65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
package jet
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// MODE computes the most frequent value of the aggregated argument
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func MODE() *OrderSetAggregateFunc {
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return newOrderSetAggregateFunction("MODE", nil)
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}
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// PERCENTILE_CONT computes a value corresponding to the specified fraction within the ordered set of
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// aggregated argument values. This will interpolate between adjacent input items if needed.
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func PERCENTILE_CONT(fraction FloatExpression) *OrderSetAggregateFunc {
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return newOrderSetAggregateFunction("PERCENTILE_CONT", fraction)
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}
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// PERCENTILE_DISC computes the first value within the ordered set of aggregated argument values whose position
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// in the ordering equals or exceeds the specified fraction. The aggregated argument must be of a sortable type.
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func PERCENTILE_DISC(fraction FloatExpression) *OrderSetAggregateFunc {
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return newOrderSetAggregateFunction("PERCENTILE_DISC", fraction)
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}
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// OrderSetAggregateFunc implementation of order set aggregate function
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type OrderSetAggregateFunc struct {
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name string
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fraction FloatExpression
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orderBy Window
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}
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func newOrderSetAggregateFunction(name string, fraction FloatExpression) *OrderSetAggregateFunc {
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return &OrderSetAggregateFunc{
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name: name,
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fraction: fraction,
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}
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}
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// WITHIN_GROUP_ORDER_BY specifies ordered set of aggregated argument values
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func (p *OrderSetAggregateFunc) WITHIN_GROUP_ORDER_BY(orderBy OrderByClause) Expression {
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p.orderBy = ORDER_BY(orderBy)
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return newOrderSetAggregateFuncExpression(*p)
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}
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func newOrderSetAggregateFuncExpression(aggFunc OrderSetAggregateFunc) *orderSetAggregateFuncExpression {
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ret := &orderSetAggregateFuncExpression{
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OrderSetAggregateFunc: aggFunc,
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}
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ret.ExpressionInterfaceImpl.Root = ret
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return ret
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}
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type orderSetAggregateFuncExpression struct {
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ExpressionInterfaceImpl
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OrderSetAggregateFunc
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}
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func (p *orderSetAggregateFuncExpression) serialize(statement StatementType, out *SQLBuilder, options ...SerializeOption) {
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out.WriteString(p.name)
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if p.fraction != nil {
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wrap(p.fraction).serialize(statement, out, FallTrough(options)...)
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} else {
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wrap().serialize(statement, out, FallTrough(options)...)
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}
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out.WriteString("WITHIN GROUP")
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p.orderBy.serialize(statement, out)
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}
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