Struct WindowFuncSpec 

pub struct WindowFuncSpec {
    pub alias: String,
    pub func_name: String,
    pub args: Vec<SqlExpr>,
    pub partition_by: Vec<SqlExpr>,
    pub order_by: Vec<(SqlExpr, bool)>,
    pub frame: WindowFrame,
}

A window function specification.

Fields

alias: String

Output column name (e.g., “row_num”, “running_sum”).

func_name: String

Function name: row_number, rank, dense_rank, ntile, percent_rank, cume_dist, lag, lead, nth_value, sum, count, avg, min, max, first_value, last_value.

args: Vec<SqlExpr>

Function arguments (e.g., salary for SUM(salary)). Empty for ROW_NUMBER.

partition_by: Vec<SqlExpr>

PARTITION BY expressions. Empty = single partition (entire result set).

order_by: Vec<(SqlExpr, bool)>

ORDER BY within each partition: [(expr, ascending)].

frame: WindowFrame

Window frame specification.

Trait Implementations

impl Clone for WindowFuncSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WindowFuncSpec

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WindowFuncSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for WindowFuncSpec

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl Serialize for WindowFuncSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for WindowFuncSpec

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

fn size_hint(&self) -> Option<TrustedSizeHint>

Returns a trusted upper bound for the number of bytes written by the next call to Self::write, or None when it cannot be determined cheaply.

fn max_size() -> Option<TrustedSizeHint>

Returns a trusted upper bound valid for every value of this type.

fn write_slice<W>(values: &[Self], writer: &mut W) -> Result<(), Error>

where W: Write, Self: Sized,

Writes the MessagePack representation of a slice of values into the provided writer.