org.apache.flink.table.planner.functions.sql

Class SqlListAggFunction

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlFunction

org.apache.calcite.sql.SqlAggFunction

org.apache.flink.table.planner.functions.sql.SqlListAggFunction

All Implemented Interfaces:

org.apache.calcite.plan.Context, org.apache.calcite.schema.Wrapper

public class SqlListAggFunction
extends org.apache.calcite.sql.SqlAggFunction

LISTAGG aggregate function returns the concatenation of a list of values that are input to the function.

NOTE: The difference between this and SqlStdOperatorTable.LISTAGG is that: (1). constraint the second parameter must to be a character literal. (2). not require over clause to use this aggregate function.

Field Summary

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
SqlListAggFunction()

Method Summary

Modifier and Type	Method and Description
List<org.apache.calcite.rel.type.RelDataType>	getParameterTypes(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)
org.apache.calcite.rel.type.RelDataType	getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

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

allowsFilter, allowsNullTreatment, getDistinctOptionality, isAggregator, isQuantifierAllowed, requiresGroupOrder, requiresOrder, requiresOver, unwrap, 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, 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, preValidateCall, requiresDecimalExpansion, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateOperands, validRexOperands

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlListAggFunction

public SqlListAggFunction()

Method Detail

getParameterTypes

public List<org.apache.calcite.rel.type.RelDataType> getParameterTypes(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

Overrides:

getParameterTypes in class org.apache.calcite.sql.SqlAggFunction

getReturnType

public org.apache.calcite.rel.type.RelDataType getReturnType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

Overrides:

getReturnType in class org.apache.calcite.sql.SqlAggFunction