CS_BULK_LOGIN describes whether or not a connection can perform bulk copy operations into a database. The default of CS_FALSE prohibits bulk copy operations.
Applications that perform bulk copy operations on a connection must set the CS_BULK_LOGIN connection property to CS_TRUE before calling ct_connect to open the connection.
Applications that allow users to make ad hoc queries may want to avoid setting this property to CS_TRUE, to keep users from initiating a bulk copy sequence through SQL commands. Once a bulk copy sequence has been started, it cannot be stopped with an ordinary SQL command. Applications perform bulk copy operations using Bulk-Library calls. Bulk-Library is described in the Open Client and Open Server Common Libraries Reference Manual.