After downgrading from Connector/ODBC 5.1 to Connector/ODBC 3.51, unrecognized names for connection string parameters caused warning messages about unknown options. (Bug #13647492)

SQLFetchhas to return error if indicator pointer isNULLforNULLvalue. (Bug #13542600)

In some cases, aTIMESTAMPfield could be described asSQL_NO_NULLS. (Bug #13532987)

A failure on one statement causes another statement to fail. (Bug #13097201, Bug #62657)

Connector/ODBC manually added aLIMITclause to the end of certain SQL statements, causing errors for statements that contained code that should be positioned after theLIMITclause. (Bug #49726)

Describing a view or table causedSQLPrepareto prefetch table data. For large tables this created an intolerable performance hit. (Bug #46411)