Module agg_types

Macros to generate match arms for AggType. IMPORTANT: These macros must be carefully maintained especially when adding new AggType/PbAggKind variants.

Macros

• materialized_input_state
  AggTypes that are implemented with a materialized input state.
• must_have_order_by
  AggTypes that must be called with ORDER BY clause. These are slightly different from variants not in result_unaffected_by_order_by, in that variants returned by this macro should be banned while the others should just be warned.
• ordered_set
  Ordered-set aggregate functions.
• result_unaffected_by_distinct
  AggTypes of which the aggregate results are not affected by the user given DISTINCT keyword.
• result_unaffected_by_order_by
  AggTypes of which the aggregate results are not affected by the user given ORDER BY clause.
• rewritten
  AggTypes that should’ve been rewritten to other kinds. These kinds should not appear when generating physical plan nodes.
• simply_cannot_two_phase
  AggTypes that are simply cannot 2-phased.
• single_value_state
  AggTypes that are implemented with a single value state (so-called stateless).
• single_value_state_iff_in_append_only
  AggTypes that are implemented with a single value state (so-called stateless) iff the input is append-only.
• unimplemented_in_stream
  AggTypes that are currently not supported in streaming mode.