Integration tests - more accurate tests

tests/integration/test_asynchronous_metric_log_table/test.py

@@ -39,9 +39,21 @@ def test_event_time_microseconds_field(started_cluster):
         node1.query(query_create)
         node1.query('''INSERT INTO replica.test VALUES (1, now())''')
         node1.query("SYSTEM FLUSH LOGS;")
-        node1.query("SELECT * FROM system.asynchronous_metrics LIMIT 10")
-        assert "1\n" in node1.query('''SELECT count() from replica.test FORMAT TSV''')
-        assert "ok\n" in node1.query(
-            "SELECT If((select count(event_time_microseconds)  from system.asynchronous_metric_log) > 0, 'ok', 'fail');")
+        #query assumes that the event_time field is accurate
+        equals_query = '''WITH (
+                            (
+                                SELECT event_time_microseconds
+                                FROM system.asynchronous_metric_log
+                                ORDER BY event_time DESC
+                                LIMIT 1
+                            ) AS time_with_microseconds,
+                            (
+                                SELECT event_time
+                                FROM system.asynchronous_metric_log
+                                ORDER BY event_time DESC
+                                LIMIT 1
+                            ) AS time)
+                        SELECT if(dateDiff('second', toDateTime(time_with_microseconds), toDateTime(time)) = 0, 'ok', 'fail')'''
+        assert "ok\n" in node1.query(equals_query)
     finally:
         cluster.shutdown()

tests/queries/0_stateless/01473_event_time_microseconds.sql

@@ -8,4 +8,18 @@ set log_queries = 1;
 select '01473_metric_log_table_event_start_time_microseconds_test';
 system flush logs;
 SELECT sleep(3) Format Null;
-SELECT If((select count(event_time_microseconds)  from system.metric_log) > 0, 'ok', 'fail'); -- success
+-- query assumes that the event_time field is accurate.
+WITH (
+    (
+        SELECT event_time_microseconds
+        FROM system.metric_log
+        ORDER BY event_time DESC
+        LIMIT 1
+    ) AS time_with_microseconds,
+    (
+        SELECT event_time
+        FROM system.metric_log
+        ORDER BY event_time DESC
+        LIMIT 1
+    ) AS time)
+SELECT if(dateDiff('second', toDateTime(time_with_microseconds), toDateTime(time)) = 0, 'ok', 'fail')