Crash when using connection pooling with a unicode driver
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#31 Crash when using connection pooling with a unicode driver
When using a unicode-only driver (such as the oracle instant client ODBC driver), if connection pooling is enabled, crashes occur in at least SQLPrepare() and possibly other places.
It seems that the connection.unicode_driver flag isn't being saved to the pool, resulting in SQLPrepare() calling the null pointer connection.functions[55].func instead of connection.functions[55].funcW when called on a connection that was retrieved from the pool.
The attached patch stores the unicode_driver flag to the pool, and retrieved (along with the iconv function pointers) when taking a connection from the pool.
Fixes a crash bug when using connection pooling with a unicode-only driver