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/*------------------------------------------------------------------------- * * pg_depend.h * definition of the system "dependency" relation (pg_depend) * along with the relation's initial contents. * * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/catalog/pg_depend.h * * NOTES * the genbki.pl script reads this file and generates .bki * information from the DATA() statements. * *------------------------------------------------------------------------- */ #ifndef PG_DEPEND_H #define PG_DEPEND_H #include "catalog/genbki.h" /* ---------------- * pg_depend definition. cpp turns this into * typedef struct FormData_pg_depend * ---------------- */ #define DependRelationId 2608 CATALOG(pg_depend,2608) BKI_WITHOUT_OIDS { /* * Identification of the dependent (referencing) object. * * These fields are all zeroes for a DEPENDENCY_PIN entry. */ Oid classid; /* OID of table containing object */ Oid objid; /* OID of object itself */ int32 objsubid; /* column number, or 0 if not used */ /* * Identification of the independent (referenced) object. */ Oid refclassid; /* OID of table containing object */ Oid refobjid; /* OID of object itself */ int32 refobjsubid; /* column number, or 0 if not used */ /* * Precise semantics of the relationship are specified by the deptype * field. See DependencyType in catalog/dependency.h. */ char deptype; /* see codes in dependency.h */ } FormData_pg_depend; /* ---------------- * Form_pg_depend corresponds to a pointer to a row with * the format of pg_depend relation. * ---------------- */ typedef FormData_pg_depend *Form_pg_depend; /* ---------------- * compiler constants for pg_depend * ---------------- */ #define Natts_pg_depend 7 #define Anum_pg_depend_classid 1 #define Anum_pg_depend_objid 2 #define Anum_pg_depend_objsubid 3 #define Anum_pg_depend_refclassid 4 #define Anum_pg_depend_refobjid 5 #define Anum_pg_depend_refobjsubid 6 #define Anum_pg_depend_deptype 7 /* * pg_depend has no preloaded contents; system-defined dependencies are * loaded into it during a late stage of the initdb process. * * NOTE: we do not represent all possible dependency pairs in pg_depend; * for example, there's not much value in creating an explicit dependency * from an attribute to its relation. Usually we make a dependency for * cases where the relationship is conditional rather than essential * (for example, not all triggers are dependent on constraints, but all * attributes are dependent on relations) or where the dependency is not * convenient to find from the contents of other catalogs. */ #endif /* PG_DEPEND_H */