github.com/jdgcs/sqlite3@v1.12.1-0.20210908114423-bc5f96e4dd51/testdata/tcl/triggerE.test (about)

     1  # 2009 December 29
     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  #
    12  # This file tests the effects of SQL variable references embedded in
    13  # triggers. If the user attempts to create such a trigger, it is an
    14  # error. However, if an existing trigger definition is read from
    15  # the sqlite_master table, the variable reference always evaluates
    16  # to NULL.
    17  #
    18  
    19  set testdir [file dirname $argv0]
    20  source $testdir/tester.tcl
    21  ifcapable {!trigger} {
    22    finish_test
    23    return
    24  }
    25  set testprefix triggerE
    26  
    27  do_execsql_test 1.0 {
    28    CREATE TABLE t1(a, b);
    29    CREATE TABLE t2(c, d);
    30    CREATE TABLE t3(e, f);
    31  }
    32  
    33  # forcedelete test.db2
    34  # do_execsql_test 1.1 {
    35  #   ATTACH 'test.db2' AS aux;
    36  #   CREATE TABLE aux.t4(x);
    37  #   INSERT INTO aux.t4 VALUES(5);
    38  # 
    39  #   CREATE TRIGGER tr1 AFTER INSERT ON t1 WHEN new.a IN (SELECT x FROM aux.t4)
    40  #   BEGIN
    41  #     SELECT 1;
    42  #   END;
    43  # } 
    44  # do_execsql_test 1.2 { INSERT INTO t1 VALUES(1,1); }
    45  # do_execsql_test 1.3 { INSERT INTO t1 VALUES(5,5); }
    46  
    47  #-------------------------------------------------------------------------
    48  # Attempt to create various triggers that use bound variables.
    49  #
    50  set errmsg "trigger cannot use variables"
    51  foreach {tn defn} {
    52    1 { AFTER INSERT ON t1 WHEN new.a = ? BEGIN SELECT 1; END; }
    53    2 { BEFORE DELETE ON t1 BEGIN SELECT ?; END; }
    54    3 { BEFORE DELETE ON t1 BEGIN SELECT * FROM (SELECT * FROM (SELECT ?)); END; }
    55    5 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 GROUP BY ?; END; }
    56    6 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 LIMIT ?; END; }
    57    7 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 ORDER BY ?; END; }
    58    8 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = ?; END; }
    59    9 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = 1 WHERE d = ?; END; }
    60   10 { AFTER INSERT ON t1 BEGIN SELECT * FROM pragma_stats(?); END; }
    61   11 { BEFORE INSERT ON t1 BEGIN 
    62        INSERT INTO t1 SELECT max(b) OVER(ORDER BY $1) FROM t1; END }
    63  } {
    64    catchsql {drop trigger tr1}
    65    do_catchsql_test 1.1.$tn "CREATE TRIGGER tr1 $defn" [list 1 $errmsg]
    66    do_catchsql_test 1.2.$tn "CREATE TEMP TRIGGER tr1 $defn" [list 1 $errmsg]
    67  }
    68  
    69  #-------------------------------------------------------------------------
    70  # Test that variable references within trigger definitions loaded from 
    71  # the sqlite_master table are automatically converted to NULL.
    72  #
    73  sqlite3_db_config db DEFENSIVE 0
    74  do_execsql_test 2.1 {
    75    PRAGMA writable_schema = 1;
    76    INSERT INTO sqlite_master VALUES('trigger', 'tr1', 't1', 0,
    77      'CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN 
    78          INSERT INTO t2 VALUES(?1, ?2); 
    79       END'
    80    );
    81  
    82    INSERT INTO sqlite_master VALUES('trigger', 'tr2', 't3', 0,
    83      'CREATE TRIGGER tr2 AFTER INSERT ON t3 WHEN ?1 IS NULL BEGIN
    84          UPDATE t2 SET c=d WHERE c IS ?2;
    85       END'
    86    );
    87  }
    88  db close
    89  sqlite3 db test.db
    90  
    91  do_execsql_test 2.2.1 {
    92    INSERT INTO t1 VALUES(1, 2);
    93    SELECT * FROM t2;
    94  } {{} {}}
    95  do_test 2.2.2 {
    96    set one 3
    97    execsql {
    98      DELETE FROM t2;
    99      INSERT INTO t1 VALUES($one, ?1);
   100      SELECT * FROM t2;
   101    }
   102  } {{} {}}
   103  do_execsql_test 2.2.3 { SELECT * FROM t1 } {1 2 3 3}
   104  
   105  do_execsql_test 2.3 {
   106    DELETE FROM t2;
   107    INSERT INTO t2 VALUES('x', 'y');
   108    INSERT INTO t2 VALUES(NULL, 'z');
   109    INSERT INTO t3 VALUES(1, 2);
   110    SELECT * FROM t3;
   111    SELECT * FROM t2;
   112  } {1 2 x y z z}
   113  
   114  finish_test