granicus.if.org Git - postgresql/blob - src/include/catalog/pg_shdepend.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pg_shdepend.h
   4  *        definition of the system "shared dependency" relation (pg_shdepend)
   5  *        along with the relation's initial contents.
   6  *
   7  *
   8  * Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
   9  * Portions Copyright (c) 1994, Regents of the University of California
  10  *
  11  * src/include/catalog/pg_shdepend.h
  12  *
  13  * NOTES
  14  *        the genbki.pl script reads this file and generates .bki
  15  *        information from the DATA() statements.
  16  *
  17  *-------------------------------------------------------------------------
  18  */
  19 #ifndef PG_SHDEPEND_H
  20 #define PG_SHDEPEND_H
  21
  22 #include "catalog/genbki.h"
  23
  24 /* ----------------
  25  *              pg_shdepend definition.  cpp turns this into
  26  *              typedef struct FormData_pg_shdepend
  27  * ----------------
  28  */
  29 #define SharedDependRelationId  1214
  30
  31 CATALOG(pg_shdepend,1214) BKI_SHARED_RELATION BKI_WITHOUT_OIDS
  32 {
  33         /*
  34          * Identification of the dependent (referencing) object.
  35          *
  36          * These fields are all zeroes for a DEPENDENCY_PIN entry.  Also, dbid can
  37          * be zero to denote a shared object.
  38          */
  39         Oid                     dbid;                   /* OID of database containing object */
  40         Oid                     classid;                /* OID of table containing object */
  41         Oid                     objid;                  /* OID of object itself */
  42         int32           objsubid;               /* column number, or 0 if not used */
  43
  44         /*
  45          * Identification of the independent (referenced) object.  This is always
  46          * a shared object, so we need no database ID field.  We don't bother with
  47          * a sub-object ID either.
  48          */
  49         Oid                     refclassid;             /* OID of table containing object */
  50         Oid                     refobjid;               /* OID of object itself */
  51
  52         /*
  53          * Precise semantics of the relationship are specified by the deptype
  54          * field.  See SharedDependencyType in catalog/dependency.h.
  55          */
  56         char            deptype;                /* see codes in dependency.h */
  57 } FormData_pg_shdepend;
  58
  59 /* ----------------
  60  *              Form_pg_shdepend corresponds to a pointer to a row with
  61  *              the format of pg_shdepend relation.
  62  * ----------------
  63  */
  64 typedef FormData_pg_shdepend *Form_pg_shdepend;
  65
  66 /* ----------------
  67  *              compiler constants for pg_shdepend
  68  * ----------------
  69  */
  70 #define Natts_pg_shdepend                       7
  71 #define Anum_pg_shdepend_dbid           1
  72 #define Anum_pg_shdepend_classid        2
  73 #define Anum_pg_shdepend_objid          3
  74 #define Anum_pg_shdepend_objsubid       4
  75 #define Anum_pg_shdepend_refclassid 5
  76 #define Anum_pg_shdepend_refobjid       6
  77 #define Anum_pg_shdepend_deptype        7
  78
  79
  80 /*
  81  * pg_shdepend has no preloaded contents; system-defined dependencies are
  82  * loaded into it during a late stage of the initdb process.
  83  *
  84  * NOTE: we do not represent all possible dependency pairs in pg_shdepend;
  85  * for example, there's not much value in creating an explicit dependency
  86  * from a relation to its database.  Currently, only dependencies on roles
  87  * are explicitly stored in pg_shdepend.
  88  */
  89
  90 #endif   /* PG_SHDEPEND_H */