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use {
crate::result::Result,
serde::Serialize,
sqlparser::ast::{ObjectName, TableAlias, TableFactor},
std::fmt::Debug,
thiserror::Error,
};
#[derive(Error, Serialize, Debug, PartialEq)]
pub enum TableError {
#[error("unreachable")]
Unreachable,
#[error("TableFactorNotSupported")]
TableFactorNotSupported,
}
pub struct Table<'a> {
name: &'a String,
alias: Option<&'a String>,
}
impl<'a> Table<'a> {
pub fn new(table_factor: &'a TableFactor) -> Result<Self> {
match table_factor {
TableFactor::Table { name, alias, .. } => {
let name = get_name(name)?;
let alias = alias.as_ref().map(|TableAlias { name, .. }| &name.value);
Ok(Self { name, alias })
}
_ => Err(TableError::TableFactorNotSupported.into()),
}
}
pub fn get_name(&self) -> &'a String {
self.name
}
pub fn get_alias(&self) -> &'a String {
match self.alias {
Some(alias) => alias,
None => self.name,
}
}
}
pub fn get_name(table_name: &ObjectName) -> Result<&String> {
let ObjectName(idents) = table_name;
idents
.last()
.map(|ident| &ident.value)
.ok_or_else(|| TableError::Unreachable.into())
}