MySQL  8.0.17
Source Code Documentation
dd_trigger.h
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23 #ifndef DD_TRIGGER_INCLUDED
24 #define DD_TRIGGER_INCLUDED
25 
26 #include "lex_string.h"
27 #include "sql/trigger_def.h" // enum_trigger_order_type
28 
29 struct MEM_ROOT;
30 class THD;
31 class Trigger;
32 
33 template <class T>
34 class List;
35 
36 namespace dd {
37 class Table;
38 
39 /**
40  Create new trigger in the data dictionary.
41 
42  @param [in] thd thread handle
43  @param [in] new_trigger Trigger object from sql-layer that describes
44  a trigger to add in the Data Dictionary
45  @param [in] ordering_clause Ordering property for trigger being created
46  @param [in] referenced_trigger_name Information about trigger referenced by
47  ordering_clause if any.
48 
49 
50  @return Operation status
51  @retval true Failure
52  @retval false Success
53 */
54 
55 bool create_trigger(THD *thd, const ::Trigger *new_trigger,
56  enum_trigger_order_type ordering_clause,
57  const LEX_CSTRING &referenced_trigger_name);
58 
59 /**
60  Load table triggers from the data dictionary.
61 
62  @param [in] thd thread handle
63  @param [in] mem_root MEM_ROOT for memory allocation
64  @param [in] schema_name name of schema
65  @param [in] table_name subject table name
66  @param [in] table table object
67  @param [out] triggers pointer to the list where new Trigger
68  objects will be inserted
69 
70  @return Operation status
71  @retval true Failure
72  @retval false Success
73 */
74 
75 bool load_triggers(THD *thd, MEM_ROOT *mem_root, const char *schema_name,
76  const char *table_name, const dd::Table &table,
77  List<::Trigger> *triggers);
78 
79 /**
80  Check in the data dictionary if there is any trigger associated with a table.
81 
82  @param [in] thd thread handle
83  @param [in] schema_name name of schema
84  @param [in] table_name subject table name
85  @param [out] table_has_trigger true in case there is trigger(s) for a table,
86  else false
87 
88  @return Operation status
89  @retval true Failure
90  @retval false Success
91 
92 */
93 
94 bool table_has_triggers(THD *thd, const char *schema_name,
95  const char *table_name, bool *table_has_trigger);
96 
97 } // namespace dd
98 
99 #endif /* DD_TRIGGER_INCLUDED */
This file defines all base public constants related to triggers in MySQL.
Definition: mysql_lex_string.h:39
Definition: aggregate_check.h:523
bool load_triggers(THD *thd, MEM_ROOT *mem_root, const char *schema_name, const char *table_name, const dd::Table &table, List<::Trigger > *triggers)
Load table triggers from the data dictionary.
Definition: dd_trigger.cc:280
static MEM_ROOT mem_root
Definition: client_plugin.cc:107
bool create_trigger(THD *thd, const ::Trigger *new_trigger, enum_trigger_order_type ordering_clause, const LEX_CSTRING &referenced_trigger_name)
Create new trigger in the data dictionary.
Definition: dd_trigger.cc:177
enum_trigger_order_type
Possible trigger ordering clause values:
Definition: trigger_def.h:63
Definition: test_sql_stmt.cc:150
The version of the current data dictionary table definitions.
Definition: dictionary_client.h:39
bool table_has_triggers(THD *thd, const char *schema_name, const char *table_name, bool *table_has_trigger)
Check in the data dictionary if there is any trigger associated with a table.
Definition: dd_trigger.cc:356
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:77
This class represents a trigger object.
Definition: trigger.h:73
Definition: table.h:43
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:777
const char * table_name
Definition: rules_table_service.cc:55