superset/db_engine_specs/elasticsearch.py

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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# specific language governing permissions and limitations
# under the License.
from datetime import datetime
from typing import Dict, Optional, Type

from superset.db_engine_specs.base import BaseEngineSpec
from superset.db_engine_specs.exceptions import (
    SupersetDBAPIDatabaseError,
    SupersetDBAPIOperationalError,
    SupersetDBAPIProgrammingError,
)
from superset.utils import core as utils


class ElasticSearchEngineSpec(BaseEngineSpec):  # pylint: disable=abstract-method
    engine = "elasticsearch"
    engine_name = "ElasticSearch"
    time_groupby_inline = True
    time_secondary_columns = True
    allows_joins = False
    allows_subqueries = True

    _time_grain_expressions = {
        None: "{col}",
        "PT1S": "HISTOGRAM({col}, INTERVAL 1 SECOND)",
        "PT1M": "HISTOGRAM({col}, INTERVAL 1 MINUTE)",
        "PT1H": "HISTOGRAM({col}, INTERVAL 1 HOUR)",
        "P1D": "HISTOGRAM({col}, INTERVAL 1 DAY)",
        "P1M": "HISTOGRAM({col}, INTERVAL 1 MONTH)",
        "P1Y": "HISTOGRAM({col}, INTERVAL 1 YEAR)",
    }

    type_code_map: Dict[int, str] = {}  # loaded from get_datatype only if needed

    @classmethod
    def get_dbapi_exception_mapping(cls) -> Dict[Type[Exception], Type[Exception]]:
        import es.exceptions as es_exceptions  # pylint: disable=import-error

        return {
            es_exceptions.DatabaseError: SupersetDBAPIDatabaseError,
            es_exceptions.OperationalError: SupersetDBAPIOperationalError,
            es_exceptions.ProgrammingError: SupersetDBAPIProgrammingError,
        }

    @classmethod
    def convert_dttm(cls, target_type: str, dttm: datetime) -> Optional[str]:
        if target_type.upper() == utils.TemporalType.DATETIME:
            return f"""CAST('{dttm.isoformat(timespec="seconds")}' AS DATETIME)"""
        return None