Package org.apache.flink.table.expressions

Class UnresolvedCallExpression

java.lang.Object
org.apache.flink.table.expressions.UnresolvedCallExpression
All Implemented Interfaces:
org.apache.flink.table.expressions.Expression
@PublicEvolving public final class UnresolvedCallExpression extends Object implements org.apache.flink.table.expressions.Expression
Unresolved call expression for calling a function identified by a FunctionDefinition.

This is purely an API facing expression with unvalidated arguments and unknown output data type.

A unresolved call contains:

  • a FunctionDefinition that identifies the function to be called
  • an optional FunctionIdentifier that tracks the origin of a function
  • whether the called function is temporary

  • Method Details

    • getFunctionIdentifier

      public Optional<org.apache.flink.table.functions.FunctionIdentifier> getFunctionIdentifier()

    • getFunctionDefinition

      public org.apache.flink.table.functions.FunctionDefinition getFunctionDefinition()

    • replaceArgs

      public UnresolvedCallExpression replaceArgs(List<org.apache.flink.table.expressions.Expression> args)

    • resolve

      public org.apache.flink.table.expressions.CallExpression resolve(List<org.apache.flink.table.expressions.ResolvedExpression> args, org.apache.flink.table.types.DataType dataType)

    • asSummaryString

      public String asSummaryString()
      Specified by:
      asSummaryString in interface org.apache.flink.table.expressions.Expression

    • getChildren

      public List<org.apache.flink.table.expressions.Expression> getChildren()
      Specified by:
      getChildren in interface org.apache.flink.table.expressions.Expression

    • accept

      public <R> R accept(org.apache.flink.table.expressions.ExpressionVisitor<R> visitor)
      Specified by:
      accept in interface org.apache.flink.table.expressions.Expression

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object