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140 lines
5.4 KiB
140 lines
5.4 KiB
/*-------------------------------------------------------------------------
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*
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* pg_class.h
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* definition of the "relation" system catalog (pg_class)
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*
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*
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* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/catalog/pg_class.h
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*
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* NOTES
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* The Catalog.pm module reads this file and derives schema
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* information.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_CLASS_H
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#define PG_CLASS_H
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#include "catalog/genbki.h"
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#include "catalog/pg_class_d.h"
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/* ----------------
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* pg_class definition. cpp turns this into
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* typedef struct FormData_pg_class
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* ----------------
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*/
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CATALOG(pg_class,1259,RelationRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83,RelationRelation_Rowtype_Id) BKI_SCHEMA_MACRO
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{
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Oid oid; /* oid */
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NameData relname; /* class name */
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Oid relnamespace; /* OID of namespace containing this class */
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Oid reltype; /* OID of entry in pg_type for table's
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* implicit row type */
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Oid reloftype; /* OID of entry in pg_type for underlying
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* composite type */
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Oid relowner; /* class owner */
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Oid relam; /* access method; 0 if not a table / index */
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Oid relfilenode; /* identifier of physical storage file */
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/* relfilenode == 0 means it is a "mapped" relation, see relmapper.c */
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Oid reltablespace; /* identifier of table space for relation */
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int32 relpages; /* # of blocks (not always up-to-date) */
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float4 reltuples; /* # of tuples (not always up-to-date) */
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int32 relallvisible; /* # of all-visible blocks (not always
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* up-to-date) */
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Oid reltoastrelid; /* OID of toast table; 0 if none */
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bool relhasindex; /* T if has (or has had) any indexes */
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bool relisshared; /* T if shared across databases */
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char relpersistence; /* see RELPERSISTENCE_xxx constants below */
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char relkind; /* see RELKIND_xxx constants below */
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int16 relnatts; /* number of user attributes */
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/*
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* Class pg_attribute must contain exactly "relnatts" user attributes
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* (with attnums ranging from 1 to relnatts) for this class. It may also
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* contain entries with negative attnums for system attributes.
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*/
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int16 relchecks; /* # of CHECK constraints for class */
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bool relhasrules; /* has (or has had) any rules */
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bool relhastriggers; /* has (or has had) any TRIGGERs */
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bool relhassubclass; /* has (or has had) child tables or indexes */
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bool relrowsecurity; /* row security is enabled or not */
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bool relforcerowsecurity; /* row security forced for owners or
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* not */
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bool relispopulated; /* matview currently holds query results */
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char relreplident; /* see REPLICA_IDENTITY_xxx constants */
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bool relispartition; /* is relation a partition? */
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Oid relrewrite; /* heap for rewrite during DDL, link to
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* original rel */
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TransactionId relfrozenxid; /* all Xids < this are frozen in this rel */
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TransactionId relminmxid; /* all multixacts in this rel are >= this.
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* this is really a MultiXactId */
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#ifdef CATALOG_VARLEN /* variable-length fields start here */
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/* NOTE: These fields are not present in a relcache entry's rd_rel field. */
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aclitem relacl[1]; /* access permissions */
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text reloptions[1]; /* access-method-specific options */
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pg_node_tree relpartbound; /* partition bound node tree */
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#endif
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} FormData_pg_class;
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/* Size of fixed part of pg_class tuples, not counting var-length fields */
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#define CLASS_TUPLE_SIZE \
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(offsetof(FormData_pg_class,relminmxid) + sizeof(TransactionId))
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/* ----------------
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* Form_pg_class corresponds to a pointer to a tuple with
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* the format of pg_class relation.
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* ----------------
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*/
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typedef FormData_pg_class *Form_pg_class;
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#ifdef EXPOSE_TO_CLIENT_CODE
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#define RELKIND_RELATION 'r' /* ordinary table */
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#define RELKIND_INDEX 'i' /* secondary index */
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#define RELKIND_SEQUENCE 'S' /* sequence object */
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#define RELKIND_TOASTVALUE 't' /* for out-of-line values */
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#define RELKIND_VIEW 'v' /* view */
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#define RELKIND_MATVIEW 'm' /* materialized view */
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#define RELKIND_COMPOSITE_TYPE 'c' /* composite type */
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#define RELKIND_FOREIGN_TABLE 'f' /* foreign table */
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#define RELKIND_PARTITIONED_TABLE 'p' /* partitioned table */
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#define RELKIND_PARTITIONED_INDEX 'I' /* partitioned index */
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#define RELPERSISTENCE_PERMANENT 'p' /* regular table */
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#define RELPERSISTENCE_UNLOGGED 'u' /* unlogged permanent table */
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#define RELPERSISTENCE_TEMP 't' /* temporary table */
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/* default selection for replica identity (primary key or nothing) */
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#define REPLICA_IDENTITY_DEFAULT 'd'
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/* no replica identity is logged for this relation */
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#define REPLICA_IDENTITY_NOTHING 'n'
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/* all columns are logged as replica identity */
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#define REPLICA_IDENTITY_FULL 'f'
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/*
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* an explicitly chosen candidate key's columns are used as replica identity.
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* Note this will still be set if the index has been dropped; in that case it
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* has the same meaning as 'd'.
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*/
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#define REPLICA_IDENTITY_INDEX 'i'
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/*
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* Relation kinds that have physical storage. These relations normally have
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* relfilenode set to non-zero, but it can also be zero if the relation is
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* mapped.
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*/
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#define RELKIND_HAS_STORAGE(relkind) \
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((relkind) == RELKIND_RELATION || \
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(relkind) == RELKIND_INDEX || \
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(relkind) == RELKIND_SEQUENCE || \
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(relkind) == RELKIND_TOASTVALUE || \
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(relkind) == RELKIND_MATVIEW)
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#endif /* EXPOSE_TO_CLIENT_CODE */
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#endif /* PG_CLASS_H */
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