Module mz_expr::explain

EXPLAIN support for structures defined in this crate.

Structs

• ExplainContext
  Explain context shared by all mz_repr::explain::Explain implementations in this crate.
• ExplainMultiPlan
  A structure produced by the explain_$format methods in mz_repr::explain::Explain implementations at points in the optimization pipeline identified with a DataflowDescription instance with plans of type T.
• ExplainSinglePlan
  A structure produced by the explain_$format methods in mz_repr::explain::Explain implementations for points in the optimization pipeline identified with a single plan of type T.
• ExplainSource
• HumanizedExplain
  A HumanizerMode that is unambiguous and should be used in EXPLAIN output.
• HumanizedExpr
  A helper struct for wrapping expressions whose text output is modulated by the presence of some local (inferred schema) or global (required redaction) context.
• HumanizedNotice
  A HumanizerMode that is ambiguous but allows us to print valid SQL statements, so it should be used in optimizer notices.
• PushdownInfo
  Carries metadata about the possibility of MFP pushdown for a source. (Likely to change, and only emitted when a context flag is enabled.)

Traits

• HumanizerMode
  A trait that abstracts the various ways in which we can humanize expressions.

Functions

• enforce_linear_chains
  Normalize the way inputs of multi-input variants are rendered.
• fmt_text_constant_rows