Struct mz_expr_test_util::TestCatalog

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

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

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

Fields

objects: HashMap<String, (GlobalId, RelationType)>

names: HashMap<GlobalId, String>

Implementations

impl<'a> TestCatalog

pub fn insert(
    &mut self,
    name: &str,
    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(crate) fn get(&'a self, name: &str) -> Option<&'a (GlobalId, 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 handle_test_command(&mut self, spec: &str) -> Result<(), String>

Handles instructions to modify the catalog.

Currently supported commands:

• (defsource [types_of_cols] [[optional_sets_of_key_cols]]) - insert a source into the catalog.

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

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

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

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

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