/*-------------------------------------------------------------------------  
 *  
 * gp_id.h  
 *        definition of the system "database identifier" relation (gp_dbid)  
 *        along with the relation's initial contents.  
 *  
 * Copyright (c) 2009-2010, Greenplum inc  
 *  
 * NOTES  
 *    Historically this table was used to supply every segment with its  
 * identification information.  However in the 4.0 release when the file  
 * replication feature was added it could no longer serve this purpose  
 * because it became a requirement for all tables to have the same physical  
 * contents on both the primary and mirror segments.  To resolve this the  
 * information is now passed to each segment on startup based on the  
 * gp_segment_configuration (stored on the master only), and each segment  
 * has a file in its datadirectory (gp_dbid) that uniquely identifies the  
 * segment.  
 *  
 *   The contents of the table are now irrelevant, with the exception that  
 * several tools began relying on this table for use as a method of remote  
 * function invocation via gp_dist_random('gp_id') due to the fact that this  
 * table was guaranteed of having exactly one row on every segment.  The  
 * contents of the row have no defined meaning, but this property is still  
 * relied upon.  
 */  
#ifndef _GP_ID_H_  
#define _GP_ID_H_  

#include "catalog/genbki.h"  
/*  
 * Defines for gp_id table  
 */  
#define GpIdRelationName                        "gp_id"  

/* TIDYCAT_BEGINFAKEDEF  

   CREATE TABLE gp_id  
   with (shared=true, oid=false, relid=5001, content=SEGMENT_LOCAL)  
   (  
   gpname       name     ,  
   numsegments  smallint ,  
   dbid         smallint ,  
   content      smallint   
   );  

   TIDYCAT_ENDFAKEDEF  
*/