Module dataflow_types::explain

This module houses a pretty printer for the parts of a DataflowDescription that are relevant to dataflow rendering.

Format details:

• Sources that have LinearOperators come first. The format is “Source ():” followed by the predicates of the LinearOperator and then the projection.
• Intermediate views in the dataflow come next. The format is “View ():” followed by the output of expr::explain::ViewExplanation.
• Last is the view or query being explained. The format is “Query:” followed by the output of expr::explain::ViewExplanation.
• If there are no sources with some LinearOperator and no intermediate views, then the format is identical to the format of expr::explain::ViewExplanation.

It’s important to avoid trailing whitespace everywhere, as plans may be printed in contexts where trailing whitespace is unacceptable, like sqllogictest files.

Structs

DataflowGraphFormatter

Explanation

An Explanation facilitates pretty-printing of the parts of a DataflowDescription that are relevant to dataflow rendering.

JsonViewFormatter

Traits

ViewFormatter