come out as NULL. | |
48 # | |
49 do_test eval-2.1 { | |
50 execsql { | |
51 CREATE TABLE t2(x,y); | |
52 INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; | |
53 SELECT x, test_eval('DELETE FROM t2 WHERE x='||x), y FROM t2; | |
54 } | |
55 } {1 {} {} 2 {} {} 3 {} {} 4 {} {}} | |
56 do_test eval-2.2 { | |
57 execsql { | |
58 SELECT * FROM t2 | |
59 } | |
60 } {} | |
61 do_test eval-2.3 { | |
62 execsql { | |
63 INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; | |
64 SELECT x, test_eval('DELETE FROM t2 WHERE x='||x), y FROM t2 | |
65 ORDER BY rowid DESC; | |
66 } | |
67 } {4 {} {} 3 {} {} 2 {} {} 1 {} {}} | |
68 do_test eval-2.4 { | |
69 execsql { | |
70 SELECT * FROM t2 | |
71 } | |
72 } {} | |
73 | |
74 # Modify a row while it is being read. | |
75 # | |
76 do_test eval-3.1 { | |
77 execsql { | |
78 INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; | |
79 SELECT x, test_eval('UPDATE t2 SET y=y+100 WHERE x='||x), y FROM t2; | |
80 } | |
81 } {1 {} 102 2 {} 103 3 {} 104 4 {} 105} | |
82 | |
83 do_test eval-4.1 { | |
84 execsql { SELECT test_eval('SELECT "abcdefghij"') } | |
85 } {abcdefghij} | |
86 | |
87 finish_test | |
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