Source code for tests.system.ydb.example_ydb

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from __future__ import annotations

import datetime
import os

import ydb

from airflow import DAG
from airflow.decorators import task
from airflow.providers.ydb.hooks.ydb import YDBHook
from airflow.providers.ydb.operators.ydb import YDBExecuteQueryOperator, YDBScanQueryOperator

# [START ydb_operator_howto_guide]


# create_pet_table, populate_pet_table, get_all_pets, and get_birth_date are examples of tasks created by
# instantiating the YDB Operator

[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
[docs]DAG_ID = "ydb_operator_dag"
@task
[docs]def populate_pet_table_via_bulk_upsert(): hook = YDBHook() column_types = ( ydb.BulkUpsertColumns() .add_column("pet_id", ydb.OptionalType(ydb.PrimitiveType.Int32)) .add_column("name", ydb.PrimitiveType.Utf8) .add_column("pet_type", ydb.PrimitiveType.Utf8) .add_column("birth_date", ydb.PrimitiveType.Utf8) .add_column("owner", ydb.PrimitiveType.Utf8) ) rows = [ {"pet_id": 3, "name": "Lester", "pet_type": "Hamster", "birth_date": "2020-06-23", "owner": "Lily"}, {"pet_id": 4, "name": "Quincy", "pet_type": "Parrot", "birth_date": "2013-08-11", "owner": "Anne"}, ] hook.bulk_upsert("pet", rows=rows, column_types=column_types)
with DAG( dag_id=DAG_ID, start_date=datetime.datetime(2020, 2, 2), schedule="@once", catchup=False, ) as dag: # [START ydb_operator_howto_guide_create_pet_table]
[docs] create_pet_table = YDBExecuteQueryOperator( task_id="create_pet_table", sql=""" CREATE TABLE pet ( pet_id INT, name TEXT NOT NULL, pet_type TEXT NOT NULL, birth_date TEXT NOT NULL, owner TEXT NOT NULL, PRIMARY KEY (pet_id) ); """, is_ddl=True, # must be specified for DDL queries )
# [END ydb_operator_howto_guide_create_pet_table] # [START ydb_operator_howto_guide_populate_pet_table] populate_pet_table = YDBExecuteQueryOperator( task_id="populate_pet_table", sql=""" UPSERT INTO pet (pet_id, name, pet_type, birth_date, owner) VALUES (1, 'Max', 'Dog', '2018-07-05', 'Jane'); UPSERT INTO pet (pet_id, name, pet_type, birth_date, owner) VALUES (2, 'Susie', 'Cat', '2019-05-01', 'Phil'); """, ) # [END ydb_operator_howto_guide_populate_pet_table] # [START ydb_operator_howto_guide_get_all_pets] get_all_pets = YDBExecuteQueryOperator(task_id="get_all_pets", sql="SELECT * FROM pet;") # [END ydb_operator_howto_guide_get_all_pets] # [START ydb_operator_howto_guide_get_birth_date] get_birth_date = YDBExecuteQueryOperator( task_id="get_birth_date", sql="SELECT * FROM pet WHERE birth_date BETWEEN '{{params.begin_date}}' AND '{{params.end_date}}'", params={"begin_date": "2020-01-01", "end_date": "2020-12-31"}, ) # [END ydb_operator_howto_guide_get_birth_date] # [START ydb_operator_howto_guide_get_birth_date_scan] get_birth_date_scan = YDBScanQueryOperator( task_id="get_birth_date_scan", sql="SELECT * FROM pet WHERE birth_date BETWEEN '{{params.begin_date}}' AND '{{params.end_date}}'", params={"begin_date": "2020-01-01", "end_date": "2020-12-31"}, ) # [END ydb_operator_howto_guide_get_birth_date_scan] ( create_pet_table >> populate_pet_table >> populate_pet_table_via_bulk_upsert() >> get_all_pets >> get_birth_date >> get_birth_date_scan ) # [END ydb_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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