Struct mz_repr::explain::ExprHumanizerExt

pub struct ExprHumanizerExt<'a> {
    items: BTreeMap<GlobalId, TransientItem>,
    inner: &'a dyn ExprHumanizer,
}

An ExprHumanizer that extends the inner instance with shadow items that are reported as present, even though they might not exist in inner.

Fields

items: BTreeMap<GlobalId, TransientItem>

A map of custom items that might not exist in the backing inner humanizer, but are reported as present by this humanizer instance.

inner: &'a dyn ExprHumanizer

The inner humanizer used to resolve queries for GlobalId values not present in the items map.

Implementations

impl<'a> ExprHumanizerExt<'a>

pub fn new( items: BTreeMap<GlobalId, TransientItem>, inner: &'a dyn ExprHumanizer, ) -> Self

Trait Implementations

impl<'a> Debug for ExprHumanizerExt<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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

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.

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

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