# 2008 July 11 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. # # This file experiments with recursion using the "test_eval()" SQL function # in order to make sure that SQLite is reentrant. # # $Id: eval.test,v 1.1 2008/07/11 21:02:54 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Create a table to work with. # do_test eval-1.1 { execsql { CREATE TABLE t1(x INTEGER PRIMARY KEY); INSERT INTO t1 VALUES(1); INSERT INTO t1 VALUES(2); INSERT INTO t1 SELECT x+2 FROM t1; INSERT INTO t1 SELECT x+4 FROM t1; INSERT INTO t1 SELECT x+8 FROM t1; INSERT INTO t1 SELECT x+16 FROM t1; INSERT INTO t1 SELECT x+32 FROM t1; INSERT INTO t1 SELECT x+64 FROM t1; INSERT INTO t1 SELECT x+128 FROM t1; INSERT INTO t1 SELECT x+256 FROM t1; SELECT count(*), max(x) FROM t1; } } {512 512} do_test eval-1.2 { execsql { SELECT x, test_eval('SELECT max(x) FROM t1 WHERE x<' || x) FROM t1 LIMIT 5 } } {1 {} 2 1 3 2 4 3 5 4} # Delete a row out from under a read cursor in the middle of # collecting the arguments for a single row in a result set. # Verify that subsequent rows come out as NULL. # do_test eval-2.1 { execsql { CREATE TABLE t2(x,y); INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; SELECT x, test_eval('DELETE FROM t2 WHERE x='||x), y FROM t2; } } {1 {} {} 2 {} {} 3 {} {} 4 {} {}} do_test eval-2.2 { execsql { SELECT * FROM t2 } } {} # Modify a row while it is being read. # do_test eval-3.1 { execsql { INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; SELECT x, test_eval('UPDATE t2 SET y=y+100 WHERE x='||x), y FROM t2; } } {1 {} 102 2 {} 103 3 {} 104 4 {} 105} finish_test