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This commit is contained in:
Ian Barwick
2017-06-28 17:28:20 +09:00
parent ded8d95e5a
commit f4e8bf891d
4 changed files with 65 additions and 16 deletions
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45
repmgr.c
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@@ -18,8 +18,16 @@
#include "storage/shmem.h"
#include "storage/spin.h"
#include "utils/builtins.h"
#include "utils/pg_lsn.h"
#include "utils/timestamp.h"
#include "executor/spi.h"
#include "lib/stringinfo.h"
#include "access/xact.h"
#include "utils/snapmgr.h"
#include "pgstat.h"
#include "voting.h"
#define MAXFNAMELEN 64
@@ -137,11 +145,42 @@ repmgr_shmem_startup(void)
Datum
request_vote(PG_FUNCTION_ARGS)
{
uint32 node_id = PG_GETARG_INT32(0);
/* node_id used for logging purposes */
int requesting_node_id = PG_GETARG_INT32(0);
XLogRecPtr requesting_node_last_lsn = PG_GETARG_LSN(1);
StringInfoData query;
elog(INFO, "id is %i", node_id);
int ret;
bool isnull;
PG_RETURN_BOOL(true);
int lsn_diff;
elog(INFO, "id is %i, lsn: %X/%X",
requesting_node_id,
(uint32) (requesting_node_last_lsn >> 32),
(uint32) requesting_node_last_lsn);
SPI_connect();
initStringInfo(&query);
appendStringInfo(
&query,
"SELECT '%X/%X'::pg_lsn - pg_catalog.pg_last_wal_receive_lsn()::pg_lsn",
(uint32) (requesting_node_last_lsn >> 32),
(uint32) requesting_node_last_lsn);
ret = SPI_execute(query.data, false, 0);
lsn_diff = DatumGetInt32(SPI_getbinval(SPI_tuptable->vals[0],
SPI_tuptable->tupdesc,
1, &isnull));
elog(INFO, "XXX diff is %i",
lsn_diff);
SPI_finish();
PG_RETURN_INT32(lsn_diff);
}