greenplumn relmapdesc 源码
greenplumn relmapdesc 代码
文件路径：/src/backend/access/rmgrdesc/relmapdesc.c
/*-------------------------------------------------------------------------
*
* relmapdesc.c
* rmgr descriptor routines for utils/cache/relmapper.c
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/relmapdesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/relmapper.h"
void
relmap_desc(StringInfo buf, XLogReaderState *record)
{
char *rec = XLogRecGetData(record);
uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
if (info == XLOG_RELMAP_UPDATE)
{
xl_relmap_update *xlrec = (xl_relmap_update *) rec;
appendStringInfo(buf, "database %u tablespace %u size %u",
xlrec->dbid, xlrec->tsid, xlrec->nbytes);
}
}
const char *
relmap_identify(uint8 info)
{
const char *id = NULL;
switch (info & ~XLR_INFO_MASK)
{
case XLOG_RELMAP_UPDATE:
id = "UPDATE";
break;
}
return id;
}
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