Trait AnyQuery

Source

pub trait AnyQuery:
    Debug
    + Any
    + Send
    + Sync {
    // Required methods
    fn as_any(&self) -> &dyn Any;
    fn format(&self, col: &str) -> String;
    fn to_expr(&self, col: String) -> Expr;
    fn dyn_eq(&self, other: &dyn AnyQuery) -> bool;
}

Expand description

Different scalar indices may support different kinds of queries

For example, a btree index can support a wide range of queries (e.g. x > 7) while an index based on FTS only supports queries like “x LIKE ‘foo’”

This trait is used when we need an object that can represent any kind of query

Note: if you are implementing this trait for a query type then you probably also need to implement the crate::scalar::expression::ScalarQueryParser trait to create instances of your query at parse time.