Discussion of open issues, suggestions and bugs regarding ADO.NET provider for Oracle
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OracleDbType.VarChar corresponds to Oracle's VARCHAR2 datatype maximum size of which is 4000 bytes. If you need to store large amount of data, please take a look at the OracleDbType.Clob and OracleDbType.Long datatypes. For more information, please refer to http://www.devart.com/dotconnect/oracle/docs, the Index tab, OracleDbType Enumeration.