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sqlite3

    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 1.1.1.1 2012/02/21 17:04:16 misho 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