Re: Re: ODBC isolationi level SQL_TXN_SERIALIZABLE -> "08001 Already connected."

Hello, Inoue-san
cc: Hong

I confirmed the attached patch fixes this bug.  Could you review and commit it?

I corrected relevant SQLSTATE values, referring to the following page for ODBC v2.

SQLSTATE Mappings
https://msdn.microsoft.com/en-us/library/ms712451(v=vs.85).aspx

Regards
Takayuki Tsunakawa