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/*
* objectaccess.h
*
* Object access hooks.
*
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*/
#ifndef OBJECTACCESS_H
#define OBJECTACCESS_H
/*
* Object access hooks are intended to be called just before or just after
* performing certain actions on a SQL object. This is intended as
* infrastructure for security or logging pluggins.
*
* OAT_POST_CREATE should be invoked just after the object is created.
* Typically, this is done after inserting the primary catalog records and
* associated dependencies.
*
* OAT_DROP should be invoked just before deletion of objects; typically
* deleteOneObject(). Its arguments are packed within ObjectAccessDrop.
*
* Other types may be added in the future.
*/
typedef enum ObjectAccessType
{
OAT_POST_CREATE,
OAT_DROP,
} ObjectAccessType;
/*
* Arguments of OAT_POST_CREATE event
*/
typedef struct
{
/*
* This flag informs extensions whether the context of this creation
* is invoked by user's operations, or not. E.g, it shall be dealt
* as internal stuff on toast tables or indexes due to type changes.
*/
bool is_internal;
} ObjectAccessPostCreate;
/*
* Arguments of OAT_DROP event
*/
typedef struct
{
/*
* Flags to inform extensions the context of this deletion. Also see
* PERFORM_DELETION_* in dependency.h
*/
int dropflags;
} ObjectAccessDrop;
/*
* Hook, and a macro to invoke it.
*/
typedef void (*object_access_hook_type) (ObjectAccessType access,
Oid classId,
Oid objectId,
int subId,
void *arg);
extern PGDLLIMPORT object_access_hook_type object_access_hook;
#define InvokeObjectAccessHook(access,classId,objectId,subId,arg) \
do { \
if (object_access_hook) \
(*object_access_hook)((access),(classId), \
(objectId),(subId),(arg)); \
} while(0)
#endif /* OBJECTACCESS_H */
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