Description:
Table A uses CHARACTER SET utf8 COLLATE utf8_bin and Table A has column b of varchar type. When use sql "select b from A" the type of b in python3.4 is bytearray. When execute "select c from A where b = ?" and pass a bytearray as the param, the following error shows:
Traceback (most recent call last):
File "D:\Python34\lib\site-packages\mysql\connector\cursor.py", line 361, in _process_params_dict
conv = quote(conv)
File "D:\Python34\lib\site-packages\mysql\connector\conversion.py", line 173, in quote
return bytearray(b"'" + buf + b"'")
TypeError: can't concat bytes to str
The method _process_params_dict in mysql\connector\cursor.py:
def _process_params_dict(self, params):
"""Process query parameters given as dictionary"""
try:
to_mysql = self._connection.converter.to_mysql
escape = self._connection.converter.escape
quote = self._connection.converter.quote
res = {}
for key, value in list(params.items()):
conv = value
conv = to_mysql(conv)
conv = escape(conv)
conv = quote(conv)
if PY2:
res["%({0})s".format(key)] = conv
else:
res["%({0})s".format(key).encode()] = conv
except Exception as err:
raise errors.ProgrammingError(
"Failed processing pyformat-parameters; %s" % err)
else:
return res
"to_mysql" method in mysql\connector\conversion.py will call _bytearray_to_mysql, which is "return str(value)", so the variable conv is convert to str type. And in quote method in conversion.py, when it call "bytearray(b"'" + buf + b"'")", "TypeError: can't concat bytes to str" will be throw.
How to repeat:
Use python3.4 and mysql-connector of 2.1.3, create a table A of CHARACTER SET utf8 COLLATE utf8_bin , and A has column b of varchar type. where pass a var of type bytearray as param to sql like "select c from A where b =?", the same error will be shown.
Suggested fix:
The method _bytearray_to_mysql should not convert bytearray to str.
Description: Table A uses CHARACTER SET utf8 COLLATE utf8_bin and Table A has column b of varchar type. When use sql "select b from A" the type of b in python3.4 is bytearray. When execute "select c from A where b = ?" and pass a bytearray as the param, the following error shows: Traceback (most recent call last): File "D:\Python34\lib\site-packages\mysql\connector\cursor.py", line 361, in _process_params_dict conv = quote(conv) File "D:\Python34\lib\site-packages\mysql\connector\conversion.py", line 173, in quote return bytearray(b"'" + buf + b"'") TypeError: can't concat bytes to str The method _process_params_dict in mysql\connector\cursor.py: def _process_params_dict(self, params): """Process query parameters given as dictionary""" try: to_mysql = self._connection.converter.to_mysql escape = self._connection.converter.escape quote = self._connection.converter.quote res = {} for key, value in list(params.items()): conv = value conv = to_mysql(conv) conv = escape(conv) conv = quote(conv) if PY2: res["%({0})s".format(key)] = conv else: res["%({0})s".format(key).encode()] = conv except Exception as err: raise errors.ProgrammingError( "Failed processing pyformat-parameters; %s" % err) else: return res "to_mysql" method in mysql\connector\conversion.py will call _bytearray_to_mysql, which is "return str(value)", so the variable conv is convert to str type. And in quote method in conversion.py, when it call "bytearray(b"'" + buf + b"'")", "TypeError: can't concat bytes to str" will be throw. How to repeat: Use python3.4 and mysql-connector of 2.1.3, create a table A of CHARACTER SET utf8 COLLATE utf8_bin , and A has column b of varchar type. where pass a var of type bytearray as param to sql like "select c from A where b =?", the same error will be shown. Suggested fix: The method _bytearray_to_mysql should not convert bytearray to str.