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Green_GoodERP18_FSJ_Standard/PostgreSQL/include/server/commands/trigger.h

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  1. /*-------------------------------------------------------------------------

  2.  *

  3.  * trigger.h

  4.  *	  Declarations for trigger handling.

  5.  *

  6.  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group

  7.  * Portions Copyright (c) 1994, Regents of the University of California

  8.  *

  9.  * src/include/commands/trigger.h

  10.  *

  11.  *-------------------------------------------------------------------------

  12.  */

  13. #ifndef TRIGGER_H

  14. #define TRIGGER_H

  15. 

  16. #include "catalog/objectaddress.h"

  17. #include "nodes/execnodes.h"

  18. #include "nodes/parsenodes.h"

  19. 

  20. /*

  21.  * TriggerData is the node type that is passed as fmgr "context" info

  22.  * when a function is called by the trigger manager.

  23.  */

  24. 

  25. #define CALLED_AS_TRIGGER(fcinfo) \

  26. 	((fcinfo)->context != NULL && IsA((fcinfo)->context, TriggerData))

  27. 

  28. typedef uint32 TriggerEvent;

  29. 

  30. typedef struct TriggerData

  31. {

  32. 	NodeTag		type;

  33. 	TriggerEvent tg_event;

  34. 	Relation	tg_relation;

  35. 	HeapTuple	tg_trigtuple;

  36. 	HeapTuple	tg_newtuple;

  37. 	Trigger    *tg_trigger;

  38. 	TupleTableSlot *tg_trigslot;

  39. 	TupleTableSlot *tg_newslot;

  40. 	Tuplestorestate *tg_oldtable;

  41. 	Tuplestorestate *tg_newtable;

  42. } TriggerData;

  43. 

  44. /*

  45.  * The state for capturing old and new tuples into transition tables for a

  46.  * single ModifyTable node (or other operation source, e.g. copy.c).

  47.  *

  48.  * This is per-caller to avoid conflicts in setting tcs_map or

  49.  * tcs_original_insert_tuple.  Note, however, that the pointed-to

  50.  * private data may be shared across multiple callers.

  51.  */

  52. struct AfterTriggersTableData;	/* private in trigger.c */

  53. 

  54. typedef struct TransitionCaptureState

  55. {

  56. 	/*

  57. 	 * Is there at least one trigger specifying each transition relation on

  58. 	 * the relation explicitly named in the DML statement or COPY command?

  59. 	 * Note: in current usage, these flags could be part of the private state,

  60. 	 * but it seems possibly useful to let callers see them.

  61. 	 */

  62. 	bool		tcs_delete_old_table;

  63. 	bool		tcs_update_old_table;

  64. 	bool		tcs_update_new_table;

  65. 	bool		tcs_insert_new_table;

  66. 

  67. 	/*

  68. 	 * For UPDATE and DELETE, AfterTriggerSaveEvent may need to convert the

  69. 	 * new and old tuples from a child table's format to the format of the

  70. 	 * relation named in a query so that it is compatible with the transition

  71. 	 * tuplestores.  The caller must store the conversion map here if so.

  72. 	 */

  73. 	TupleConversionMap *tcs_map;

  74. 

  75. 	/*

  76. 	 * For INSERT and COPY, it would be wasteful to convert tuples from child

  77. 	 * format to parent format after they have already been converted in the

  78. 	 * opposite direction during routing.  In that case we bypass conversion

  79. 	 * and allow the inserting code (copy.c and nodeModifyTable.c) to provide

  80. 	 * a slot containing the original tuple directly.

  81. 	 */

  82. 	TupleTableSlot *tcs_original_insert_tuple;

  83. 

  84. 	/*

  85. 	 * Private data including the tuplestore(s) into which to insert tuples.

  86. 	 */

  87. 	struct AfterTriggersTableData *tcs_private;

  88. } TransitionCaptureState;

  89. 

  90. /*

  91.  * TriggerEvent bit flags

  92.  *

  93.  * Note that we assume different event types (INSERT/DELETE/UPDATE/TRUNCATE)

  94.  * can't be OR'd together in a single TriggerEvent.  This is unlike the

  95.  * situation for pg_trigger rows, so pg_trigger.tgtype uses a different

  96.  * representation!

  97.  */

  98. #define TRIGGER_EVENT_INSERT			0x00000000

  99. #define TRIGGER_EVENT_DELETE			0x00000001

  100. #define TRIGGER_EVENT_UPDATE			0x00000002

  101. #define TRIGGER_EVENT_TRUNCATE			0x00000003

  102. #define TRIGGER_EVENT_OPMASK			0x00000003

  103. 

