Clickhouse DateTime64 extended range (#222)

Clickhouse DateTime64 extended range ClickHouse/ClickHouse#9404
mymarilyn · Jun 4, 2021 · 0e7f0b2 · 0e7f0b2
1 parent ddb4a6e
commit 0e7f0b2
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diff --git a/clickhouse_driver/columns/datetimecolumn.py b/clickhouse_driver/columns/datetimecolumn.py
@@ -87,7 +87,7 @@ def before_write_items(self, items, nulls_map=None):
 
 class DateTime64Column(DateTimeColumn):
     ch_type = 'DateTime64'
-    format = 'Q'
+    format = 'q'
 
     max_scale = 6
 

diff --git a/tests/columns/test_datetime.py b/tests/columns/test_datetime.py
@@ -135,6 +135,21 @@ def test_insert_integer_bounds(self):
             inserted = self.emit_cli(query)
             self.assertEqual(inserted, '0\n1\n1500000000\n4294967295\n')
 
+    @require_server_version(21, 4)
+    def test_insert_datetime64_extended_range(self):
+        with self.create_table("a DateTime64(0, 'UTC')"):
+            self.client.execute(
+                'INSERT INTO test (a) VALUES',
+                [(0, ), (1, ), (-2**63, ), (2**63-1, )]
+            )
+
+            query = 'SELECT toInt64(a) FROM test ORDER BY a'
+            inserted = self.emit_cli(query)
+            self.assertEqual(
+                inserted,
+                '-9223372036854775808\n0\n1\n9223372036854775807\n'
+            )
+
 
 class DateTimeTimezonesTestCase(BaseDateTimeTestCase):
     dt_type = 'DateTime'