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anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor Class Reference
+ Inheritance diagram for anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor:
+ Collaboration diagram for anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor:

Public Member Functions

bool visitInput (const RexInput *input) const final
bool visitLiteral (const RexLiteral *) const final
bool visitSubQuery (const RexSubQuery *) const final
bool visitRef (const RexRef *) const final
- Public Member Functions inherited from RexVisitor< bool >
bool visitInput (const RexInput *) const override
bool visitLiteral (const RexLiteral *) const override
bool visitSubQuery (const RexSubQuery *) const override
bool visitRef (const RexRef *) const override
bool visitOperator (const RexOperator *rex_operator) const override
bool visitCase (const RexCase *rex_case) const override
- Public Member Functions inherited from RexVisitorBase< bool >
virtual bool visit (const RexScalar *rex_scalar) const

Protected Member Functions

bool aggregateResult (const bool &aggregate, const bool &next_result) const final
bool defaultResult () const final
- Protected Member Functions inherited from RexVisitor< bool >
bool defaultResult () const override

Detailed Description

CoalesceSecondaryProjectVisitor visits each relational algebra expression node in a given input and determines whether or not the input is a candidate for coalescing into the parent RA node. Intended for use only on the inputs of a RelProject node.

Definition at line 1827 of file RelAlgDag.cpp.

Member Function Documentation

bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::aggregateResult ( const bool &  aggregate,
const bool &  next_result 
) const

Reimplemented from RexVisitor< bool >.

Definition at line 1843 of file RelAlgDag.cpp.

1843  {
1844  return aggregate && next_result;
1845  }
bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::defaultResult ( ) const

Implements RexVisitorBase< bool >.

Definition at line 1847 of file RelAlgDag.cpp.

1847 { return true; }
bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::visitInput ( const RexInput input) const

Implements RexVisitorBase< bool >.

Definition at line 1829 of file RelAlgDag.cpp.

References anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::input_can_be_coalesced().

1829  {
1830  // The top level expression node is checked before we apply the visitor. If we get
1831  // here, this input rex is a child of another rex node, and we handle the can be
1832  // coalesced check slightly differently
1833  return input_can_be_coalesced(input->getSourceNode(), input->getIndex(), false);
1834  }
bool input_can_be_coalesced(const RelAlgNode *parent_node, const size_t index, const bool first_rex_is_input)
Definition: RelAlgDag.cpp:1806
unsigned getIndex() const
Definition: RelAlgDag.h:72
const RelAlgNode * getSourceNode() const
Definition: RelAlgDag.h:351

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bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::visitLiteral ( const RexLiteral ) const

Implements RexVisitorBase< bool >.

Definition at line 1836 of file RelAlgDag.cpp.

1836 { return false; }
bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::visitRef ( const RexRef ) const

Implements RexVisitorBase< bool >.

Definition at line 1840 of file RelAlgDag.cpp.

1840 { return false; }
bool anonymous_namespace{RelAlgDag.cpp}::anonymous_namespace{RelAlgDag.cpp}::CoalesceSecondaryProjectVisitor::visitSubQuery ( const RexSubQuery ) const

Implements RexVisitorBase< bool >.

Definition at line 1838 of file RelAlgDag.cpp.

1838 { return false; }

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