greenplumn pg_extprotocol 源码
greenplumn pg_extprotocol 代码
文件路径：/src/include/catalog/pg_extprotocol.h
/*-------------------------------------------------------------------------
*
* pg_extprotocol.h
* an external table custom protocol table
*
* Portions Copyright (c) 2011, Greenplum Inc.
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/include/catalog/pg_extprotocol.h
*
*-------------------------------------------------------------------------
*/
#ifndef PG_EXTPROTOCOL_H
#define PG_EXTPROTOCOL_H
#include "catalog/genbki.h"
#include "catalog/pg_extprotocol_d.h"
#include "nodes/pg_list.h"
#include "utils/acl.h"
/* ----------------
* pg_extprotocol definition. cpp turns this into
* typedef struct FormData_pg_extprotocol
* ----------------
*/
CATALOG(pg_extprotocol,7175,ExtprotocolRelationId)
{
Oid oid; /* oid */
NameData ptcname;
Oid ptcreadfn;
Oid ptcwritefn;
Oid ptcvalidatorfn;
Oid ptcowner;
bool ptctrusted;
#ifdef CATALOG_VARLEN /* variable-length fields start here */
aclitem ptcacl[1];
#endif
} FormData_pg_extprotocol;
/* GPDB added foreign key definitions for gpcheckcat. */
FOREIGN_KEY(ptcreadfn REFERENCES pg_proc(oid));
FOREIGN_KEY(ptcwritefn REFERENCES pg_proc(oid));
FOREIGN_KEY(ptcvalidatorfn REFERENCES pg_proc(oid));
/* ----------------
* Form_pg_extprotocol corresponds to a pointer to a tuple with
* the format of pg_extprotocol relation.
* ----------------
*/
typedef FormData_pg_extprotocol *Form_pg_extprotocol;
/*
* Different type of functions that can be
* specified for a given external protocol.
*/
typedef enum ExtPtcFuncType
{
EXTPTC_FUNC_READER,
EXTPTC_FUNC_WRITER,
EXTPTC_FUNC_VALIDATOR
} ExtPtcFuncType;
extern Oid
ExtProtocolCreate(const char *protocolName,
List *readfuncName,
List *writefuncName,
List *validatorfuncName,
bool trusted);
extern Oid
LookupExtProtocolFunction(const char *prot_name,
ExtPtcFuncType prot_type,
bool error);
extern Oid get_extprotocol_oid(const char *prot_name, bool error_if_missing);
extern char *
ExtProtocolGetNameByOid(Oid protOid);
#endif /* PG_EXTPROTOCOL_H */
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