Package org.apache.druid.sql.calcite.aggregation.builtin

Class SingleValueSqlAggregator

java.lang.Object

org.apache.druid.sql.calcite.aggregation.builtin.SimpleSqlAggregator

org.apache.druid.sql.calcite.aggregation.builtin.SingleValueSqlAggregator

All Implemented Interfaces:

SqlAggregator

public class SingleValueSqlAggregator
extends SimpleSqlAggregator

This class serves as binding for Single Value Aggregator. Returns a single value in cases of subqueries used in expressions

Constructor Summary

Constructors

Constructor	Description
SingleValueSqlAggregator()

Method Summary

Modifier and Type	Method	Description
org.apache.calcite.sql.SqlAggFunction	calciteFunction()	Returns the SQL operator corresponding to this aggregation function.

Methods inherited from class org.apache.druid.sql.calcite.aggregation.builtin.SimpleSqlAggregator

badTypeException, toDruidAggregation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.druid.sql.calcite.aggregation.SqlAggregator

toDruidAggregation

Constructor Details

SingleValueSqlAggregator

public SingleValueSqlAggregator()

Method Details

calciteFunction

public org.apache.calcite.sql.SqlAggFunction calciteFunction()

Description copied from interface: SqlAggregator

Returns the SQL operator corresponding to this aggregation function. Should be a singleton.

Returns:

operator