Struct odbc_api::buffers::OptFixedSizedColumn

pub struct OptFixedSizedColumn<T> { /* fields omitted */ }

Column buffer for fixed sized type, also binding an indicator buffer to handle NULL.

Implementations

impl<T> OptFixedSizedColumn<T> where
    T: Default + Clone, 

pub fn new(batch_size: usize) -> Self

pub unsafe fn value_at(&self, row_index: usize) -> Option<&T>

Access the value at a specific row index.

Safety

The buffer size is not automatically adjusted to the size of the last row set. It is the callers responsibility to ensure, a value has been written to the indexed position by Cursor::fetch using the value bound to the cursor with Cursor::set_num_result_rows_fetched.

pub fn values(&self) -> &[T]

pub fn indicators(&self) -> &[isize]

Trait Implementations

impl<T> CData for OptFixedSizedColumn<T> where
    T: FixedSizedCType, 

fn cdata_type(&self) -> CDataType

The identifier of the C data type of the value buffer. When it is retrieving data from the data source with fetch, the driver converts the data to this type. When it sends data to the source, the driver converts the data from this type.

fn indicator_ptr(&self) -> *const isize

Indicates the length of variable sized types. May be zero for fixed sized types.

fn value_ptr(&self) -> *const c_void

Pointer to a value corresponding to the one described by cdata_type.

fn buffer_length(&self) -> isize

Maximum length of the type. It is required to index values in bound buffers, if more than one parameter is bound. Can be set to zero for types not bound as parameter arrays, i.e. CStr.

impl<T> CDataMut for OptFixedSizedColumn<T> where
    T: FixedSizedCType, 

fn mut_indicator_ptr(&mut self) -> *mut isize

Indicates the length of variable sized types. May be zero for fixed sized types.

fn mut_value_ptr(&mut self) -> *mut c_void

Pointer to a value corresponding to the one described by cdata_type.