gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/eval.test (about)

     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  do_test eval-2.3 {
    62    execsql {
    63      INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5;
    64      SELECT x, test_eval('DELETE FROM t2 WHERE x='||x), y FROM t2
    65       ORDER BY rowid DESC;
    66    }
    67  } {4 {} {} 3 {} {} 2 {} {} 1 {} {}}
    68  do_test eval-2.4 {
    69    execsql {
    70      SELECT * FROM t2
    71    }
    72  } {}
    73  
    74  # Modify a row while it is being read.
    75  #
    76  do_test eval-3.1 {
    77    execsql {
    78      INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5;
    79      SELECT x, test_eval('UPDATE t2 SET y=y+100 WHERE x='||x), y FROM t2;
    80    }
    81  } {1 {} 102 2 {} 103 3 {} 104 4 {} 105}
    82  
    83  do_test eval-4.1 {
    84    execsql { SELECT test_eval('SELECT ''abcdefghij''') }
    85  } {abcdefghij}
    86  
    87  finish_test