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Add the possibility to specify an explicit validator function for foreign-data

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wrappers (similar to procedural languages).  This way we don't need to retain
the nearly empty libraries, and we are more free in how to implement the
wrapper API in the future.
This commit is contained in:
Peter Eisentraut
2009-02-24 10:06:36 +00:00
parent f73bed308a
commit 7babccb915
28 changed files with 452 additions and 626 deletions
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28
src/include/foreign/foreign.h
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@@ -6,7 +6,7 @@
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/foreign/foreign.h,v 1.2 2009/01/01 17:23:59 momjian Exp $
* $PostgreSQL: pgsql/src/include/foreign/foreign.h,v 1.3 2009/02/24 10:06:35 petere Exp $
*
*-------------------------------------------------------------------------
*/
@@ -33,17 +33,13 @@ typedef enum {
FdwOpt = 4, /* options for FOREIGN DATA WRAPPER */
} GenericOptionFlags;
typedef struct ForeignDataWrapperLibrary ForeignDataWrapperLibrary;
typedef struct ForeignDataWrapper
{
Oid fdwid; /* FDW Oid */
Oid owner; /* FDW owner user Oid */
char *fdwname; /* Name of the FDW */
char *fdwlibrary; /* Library name */
Oid fdwvalidator;
List *options; /* fdwoptions as DefElem list */
ForeignDataWrapperLibrary *lib; /* interface to the FDW functions */
} ForeignDataWrapper;
typedef struct ForeignServer
@@ -65,25 +61,6 @@ typedef struct UserMapping
} UserMapping;
/*
* Foreign-data wrapper library function types.
*/
typedef void (*OptionListValidatorFunc)(ForeignDataWrapper *,
GenericOptionFlags,
List *);
/*
* Interface functions to the foreign-data wrapper. This is decoupled
* from the FDW as there maybe several FDW-s accessing the same library.
*/
struct ForeignDataWrapperLibrary
{
char *libname; /* name of the library file */
OptionListValidatorFunc validateOptionList;
};
extern ForeignServer *GetForeignServer(Oid serverid);
extern ForeignServer *GetForeignServerByName(const char *name, bool missing_ok);
extern Oid GetForeignServerOidByName(const char *name, bool missing_ok);
@@ -92,7 +69,6 @@ extern ForeignDataWrapper *GetForeignDataWrapper(Oid fdwid);
extern ForeignDataWrapper *GetForeignDataWrapperByName(const char *name,
bool missing_ok);
extern Oid GetForeignDataWrapperOidByName(const char *name, bool missing_ok);
extern ForeignDataWrapperLibrary *GetForeignDataWrapperLibrary(const char *libname);
/* Foreign data wrapper interface functions */
extern void _pg_validateOptionList(ForeignDataWrapper *fdw,