Inheritance diagram for anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor:

Collaboration diagram for anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor:

Public Member Functions
	RexInputBackpropagationVisitor (RelProject *node)

Public Member Functions inherited from RexVisitorBase< std::unique_ptr< const RexScalar > >
virtual std::unique_ptr< const RexScalar >	visit (const RexScalar *rex_scalar) const

Protected Member Functions
RetType	visitInput (const RexInput *rex_input) const final

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

Private Attributes
RelProject *	node_

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 >

Detailed Description

Propagate an input backwards in the RA tree. With the exception of joins, all inputs must be carried through the RA tree. This visitor takes as a parameter a source projection RA Node, then checks to see if any inputs do not reference the source RA node (which implies the inputs reference a node farther back in the tree). The input is then backported to the source projection node, and a new input is generated which references the input on the source RA node, thereby carrying the input through the intermediate query step.

Definition at line 1850 of file RelAlgDagBuilder.cpp.

Constructor & Destructor Documentation

◆ RexInputBackpropagationVisitor()

anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor::RexInputBackpropagationVisitor ( RelProject * node )

inline

Definition at line 1852 of file RelAlgDagBuilder.cpp.

References CHECK.

1852 : node_(node) { CHECK(node_); }

anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor::node_

RelProject * node_

Definition: RelAlgDagBuilder.cpp:1871

CHECK

#define CHECK(condition)

Definition: Logger.h:197

Member Function Documentation

◆ visitInput()

RetType anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor::visitInput ( const RexInput * rex_input ) const

inlinefinalprotectedvirtual

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

Definition at line 1855 of file RelAlgDagBuilder.cpp.

                                                             {
     if (rex_input->getSourceNode() != node_) {
       const auto cur_index = rex_input->getIndex();
       auto cur_source_node = rex_input->getSourceNode();
       std::string field_name = "";
       if (auto cur_project_node = dynamic_cast<const RelProject*>(cur_source_node)) {
         field_name = cur_project_node->getFieldName(cur_index);
       }
       node_->appendInput(field_name, rex_input->deepCopy());
       return std::make_unique<RexInput>(node_, node_->size() - 1);
     } else {
       return rex_input->deepCopy();
     }
   }

Member Data Documentation

◆ node_

RelProject* anonymous_namespace{RelAlgDagBuilder.cpp}::RexInputBackpropagationVisitor::node_

mutableprivate

Definition at line 1871 of file RelAlgDagBuilder.cpp.

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

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

Public Member Functions

Protected Member Functions

Private Attributes