greenplumn pg_enum 源码
greenplumn pg_enum 代码
文件路径：/src/include/catalog/pg_enum.h
/*-------------------------------------------------------------------------
*
* pg_enum.h
* definition of the "enum" system catalog (pg_enum)
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_enum.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_ENUM_H
#define PG_ENUM_H
#include "catalog/genbki.h"
#include "catalog/pg_enum_d.h"
#include "nodes/pg_list.h"
/* ----------------
* pg_enum definition. cpp turns this into
* typedef struct FormData_pg_enum
* ----------------
*/
CATALOG(pg_enum,3501,EnumRelationId)
{
Oid oid; /* oid */
Oid enumtypid; /* OID of owning enum type */
float4 enumsortorder; /* sort position of this enum value */
NameData enumlabel; /* text representation of enum value */
} FormData_pg_enum;
/* GPDB added foreign key definitions for gpcheckcat. */
FOREIGN_KEY(enumtypid REFERENCES pg_type(oid));
/* ----------------
* Form_pg_enum corresponds to a pointer to a tuple with
* the format of pg_enum relation.
* ----------------
*/
typedef FormData_pg_enum *Form_pg_enum;
/*
* prototypes for functions in pg_enum.c
*/
extern void EnumValuesCreate(Oid enumTypeOid, List *vals);
extern void EnumValuesDelete(Oid enumTypeOid);
extern void AddEnumLabel(Oid enumTypeOid, const char *newVal,
const char *neighbor, bool newValIsAfter,
bool skipIfExists);
extern void RenameEnumLabel(Oid enumTypeOid,
const char *oldVal, const char *newVal);
extern bool EnumBlacklisted(Oid enum_id);
extern Size EstimateEnumBlacklistSpace(void);
extern void SerializeEnumBlacklist(void *space, Size size);
extern void RestoreEnumBlacklist(void *space);
extern void AtEOXact_Enum(void);
#endif /* PG_ENUM_H */
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