Struct NCharView

pub struct NCharView {
    pub is_chars: UnsafeCell<bool>,
    /* private fields */
}

Fields

is_chars: UnsafeCell<bool>

TDengine v3 raw block use char for NChar data type, it’s str in v2 websocket block.

Implementations

impl NCharView

pub fn len(&self) -> usize

pub fn is_null(&self, row: usize) -> bool

Check if the value at row index is NULL or not.

pub unsafe fn is_null_unchecked(&self, row: usize) -> bool

Unsafe version for [methods.is_null]

pub unsafe fn nchar_to_utf8(&self)

pub unsafe fn get_inline_str_unchecked(&self, row: usize) -> Option<&InlineStr>

Get UTF-8 string at row.

In this method, InlineNChar will directly converted to InlineStr, which means v3 raw block will be changed in-place.

pub unsafe fn get_length_unchecked(&self, row: usize) -> Option<usize>

pub fn lengths(&self) -> Vec<Option<usize>>

pub fn max_length(&self) -> usize

pub unsafe fn get_unchecked(&self, row: usize) -> Option<&str>

Get UTF-8 string at row.

pub unsafe fn get_value_unchecked(&self, row: usize) -> BorrowedValue<'_>

pub unsafe fn get_raw_value_unchecked( &self, row: usize, ) -> (Ty, u32, *const c_void)

pub fn slice(&self, range: Range<usize>) -> Option<Self>

pub fn iter(&self) -> NCharViewIter<'_>

Iterator for NCharView.

pub fn to_vec(&self) -> Vec<Option<&str>>

Collection to strs.

pub fn from_iter<S: AsRef<str>, T: Into<Option<S>>, I: ExactSizeIterator<Item = T>, V: IntoIterator<Item = T, IntoIter = I>>( iter: V, ) -> Self

pub fn concat(&self, rhs: &Self) -> Self

Trait Implementations

impl Clone for NCharView

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NCharView

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.