Package org.apache.flink.table.functions

Class TemporalTableFunctionImpl

java.lang.Object
org.apache.flink.table.functions.UserDefinedFunction
org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>
org.apache.flink.table.functions.TemporalTableFunction
org.apache.flink.table.functions.TemporalTableFunctionImpl
All Implemented Interfaces:
Serializable, org.apache.flink.table.functions.FunctionDefinition
@Internal public final class TemporalTableFunctionImpl extends org.apache.flink.table.functions.TemporalTableFunction
Class representing temporal table function over some history table. It takes one single argument, the timeAttribute, for which it returns matching version of the underlyingHistoryTable, from which this TemporalTableFunction was created.

This function shouldn't be evaluated. Instead calls to it should be rewritten by the optimiser into other operators (like Temporal Table Join).

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    static org.apache.flink.table.functions.TemporalTableFunction
    create(QueryOperation operationTree, org.apache.flink.table.expressions.Expression timeAttribute, org.apache.flink.table.expressions.Expression primaryKey)
     
    void
    eval(Timestamp t)
     
    org.apache.flink.table.expressions.Expression
    getPrimaryKey()
     
    org.apache.flink.api.java.typeutils.RowTypeInfo
    getResultType()
     
    org.apache.flink.table.expressions.Expression
    getTimeAttribute()
     
    org.apache.flink.table.types.inference.TypeInference
    getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)
     
    QueryOperation
    getUnderlyingHistoryTable()
     

    Methods inherited from class org.apache.flink.table.functions.TableFunction

    collect, finish, getKind, getParameterTypes, setCollector

    Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

    close, functionIdentifier, open, toString

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

    getRequirements, isDeterministic, supportsConstantFolding

  • Method Details

    • eval

      public void eval(Timestamp t)

    • getTimeAttribute

      public org.apache.flink.table.expressions.Expression getTimeAttribute()

    • getPrimaryKey

      public org.apache.flink.table.expressions.Expression getPrimaryKey()

    • getTypeInference

      public org.apache.flink.table.types.inference.TypeInference getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)
      Specified by:
      getTypeInference in interface org.apache.flink.table.functions.FunctionDefinition
      Overrides:
      getTypeInference in class org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

    • getResultType

      public org.apache.flink.api.java.typeutils.RowTypeInfo getResultType()
      Overrides:
      getResultType in class org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

    • getUnderlyingHistoryTable

      public QueryOperation getUnderlyingHistoryTable()

    • create

      public static org.apache.flink.table.functions.TemporalTableFunction create(QueryOperation operationTree, org.apache.flink.table.expressions.Expression timeAttribute, org.apache.flink.table.expressions.Expression primaryKey)