greenplumn dbasedesc 源码
greenplumn dbasedesc 代码
文件路径：/src/backend/access/rmgrdesc/dbasedesc.c
/*-------------------------------------------------------------------------
*
* dbasedesc.c
* rmgr descriptor routines for commands/dbcommands.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/dbasedesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "commands/dbcommands_xlog.h"
#include "lib/stringinfo.h"
void
dbase_desc(StringInfo buf, XLogReaderState *record)
{
char *rec = XLogRecGetData(record);
uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
if (info == XLOG_DBASE_CREATE)
{
xl_dbase_create_rec *xlrec = (xl_dbase_create_rec *) rec;
appendStringInfo(buf, "copy dir %u/%u to %u/%u",
xlrec->src_tablespace_id, xlrec->src_db_id,
xlrec->tablespace_id, xlrec->db_id);
}
else if (info == XLOG_DBASE_DROP)
{
xl_dbase_drop_rec *xlrec = (xl_dbase_drop_rec *) rec;
appendStringInfo(buf, "dir %u/%u",
xlrec->tablespace_id, xlrec->db_id);
}
}
const char *
dbase_identify(uint8 info)
{
const char *id = NULL;
switch (info & ~XLR_INFO_MASK)
{
case XLOG_DBASE_CREATE:
id = "CREATE";
break;
case XLOG_DBASE_DROP:
id = "DROP";
break;
}
return id;
}
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