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/*------------------------------------------------------------------------- * * pg_trigger.h * definition of the system "trigger" relation (pg_trigger) * along with the relation's initial contents. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/catalog/pg_trigger.h * * NOTES * the genbki.pl script reads this file and generates .bki * information from the DATA() statements. * *------------------------------------------------------------------------- */ #ifndef PG_TRIGGER_H #define PG_TRIGGER_H #include "catalog/genbki.h" /* ---------------- * pg_trigger definition. cpp turns this into * typedef struct FormData_pg_trigger * * Note: when tgconstraint is nonzero, tgconstrrelid, tgconstrindid, * tgdeferrable, and tginitdeferred are largely redundant with the referenced * pg_constraint entry. However, it is possible for a non-deferrable trigger * to be associated with a deferrable constraint. * ---------------- */ #define TriggerRelationId 2620 CATALOG(pg_trigger,2620) { Oid tgrelid; /* relation trigger is attached to */ NameData tgname; /* trigger's name */ Oid tgfoid; /* OID of function to be called */ int2 tgtype; /* BEFORE/AFTER/INSTEAD, UPDATE/DELETE/INSERT, * ROW/STATEMENT; see below */ char tgenabled; /* trigger's firing configuration WRT * session_replication_role */ bool tgisinternal; /* trigger is system-generated */ Oid tgconstrrelid; /* constraint's FROM table, if any */ Oid tgconstrindid; /* constraint's supporting index, if any */ Oid tgconstraint; /* associated pg_constraint entry, if any */ bool tgdeferrable; /* constraint trigger is deferrable */ bool tginitdeferred; /* constraint trigger is deferred initially */ int2 tgnargs; /* # of extra arguments in tgargs */ /* * Variable-length fields start here, but we allow direct access to * tgattr. Note: tgattr and tgargs must not be null. */ int2vector tgattr; /* column numbers, if trigger is on columns */ #ifdef CATALOG_VARLEN bytea tgargs; /* first\000second\000tgnargs\000 */ pg_node_tree tgqual; /* WHEN expression, or NULL if none */ #endif } FormData_pg_trigger; /* ---------------- * Form_pg_trigger corresponds to a pointer to a tuple with * the format of pg_trigger relation. * ---------------- */ typedef FormData_pg_trigger *Form_pg_trigger; /* ---------------- * compiler constants for pg_trigger * ---------------- */ #define Natts_pg_trigger 15 #define Anum_pg_trigger_tgrelid 1 #define Anum_pg_trigger_tgname 2 #define Anum_pg_trigger_tgfoid 3 #define Anum_pg_trigger_tgtype 4 #define Anum_pg_trigger_tgenabled 5 #define Anum_pg_trigger_tgisinternal 6 #define Anum_pg_trigger_tgconstrrelid 7 #define Anum_pg_trigger_tgconstrindid 8 #define Anum_pg_trigger_tgconstraint 9 #define Anum_pg_trigger_tgdeferrable 10 #define Anum_pg_trigger_tginitdeferred 11 #define Anum_pg_trigger_tgnargs 12 #define Anum_pg_trigger_tgattr 13 #define Anum_pg_trigger_tgargs 14 #define Anum_pg_trigger_tgqual 15 /* Bits within tgtype */ #define TRIGGER_TYPE_ROW (1 << 0) #define TRIGGER_TYPE_BEFORE (1 << 1) #define TRIGGER_TYPE_INSERT (1 << 2) #define TRIGGER_TYPE_DELETE (1 << 3) #define TRIGGER_TYPE_UPDATE (1 << 4) #define TRIGGER_TYPE_TRUNCATE (1 << 5) #define TRIGGER_TYPE_INSTEAD (1 << 6) #define TRIGGER_TYPE_LEVEL_MASK (TRIGGER_TYPE_ROW) #define TRIGGER_TYPE_STATEMENT 0 /* Note bits within TRIGGER_TYPE_TIMING_MASK aren't adjacent */ #define TRIGGER_TYPE_TIMING_MASK \ (TRIGGER_TYPE_BEFORE | TRIGGER_TYPE_INSTEAD) #define TRIGGER_TYPE_AFTER 0 #define TRIGGER_TYPE_EVENT_MASK \ (TRIGGER_TYPE_INSERT | TRIGGER_TYPE_DELETE | TRIGGER_TYPE_UPDATE | TRIGGER_TYPE_TRUNCATE) /* Macros for manipulating tgtype */ #define TRIGGER_CLEAR_TYPE(type) ((type) = 0) #define TRIGGER_SETT_ROW(type) ((type) |= TRIGGER_TYPE_ROW) #define TRIGGER_SETT_STATEMENT(type) ((type) |= TRIGGER_TYPE_STATEMENT) #define TRIGGER_SETT_BEFORE(type) ((type) |= TRIGGER_TYPE_BEFORE) #define TRIGGER_SETT_AFTER(type) ((type) |= TRIGGER_TYPE_AFTER) #define TRIGGER_SETT_INSTEAD(type) ((type) |= TRIGGER_TYPE_INSTEAD) #define TRIGGER_SETT_INSERT(type) ((type) |= TRIGGER_TYPE_INSERT) #define TRIGGER_SETT_DELETE(type) ((type) |= TRIGGER_TYPE_DELETE) #define TRIGGER_SETT_UPDATE(type) ((type) |= TRIGGER_TYPE_UPDATE) #define TRIGGER_SETT_TRUNCATE(type) ((type) |= TRIGGER_TYPE_TRUNCATE) #define TRIGGER_FOR_ROW(type) ((type) & TRIGGER_TYPE_ROW) #define TRIGGER_FOR_BEFORE(type) (((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_BEFORE) #define TRIGGER_FOR_AFTER(type) (((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_AFTER) #define TRIGGER_FOR_INSTEAD(type) (((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_INSTEAD) #define TRIGGER_FOR_INSERT(type) ((type) & TRIGGER_TYPE_INSERT) #define TRIGGER_FOR_DELETE(type) ((type) & TRIGGER_TYPE_DELETE) #define TRIGGER_FOR_UPDATE(type) ((type) & TRIGGER_TYPE_UPDATE) #define TRIGGER_FOR_TRUNCATE(type) ((type) & TRIGGER_TYPE_TRUNCATE) /* * Efficient macro for checking if tgtype matches a particular level * (TRIGGER_TYPE_ROW or TRIGGER_TYPE_STATEMENT), timing (TRIGGER_TYPE_BEFORE, * TRIGGER_TYPE_AFTER or TRIGGER_TYPE_INSTEAD), and event (TRIGGER_TYPE_INSERT, * TRIGGER_TYPE_DELETE, TRIGGER_TYPE_UPDATE, or TRIGGER_TYPE_TRUNCATE). Note * that a tgtype can match more than one event, but only one level or timing. */ #define TRIGGER_TYPE_MATCHES(type, level, timing, event) \ (((type) & (TRIGGER_TYPE_LEVEL_MASK | TRIGGER_TYPE_TIMING_MASK | (event))) == ((level) | (timing) | (event))) #endif /* PG_TRIGGER_H */