unsigned long odbx_field_length (odbx_result_t* result, unsigned long pos);
DESCRIPTIONodbx_field_length() returns the length of the field value in bytes. The field is part of the current row which was retrieved by the latest call to odbx_row_fetch() and is specified by the column index given by pos.
The result parameter required by this function must be a valid result set returned by odbx_result() and must not has been feed to odbx_result_finish() before.
Valid column indices for the requested column provided via pos start with zero and end with the value returned by odbx_column_count() minus one.