greenplumn pg_conversion 源码
greenplumn pg_conversion 代码
文件路径：/src/include/catalog/pg_conversion.h
/*-------------------------------------------------------------------------
*
* pg_conversion.h
* definition of the "conversion" system catalog (pg_conversion)
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_conversion.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_CONVERSION_H
#define PG_CONVERSION_H
#include "catalog/genbki.h"
#include "catalog/pg_conversion_d.h"
#include "catalog/objectaddress.h"
/* ----------------
* pg_conversion definition. cpp turns this into
* typedef struct FormData_pg_conversion
* ----------------
*/
CATALOG(pg_conversion,2607,ConversionRelationId)
{
/* oid */
Oid oid;
/* name of the conversion */
NameData conname;
/* namespace that the conversion belongs to */
Oid connamespace BKI_DEFAULT(PGNSP);
/* owner of the conversion */
Oid conowner BKI_DEFAULT(PGUID);
/* FOR encoding id */
int32 conforencoding BKI_LOOKUP(encoding);
/* TO encoding id */
int32 contoencoding BKI_LOOKUP(encoding);
/* OID of the conversion proc */
regproc conproc BKI_LOOKUP(pg_proc);
/* true if this is a default conversion */
bool condefault BKI_DEFAULT(t);
} FormData_pg_conversion;
/* GPDB added foreign key definitions for gpcheckcat. */
FOREIGN_KEY(connamespace REFERENCES pg_namespace(oid));
FOREIGN_KEY(conowner REFERENCES pg_authid(oid));
FOREIGN_KEY(conproc REFERENCES pg_proc(oid));
/* ----------------
* Form_pg_conversion corresponds to a pointer to a tuple with
* the format of pg_conversion relation.
* ----------------
*/
typedef FormData_pg_conversion *Form_pg_conversion;
extern ObjectAddress ConversionCreate(const char *conname, Oid connamespace,
Oid conowner,
int32 conforencoding, int32 contoencoding,
Oid conproc, bool def);
extern void RemoveConversionById(Oid conversionOid);
extern Oid FindDefaultConversion(Oid connamespace, int32 for_encoding,
int32 to_encoding);
#endif /* PG_CONVERSION_H */
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