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use crate::protocol::parts::server_error::ServerError;
use byteorder::{LittleEndian, ReadBytesExt};
use std::fmt;
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum ExecutionResult {
RowsAffected(usize),
SuccessNoInfo,
Failure(Option<ServerError>),
}
impl ExecutionResult {
pub(crate) fn parse(count: usize, rdr: &mut dyn std::io::Read) -> std::io::Result<Vec<Self>> {
let mut vec = Vec::<Self>::with_capacity(count);
for _ in 0..count {
match rdr.read_i32::<LittleEndian>()? {
-2 => vec.push(Self::SuccessNoInfo),
-3 => vec.push(Self::Failure(None)),
#[allow(clippy::cast_sign_loss)]
i => vec.push(Self::RowsAffected(i as usize)),
}
}
Ok(vec)
}
pub fn is_failure(&self) -> bool {
matches!(self, Self::Failure(_))
}
pub fn is_rows_affected(&self) -> bool {
matches!(self, Self::RowsAffected(_))
}
}
impl fmt::Display for ExecutionResult {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self {
Self::RowsAffected(count) => writeln!(fmt, "Number of affected rows: {}, ", count)?,
Self::SuccessNoInfo => writeln!(
fmt,
"Command successfully executed but number of affected rows cannot be determined"
)?,
Self::Failure(Some(ref server_error)) => writeln!(
fmt,
"Execution of statement or processing of row has failed with {:?}",
server_error
)?,
Self::Failure(None) => writeln!(
fmt,
"Execution of statement or processing of row has failed"
)?,
}
Ok(())
}
}