Struct parquet_format_async_temp::NullType [−][src]
pub struct NullType {}
Expand description
Logical type to annotate a column that is always null.
Sometimes when discovering the schema of existing data, values are always null and the physical type can’t be determined. This annotation signals the case where the physical type was guessed from all null values.
Implementations
pub async fn stream_from_in_protocol(
i_prot: &mut dyn TInputStreamProtocol
) -> Result<NullType>
pub async fn write_to_out_stream_protocol(
&self,
o_prot: &mut dyn TOutputStreamProtocol
) -> Result<usize>
Trait Implementations
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Auto Trait Implementations
impl RefUnwindSafe for NullType
impl UnwindSafe for NullType
Blanket Implementations
Mutably borrows from an owned value. Read more