GetFieldAsString() does not return entire string

[rhaden]

The GetFieldAsString?() method seems to truncate the returned string to 75 characters or fewer. This behavior is at least present in the C# bindings for GDAL - I'm not sure if it's present in the native library.

I've attached test data which illustrates the issue. It's a Microsoft Access database with ESRI Personal Geodatabase formatting. There's an additional table called BinaryRecords? which contains two fields: an ID field and a field called BinaryData? which is of type "OLE Object" (Access' equivalent to a BLOB). The table contains three records, each of which has a 1024-byte-long value in the BinaryData? column.

[rouault]

GetFieldAsString?() in the native library only returns a maximum of 80 characters for non-string fields. So this is expected. I'm closing this ticket since #4457 asks for GetFieldAsBinary?() which is the right thing to do here.