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from datetime import datetime

from airflow import DAG
from airflow.models.baseoperator import chain
from import RedshiftSQLOperator
from airflow.utils.trigger_rule import TriggerRule
from import set_env_id

[docs]ENV_ID = set_env_id()
[docs]DAG_ID = 'example_redshift_sql'
with DAG( dag_id=DAG_ID, start_date=datetime(2021, 1, 1), schedule=None, catchup=False, tags=['example'], ) as dag:
[docs] setup__task_create_table = RedshiftSQLOperator( task_id='setup__create_table', sql=""" CREATE TABLE IF NOT EXISTS fruit ( fruit_id INTEGER, name VARCHAR NOT NULL, color VARCHAR NOT NULL ); """,
) setup__task_insert_data = RedshiftSQLOperator( task_id='setup__task_insert_data', sql=[ "INSERT INTO fruit VALUES ( 1, 'Banana', 'Yellow');", "INSERT INTO fruit VALUES ( 2, 'Apple', 'Red');", "INSERT INTO fruit VALUES ( 3, 'Lemon', 'Yellow');", "INSERT INTO fruit VALUES ( 4, 'Grape', 'Purple');", "INSERT INTO fruit VALUES ( 5, 'Pear', 'Green');", "INSERT INTO fruit VALUES ( 6, 'Strawberry', 'Red');", ], ) # [START howto_operator_redshift_sql] task_select_data = RedshiftSQLOperator( task_id='task_get_all_table_data', sql="""CREATE TABLE more_fruit AS SELECT * FROM fruit;""" ) # [END howto_operator_redshift_sql] # [START howto_operator_redshift_sql_with_params] task_select_filtered_data = RedshiftSQLOperator( task_id='task_get_filtered_table_data', sql="""CREATE TABLE filtered_fruit AS SELECT * FROM fruit WHERE color = '{{ params.color }}';""", params={'color': 'Red'}, ) # [END howto_operator_redshift_sql_with_params] teardown__task_drop_table = RedshiftSQLOperator( task_id='teardown__drop_table', sql='DROP TABLE IF EXISTS fruit', trigger_rule=TriggerRule.ALL_DONE, ) chain( setup__task_create_table, setup__task_insert_data, [task_select_data, task_select_filtered_data], teardown__task_drop_table, ) from tests.system.utils.watcher import watcher # This test needs watcher in order to properly mark success/failure # when "tearDown" task with trigger rule is part of the DAG list(dag.tasks) >> watcher() from tests.system.utils import get_test_run # noqa: E402 # Needed to run the example DAG with pytest (see: tests/system/
[docs]test_run = get_test_run(dag)

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