MySQL 9.0.0
Source Code Documentation
trigger_chain.h
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25
26#ifndef TRIGGER_CHAIN_H_INCLUDED
27#define TRIGGER_CHAIN_H_INCLUDED
28
29#include "lex_string.h"
30#include "sql/sql_list.h" // List
31#include "sql/trigger_def.h" // enum_trigger_order_type
32
34class THD;
35class Trigger;
36struct MEM_ROOT;
37struct MY_BITMAP;
38struct TABLE;
39class Table_ref;
40
42 public:
43 Trigger_chain() = default;
44
46 /**
47 @return a reference to the list of triggers with the same
48 EVENT/ACTION_TIME assigned to the table.
49 */
51
52 bool add_trigger(MEM_ROOT *mem_root, Trigger *new_trigger,
53 enum_trigger_order_type ordering_clause,
54 const LEX_CSTRING &referenced_trigger_name);
55
56 bool add_trigger(MEM_ROOT *mem_root, Trigger *new_trigger);
57
58 bool execute_triggers(THD *thd);
59
60 void add_tables_and_routines(THD *thd, Query_tables_list *prelocking_ctx,
61 Table_ref *table_list);
62
63 void mark_fields(TABLE *subject_table);
64
65 bool has_updated_trigger_fields(const MY_BITMAP *used_fields);
66
67 private:
68 /// List of triggers of this chain.
70};
71
72#endif
Definition: sql_list.h:467
Definition: sql_lex.h:2613
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
Definition: table.h:2871
Definition: trigger_chain.h:41
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:61
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:195
List< Trigger > m_triggers
List of triggers of this chain.
Definition: trigger_chain.h:69
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:160
bool execute_triggers(THD *thd)
Run every trigger in the list of triggers.
Definition: trigger_chain.cc:140
List< Trigger > & get_trigger_list()
Definition: trigger_chain.h:50
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:177
~Trigger_chain()
Definition: trigger_chain.cc:41
This class represents a trigger object.
Definition: trigger.h:75
static MEM_ROOT mem_root
Definition: client_plugin.cc:114
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:83
Definition: mysql_lex_string.h:40
Definition: my_bitmap.h:43
Definition: table.h:1407
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:64