Package org.eclipse.rdf4j.federated.algebra

## Interface QueryRef

- All Known Subinterfaces:
    `ExclusiveTupleExpr`, `ExclusiveTupleExprRenderer`, `FedXTupleExpr`, `StatementTupleExpr`
  All Known Implementing Classes:
    `CheckStatementPattern`, `EmptyNJoin`, `EmptyNUnion`, `ExclusiveArbitraryLengthPath`, `ExclusiveGroup`, `ExclusiveStatement`, `FederatedDescribeOperator`, `FedXStatementPattern`, `NJoin`, `NTuple`, `NUnion`, `PassThroughTupleExpr`, `SingleSourceQuery`, `StatementSourcePattern`

      public interface QueryRef

  Interface to access the `QueryInfo` from all FedX Algebra nodes. All FedX Algebra nodes should implement this interface.
  Author:
    Andreas Schwarte

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `QueryInfo` | `getQueryInfo()` | Retrieve the attached query information of the tuple expression

- - ### Method Detail

    - #### getQueryInfo

          QueryInfo getQueryInfo()

      Retrieve the attached query information of the tuple expression
      Returns:
        the `QueryInfo`