MySQL 8.3.0
Source Code Documentation
trigger_chain.h
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24
25#ifndef TRIGGER_CHAIN_H_INCLUDED
26#define TRIGGER_CHAIN_H_INCLUDED
27
28#include "lex_string.h"
29#include "sql/sql_list.h" // List
30#include "sql/trigger_def.h" // enum_trigger_order_type
31
33class THD;
34class Trigger;
35struct MEM_ROOT;
36struct MY_BITMAP;
37struct TABLE;
38class Table_ref;
39
41 public:
42 Trigger_chain() = default;
43
45 /**
46 @return a reference to the list of triggers with the same
47 EVENT/ACTION_TIME assigned to the table.
48 */
50
51 bool add_trigger(MEM_ROOT *mem_root, Trigger *new_trigger,
52 enum_trigger_order_type ordering_clause,
53 const LEX_CSTRING &referenced_trigger_name);
54
55 bool add_trigger(MEM_ROOT *mem_root, Trigger *new_trigger);
56
57 bool execute_triggers(THD *thd);
58
59 void add_tables_and_routines(THD *thd, Query_tables_list *prelocking_ctx,
60 Table_ref *table_list);
61
62 void mark_fields(TABLE *subject_table);
63
64 bool has_updated_trigger_fields(const MY_BITMAP *used_fields);
65
66 private:
67 /// List of triggers of this chain.
69};
70
71#endif
Definition: sql_list.h:434
Definition: sql_lex.h:2565
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:35
Definition: table.h:2853
Definition: trigger_chain.h:40
bool add_trigger(MEM_ROOT *mem_root, Trigger *new_trigger, enum_trigger_order_type ordering_clause, const LEX_CSTRING &referenced_trigger_name)
Add a new trigger into the list of triggers with the same ACTION/TIMING value combination.
Definition: trigger_chain.cc:60
bool has_updated_trigger_fields(const MY_BITMAP *used_fields)
Iterate over the list of triggers and check whether some table's fields are used in any trigger.
Definition: trigger_chain.cc:194
List< Trigger > m_triggers
List of triggers of this chain.
Definition: trigger_chain.h:68
Trigger_chain()=default
void add_tables_and_routines(THD *thd, Query_tables_list *prelocking_ctx, Table_ref *table_list)
Iterate over the list of triggers and add tables and routines used by trigger to the set of elements ...
Definition: trigger_chain.cc:159
bool execute_triggers(THD *thd)
Run every trigger in the list of triggers.
Definition: trigger_chain.cc:139
List< Trigger > & get_trigger_list()
Definition: trigger_chain.h:49
void mark_fields(TABLE *subject_table)
Iterate over the list of triggers and mark fields of subject table which we read/set in every trigger...
Definition: trigger_chain.cc:176
~Trigger_chain()
Definition: trigger_chain.cc:40
This class represents a trigger object.
Definition: trigger.h:74
static MEM_ROOT mem_root
Definition: client_plugin.cc:113
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:82
Definition: mysql_lex_string.h:39
Definition: my_bitmap.h:42
Definition: table.h:1403
This file defines all base public constants related to triggers in MySQL.
enum_trigger_order_type
Possible trigger ordering clause values:
Definition: trigger_def.h:63