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Annotation of embedaddon/sqlite3/test/eval.test, revision 1.1.1.1

1.1       misho       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