Struct Bit

pub struct Bit(pub u8);

New type wrapping u8 and binding as SQL_BIT.

If rust would guarantee the representation of bool to be an u8, bool would be the obvious choice instead. Alas it is not and someday on some platform bool might be something else than a u8 so let’s use this new type instead.

Tuple Fields

0: u8

Implementations

impl Bit

pub fn from_bool(boolean: bool) -> Self

Maps true to 1 and false to 0.

use odbc_api::Bit;

assert_eq!(Bit(0), Bit::from_bool(false));
assert_eq!(Bit(1), Bit::from_bool(true));

pub fn as_bool(self) -> bool

Maps 1 to true, 0 to false. Panics if Bit should be invalid (not 0 or 1).

Trait Implementations

impl CData for Bit

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. Used to determine the size or existence of input parameters.

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 in bytes (not characters). 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 CDataMut for Bit

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.

impl CElement for Bit

fn assert_completness(&self)

Fixed sized types are always complete

impl Clone for Bit

fn clone(&self) -> Bit

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Bit

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

Formats the value using the given formatter.

impl Default for Bit

fn default() -> Bit

Returns the “default value” for a type.

impl FetchRowMember for Bit

fn indicator(&self) -> Option<Indicator>

Indicator for variable sized or nullable types, None for fixed sized types.

fn find_truncation(&self, buffer_index: usize) -> Option<TruncationInfo>

Some if the indicator indicates truncation. Always None for fixed sized types.

unsafe fn bind_to_col( &mut self, col_index: u16, cursor: &mut StatementRef<'_>, ) -> Result<(), Error>

Bind row element to column. Only called for the first row in a row wise buffer.

impl HasDataType for Bit

fn data_type(&self) -> DataType

The SQL data as which the parameter is bound to ODBC.

impl Item for Bit

fn buffer_desc(nullable: bool) -> BufferDesc

Can be used to instantiate a super::ColumnarBuffer. This is useful to allocate the correct buffers in generic code.

fn as_slice(variant: AnySlice<'_>) -> Option<&[Self]>

Extract the array type from an AnySlice.

fn as_nullable_slice(variant: AnySlice<'_>) -> Option<NullableSlice<'_, Self>>

Extract the typed nullable buffer from an AnySlice.

fn as_slice_mut(variant: AnySliceMut<'_>) -> Option<&mut [Self]>

Extract the array type from an AnySliceMut.

fn as_nullable_slice_mut( variant: AnySliceMut<'_>, ) -> Option<NullableSliceMut<'_, Self>>

Extract the typed nullable buffer from an AnySliceMut.

impl Ord for Bit

fn cmp(&self, other: &Bit) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Bit

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Bit

fn partial_cmp(&self, other: &Bit) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Bit

impl Eq for Bit

impl OutputParameter for Bit

impl StructuralPartialEq for Bit