Trait diesel::query_builder::QueryBuilder

[+] Show declaration

pub trait QueryBuilder<DB: Backend> {
    fn push_sql(&mut self, sql: &str);
    fn push_identifier(&mut self, identifier: &str) -> QueryResult<()>;
    fn push_bind_param(&mut self);
    fn finish(self) -> String;
}

[−] Expand description

Constructs a SQL query from a Diesel AST.

The only reason you should ever need to interact with this trait is if you are extending Diesel with support for a new backend. Plugins which extend the query builder with new capabilities will interact with AstPass instead.

Required Methods

fn push_sql(&mut self, sql: &str)[−]

Add sql to the end of the query being constructed.

fn push_identifier(&mut self, identifier: &str) -> QueryResult<()>[−]

Quote identifier, and add it to the end of the query being constructed.

fn push_bind_param(&mut self)[−]

Add a placeholder for a bind parameter to the end of the query being constructed.

fn finish(self) -> String[−]

Returns the constructed SQL query.

Implementors

• impl QueryBuilder<Mysql> for MysqlQueryBuilder

• impl QueryBuilder<Pg> for PgQueryBuilder

• impl QueryBuilder<Sqlite> for SqliteQueryBuilder