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 76
