Struct postgres::stmt::CopyOutReader
[−]
[src]
pub struct CopyOutReader<'a> { // some fields omitted }
A Read
er for data from COPY TO STDOUT
queries.
Warning
The underlying connection may not be used while a CopyOutReader
exists.
Any attempt to do so will panic.
Methods
impl<'a> CopyOutReader<'a>
[src]
fn format(&self) -> Format
Returns the format of the overall data.
fn column_formats(&self) -> &[Format]
Returns the format of the individual columns.
fn session_info<'b>(&'b self) -> SessionInfo<'b>
Returns session info for the associated connection.
fn finish(self) -> Result<()>
Consumes the CopyOutReader
, throwing away any unread data.
Functionally equivalent to CopyOutReader
's Drop
implementation,
except that it returns any error encountered to the caller.
Trait Implementations
impl<'a> Drop for CopyOutReader<'a>
[src]
impl<'a> Read for CopyOutReader<'a>
[src]
fn read(&mut self, buf: &mut [u8]) -> Result<usize>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0
Read all bytes until EOF in this source, placing them into buf
. Read more
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0
Read all bytes until EOF in this source, placing them into buf
. Read more
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0
Read the exact number of bytes required to fill buf
. Read more
fn by_ref(&mut self) -> &mut Self
1.0.0
Creates a "by reference" adaptor for this instance of Read
. Read more
fn bytes(self) -> Bytes<Self>
1.0.0
Transforms this Read
instance to an Iterator
over its bytes. Read more
fn chars(self) -> Chars<Self>
io
): the semantics of a partial read/write of where errors happen is currently unclear and may change
Transforms this Read
instance to an Iterator
over char
s. Read more
fn chain<R>(self, next: R) -> Chain<Self, R> where R: Read
1.0.0
Creates an adaptor which will chain this stream with another. Read more
fn take(self, limit: u64) -> Take<Self>
1.0.0
Creates an adaptor which will read at most limit
bytes from it. Read more
impl<'a> BufRead for CopyOutReader<'a>
[src]
fn fill_buf(&mut self) -> Result<&[u8]>
Fills the internal buffer of this object, returning the buffer contents. Read more
fn consume(&mut self, amt: usize)
Tells this buffer that amt
bytes have been consumed from the buffer, so they should no longer be returned in calls to read
. Read more
fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0
Read all bytes into buf
until the delimiter byte
is reached. Read more
fn read_line(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0
Read all bytes until a newline (the 0xA byte) is reached, and append them to the provided buffer. Read more
fn split(self, byte: u8) -> Split<Self>
1.0.0
Returns an iterator over the contents of this reader split on the byte byte
. Read more
fn lines(self) -> Lines<Self>
1.0.0
Returns an iterator over the lines of this reader. Read more