initSidebarItems({"mod":[["dsl","Reexports various top level functions and core extensions that are too generic to export by default. This module exists to conveniently glob import in functions where you need them."],["expression_methods","Adds various methods to construct new expressions. These traits are exported by default, and implemented automatically."],["extensions","This module contains extensions that are added to core types to aid in building expressions. These traits are not exported by default. The are also re-exported in `diesel::expression::dsl`"],["helper_types","The types in this module are all shorthand for `PredicateType<Lhs, AsExpr<Rhs, Lhs>>`. Since we often need to return concrete types, instead of a boxed trait object, these can be useful for writing concise return types."],["sql_literal",""]],"trait":[["AsExpression","Describes how a type can be represented as an expression for a given type. These types couldn't just implement `Expression` directly, as many things can be used as an expression of multiple types. (`String` for example, can be used as either `VarChar` or `Text`)."],["BoxableExpression","Helper trait used when boxing expressions. This exists to work around the fact that Rust will not let us use non-core types as bounds on a trait object (you could not return `Box<Expression+NonAggregate>`)"],["Expression","Represents a typed fragment of SQL. Apps should not need to implement this type directly, but it may be common to use this as type boundaries. Libraries should consider using `infix_predicate!` or `postfix_predicate!` instead of implementing this directly."],["NonAggregate","Marker trait to indicate that an expression does not include any aggregate functions. Used to ensure that aggregate expressions aren't mixed with non-aggregate expressions in a select clause, and that they're never included in a where clause."],["SelectableExpression","Indicates that an expression can be selected from a source. The second type argument is optional, but is used to indicate that the right side of a left outer join is nullable, even if it wasn't before."]]});