org.apache.calcite.sql.fun

Class SqlAvgAggFunction

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlFunction

org.apache.calcite.sql.SqlAggFunction

org.apache.calcite.sql.fun.SqlAvgAggFunction

public class SqlAvgAggFunction
extends SqlAggFunction

Avg is an aggregator which returns the average of the values which go into it. It has precisely one argument of numeric type (int, long, float, double), and the result is the same type.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SqlAvgAggFunction.Subtype Sub-type of aggregate function.

Field Summary

Fields inherited from class org.apache.calcite.sql.SqlOperator

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
SqlAvgAggFunction(RelDataType type, SqlAvgAggFunction.Subtype subtype) Creates a SqlAvgAggFunction

Method Summary

Methods

Modifier and Type	Method and Description
List<RelDataType>	getParameterTypes(RelDataTypeFactory typeFactory)
RelDataType	getReturnType(RelDataTypeFactory typeFactory)
SqlAvgAggFunction.Subtype	getSubtype() Returns the specific function, e.g.

Methods inherited from class org.apache.calcite.sql.SqlAggFunction

isAggregator, isQuantifierAllowed, validateCall

Methods inherited from class org.apache.calcite.sql.SqlFunction

deriveType, getFunctionType, getNameAsId, getParamTypes, getSqlIdentifier, getSyntax, unparse, validateQuantifier

Methods inherited from class org.apache.calcite.sql.SqlOperator

acceptCall, acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, hashCode, inferReturnType, inferReturnType, isDeterministic, isDynamicFunction, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateOperands, validRexOperands

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SqlAvgAggFunction

public SqlAvgAggFunction(RelDataType type,
                 SqlAvgAggFunction.Subtype subtype)

Creates a SqlAvgAggFunction

Parameters:

type - Data type

subtype - Specific function, e.g. AVG or STDDEV_POP

Method Detail

getParameterTypes

public List<RelDataType> getParameterTypes(RelDataTypeFactory typeFactory)

getReturnType

public RelDataType getReturnType(RelDataTypeFactory typeFactory)

getSubtype

public SqlAvgAggFunction.Subtype getSubtype()

Returns the specific function, e.g. AVG or STDDEV_POP.

Returns:

Subtype