1 /*
2    Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 
4    This program is free software; you can redistribute it and/or modify
5    it under the terms of the GNU General Public License, version 2.0,
6    as published by the Free Software Foundation.
7 
8    This program is also distributed with certain software (including
9    but not limited to OpenSSL) that is licensed under separate terms,
10    as designated in a particular file or component or in included license
11    documentation.  The authors of MySQL hereby grant you an additional
12    permission to link the program and your derivative works with the
13    separately licensed software that they have included with MySQL.
14 
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License, version 2.0, for more details.
19 
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software Foundation,
22    51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
23 
24 #ifndef TRIGGER_DEF_H_INCLUDED
25 #define TRIGGER_DEF_H_INCLUDED
26 
27 ///////////////////////////////////////////////////////////////////////////
28 
29 /**
30   @file
31 
32   @brief
33   This file defines all base public constants related to triggers in MySQL.
34 */
35 
36 ///////////////////////////////////////////////////////////////////////////
37 
38 /**
39   Constants to enumerate possible event types on which triggers can be fired.
40 */
41 enum enum_trigger_event_type
42 {
43   TRG_EVENT_INSERT= 0,
44   TRG_EVENT_UPDATE= 1,
45   TRG_EVENT_DELETE= 2,
46   TRG_EVENT_MAX
47 };
48 
49 /**
50   Constants to enumerate possible timings when triggers can be fired.
51 */
52 enum enum_trigger_action_time_type
53 {
54   TRG_ACTION_BEFORE= 0,
55   TRG_ACTION_AFTER= 1,
56   TRG_ACTION_MAX
57 };
58 
59 /**
60   Possible trigger ordering clause values:
61     - TRG_ORDER_NONE     -- trigger ordering clause is not specified
62     - TRG_ORDER_FOLLOWS  -- FOLLOWS clause
63     - TRG_ORDER_PRECEDES -- PRECEDES clause
64 */
65 enum enum_trigger_order_type
66 {
67   TRG_ORDER_NONE= 0,
68   TRG_ORDER_FOLLOWS= 1,
69   TRG_ORDER_PRECEDES= 2
70 };
71 
72 /**
73   Enum constants to designate NEW and OLD trigger pseudo-variables.
74 */
75 enum enum_trigger_variable_type
76 {
77   TRG_OLD_ROW,
78   TRG_NEW_ROW
79 };
80 
81 ///////////////////////////////////////////////////////////////////////////
82 
83 /*
84   The following constants are defined in trigger_loader.cc.
85   They would be private to Trigger_loader if we didn't have handler.
86 */
87 
88 extern const char * const TRG_EXT;
89 extern const char * const TRN_EXT;
90 
91 ///////////////////////////////////////////////////////////////////////////
92 
93 #endif // TRIGGER_DEF_H_INCLUDED
94