MySQL  8.0.27
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 
32 class Query_tables_list;
33 class THD;
34 class Trigger;
35 struct MEM_ROOT;
36 struct MY_BITMAP;
37 struct TABLE;
38 struct TABLE_LIST;
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_LIST *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_lex.h:2460
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:821
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
void add_tables_and_routines(THD *thd, Query_tables_list *prelocking_ctx, TABLE_LIST *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
List< Trigger > & get_trigger_list()
Definition: trigger_chain.h:49
List< Trigger > m_triggers
List of triggers of this chain.
Definition: trigger_chain.h:68
Trigger_chain()=default
bool execute_triggers(THD *thd)
Run every trigger in the list of triggers.
Definition: trigger_chain.cc:139
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:73
static MEM_ROOT mem_root
Definition: client_plugin.cc:109
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:78
Definition: mysql_lex_string.h:39
Definition: my_bitmap.h:41
Definition: table.h:2694
Definition: table.h:1394
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