Add skipif to unit test

tests/unit/sqlalchemy/foo.py

@@ -0,0 +1,28 @@
+from sqlalchemy import Column, Integer, MetaData, String, Table, func, insert, select, try_cast
+from sqlalchemy.schema import CreateTable
+from sqlalchemy.sql import column, table
+
+#from tests.unit.conftest import sqlalchemy_version
+from trino.sqlalchemy.dialect import TrinoDialect
+
+metadata = MetaData()
+table_without_catalog = Table(
+    'table',
+    metadata,
+    Column('id', Integer),
+    Column('name', String),
+)
+table_with_catalog = Table(
+    'table',
+    metadata,
+    Column('id', Integer),
+    schema='default',
+    trino_catalog='other'
+)
+
+def test_try_cast(dialect):
+    statement = select(try_cast(table_without_catalog.c.id,String))
+    query = statement.compile(dialect=dialect)
+    assert str(query) == 'SELECT try_cast("table".id as VARCHAR) AS id \nFROM "table"'
+
+test_try_cast(TrinoDialect())

tests/unit/sqlalchemy/test_compiler.py

@@ -152,6 +152,10 @@ def test_ignore_nulls(dialect, function, element):
            f'SELECT {function}("table".id) OVER (PARTITION BY "table".name) AS window ' \
            f'\nFROM "table"'
 
+@pytest.mark.skipif(
+    sqlalchemy_version() < "2.0",
+    reason="ImportError: cannot import name 'try_cast' from 'sqlalchemy'"
+)
 def test_try_cast(dialect):
     statement = select(try_cast(table_without_catalog.c.id,String))
     query = statement.compile(dialect=dialect)