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LeadFunction

oxibase::functions::window

Struct LeadFunction 

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pub struct LeadFunction { /* private fields */ }
Expand description

LEAD window function

Returns the value from a row that is offset rows after the current row within the partition. If there is no such row, returns the default value.

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impl LeadFunction

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pub fn new(offset: usize, default_value: Value) -> Self

Create a new LEAD function with the specified offset and default value

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pub fn with_offset(offset: usize) -> Self

Create a new LEAD function with offset 1 and NULL default

Trait Implementations§

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impl Default for LeadFunction

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fn default() -> LeadFunction

Returns the “default value” for a type. Read more
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impl WindowFunction for LeadFunction

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fn name(&self) -> &str

Get the function name
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fn info(&self) -> FunctionInfo

Get function information
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fn process( &self, partition: &[Value], _order_by: &[Value], current_row: usize, ) -> Result<Value>

Process the window function Read more
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fn clone_box(&self) -> Box<dyn WindowFunction>

Clone the function into a new instance

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impl<T> Any for T
where T: 'static + ?Sized,

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fn from(t: T) -> T

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