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anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.cpp}::RexInputReplacementVisitor Class Reference
+ Inheritance diagram for anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.cpp}::RexInputReplacementVisitor:
+ Collaboration diagram for anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.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 RelAlgNodenode_to_keep_
 
const std::vector
< std::unique_ptr< const
RexScalar > > & 
scalar_sources_
 

Additional Inherited Members

- 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 1031 of file RelAlgAbstractInterpreter.cpp.

Constructor & Destructor Documentation

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

Member Function Documentation

RetType anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.cpp}::RexInputReplacementVisitor::visitInput ( const RexInput input) const
inlinefinalvirtual

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

Definition at line 1039 of file RelAlgAbstractInterpreter.cpp.

References CHECK_LT.

1039  {
1040  if (input->getSourceNode() == node_to_keep_) {
1041  const auto index = input->getIndex();
1042  CHECK_LT(index, scalar_sources_.size());
1043  return visit(scalar_sources_[index].get());
1044  } else {
1045  return input->deepCopy();
1046  }
1047  }
virtual std::unique_ptr< const RexScalar > visit(const RexScalar *rex_scalar) const
Definition: RexVisitor.h:27
unsigned getIndex() const
std::unique_ptr< RexInput > deepCopy() const
#define CHECK_LT(x, y)
Definition: Logger.h:200
const RelAlgNode * getSourceNode() const

Member Data Documentation

const RelAlgNode* anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.cpp}::RexInputReplacementVisitor::node_to_keep_
private

Definition at line 1050 of file RelAlgAbstractInterpreter.cpp.

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

Definition at line 1051 of file RelAlgAbstractInterpreter.cpp.


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