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AggregateState

linkrs_query::executor::expression::functions::builtin::aggregate

Struct AggregateState 

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pub struct AggregateState {
Show 18 fields
    pub count: i64,
    pub sum: Value,
    pub min: Option<Value>,
    pub max: Option<Value>,
    pub values: Vec<Value>,
    pub distinct_values: HashSet<String>,
    pub percentile_values: Vec<f64>,
    pub std_values: Vec<f64>,
    pub variance_values: Vec<f64>,
    pub median_values: Vec<f64>,
    pub mode_values: Vec<Value>,
    pub bit_and_value: Option<i64>,
    pub bit_or_value: Option<i64>,
    pub bool_and_value: Option<bool>,
    pub bool_or_value: Option<bool>,
    pub group_concat_values: Vec<Value>,
    pub vec_sum: Value,
    pub vec_avg: Value,

}
Expand description

Aggregation status, used to accumulate the intermediate results of aggregate functions.

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§count: i64§sum: Value§min: Option<Value>§max: Option<Value>§values: Vec<Value>§distinct_values: HashSet<String>§percentile_values: Vec<f64>§std_values: Vec<f64>§variance_values: Vec<f64>§median_values: Vec<f64>§mode_values: Vec<Value>§bit_and_value: Option<i64>§bit_or_value: Option<i64>§bool_and_value: Option<bool>§bool_or_value: Option<bool>§group_concat_values: Vec<Value>§vec_sum: Value

Vector sum for VEC_SUM

§vec_avg: Value

Vector average for VEC_AVG

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impl AggregateState

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pub fn new() -> Self

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pub fn reset(&mut self)

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pub fn update( &mut self, function: &AggregateFunction, value: &Value, distinct: bool, )

Update the aggregation status.

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pub fn calculate_percentile( &self, percentile: f64, ) -> Result<Value, ExpressionError>

Calculating percentiles

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pub fn calculate_std(&self) -> Result<Value, ExpressionError>

Calculate the standard deviation

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pub fn calculate_bit_and(&self) -> Result<Value, ExpressionError>

Performing a bitwise AND operation

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pub fn calculate_bit_or(&self) -> Result<Value, ExpressionError>

Performing a bitwise OR operation

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pub fn calculate_group_concat(&self) -> Result<Value, ExpressionError>

Computing group joins

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pub fn calculate_variance(&self) -> Result<Value, ExpressionError>

Calculate the variance

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pub fn calculate_median(&self) -> Result<Value, ExpressionError>

Calculate the median

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pub fn calculate_mode(&self) -> Result<Value, ExpressionError>

Calculate the mode

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pub fn calculate_bool_and(&self) -> Result<Value, ExpressionError>

Performing a logical AND operation

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pub fn calculate_bool_or(&self) -> Result<Value, ExpressionError>

Performing a logical OR operation

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pub fn calculate_stddev_pop(&self) -> Result<Value, ExpressionError>

Calculate population standard deviation (divide by n)

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pub fn calculate_stddev_samp(&self) -> Result<Value, ExpressionError>

Calculate sample standard deviation (divide by n-1)

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pub fn calculate_product(&self) -> Result<Value, ExpressionError>

Calculate product of values

Trait Implementations§

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impl Clone for AggregateState

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for AggregateState

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

Formats the value using the given formatter. Read more
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impl Default for AggregateState

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fn default() -> Self

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

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