Module spark_connect_rs::expressions

The spark-connect-rs crate is currently just a meta-package shim for spark-connect-core Traits for converting Rust Types to Spark Connect Expression Types

Spark Connect has a few different ways of creating expressions and different gRPC methods require expressions in different forms. These traits are used to either translate a value into a spark::Expression or into a spark::expression::Literal.

Overview

• ToExpr accepts a &str, String, or Column. This trait uses the method from on the Column to create an expression.
• ToLiteral is used for taking rust types into a spark::expression::Literal. These values are then converted into an expression
• ToLiteralExpr` takes a literal value and converts it into a spark::Expression
• ToVecExpr many gRPC methods require a Vec<spark::Expression> this trait is a shorthand for that transformation
• ToFilterExpr is specifically used for filter statements

Traits

• ToExpr
  Translate string values into a spark::Expression
• ToFilterExpr
  Create a filter expression
• ToLiteral
  Translate a rust value into a literal type
• ToLiteralExpr
  Wrap a literal value into a spark::Expression
• ToVecExpr
  Translate values into a Vec<spark::Expression>