Trait mz_repr::explain::ExprHumanizer

pub trait ExprHumanizer: Debug {
    // Required methods
    fn humanize_id(&self, id: GlobalId) -> Option<String>;
    fn humanize_id_unqualified(&self, id: GlobalId) -> Option<String>;
    fn humanize_id_parts(&self, id: GlobalId) -> Option<Vec<String>>;
    fn humanize_scalar_type(&self, ty: &ScalarType) -> String;
    fn column_names_for_id(&self, id: GlobalId) -> Option<Vec<String>>;
    fn humanize_column(&self, id: GlobalId, column: usize) -> Option<String>;
    fn id_exists(&self, id: GlobalId) -> bool;

    // Provided method
    fn humanize_column_type(&self, typ: &ColumnType) -> String { ... }
}

A trait for humanizing components of an expression.

This will be most often used as part of the rendering context type for various Display$Format implementation.

Required Methods

fn humanize_id(&self, id: GlobalId) -> Option<String>

Attempts to return a human-readable string for the relation identified by id.

fn humanize_id_unqualified(&self, id: GlobalId) -> Option<String>

Same as above, but without qualifications, e.g., only foo for materialize.public.foo.

fn humanize_id_parts(&self, id: GlobalId) -> Option<Vec<String>>

Like Self::humanize_id, but returns the constituent parts of the name as individual elements.

fn humanize_scalar_type(&self, ty: &ScalarType) -> String

Returns a human-readable name for the specified scalar type.

fn column_names_for_id(&self, id: GlobalId) -> Option<Vec<String>>

Returns a vector of column names for the relation identified by id.

fn humanize_column(&self, id: GlobalId, column: usize) -> Option<String>

Returns the #column name for the relation identified by id.

fn id_exists(&self, id: GlobalId) -> bool

Returns whether the specified id exists.

Provided Methods

fn humanize_column_type(&self, typ: &ColumnType) -> String

Returns a human-readable name for the specified column type.

Trait Implementations

impl<'a, T> AsRef<&'a dyn ExprHumanizer> for PlanRenderingContext<'a, T>

fn as_ref(&self) -> &&'a dyn ExprHumanizer

Converts this type into a shared reference of the (usually inferred) input type.

impl<'a> AsRef<&'a dyn ExprHumanizer> for RenderingContext<'a>

fn as_ref(&self) -> &&'a dyn ExprHumanizer

Converts this type into a shared reference of the (usually inferred) input type.

Implementors

impl ExprHumanizer for DummyHumanizer

impl<'a> ExprHumanizer for ExprHumanizerExt<'a>