  104. #define TRIGGER_EVENT_ROW				0x00000004

  105. 

  106. #define TRIGGER_EVENT_BEFORE			0x00000008

  107. #define TRIGGER_EVENT_AFTER				0x00000000

  108. #define TRIGGER_EVENT_INSTEAD			0x00000010

  109. #define TRIGGER_EVENT_TIMINGMASK		0x00000018

  110. 

  111. /* More TriggerEvent flags, used only within trigger.c */

  112. 

  113. #define AFTER_TRIGGER_DEFERRABLE		0x00000020

  114. #define AFTER_TRIGGER_INITDEFERRED		0x00000040

  115. 

  116. #define TRIGGER_FIRED_BY_INSERT(event) \

  117. 	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_INSERT)

  118. 

  119. #define TRIGGER_FIRED_BY_DELETE(event) \

  120. 	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_DELETE)

  121. 

  122. #define TRIGGER_FIRED_BY_UPDATE(event) \

  123. 	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_UPDATE)

  124. 

  125. #define TRIGGER_FIRED_BY_TRUNCATE(event) \

  126. 	(((event) & TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_TRUNCATE)

  127. 

  128. #define TRIGGER_FIRED_FOR_ROW(event) \

  129. 	((event) & TRIGGER_EVENT_ROW)

  130. 

  131. #define TRIGGER_FIRED_FOR_STATEMENT(event) \

  132. 	(!TRIGGER_FIRED_FOR_ROW(event))

  133. 

  134. #define TRIGGER_FIRED_BEFORE(event) \

  135. 	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_BEFORE)

  136. 

  137. #define TRIGGER_FIRED_AFTER(event) \

  138. 	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_AFTER)

  139. 

  140. #define TRIGGER_FIRED_INSTEAD(event) \

  141. 	(((event) & TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_INSTEAD)

  142. 

  143. /*

  144.  * Definitions for replication role based firing.

  145.  */

  146. #define SESSION_REPLICATION_ROLE_ORIGIN		0

  147. #define SESSION_REPLICATION_ROLE_REPLICA	1

  148. #define SESSION_REPLICATION_ROLE_LOCAL		2

  149. extern PGDLLIMPORT int SessionReplicationRole;

  150. 

  151. /*

  152.  * States at which a trigger can be fired. These are the

  153.  * possible values for pg_trigger.tgenabled.

  154.  */

  155. #define TRIGGER_FIRES_ON_ORIGIN				'O'

  156. #define TRIGGER_FIRES_ALWAYS				'A'

  157. #define TRIGGER_FIRES_ON_REPLICA			'R'

  158. #define TRIGGER_DISABLED					'D'

  159. 

  160. extern ObjectAddress CreateTrigger(CreateTrigStmt *stmt, const char *queryString,

  161. 								   Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid,

  162. 								   Oid funcoid, Oid parentTriggerOid, Node *whenClause,

  163. 								   bool isInternal, bool in_partition);

  164. 

  165. extern void RemoveTriggerById(Oid trigOid);

  166. extern Oid	get_trigger_oid(Oid relid, const char *name, bool missing_ok);

  167. 

  168. extern ObjectAddress renametrig(RenameStmt *stmt);

  169. 

  170. extern void EnableDisableTrigger(Relation rel, const char *tgname,

  171. 								 char fires_when, bool skip_system, LOCKMODE lockmode);

  172. 

  173. extern void RelationBuildTriggers(Relation relation);

  174. 

  175. extern TriggerDesc *CopyTriggerDesc(TriggerDesc *trigdesc);

  176. 

  177. extern const char *FindTriggerIncompatibleWithInheritance(TriggerDesc *trigdesc);

  178. 

  179. extern TransitionCaptureState *MakeTransitionCaptureState(TriggerDesc *trigdesc,

  180. 														  Oid relid, CmdType cmdType);

  181. 

  182. extern void FreeTriggerDesc(TriggerDesc *trigdesc);

  183. 

