org.apache.calcite.sql.fun

Class SqlAnyValueAggFunction

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlFunction

org.apache.calcite.sql.SqlAggFunction

org.apache.calcite.sql.fun.SqlAnyValueAggFunction

All Implemented Interfaces:

Context, Wrapper

public class SqlAnyValueAggFunction
extends SqlAggFunction

Definition of the ANY_VALUE aggregate functions, returning any one of the values which go into it.

Field Summary

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
SqlAnyValueAggFunction(SqlKind kind) Creates a SqlAnyValueAggFunction.

Method Summary

Modifier and Type	Method and Description
Optionality	getDistinctOptionality() Returns whether this aggregate function allows the DISTINCT keyword.
SqlAggFunction	getRollup() Gets rollup aggregation function.
<T> T	unwrap(Class<T> clazz) Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

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

allowsFilter, allowsNullTreatment, getParameterTypes, getReturnType, isAggregator, isPercentile, isQuantifierAllowed, requiresGroupOrder, requiresOrder, requiresOver, validateCall

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

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

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

acceptCall, acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getMonotonicity, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getSignatureTemplate, getStrongPolicyInference, hashCode, inferReturnType, inferReturnType, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, isSymmetrical, leftPrec, not, preValidateCall, requiresDecimalExpansion, reverse, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateOperands, validRexOperands

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.schema.Wrapper

maybeUnwrap, unwrapOrThrow

Constructor Detail

SqlAnyValueAggFunction

public SqlAnyValueAggFunction(SqlKind kind)

Creates a SqlAnyValueAggFunction.

Method Detail

unwrap

public <T> T unwrap(Class<T> clazz)

Description copied from interface: Wrapper

Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Specified by:

unwrap in interface Wrapper

Overrides:

unwrap in class SqlAggFunction

getDistinctOptionality

public Optionality getDistinctOptionality()

Description copied from class: SqlAggFunction

Returns whether this aggregate function allows the DISTINCT keyword.

The default implementation returns Optionality.OPTIONAL, which is appropriate for most aggregate functions, including SUM and COUNT.

Some aggregate functions, for example MIN, produce the same result with or without DISTINCT, and therefore return Optionality.IGNORED to indicate this. For such functions, Calcite will probably remove DISTINCT while optimizing the query.

Overrides:

getDistinctOptionality in class SqlAggFunction

getRollup

public SqlAggFunction getRollup()

Description copied from class: SqlAggFunction

Gets rollup aggregation function.

Overrides:

getRollup in class SqlAggFunction