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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  |  | 
|  62 # Modify a row while it is being read. |  | 
|  63 # |  | 
|  64 do_test eval-3.1 { |  | 
|  65   execsql { |  | 
|  66     INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; |  | 
|  67     SELECT x, test_eval('UPDATE t2 SET y=y+100 WHERE x='||x), y FROM t2; |  | 
|  68   } |  | 
|  69 } {1 {} 102 2 {} 103 3 {} 104 4 {} 105} |  | 
|  70  |  | 
|  71 do_test eval-4.1 { |  | 
|  72   execsql { SELECT test_eval('SELECT "abcdefghij"') } |  | 
|  73 } {abcdefghij} |  | 
|  74  |  | 
|  75 finish_test |  | 
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