%YAML 1.2
---
aggregate_functions:
  - name: "count"
    description: Count a set of values
    impls:
      - args:
          - name: x
            value: any
        options:
          overflow:
            values: [SILENT, SATURATE, ERROR]
        nullability: DECLARED_OUTPUT
        decomposable: MANY
        intermediate: i64
        return: i64
  - name: "count"
    description: "Count a set of records (not field referenced)"
    impls:
      - options:
          overflow:
            values: [SILENT, SATURATE, ERROR]
        nullability: DECLARED_OUTPUT
        decomposable: MANY
        intermediate: i64
        return: i64
  - name: "any_value"
    description: >
      Selects an arbitrary value from a group of values.

      If the input is empty, the function returns null.
    impls:
      - args:
          - name: x
            value: any
        nullability: DECLARED_OUTPUT
        return: any?