  184. extern void ExecBSInsertTriggers(EState *estate,

  185. 								 ResultRelInfo *relinfo);

  186. extern void ExecASInsertTriggers(EState *estate,

  187. 								 ResultRelInfo *relinfo,

  188. 								 TransitionCaptureState *transition_capture);

  189. extern bool ExecBRInsertTriggers(EState *estate,

  190. 								 ResultRelInfo *relinfo,

  191. 								 TupleTableSlot *slot);

  192. extern void ExecARInsertTriggers(EState *estate,

  193. 								 ResultRelInfo *relinfo,

  194. 								 TupleTableSlot *slot,

  195. 								 List *recheckIndexes,

  196. 								 TransitionCaptureState *transition_capture);

  197. extern bool ExecIRInsertTriggers(EState *estate,

  198. 								 ResultRelInfo *relinfo,

  199. 								 TupleTableSlot *slot);

  200. extern void ExecBSDeleteTriggers(EState *estate,

  201. 								 ResultRelInfo *relinfo);

  202. extern void ExecASDeleteTriggers(EState *estate,

  203. 								 ResultRelInfo *relinfo,

  204. 								 TransitionCaptureState *transition_capture);

  205. extern bool ExecBRDeleteTriggers(EState *estate,

  206. 								 EPQState *epqstate,

  207. 								 ResultRelInfo *relinfo,

  208. 								 ItemPointer tupleid,

  209. 								 HeapTuple fdw_trigtuple,

  210. 								 TupleTableSlot **epqslot);

  211. extern void ExecARDeleteTriggers(EState *estate,

  212. 								 ResultRelInfo *relinfo,

  213. 								 ItemPointer tupleid,

  214. 								 HeapTuple fdw_trigtuple,

  215. 								 TransitionCaptureState *transition_capture);

  216. extern bool ExecIRDeleteTriggers(EState *estate,

  217. 								 ResultRelInfo *relinfo,

  218. 								 HeapTuple trigtuple);

  219. extern void ExecBSUpdateTriggers(EState *estate,

  220. 								 ResultRelInfo *relinfo);

  221. extern void ExecASUpdateTriggers(EState *estate,

  222. 								 ResultRelInfo *relinfo,

  223. 								 TransitionCaptureState *transition_capture);

  224. extern bool ExecBRUpdateTriggers(EState *estate,

  225. 								 EPQState *epqstate,

  226. 								 ResultRelInfo *relinfo,

  227. 								 ItemPointer tupleid,

  228. 								 HeapTuple fdw_trigtuple,

  229. 								 TupleTableSlot *slot);

  230. extern void ExecARUpdateTriggers(EState *estate,

  231. 								 ResultRelInfo *relinfo,

  232. 								 ItemPointer tupleid,

  233. 								 HeapTuple fdw_trigtuple,

  234. 								 TupleTableSlot *slot,

  235. 								 List *recheckIndexes,

  236. 								 TransitionCaptureState *transition_capture);

  237. extern bool ExecIRUpdateTriggers(EState *estate,

  238. 								 ResultRelInfo *relinfo,

  239. 								 HeapTuple trigtuple,

  240. 								 TupleTableSlot *slot);

  241. extern void ExecBSTruncateTriggers(EState *estate,

  242. 								   ResultRelInfo *relinfo);

  243. extern void ExecASTruncateTriggers(EState *estate,

  244. 								   ResultRelInfo *relinfo);

  245. 

  246. extern void AfterTriggerBeginXact(void);

  247. extern void AfterTriggerBeginQuery(void);

  248. extern void AfterTriggerEndQuery(EState *estate);

  249. extern void AfterTriggerFireDeferred(void);

  250. extern void AfterTriggerEndXact(bool isCommit);

  251. extern void AfterTriggerBeginSubXact(void);

  252. extern void AfterTriggerEndSubXact(bool isCommit);

  253. extern void AfterTriggerSetState(ConstraintsSetStmt *stmt);

  254. extern bool AfterTriggerPendingOnRel(Oid relid);

  255. 

  256. 

  257. /*

  258.  * in utils/adt/ri_triggers.c

  259.  */

  260. extern bool RI_FKey_pk_upd_check_required(Trigger *trigger, Relation pk_rel,

  261. 										  TupleTableSlot *old_slot, TupleTableSlot *new_slot);

  262. extern bool RI_FKey_fk_upd_check_required(Trigger *trigger, Relation fk_rel,

  263. 										  TupleTableSlot *old_slot, TupleTableSlot *new_slot);

  264. extern bool RI_Initial_Check(Trigger *trigger,

  265. 							 Relation fk_rel, Relation pk_rel);

  266. extern void RI_PartitionRemove_Check(Trigger *trigger, Relation fk_rel,

  267. 									 Relation pk_rel);

  268. 

  269. /* result values for RI_FKey_trigger_type: */

  270. #define RI_TRIGGER_PK	1		/* is a trigger on the PK relation */

  271. #define RI_TRIGGER_FK	2		/* is a trigger on the FK relation */

  272. #define RI_TRIGGER_NONE 0		/* is not an RI trigger function */

  273. 

  274. extern int	RI_FKey_trigger_type(Oid tgfoid);

  275. 

  276. #endif							/* TRIGGER_H */
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