Trait diesel::query_builder::QueryFragment [−] [src]

pub trait QueryFragment<DB: Backend> {
    fn walk_ast(&self, pass: AstPass<DB>) -> QueryResult<()>;

    fn to_sql(&self, out: &mut DB::QueryBuilder) -> QueryResult<()> { ... }

    fn collect_binds(
        &self, 
        out: &mut DB::BindCollector, 
        metadata_lookup: &DB::MetadataLookup
    ) -> QueryResult<()> { ... }

    fn is_safe_to_cache_prepared(&self) -> QueryResult<bool> { ... }
}

An untyped fragment of SQL. This may be a complete SQL command (such as an update statement without a RETURNING clause), or a subsection (such as our internal types used to represent a WHERE clause). All methods on Connection that execute a query require this trait to be implemented.

Required Methods

Provided Methods

Trait Implementations

impl<DB> QueryId for QueryFragment<DB>
[src]

Implementors