Bonobo is a query engine that uses the Arrow type system and aims for maximum compatibility with the Substrait specification. It is capable of:

• Creating plans via SQL or a Dataframe API
• Serializing plans to and from Substrait
• Manipulating/Splitting/Validating query plans

Bonobo does not, by design, implement execution kernels for any plan relations or expressions. Instead, Bonobo aims to make it simple to delegate plans to any Substrait-compatible backends for distributed execution.

go get github.com/joellubi/bonobo

Bonobo is still in early stages of development. Features are being added quickly and the API is subject to change.

For a feature to be considered implemented it should:

• Be supported using the Dataframe API
• Implement both serialization and deserialization to/from Substrait proto

Features:

• Logical Relations
  • ReadRel
    • NamedTable
    • VirtualTable
    • ExtensionTable
    • LocalFiles
    • Filter
    • Project
  • FilterRel
  • FetchRel
  • AggregateRel
  • SortRel
  • JoinRel
  • ProjectRel
  • SetRel
  • ExtensionSingleRel
  • ExtensionMultiRel
  • ExtensionLeafRel
  • CrossRel
  • ReferenceRel
  • WriteRel
  • DdlRel
• Physical Relations (TBD whether they will be supported)
• Expressions
  • Literal
  • FieldReference
  • ScalarFunction
  • WindowFunction
  • IfThen
  • SwitchExpression
  • SingularOrList
  • MultiOrList
  • Cast
  • Subquery
  • Nested
• Extensions
  • Simple Extensions
    • Type
    • Type Variation
    • Function
      • Scalar Function
      • Aggregate Function
      • Window Function
    • Type Syntax Parsing
  • Advanced Extensions
  • Capabilities
• SQL Support
  • Query Clauses
    • SELECT
    • FROM
    • WHERE
    • GROUP BY
    • ORDER BY
    • PARTITION BY
    • LIMIT
    • JOIN
    • OVER
    • UNION
  • Binary Operators
  • Parenthesis
  • Expression Aliases
  • Identifier Aliases
  • Table Subqueries
  • Scalar Subqueries
  • Functions