use diesel::backend::Backend;
use diesel::query_builder::*;
use diesel::result::QueryResult;
use diesel::RunQueryDsl;
#[derive(Debug, Clone)]
pub struct DropDatabaseStatement {
db_name: String,
if_exists: bool,
}
impl DropDatabaseStatement {
pub fn new(db_name: &str) -> Self {
DropDatabaseStatement {
db_name: db_name.to_owned(),
if_exists: false,
}
}
pub fn if_exists(self) -> Self {
DropDatabaseStatement {
if_exists: true,
..self
}
}
}
impl<DB: Backend> QueryFragment<DB> for DropDatabaseStatement {
fn walk_ast<'b>(&'b self, mut out: AstPass<'_, 'b, DB>) -> QueryResult<()> {
out.push_sql("DROP DATABASE ");
if self.if_exists {
out.push_sql("IF EXISTS ");
}
out.push_identifier(&self.db_name)?;
Ok(())
}
}
impl<Conn> RunQueryDsl<Conn> for DropDatabaseStatement {}
impl QueryId for DropDatabaseStatement {
type QueryId = ();
const HAS_STATIC_QUERY_ID: bool = false;
}
#[derive(Debug, Clone)]
pub struct CreateDatabaseStatement {
db_name: String,
}
impl CreateDatabaseStatement {
pub fn new(db_name: &str) -> Self {
CreateDatabaseStatement {
db_name: db_name.to_owned(),
}
}
}
impl<DB: Backend> QueryFragment<DB> for CreateDatabaseStatement {
fn walk_ast<'b>(&'b self, mut out: AstPass<'_, 'b, DB>) -> QueryResult<()> {
out.push_sql("CREATE DATABASE ");
out.push_identifier(&self.db_name)?;
Ok(())
}
}
impl<Conn> RunQueryDsl<Conn> for CreateDatabaseStatement {}
impl QueryId for CreateDatabaseStatement {
type QueryId = ();
const HAS_STATIC_QUERY_ID: bool = false;
}
pub fn drop_database(db_name: &str) -> DropDatabaseStatement {
DropDatabaseStatement::new(db_name)
}
pub fn create_database(db_name: &str) -> CreateDatabaseStatement {
CreateDatabaseStatement::new(db_name)
}