Struct mz_expr_parser::TestCatalog

pub struct TestCatalog {
    objects: BTreeMap<String, (GlobalId, Vec<String>, RelationType)>,
    names: BTreeMap<GlobalId, String>,
}

A catalog that holds types of objects previously created for the unit test.

This is for the purpose of allowing MirRelationExprs to refer to them later.

Fields

objects: BTreeMap<String, (GlobalId, Vec<String>, RelationType)>

names: BTreeMap<GlobalId, String>

Implementations

impl<'a> TestCatalog

pub fn insert( &mut self, name: &str, cols: Vec<String>, typ: RelationType, transient: bool, ) -> Result<GlobalId, String>

Registers an object in the catalog.

Specifying transient as true allows the object to be deleted by Self::remove_transient_objects.

Returns the GlobalId assigned by the catalog to the object.

Errors if an object of the same name is already in the catalog.

pub fn get( &'a self, name: &str, ) -> Option<&'a (GlobalId, Vec<String>, RelationType)>

pub fn get_source_name(&'a self, id: &GlobalId) -> Option<&'a String>

Looks up the name of the object referred to as id.

pub fn remove_transient_objects(&mut self)

Clears all transient objects from the catalog.

Trait Implementations

impl Debug for TestCatalog

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

Formats the value using the given formatter.

impl Default for TestCatalog

fn default() -> TestCatalog

Returns the “default value” for a type.

impl ExprHumanizer for TestCatalog

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.