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-rw-r--r--src/backend/access/transam/xlogfuncs.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlogfuncs.c b/src/backend/access/transam/xlogfuncs.c
index 42168985e0c..31cbb01ce47 100644
--- a/src/backend/access/transam/xlogfuncs.c
+++ b/src/backend/access/transam/xlogfuncs.c
@@ -216,6 +216,27 @@ pg_current_xlog_insert_location(PG_FUNCTION_ARGS)
}
/*
+ * Report the current WAL flush location (same format as pg_start_backup etc)
+ *
+ * This function is mostly for debugging purposes.
+ */
+Datum
+pg_current_xlog_flush_location(PG_FUNCTION_ARGS)
+{
+ XLogRecPtr current_recptr;
+
+ if (RecoveryInProgress())
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("recovery is in progress"),
+ errhint("WAL control functions cannot be executed during recovery.")));
+
+ current_recptr = GetFlushRecPtr();
+
+ PG_RETURN_LSN(current_recptr);
+}
+
+/*
* Report the last WAL receive location (same format as pg_start_backup etc)
*
* This is useful for determining how much of WAL is guaranteed to be received