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

Class SqlFirstLastValueAggFunction

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.SqlFirstLastValueAggFunction
All Implemented Interfaces:
org.apache.calcite.plan.Context, org.apache.calcite.schema.Wrapper
public class SqlFirstLastValueAggFunction extends org.apache.calcite.sql.SqlAggFunction
FIRST_VALUE and LAST_VALUE aggregate functions return the first or the last value in a list of values that are input to the function.

NOTE: The difference between this and SqlFirstLastValueAggFunction is that this can be used without over clause.

  • Field Summary

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

    kind, MDX_PRECEDENCE, NL

  • Constructor Summary

    Constructors
    Constructor
    Description
    SqlFirstLastValueAggFunction(org.apache.calcite.sql.SqlKind kind)
     

  • Method Summary

    Modifier and Type
    Method
    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, getRollup, isAggregator, isPercentile, 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, createCall, createCall, createCall, deriveOperandType, 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 Details

    • SqlFirstLastValueAggFunction

      public SqlFirstLastValueAggFunction(org.apache.calcite.sql.SqlKind kind)

  • Method Details

    • 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