Struct AggregateFunction 

pub struct AggregateFunction {
    pub function_reference: u32,
    pub arguments: Vec<FunctionArgument>,
    pub options: Vec<FunctionOption>,
    pub output_type: Option<Type>,
    pub phase: i32,
    pub sorts: Vec<SortField>,
    pub invocation: i32,
    pub args: Vec<Expression>,
}

An aggregate function.

Fields

function_reference: u32

Points to a function_anchor defined in this plan, which must refer to an aggregate function in the associated YAML file. Required; 0 is considered to be a valid anchor/reference.

arguments: Vec<FunctionArgument>

The arguments to be bound to the function. This must have exactly the number of arguments specified in the function definition, and the argument types must also match exactly:

• Value arguments must be bound using FunctionArgument.value, and the expression in that must yield a value of a type that a function overload is defined for.
• Type arguments must be bound using FunctionArgument.type, and a function overload must be defined for that type.
• Enum arguments must be bound using FunctionArgument.enum followed by Enum.specified, with a string that case-insensitively matches one of the allowed options.
• Optional enum arguments must be bound using FunctionArgument.enum followed by either Enum.specified or Enum.unspecified. If specified, the string must case-insensitively match one of the allowed options.

options: Vec<FunctionOption>

Options to specify behavior for corner cases, or leave behavior unspecified if the consumer does not need specific behavior in these cases.

output_type: Option<Type>

Must be set to the return type of the function, exactly as derived using the declaration in the extension.

phase: i32

Describes which part of the aggregation to perform within the context of distributed algorithms. Required. Must be set to INITIAL_TO_RESULT for aggregate functions that are not decomposable.

sorts: Vec<SortField>

If specified, the aggregated records are ordered according to this list before they are aggregated. The first sort field has the highest priority; only if a sort field determines two records to be equivalent is the next field queried. This field is optional.

invocation: i32

Specifies whether equivalent records are merged before being aggregated. Optional, defaults to AGGREGATION_INVOCATION_ALL.

args: Vec<Expression>

👎Deprecated

deprecated; use arguments instead

Implementations

impl AggregateFunction

pub fn phase(&self) -> AggregationPhase

Returns the enum value of phase, or the default if the field is set to an invalid enum value.

pub fn set_phase(&mut self, value: AggregationPhase)

Sets phase to the provided enum value.

pub fn invocation(&self) -> AggregationInvocation

Returns the enum value of invocation, or the default if the field is set to an invalid enum value.

pub fn set_invocation(&mut self, value: AggregationInvocation)

Sets invocation to the provided enum value.

Trait Implementations

impl Clone for AggregateFunction

fn clone(&self) -> AggregateFunction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AggregateFunction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AggregateFunction

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AggregateFunction

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Message for AggregateFunction

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for AggregateFunction

fn eq(&self, other: &AggregateFunction) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for AggregateFunction

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AggregateFunction