Module mz_expr::relation

Modules

• canonicalize
  Utility functions to transform parts of a single MirRelationExpr into canonical form.
• func
• join_input_mapper
• proto_aggregate_func
  Nested message and enum types in ProtoAggregateFunc.
• proto_table_func
  Nested message and enum types in ProtoTableFunc.
• proto_window_frame
  Nested message and enum types in ProtoWindowFrame.
• structured_diff 🔒
  An iterator over AST structures, which calls out nodes in difference.

Structs

• AggregateExpr
  Describes an aggregation expression.
• ColumnOrder
  Specification for an ordering by a column.
• JoinInputCharacteristics
  Characteristics of a join order candidate collection.
• LetRecLimit
  Maximum iterations for a LetRec.
• ProtoAggregateExpr
• ProtoAggregateFunc
• ProtoColumnOrder
• ProtoRowSetFinishing
• ProtoTableFunc
• ProtoWindowFrame
• RowSetFinishing
  Instructions for finishing the result of a query.
• WindowFrame
  Describe a window frame, e.g. RANGE UNBOUNDED PRECEDING or ROWS BETWEEN 5 PRECEDING AND CURRENT ROW.

Enums

• AccessStrategy
  For a global Get, this indicates whether we are going to read from Persist or from an index. (See comment in MirRelationExpr::Get.)
• JoinImplementation
  Describe a join implementation in dataflow.
• MirRelationExpr
  An abstract syntax tree which defines a collection.
• WindowFrameBound
  Specifies WindowFrame’s start_bound and end_bound
• WindowFrameUnits
  Describe how frame bounds are interpreted

Constants

• RECURSION_LIMIT
  A recursion limit to be used for stack-safe traversals of MirRelationExpr trees.

Traits

• CollectionPlan
  A trait for types that describe how to build a collection.

Functions

• compare_columns
  Compare left and right using order. If that doesn’t produce a strict ordering, call tiebreaker.
• non_nullable_columns
  Augment non-nullability of columns, by observing either