Type Definition odbc_api::buffers::ColumnarAnyBuffer

pub type ColumnarAnyBuffer = ColumnarBuffer<AnyColumnBuffer>;

Flexible columnar buffer implementation. Bind this to a cursor to fetch values in bulk, or pass this as a parameter to a statement, to submit many parameters at once.

Implementations

impl ColumnarAnyBuffer

pub fn from_description(
    capacity: usize,
    descs: impl Iterator<Item = BufferDescription>
) -> Self

Allocates a ColumnarBuffer fitting the buffer descriptions.

pub fn try_from_description(
    capacity: usize,
    descs: impl Iterator<Item = BufferDescription>
) -> Result<Self, Error>

Allocates a ColumnarBuffer fitting the buffer descriptions. If not enough memory is available to allocate the buffers this function fails with Error::TooLargeColumnBufferSize. This function is slower than Self::from_description which would just panic if not enough memory is available for allocation.

pub fn from_description_and_indices(
    max_rows: usize,
    description: impl Iterator<Item = (u16, BufferDescription)>
) -> ColumnarBuffer<AnyColumnBuffer>

Allows you to pass the buffer descriptions together with a one based column index referring the column, the buffer is supposed to bind to. This allows you also to ignore columns in a result set, by not binding them at all. There is no restriction on the order of column indices passed, but the function will panic, if the indices are not unique.