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# Copyright (c) 2020-2024 Open Text.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
CopyError message
In the copy-local protocol, the frontend can terminate the cycle by sending a
CopyError message, which will cause the COPY SQL statement to fail with an error.
"""
from __future__ import print_function, division, absolute_import, annotations
from struct import pack
from ..message import BulkFrontendMessage
class CopyError(BulkFrontendMessage):
message_id = b'e'
def __init__(self, error_msg, stack_trace=None):
BulkFrontendMessage.__init__(self)
self.error_msg = error_msg.encode('utf-8')
self.file_name = stack_trace[0].encode('utf-8') if stack_trace else b''
self.line_number = stack_trace[1] if stack_trace else 0
self.func_name = stack_trace[2].encode('utf-8') if stack_trace else b''
def read_bytes(self):
bytes_ = pack('!{0}sxI{1}sx{2}sx'.format(
len(self.file_name), len(self.func_name), len(self.error_msg)),
self.file_name, self.line_number, self.func_name, self.error_msg)
return bytes_
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