op问这个问题已经很久了，但是这里有一段代码可以将pyodbc错误消息解析成可以使用的漂亮Python异常。这也意味着要扩展，我没有处理所有可能的 sqlserver 错误代码。
import re
from enum import Enum, IntEnum, unique
class PyODBCError(Exception):
"""
Handle errors for PyODBC. Offers a error message parser
to apply specific logic depending on the error raise
ODBC error identifier: 23000
pyodbc_error_message (str) -- message raised by PyODBC
Example:
[23000] [Microsoft][ODBC Driver 17 for SQL Server][SQL Server] \
Cannot insert explicit value for identity column in table \
'building' when IDENTITY_INSERT is set to OFF.
(544) (SQLExecDirectW) \
"""
error_pattern = re.compile(
r"\[(?P<error_id>.*?)\] \[(?P<operator>.*?)\]\[(?P<driver>.*?)\]\[(?P<database_type>.*?)\](?P<error_message>.+?(?= \()) \((?P<sql_server_error_id>\d*?)\) \(SQLExecDirectW\)"
)
sql_error_code_pattern = re.compile(r"\((?P<sql_server_error_code>\d*?)\) \(SQLExecDirectW\)")
column_pattern = re.compile(r"column \'(?P<column_name>.+?)\'")
table_pattern = re.compile(r"table \'(?P<table_name>.+?)\'")
pyodbc_error_code = 'HY000'
def __init__(self, pyodbc_error_message: str) -> None:
self._parse_error_message(pyodbc_error_message)
def __str__(self) -> str:
return self.error_message
def _parse_error_message(self, pyodbc_error_message: str) -> None:
m = re.match(self.error_pattern, pyodbc_error_message)
self.operator = m.group('operator')
self.error_id = m.group('error_id')
self.driver = m.group('driver')
self.database_type = m.group('database_type')
self.error_message = m.group('error_message')
self.sql_server_error_id = m.group('sql_server_error_id')
@classmethod
def get_message(cls, pyodbc_exception: Exception) -> str:
if pyodbc_exception.args[1] == cls.pyodbc_error_code:
return pyodbc_exception.args[0]
else:
return pyodbc_exception.args[1]
@classmethod
def get_pyodbc_code(cls, pyodbc_exception: Exception) -> str:
if pyodbc_exception.args[1] == cls.pyodbc_error_code:
return pyodbc_exception.args[1]
else:
return pyodbc_exception.args[0]
@staticmethod
def get_exception(error_code: int):
return {
515: IdentityInsertNull,
544: IdentityInsertSetToOff,
2627: PrimaryKeyViolation,
8114: FailedTypeConversion,
102: IncorrectSyntax,
32: InvalidNumberParametersSupplied
}.get(error_code, DefaultException)
@classmethod
def get_sql_server_error_code(cls, pyodbc_code: str, message: str) -> int:
"""
Parses error message raised by PyODBC and return SQL Server Error Code
Looks for the following pattern:
(544) (SQLExecDirectW) -> 544
Args:
pyodbc_error_message (str): Error string raised by PyODBC
Returns:
(int) - SQL Server Error Code
"""
if pyodbc_code == cls.pyodbc_error_code:
return 32
else:
m = re.search(cls.sql_error_code_pattern, message)
if m:
return int(m.group('sql_server_error_code'))
else:
raise ValueError(f"Error raised is not from SQL Server: {message}")
@classmethod
def build_pyodbc_exception(cls, pyodbc_exception: Exception):
pyodbc_code = cls.get_pyodbc_code(pyodbc_exception)
error_message = cls.get_message(pyodbc_exception)
error_code = cls.get_sql_server_error_code(pyodbc_code, error_message)
exception = cls.get_exception(error_code)
raise exception(error_message)
class IdentityInsertNull(PyODBCError):
"""
Handle specific PyODBC error related to Null Value Inserted on Identity Column
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
m = re.search(self.table_pattern, self.error_message)
self.table_name = m.group('table_name')
m = re.search(self.column_pattern, self.error_message)
self.column_name = m.group('column_name')
class IdentityInsertSetToOff(PyODBCError):
"""
Handle specific PyODBC error related to Identity Not Set to On/Off
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
m = re.search(self.table_pattern, self.error_message)
self.table_name = m.group('table_name')
class FailedTypeConversion(PyODBCError):
"""
Handle specific PyODBC error related to data type conversion
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
class PrimaryKeyViolation(PyODBCError):
"""
Handle specific PyODBC error related to Primary Key Violation
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
class IncorrectSyntax(PyODBCError):
"""
Handle specific PyODBC error related to incorrect syntax in query
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
class DefaultException(PyODBCError):
"""
Handle default PyODBC errors
"""
def __init__(self, pyodbc_error_message):
super().__init__(pyodbc_error_message)
def __str__(self) -> str:
return f"{self.sql_server_error_id} - {self.error_message}"
class InvalidNumberParametersSupplied(Exception):
def __init__(self, error_message) -> None:
self.message = error_message
def __str__(self) -> str:
return self.message