Module relational 

Relational Volcano operators.

Each operator family owns its state and lifecycle in a focused module while this facade preserves the public construction API.

Structs

AggregateSpec

Filter

Pipelined WHERE operator. Drops rows whose predicate evaluates to false or NULL; truthy rows pass through unchanged.

HashAggregate

Limit

Project

Per-row scalar projection. Each (alias, expr) pair is evaluated against the input row and written under alias in the output. The child schema is replaced with the output aliases.

SetOperation

Byte-bounded compatibility wrapper for SQL set operations.

Sort

SortKey

Window

WindowSpec

Enums

AggregateKind

WindowKind

Traits

AggregateExecutor

Blocking group-by + aggregate. Pulls every row from the child during open, hashes each row by its group key, and folds the aggregates over each group’s row set. Groups are emitted in the order they were first observed.

ExpressionEvaluator

RowPredicate

WindowExecutor

Byte-bounded window operator. Input sorting, random-access partitions, and output rows use disk-backed buffers; only fixed-size batches are decoded at the Volcano boundary.

Functions

compare_sort_key_values

Compare two pre-computed sort-key vectors under keys semantics: per-key direction plus PostgreSQL NULLS placement (default NULLS LAST for ascending, NULLS FIRST for descending).

Type Aliases

SharedExpressionEvaluator

SharedRowPredicate