greenplumn pg_database 源码
greenplumn pg_database 代码
文件路径：/src/include/catalog/pg_database.h
/*-------------------------------------------------------------------------
*
* pg_database.h
* definition of the "database" system catalog (pg_database)
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_database.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_DATABASE_H
#define PG_DATABASE_H
#include "catalog/genbki.h"
#include "catalog/pg_database_d.h"
/* ----------------
* pg_database definition. cpp turns this into
* typedef struct FormData_pg_database
* ----------------
*/
CATALOG(pg_database,1262,DatabaseRelationId) BKI_SHARED_RELATION BKI_ROWTYPE_OID(1248,DatabaseRelation_Rowtype_Id) BKI_SCHEMA_MACRO
{
/* oid */
Oid oid;
/* database name */
NameData datname;
/* owner of database */
Oid datdba BKI_DEFAULT(PGUID);
/* character encoding */
int32 encoding;
/* LC_COLLATE setting */
NameData datcollate;
/* LC_CTYPE setting */
NameData datctype;
/* allowed as CREATE DATABASE template? */
bool datistemplate;
/* new connections allowed? */
bool datallowconn;
/* max connections allowed (-1=no limit) */
int32 datconnlimit;
/* highest OID to consider a system OID */
Oid datlastsysoid;
/* all Xids < this are frozen in this DB */
TransactionId datfrozenxid;
/* all multixacts in the DB are >= this */
TransactionId datminmxid;
/* default table space for this DB */
Oid dattablespace BKI_LOOKUP(pg_tablespace);
#ifdef CATALOG_VARLEN /* variable-length fields start here */
/* access permissions */
aclitem datacl[1];
#endif
} FormData_pg_database;
/* GPDB added foreign key definitions for gpcheckcat. */
FOREIGN_KEY(datdba REFERENCES pg_authid(oid));
FOREIGN_KEY(dattablespace REFERENCES pg_tablespace(oid));
/* ----------------
* Form_pg_database corresponds to a pointer to a tuple with
* the format of pg_database relation.
* ----------------
*/
typedef FormData_pg_database *Form_pg_database;
#endif /* PG_DATABASE_H */
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