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

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

Protected Member Functions
const RexScalar *	visitOperator (const RexOperator *rex_operator) const final

const RexScalar *	visitCase (const RexCase *rex_case) const final

const RexScalar *	aggregateResult (const RexScalar const &aggregate, const RexScalar const &next_result) const final

const RexScalar *	defaultResult () const final

Protected Member Functions inherited from RexVisitor< const RexScalar * >
const RexScalar *	defaultResult () const override

Additional Inherited Members
Public Member Functions inherited from RexVisitor< const RexScalar * >
const RexScalar *	visitInput (const RexInput *) const override

const RexScalar *	visitLiteral (const RexLiteral *) const override

const RexScalar *	visitSubQuery (const RexSubQuery *) const override

const RexScalar *	visitRef (const RexRef *) const override

const RexScalar *	visitOperator (const RexOperator *rex_operator) const override

const RexScalar *	visitCase (const RexCase *rex_case) const override

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

Detailed Description

WindowFunctionDetectionVisitor detects the presence of embedded Window Function Rex Operators and returns a pointer to the WindowFunctionOperator. Only the first detected operator will be returned (e.g. a binary operator that is WindowFunc1 & WindowFunc2 would return a pointer to WindowFunc1). Neither the window function operator nor its parent expression are modified.

Definition at line 1488 of file RelAlgDagBuilder.cpp.

Member Function Documentation

const RexScalar* anonymous_namespace{RelAlgDagBuilder.cpp}::WindowFunctionDetectionVisitor::aggregateResult	(	const RexScalar *const &	aggregate,
		const RexScalar *const &	next_result
	)		const

inlinefinalprotectedvirtual

Reimplemented from RexVisitor< const RexScalar * >.

Definition at line 1542 of file RelAlgDagBuilder.cpp.

References UNREACHABLE.

                                                                                     {
     // all methods calling aggregate result should be overriden
     UNREACHABLE();
     return nullptr;
   }

const RexScalar* anonymous_namespace{RelAlgDagBuilder.cpp}::WindowFunctionDetectionVisitor::defaultResult ( ) const

inlinefinalprotectedvirtual

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1549 of file RelAlgDagBuilder.cpp.

1549 { return nullptr; }

const RexScalar* anonymous_namespace{RelAlgDagBuilder.cpp}::WindowFunctionDetectionVisitor::visitCase ( const RexCase * rex_case ) const

inlinefinalprotectedvirtual

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1517 of file RelAlgDagBuilder.cpp.

References RexCase::branchCount(), RexCase::getElse(), RexCase::getThen(), RexCase::getWhen(), anonymous_namespace{RelAlgDagBuilder.cpp}::anonymous_namespace{RelAlgDagBuilder.cpp}::is_window_function_operator(), and run_benchmark_import::result.

                                                                   {
     if (is_window_function_operator(rex_case)) {
       return rex_case;
     }
 
     auto result = defaultResult();
     for (size_t i = 0; i < rex_case->branchCount(); ++i) {
       const auto when = rex_case->getWhen(i);
       result = is_window_function_operator(when) ? when : visit(when);
       if (result) {
         return result;
       }
       const auto then = rex_case->getThen(i);
       result = is_window_function_operator(then) ? then : visit(then);
       if (result) {
         return result;
       }
     }
     if (rex_case->getElse()) {
       auto else_expr = rex_case->getElse();
       result = is_window_function_operator(else_expr) ? else_expr : visit(else_expr);
     }
     return result;
   }

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const RexScalar* anonymous_namespace{RelAlgDagBuilder.cpp}::WindowFunctionDetectionVisitor::visitOperator ( const RexOperator * rex_operator ) const

inlinefinalprotectedvirtual

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1491 of file RelAlgDagBuilder.cpp.

References anonymous_namespace{RelAlgDagBuilder.cpp}::anonymous_namespace{RelAlgDagBuilder.cpp}::is_window_function_operator().

                                                                               {
     if (is_window_function_operator(rex_operator)) {
       return rex_operator;
     }
 
     const size_t operand_count = rex_operator->size();
     for (size_t i = 0; i < operand_count; ++i) {
       const auto operand = rex_operator->getOperand(i);
       if (is_window_function_operator(operand)) {
         // Handle both RexWindowFunctionOperators and window functions built up from
         // multiple RexScalar objects (e.g. AVG)
         return operand;
       }
       const auto operandResult = visit(operand);
       if (operandResult) {
         return operandResult;
       }
     }
 
     return defaultResult();
   }

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

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

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation