greenplumn gp_configuration_history 源码
greenplumn gp_configuration_history 代码
文件路径：/src/include/catalog/gp_configuration_history.h
/*-------------------------------------------------------------------------
*
* gp_configuration_history.h
* changes in Greenplum system configuration captured in chronological order
*
*
* Portions Copyright (c) 2006-2010, Greenplum inc.
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/include/catalog/gp_configuration_history.h
*
* NOTES
* the genbki.sh script reads this file and generates .bki
* information from the DATA() statements.
*
*-------------------------------------------------------------------------
*/
#ifndef _GP_CONFIGURATION_HISTORY_H_
#define _GP_CONFIGURATION_HISTORY_H_
#include "catalog/genbki.h"
#include "catalog/gp_configuration_history_d.h"
/*
* Defines for gp_configuration_history table
*
* Used by fault-management components to record a "change history" description
* with timestamp.
*/
/*
* The CATALOG definition has to refer to the type of "time" as
* "timestamptz" (lower case) so that bootstrap mode recognizes it. But
* the C header files define this type as TimestampTz. Since the field is
* potentially-null and therefore cannot be accessed directly from C code,
* there is no particular need for the C struct definition to show the
* field type as TimestampTz --- instead we just make it Datum.
*/
#define timestamptz Datum
/* ----------------
* gp_configuration_history definition. cpp turns this into
* typedef struct FormData_gp_configuration_history
* ----------------
*/
CATALOG(gp_configuration_history,5106,GpConfigHistoryRelationId) BKI_SHARED_RELATION
{
timestamptz time;
int16 dbid;
text desc;
} FormData_gp_configuration_history;
/* no foreign keys */
#undef timestamptz
/* ----------------
* Form_gp_configuration_history corresponds to a pointer to a tuple with
* the format of gp_configuration_history relation.
* ----------------
*/
typedef FormData_gp_configuration_history *Form_gp_configuration_history;
#endif /*_GP_CONFIGURATION_HISTORY_H_*/
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