[BUG] Select query on prometheus with only timestamp filter is throwing error. #1243
Description
query : "source=prometheus.process_resident_memory_bytes | where @timestamp >= '2023-01-06 22:52:47' "
error
{
"data": {
"ok": false,
"resp": "Service Unavailable",
"body": "{\n \"error\": {\n \"reason\": \"There was internal problem at backend\",\n \"details\": \"Request to Prometheus is Unsuccessful with : 1:35: parse error: unexpected \\\"}\\\" in label matching, expected label matching operator\",\n \"type\": \"RuntimeException\"\n },\n \"status\": 503\n}"
}
}