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#   http://www.apache.org/licenses/LICENSE-2.0
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"""Common data types used throughout the DataFusion project."""

from ._internal import common as common_internal
from enum import Enum

# TODO these should all have proper wrapper classes

DFSchema = common_internal.DFSchema
DataType = common_internal.DataType
DataTypeMap = common_internal.DataTypeMap
PythonType = common_internal.PythonType
RexType = common_internal.RexType
SqlFunction = common_internal.SqlFunction
SqlSchema = common_internal.SqlSchema
SqlStatistics = common_internal.SqlStatistics
SqlTable = common_internal.SqlTable
SqlType = common_internal.SqlType
SqlView = common_internal.SqlView

__all__ = [
    "DFSchema",
    "DataType",
    "DataTypeMap",
    "RexType",
    "PythonType",
    "SqlType",
    "NullTreatment",
    "SqlTable",
    "SqlSchema",
    "SqlView",
    "SqlStatistics",
    "SqlFunction",
]


class NullTreatment(Enum):
    """Describe how null values are to be treated by functions.

    This is used primarily by aggregate and window functions. It can be set on
    these functions using the builder approach described in
    ref:`_window_functions` and ref:`_aggregation` in the online documentation.

    """

    RESPECT_NULLS = common_internal.NullTreatment.RESPECT_NULLS
    IGNORE_NULLS = common_internal.NullTreatment.IGNORE_NULLS