Sqlalchemy multiline query (#1421)

* SQLAlchemyTask should handle multiline strings for query template

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* sqlalchemy supports multi-line query

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* update base sql task

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* remove space

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* fix snowflake tests

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* fix lint

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

* fix test

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

Signed-off-by: Niels Bantilan <niels.bantilan@gmail.com>

flytekit/core/base_sql_task.py

@@ -41,7 +41,7 @@ def __init__(
             task_config=task_config,
             **kwargs,
         )
-        self._query_template = query_template.replace("\n", "\\n").replace("\t", "\\t")
+        self._query_template = re.sub(r"\s+", " ", query_template.replace("\n", " ").replace("\t", " ")).strip()
 
     @property
     def query_template(self) -> str:

flytekit/extras/sqlite3/task.py

@@ -92,14 +92,13 @@ def __init__(
             container_image=container_image or DefaultImages.default_image(),
             executor_type=SQLite3TaskExecutor,
             task_type=self._SQLITE_TASK_TYPE,
+            # Sanitize query by removing the newlines at the end of the query. Keep in mind
+            # that the query can be a multiline string.
             query_template=query_template,
             inputs=inputs,
             outputs=outputs,
             **kwargs,
         )
-        # Sanitize query by removing the newlines at the end of the query. Keep in mind
-        # that the query can be a multiline string.
-        self._query_template = query_template.replace("\n", " ")
 
     @property
     def output_columns(self) -> typing.Optional[typing.List[str]]:

plugins/flytekit-snowflake/tests/test_snowflake.py

@@ -70,7 +70,7 @@ def test_local_exec():
     )
 
     assert len(snowflake_task.interface.inputs) == 1
-    assert snowflake_task.query_template == "select 1\\n"
+    assert snowflake_task.query_template == "select 1"
     assert len(snowflake_task.interface.outputs) == 1
 
     # will not run locally
@@ -86,4 +86,4 @@ def test_sql_template():
          custom where column = 1""",
         output_schema_type=FlyteSchema,
     )
-    assert snowflake_task.query_template == "select 1 from\\t\\n         custom where column = 1"
+    assert snowflake_task.query_template == "select 1 from custom where column = 1"

plugins/flytekit-sqlalchemy/tests/test_task.py

@@ -70,7 +70,23 @@ def test_task_schema(sql_server):
     assert df is not None
 
 
-def test_workflow(sql_server):
+@pytest.mark.parametrize(
+    "query_template",
+    [
+        "select * from tracks limit {{.inputs.limit}}",
+        """
+        select * from tracks
+        limit {{.inputs.limit}}
+        """,
+        """select * from tracks
+        limit {{.inputs.limit}}
+        """,
+        """
+        select * from tracks
+        limit {{.inputs.limit}}""",
+    ],
+)
+def test_workflow(sql_server, query_template):
     @task
     def my_task(df: pandas.DataFrame) -> int:
         return len(df[df.columns[0]])
@@ -84,7 +100,7 @@ def my_task(df: pandas.DataFrame) -> int:
 
     sql_task = SQLAlchemyTask(
         "test",
-        query_template="select * from tracks limit {{.inputs.limit}}",
+        query_template=query_template,
         inputs=kwtypes(limit=int),
         task_config=SQLAlchemyConfig(uri=sql_server),
     )

tests/flytekit/unit/extras/sqlite3/test_task.py

@@ -119,14 +119,14 @@ def test_task_serialization():
 select *
 from tracks
 limit {{.inputs.limit}}""",
-            " select * from tracks limit {{.inputs.limit}}",
+            "select * from tracks limit {{.inputs.limit}}",
         ),
         (
             """ \
 select * \
 from tracks \
 limit {{.inputs.limit}}""",
-            " select * from tracks limit {{.inputs.limit}}",
+            "select * from tracks limit {{.inputs.limit}}",
         ),
         ("select * from abc", "select * from abc"),
     ],