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/*------------------------------------------------------------------------- * * foreign.h * support for foreign-data wrappers, servers and user mappings. * * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * * src/include/foreign/foreign.h * *------------------------------------------------------------------------- */ #ifndef FOREIGN_H #define FOREIGN_H #include "nodes/parsenodes.h" /* Helper for obtaining username for user mapping */ #define MappingUserName(userid) \ (OidIsValid(userid) ? GetUserNameFromId(userid, false) : "public") /* * Generic option types for validation. * NB! Thes are treated as flags, so use only powers of two here. */ typedef enum { ServerOpt = 1, /* options applicable to SERVER */ UserMappingOpt = 2, /* options for USER MAPPING */ FdwOpt = 4 /* options for FOREIGN DATA WRAPPER */ } GenericOptionFlags; typedef struct ForeignDataWrapper { Oid fdwid; /* FDW Oid */ Oid owner; /* FDW owner user Oid */ char *fdwname; /* Name of the FDW */ Oid fdwhandler; /* Oid of handler function, or 0 */ Oid fdwvalidator; /* Oid of validator function, or 0 */ List *options; /* fdwoptions as DefElem list */ } ForeignDataWrapper; typedef struct ForeignServer { Oid serverid; /* server Oid */ Oid fdwid; /* foreign-data wrapper */ Oid owner; /* server owner user Oid */ char *servername; /* name of the server */ char *servertype; /* server type, optional */ char *serverversion; /* server version, optional */ List *options; /* srvoptions as DefElem list */ } ForeignServer; typedef struct UserMapping { Oid umid; /* Oid of user mapping */ Oid userid; /* local user Oid */ Oid serverid; /* server Oid */ List *options; /* useoptions as DefElem list */ } UserMapping; typedef struct ForeignTable { Oid relid; /* relation Oid */ Oid serverid; /* server Oid */ List *options; /* ftoptions as DefElem list */ } ForeignTable; extern ForeignServer *GetForeignServer(Oid serverid); extern ForeignServer *GetForeignServerByName(const char *name, bool missing_ok); extern UserMapping *GetUserMapping(Oid userid, Oid serverid); extern ForeignDataWrapper *GetForeignDataWrapper(Oid fdwid); extern ForeignDataWrapper *GetForeignDataWrapperByName(const char *name, bool missing_ok); extern ForeignTable *GetForeignTable(Oid relid); extern List *GetForeignColumnOptions(Oid relid, AttrNumber attnum); extern Oid get_foreign_data_wrapper_oid(const char *fdwname, bool missing_ok); extern Oid get_foreign_server_oid(const char *servername, bool missing_ok); #endif /* FOREIGN_H */