Enum odbc_api::buffers::Indicator

pub enum Indicator {
    Null,
    NoTotal,
    Length(usize),
}

Indicates existence and length of a value.

Variants

Null

Field does not exist

NoTotal

Field exists, but its length had not be reported by the driver.

Length(usize)

Fields exists. Value indicates number of bytes required to store the value. In case of truncated data, this is the true length of the data, before truncation occurred.

Implementations

impl Indicator

pub fn from_isize(indicator: isize) -> Self

Creates an indicator from an isize indicator value returned by ODBC. Users of this crate have likely no need to call this method.

pub fn to_isize(self) -> isize

Creates an indicator value as required by the ODBC C API.

pub fn is_truncated(self, length_in_buffer: usize) -> bool

Does this indicator imply truncation for a value of the given length?

length_in_buffer is specified in bytes without terminating zeroes.

pub fn is_null(self) -> bool

Only true if the indicator is the equivalent to odbc_sys::NULL_DATA, indicating a non-existing value.

pub fn value_len(self) -> Option<usize>

If the indicator is Indicator::Length this is Some.

Trait Implementations

impl Clone for Indicator

fn clone(&self) -> Indicator

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Indicator

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

Formats the value using the given formatter.

impl PartialEq<Indicator> for Indicator

fn eq(&self, other: &Indicator) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Indicator

impl Eq for Indicator

impl StructuralEq for Indicator

impl StructuralPartialEq for Indicator