Module substrait_expr::helpers

Helpers to extract information from Substrait plans

Substrait objects are protobuf generated objects. They generally have getters and setters and nothing much useful beyond that. This makes protobuf objects difficult to work with.

Rather than create yet another in-memory representation of Substrait messages we chose, in this library, to stick with the underlying protobuf representation as much as possible. In some cases we could not. This crate is a combination of non-protobuf types (e.g. for things like the schema and registry) and extension traits that add new functionality to the existing protobuf types. There are extension traits for expressions, types, and literals

Modules

• expr
• literals
• registry
• schema
• types