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 TABLE_TRIGGER_FIELD_SUPPORT_H_INCLUDED
25 #define TABLE_TRIGGER_FIELD_SUPPORT_H_INCLUDED
26 
27 ///////////////////////////////////////////////////////////////////////////
28 
29 #include "trigger_def.h"  // enum_trigger_variable_type
30 
31 ///////////////////////////////////////////////////////////////////////////
32 
33 struct TABLE;
34 class Field;
35 
36 ///////////////////////////////////////////////////////////////////////////
37 
38 /**
39   This is an interface to be used from Item_trigger_field to access information
40   about table trigger fields (NEW/OLD rows).
41 */
42 
43 class Table_trigger_field_support
44 {
45 public:
46   virtual TABLE *get_subject_table()= 0;
47 
48   virtual Field *get_trigger_variable_field(enum_trigger_variable_type v,
49                                             int field_index)= 0;
50 
~Table_trigger_field_support()51   virtual ~Table_trigger_field_support()
52   { }
53 };
54 
55 ///////////////////////////////////////////////////////////////////////////
56 
57 #endif // TABLE_TRIGGER_FIELD_SUPPORT_H_INCLUDED
58