anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor Class Reference

Inheritance diagram for anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor:

Collaboration diagram for anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor:

Public Member Functions
	RexInputReplacementVisitor (const RelAlgNode *node_to_keep, const std::vector< std::unique_ptr< const RexScalar >> &scalar_sources)
RetType	visitInput (const RexInput *input) const final
Public Member Functions inherited from RexVisitorBase< std::unique_ptr< const RexScalar > >
virtual std::unique_ptr< const RexScalar >	visit (const RexScalar *rex_scalar) const

Private Attributes
const RelAlgNode *	node_to_keep_
const std::vector < std::unique_ptr< const RexScalar > > &	scalar_sources_

Additional Inherited Members
Public Types inherited from RexDeepCopyVisitor
using	RowValues = std::vector< std::unique_ptr< const RexScalar >>
Static Public Member Functions inherited from RexDeepCopyVisitor
static std::vector< RowValues >	copy (std::vector< RowValues > const &rhs)
Protected Types inherited from RexDeepCopyVisitor
using	RetType = std::unique_ptr< const RexScalar >
Protected Member Functions inherited from RexDeepCopyVisitor
RetType	visitInput (const RexInput *input) const override
RetType	visitLiteral (const RexLiteral *literal) const override
RetType	visitSubQuery (const RexSubQuery *subquery) const override
RetType	visitRef (const RexRef *ref) const override
RetType	visitOperator (const RexOperator *rex_operator) const override
RetType	visitWindowFunctionOperator (const RexWindowFunctionOperator *rex_window_function_operator) const
RetType	visitCase (const RexCase *rex_case) const override

Detailed Description

The RexInputReplacement visitor visits each node in a given relational algebra expression and replaces the inputs to that expression with inputs from a different node in the RA tree. Used for coalescing nodes with complex expressions.

Definition at line 1657 of file RelAlgDag.cpp.

Constructor & Destructor Documentation

anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor::RexInputReplacementVisitor ( const RelAlgNode *  node_to_keep, const std::vector< std::unique_ptr< const RexScalar >> &  scalar_sources  )

inline

Definition at line 1659 of file RelAlgDag.cpp.

      : node_to_keep_(node_to_keep), scalar_sources_(scalar_sources) {}

Member Function Documentation

RetType anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor::visitInput ( const RexInput *  input ) const

inlinefinalvirtual

Implements RexVisitorBase< std::unique_ptr< const RexScalar > >.

Definition at line 1665 of file RelAlgDag.cpp.

References CHECK_LT.

                                                        {
    if (input->getSourceNode() == node_to_keep_) {
      const auto index = input->getIndex();
      CHECK_LT(index, scalar_sources_.size());
      return visit(scalar_sources_[index].get());
    } else {
      return input->deepCopy();
    }
  }

Member Data Documentation

const RelAlgNode* anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor::node_to_keep_

private

Definition at line 1676 of file RelAlgDag.cpp.

const std::vector<std::unique_ptr<const RexScalar> >& anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::RexInputReplacementVisitor::scalar_sources_

private

Definition at line 1677 of file RelAlgDag.cpp.

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The documentation for this class was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/RelAlgDag.cpp