Source code for tests.system.teradata.example_ssl_teradata

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"""
Example Airflow DAG to show usage of TeradataOperator with SSL teradata connection.

This DAG assumes Airflow Connection with connection id `teradata_ssl_default` already exists in locally. It
shows how to use create, update, delete and select teradata statements with TeradataOperator as tasks in
airflow dags using TeradataStoredProcedureOperator.
"""

from __future__ import annotations

import datetime
import os

import pytest

from airflow import DAG

try:
    from airflow.providers.teradata.operators.teradata import TeradataOperator
except ImportError:
    pytest.skip("TERADATA provider not available", allow_module_level=True)

# [START teradata_operator_howto_guide]


# create_table_teradata, insert_teradata_task, create_table_teradata_from_external_file,
# populate_user_table get_all_countries, get_all_description, get_countries_from_continent,
# drop_table_teradata_task, drop_users_table_teradata_task are examples of tasks created by instantiating
# the Teradata Operator

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]DAG_ID = "example_ssl_teradata"
[docs]CONN_ID = "teradata_ssl_default"
with DAG( dag_id=DAG_ID, start_date=datetime.datetime(2020, 2, 2), schedule="@once", catchup=False, default_args={"teradata_conn_id": CONN_ID}, ) as dag: # [START teradata_operator_howto_guide_create_country_table]
[docs] create_country_table = TeradataOperator( task_id="create_country_table", sql=r""" CREATE TABLE SSL_Country ( country_id INTEGER, name CHAR(25), continent CHAR(25) ); """, trigger_rule="all_done", )
# [END teradata_operator_howto_guide_create_country_table] # [START teradata_operator_howto_guide_populate_country_table] populate_country_table = TeradataOperator( task_id="populate_country_table", sql=r""" INSERT INTO SSL_Country VALUES ( 1, 'India', 'Asia'); INSERT INTO SSL_Country VALUES ( 2, 'Germany', 'Europe'); INSERT INTO SSL_Country VALUES ( 3, 'Argentina', 'South America'); INSERT INTO SSL_Country VALUES ( 4, 'Ghana', 'Africa'); """, ) # [END teradata_operator_howto_guide_populate_country_table] # [START teradata_operator_howto_guide_create_users_table_from_external_file] create_users_table_from_external_file = TeradataOperator( task_id="create_users_table_from_external_file", sql="create_ssl_table.sql", dag=dag, ) # [END teradata_operator_howto_guide_create_users_table_from_external_file] # [START teradata_operator_howto_guide_get_all_countries] get_all_countries = TeradataOperator( task_id="get_all_countries", sql=r"SELECT * FROM SSL_Country;", ) # [END teradata_operator_howto_guide_get_all_countries] # [START teradata_operator_howto_guide_params_passing_get_query] get_countries_from_continent = TeradataOperator( task_id="get_countries_from_continent", sql=r"SELECT * FROM SSL_Country where {{ params.column }}='{{ params.value }}';", params={"column": "continent", "value": "Asia"}, ) # [END teradata_operator_howto_guide_params_passing_get_query] # [START teradata_operator_howto_guide_drop_country_table] drop_country_table = TeradataOperator( task_id="drop_country_table", sql=r"DROP TABLE SSL_Country;", dag=dag ) # [END teradata_operator_howto_guide_drop_country_table] # [START teradata_operator_howto_guide_drop_users_table] drop_users_table = TeradataOperator(task_id="drop_users_table", sql=r"DROP TABLE SSL_Users;", dag=dag) # [END teradata_operator_howto_guide_drop_users_table] ( create_country_table >> populate_country_table >> create_users_table_from_external_file >> get_all_countries >> get_countries_from_continent >> drop_country_table >> drop_users_table ) # [END teradata_operator_howto_guide] from tests_common.test_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_common.test_utils.system_tests import get_test_run # noqa: E402 # Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
[docs]test_run = get_test_run(dag)

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