Structs

Extends the test case syntax to support MirRelationExprs
Extends the test case syntax to support MirScalarExprs
A catalog that holds types of objects previously created for the unit test.

Functions

Builds a MirRelationExpr from a string.
Builds a MirScalarExpr from a string.
Turns the json version of a MirRelationExpr into the mz_lowertest::to_json syntax.