1 /*-------------------------------------------------------------------------
4 * definition of the system "relation" relation (pg_class)
5 * along with the relation's initial contents.
8 * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
9 * Portions Copyright (c) 1994, Regents of the University of California
11 * $PostgreSQL: pgsql/src/include/catalog/pg_class.h,v 1.122 2010/02/26 02:01:21 momjian Exp $
14 * the genbki.pl script reads this file and generates .bki
15 * information from the DATA() statements.
17 *-------------------------------------------------------------------------
22 #include "catalog/genbki.h"
25 * pg_class definition. cpp turns this into
26 * typedef struct FormData_pg_class
29 #define RelationRelationId 1259
30 #define RelationRelation_Rowtype_Id 83
32 CATALOG(pg_class,1259) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83) BKI_SCHEMA_MACRO
34 NameData relname; /* class name */
35 Oid relnamespace; /* OID of namespace containing this class */
36 Oid reltype; /* OID of entry in pg_type for table's
37 * implicit row type */
38 Oid reloftype; /* OID of entry in pg_type for underlying
40 Oid relowner; /* class owner */
41 Oid relam; /* index access method; 0 if not an index */
42 Oid relfilenode; /* identifier of physical storage file */
44 /* relfilenode == 0 means it is a "mapped" relation, see relmapper.c */
45 Oid reltablespace; /* identifier of table space for relation */
46 int4 relpages; /* # of blocks (not always up-to-date) */
47 float4 reltuples; /* # of tuples (not always up-to-date) */
48 Oid reltoastrelid; /* OID of toast table; 0 if none */
49 Oid reltoastidxid; /* if toast table, OID of chunk_id index */
50 bool relhasindex; /* T if has (or has had) any indexes */
51 bool relisshared; /* T if shared across databases */
52 bool relistemp; /* T if temporary relation */
53 char relkind; /* see RELKIND_xxx constants below */
54 int2 relnatts; /* number of user attributes */
57 * Class pg_attribute must contain exactly "relnatts" user attributes
58 * (with attnums ranging from 1 to relnatts) for this class. It may also
59 * contain entries with negative attnums for system attributes.
61 int2 relchecks; /* # of CHECK constraints for class */
62 bool relhasoids; /* T if we generate OIDs for rows of rel */
63 bool relhaspkey; /* has (or has had) PRIMARY KEY index */
64 bool relhasexclusion; /* has (or has had) exclusion constraint */
65 bool relhasrules; /* has (or has had) any rules */
66 bool relhastriggers; /* has (or has had) any TRIGGERs */
67 bool relhassubclass; /* has (or has had) derived classes */
68 TransactionId relfrozenxid; /* all Xids < this are frozen in this rel */
71 * VARIABLE LENGTH FIELDS start here. These fields may be NULL, too.
73 * NOTE: these fields are not present in a relcache entry's rd_rel field.
76 aclitem relacl[1]; /* access permissions */
77 text reloptions[1]; /* access-method-specific options */
80 /* Size of fixed part of pg_class tuples, not counting var-length fields */
81 #define CLASS_TUPLE_SIZE \
82 (offsetof(FormData_pg_class,relfrozenxid) + sizeof(TransactionId))
85 * Form_pg_class corresponds to a pointer to a tuple with
86 * the format of pg_class relation.
89 typedef FormData_pg_class *Form_pg_class;
92 * compiler constants for pg_class
96 #define Natts_pg_class 27
97 #define Anum_pg_class_relname 1
98 #define Anum_pg_class_relnamespace 2
99 #define Anum_pg_class_reltype 3
100 #define Anum_pg_class_reloftype 4
101 #define Anum_pg_class_relowner 5
102 #define Anum_pg_class_relam 6
103 #define Anum_pg_class_relfilenode 7
104 #define Anum_pg_class_reltablespace 8
105 #define Anum_pg_class_relpages 9
106 #define Anum_pg_class_reltuples 10
107 #define Anum_pg_class_reltoastrelid 11
108 #define Anum_pg_class_reltoastidxid 12
109 #define Anum_pg_class_relhasindex 13
110 #define Anum_pg_class_relisshared 14
111 #define Anum_pg_class_relistemp 15
112 #define Anum_pg_class_relkind 16
113 #define Anum_pg_class_relnatts 17
114 #define Anum_pg_class_relchecks 18
115 #define Anum_pg_class_relhasoids 19
116 #define Anum_pg_class_relhaspkey 20
117 #define Anum_pg_class_relhasexclusion 21
118 #define Anum_pg_class_relhasrules 22
119 #define Anum_pg_class_relhastriggers 23
120 #define Anum_pg_class_relhassubclass 24
121 #define Anum_pg_class_relfrozenxid 25
122 #define Anum_pg_class_relacl 26
123 #define Anum_pg_class_reloptions 27
126 * initial contents of pg_class
128 * NOTE: only "bootstrapped" relations need to be declared here. Be sure that
129 * the OIDs listed here match those given in their CATALOG macros, and that
130 * the relnatts values are correct.
134 /* Note: "3" in the relfrozenxid column stands for FirstNormalTransactionId */
135 DATA(insert OID = 1247 ( pg_type PGNSP 71 0 PGUID 0 0 0 0 0 0 0 f f f r 28 0 t f f f f f 3 _null_ _null_ ));
137 DATA(insert OID = 1249 ( pg_attribute PGNSP 75 0 PGUID 0 0 0 0 0 0 0 f f f r 19 0 f f f f f f 3 _null_ _null_ ));
139 DATA(insert OID = 1255 ( pg_proc PGNSP 81 0 PGUID 0 0 0 0 0 0 0 f f f r 25 0 t f f f f f 3 _null_ _null_ ));
141 DATA(insert OID = 1259 ( pg_class PGNSP 83 0 PGUID 0 0 0 0 0 0 0 f f f r 27 0 t f f f f f 3 _null_ _null_ ));
144 #define RELKIND_INDEX 'i' /* secondary index */
145 #define RELKIND_RELATION 'r' /* ordinary cataloged heap */
146 #define RELKIND_SEQUENCE 'S' /* SEQUENCE relation */
147 #define RELKIND_UNCATALOGED 'u' /* temporary heap */
148 #define RELKIND_TOASTVALUE 't' /* moved off huge values */
149 #define RELKIND_VIEW 'v' /* view */
150 #define RELKIND_COMPOSITE_TYPE 'c' /* composite type */
152 #endif /* PG_CLASS_H */