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from typing import Any, Dict |
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from pystratum_common.helper.DataTypeHelper import DataTypeHelper |
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class MsSqlDataTypeHelper(DataTypeHelper): |
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""" |
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Utility class for deriving information based on a SQL Server data type. |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def column_type_to_python_type(self, data_type_info: Dict[str, Any]) -> str: |
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""" |
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Returns the corresponding Python data type of a SQL Server data type. |
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:param dict data_type_info: The SQL Server data type metadata. |
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:rtype: str |
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""" |
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if data_type_info['data_type'] in ['bigint', |
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'bit', |
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'int', |
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'smallint', |
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'tinyint']: |
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return 'int' |
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if data_type_info['data_type'] == 'decimal': |
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return 'int' if data_type_info['numeric_scale'] == 0 else 'float' |
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if data_type_info['data_type'] in ['float', |
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'real']: |
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return 'float' |
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if data_type_info['data_type'] in ['char', |
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'date', |
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'datetime', |
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'datetime2', |
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'datetimeoffset', |
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'money', |
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'nchar', |
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'ntext', |
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'nvarchar', |
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'smalldatetime', |
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'smallmoney', |
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'text', |
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'time', |
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'timestamp', |
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'tinytext', |
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'varchar', |
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'xml']: |
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return 'str' |
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if data_type_info['data_type'] in ['binary', |
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'image', |
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'varbinary']: |
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return 'bytes' |
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raise RuntimeError('Unknown data type {0}'.format(data_type_info['data_type'])) |
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# ------------------------------------------------------------------------------------------------------------------ |
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def column_type_to_python_type_hint(self, data_type_info: Dict[str, Any]) -> str: |
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""" |
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Returns the corresponding Python data type hinting of a SQL Server data type. |
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:param dict data_type_info: The PostgreSQL data type metadata. |
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:rtype: str |
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""" |
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if data_type_info['data_type'] in ['bigint', |
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'bit', |
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'int', |
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'smallint', |
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'tinyint']: |
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return 'Optional[int]' |
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if data_type_info['data_type'] == 'decimal': |
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return 'Optional[int]' if data_type_info['numeric_scale'] == 0 else 'Optional[float]' |
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if data_type_info['data_type'] in ['float', |
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'real']: |
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return 'Optional[float]' |
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if data_type_info['data_type'] in ['char', |
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'date', |
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'datetime', |
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'datetime2', |
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'datetimeoffset', |
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'money', |
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'nchar', |
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'ntext', |
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'nvarchar', |
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'smalldatetime', |
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'smallmoney', |
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'text', |
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'time', |
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'timestamp', |
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'tinytext', |
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'varchar', |
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'xml']: |
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return 'Optional[str]' |
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if data_type_info['data_type'] in ['binary', |
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'image', |
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'varbinary']: |
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return 'Optional[bytes]' |
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raise RuntimeError('Unknown data type {0}'.format(data_type_info['data_type'])) |
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# ---------------------------------------------------------------------------------------------------------------------- |
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DatabaseStratum /
py-stratum-mssql
