iotdb-client/client-py/tests/integration/test_dataframe.py

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from iotdb.Session import Session
from .iotdb_container import IoTDBContainer

from numpy.testing import assert_array_equal


def test_simple_query():
    with IoTDBContainer("iotdb:dev") as db:
        db: IoTDBContainer
        session = Session(db.get_container_host_ip(), db.get_exposed_port(6667))
        session.open(False)
        session.execute_non_query_statement("CREATE DATABASE root.device0")

        # Write data
        session.insert_str_record("root.device0", 123, "pressure", "15.0")

        # Read
        session_data_set = session.execute_query_statement("SELECT * FROM root.device0")
        df = session_data_set.todf()

        session.close()

    assert list(df.columns) == ["Time", "root.device0.pressure"]
    assert_array_equal(df.values, [[123.0, 15.0]])


def test_stream_query():
    with IoTDBContainer("iotdb:dev") as db:
        db: IoTDBContainer
        session = Session(
            db.get_container_host_ip(), db.get_exposed_port(6667), fetch_size=1
        )
        session.open(False)
        session.execute_non_query_statement("CREATE DATABASE root.device0")

        # Write data
        session.insert_str_record("root.device0", 123, "pressure", "15.0")
        session.insert_str_record("root.device0", 124, "pressure", "15.0")
        session.insert_str_record("root.device0", 125, "pressure", "15.0")

        # Read
        session_data_set = session.execute_query_statement("SELECT * FROM root.device0")
        index = 0
        while session_data_set.has_next_df():
            df = session_data_set.next_df()
            assert list(df.columns) == ["Time", "root.device0.pressure"]
            assert_array_equal(df.values, [[123.0 + index, 15.0]])
            index += 1
        session.close()
        assert index == 3


def test_stream_query_with_illegal_fetch_size():
    with IoTDBContainer("iotdb:dev") as db:
        db: IoTDBContainer
        session = Session(
            db.get_container_host_ip(), db.get_exposed_port(6667), fetch_size=-1
        )
        session.open(False)
        session.execute_non_query_statement("CREATE DATABASE root.device0")

        # Write data
        session.insert_str_record("root.device0", 123, "pressure", "15.0")
        session.insert_str_record("root.device0", 124, "pressure", "15.0")
        session.insert_str_record("root.device0", 125, "pressure", "15.0")

        # Read
        session_data_set = session.execute_query_statement("SELECT * FROM root.device0")

        while session_data_set.has_next_df():
            df = session_data_set.next_df()
            assert list(df.columns) == ["Time", "root.device0.pressure"]
            assert_array_equal(df.values, [[123.0, 15.0], [124.0, 15.0], [125.0, 15.0]])
        session.close()


def test_non_time_query():
    with IoTDBContainer("iotdb:dev") as db:
        db: IoTDBContainer
        session = Session(db.get_container_host_ip(), db.get_exposed_port(6667))
        session.open(False)
        session.execute_non_query_statement("CREATE DATABASE root.device0")

        # Write data
        session.insert_str_record("root.device0", 123, "pressure", "15.0")

        # Read
        session_data_set = session.execute_query_statement(
            "SHOW TIMESERIES root.device0.*"
        )
        df = session_data_set.todf()

        session.close()

    assert list(df.columns) == [
        "Timeseries",
        "Alias",
        "Database",
        "DataType",
        "Encoding",
        "Compression",
        "Tags",
        "Attributes",
        "Deadband",
        "DeadbandParameters",
        "ViewType",
    ]
    assert_array_equal(
        df.values,
        [
            [
                "root.device0.pressure",
                None,
                "root.device0",
                "DOUBLE",
                "GORILLA",
                "LZ4",
                None,
                None,
                None,
                None,
                "BASE",
            ]
        ],
    )