fix(mysql): render dates and timestamps correctly

Author: cpcloud

ibis/backends/mysql/registry.py

@@ -98,6 +98,11 @@ def _literal(_, op):
         #
         # This lets the database handle encoding rather than ibis
         return sa.cast(sa.literal(value), type_=sa.BINARY())
+    elif dtype.is_date():
+        return sa.func.date(value.isoformat())
+    elif dtype.is_timestamp():
+        # TODO: timezones
+        return sa.func.timestamp(value.isoformat())
     elif dtype.is_time():
         return sa.func.maketime(
             value.hour, value.minute, value.second + value.microsecond / 1e6

ibis/backends/tests/snapshots/test_temporal/test_temporal_literals/mysql-date/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  DATE('2023-04-07') AS `datetime.date(2023, 4, 7)`

ibis/backends/tests/snapshots/test_temporal/test_temporal_literals/mysql-time/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKETIME(4, 5, 6.230136) AS `datetime.time(4, 5, 6, 230136)`

ibis/backends/tests/snapshots/test_temporal/test_temporal_literals/mysql-timestamp/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  TIMESTAMP('2023-04-07T04:05:06.230136') AS `datetime.datetime(2023, 4, 7, 4, 5, 6, 230136)`

ibis/backends/tests/snapshots/test_temporal/test_time_literals/0-mysql/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKETIME(4, 5, 6.0) AS `datetime.time(4, 5, 6)`

ibis/backends/tests/snapshots/test_temporal/test_time_literals/234567-mysql/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKETIME(4, 5, 6.234567) AS `datetime.time(4, 5, 6, 234567)`

ibis/backends/tests/snapshots/test_temporal/test_time_literals/mysql/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKETIME(4, 5, 6.230136) AS `datetime.time(4, 5, 6, 230136)`