Information about the GuessTheColDef connection string attribute of the ODBC Driver for Oracle

This article contains information about the GuessTheColDef connection string attribute of the Microsoft ODBC driver for Oracle.

The ODBC driver for Oracle contains a connection string attribute that is named GuessTheColDef. The GuessTheColDef attribute specifies whether the ODBC driver must return a non-zero value or a zero value for the cbColDef argument of the SQLDescribeCol function. The GuessTheColDef attribute applies only to columns where there is no Oracle-defined scale such as computed numeric columns and columns that are defined as NUMBER data type without a precision or scale. A call to the SQLDescribeCol function returns 130 for the precision when Oracle does not provide that information.

Note The GuessTheColDef attribute functions the same as the SQLDescribeCol always returns a value for precision option. To turn on this option, click to select SQLDescribeCol always returns a value for precision in the Data Sources dialog box.

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