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anonymous_namespace{RelAlgAbstractInterpreter.cpp}::WindowFunctionDetectionVisitor Class Reference
+ Inheritance diagram for anonymous_namespace{RelAlgAbstractInterpreter.cpp}::WindowFunctionDetectionVisitor:
+ Collaboration diagram for anonymous_namespace{RelAlgAbstractInterpreter.cpp}::WindowFunctionDetectionVisitor:

Protected Member Functions

const RexScalarvisitOperator (const RexOperator *rex_operator) const final
 
const RexScalarvisitCase (const RexCase *rex_case) const final
 
const RexScalaraggregateResult (const RexScalar *const &aggregate, const RexScalar *const &next_result) const final
 
const RexScalardefaultResult () const final
 
- Protected Member Functions inherited from RexVisitor< const RexScalar * >
const RexScalardefaultResult () const override
 

Additional Inherited Members

- Public Member Functions inherited from RexVisitor< const RexScalar * >
const RexScalarvisitInput (const RexInput *) const override
 
const RexScalarvisitLiteral (const RexLiteral *) const override
 
const RexScalarvisitSubQuery (const RexSubQuery *) const override
 
const RexScalarvisitRef (const RexRef *) const override
 
const RexScalarvisitOperator (const RexOperator *rex_operator) const override
 
const RexScalarvisitCase (const RexCase *rex_case) const override
 
- Public Member Functions inherited from RexVisitorBase< const RexScalar * >
virtual const RexScalarvisit (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 1397 of file RelAlgAbstractInterpreter.cpp.

Member Function Documentation

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

Reimplemented from RexVisitor< const RexScalar * >.

Definition at line 1451 of file RelAlgAbstractInterpreter.cpp.

References UNREACHABLE.

1452  {
1453  // all methods calling aggregate result should be overriden
1454  UNREACHABLE();
1455  return nullptr;
1456  }
#define UNREACHABLE()
Definition: Logger.h:231
const RexScalar* anonymous_namespace{RelAlgAbstractInterpreter.cpp}::WindowFunctionDetectionVisitor::defaultResult ( ) const
inlinefinalprotectedvirtual

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1458 of file RelAlgAbstractInterpreter.cpp.

1458 { return nullptr; }
const RexScalar* anonymous_namespace{RelAlgAbstractInterpreter.cpp}::WindowFunctionDetectionVisitor::visitCase ( const RexCase rex_case) const
inlinefinalprotectedvirtual

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1426 of file RelAlgAbstractInterpreter.cpp.

References RexCase::branchCount(), RexCase::getElse(), RexCase::getThen(), RexCase::getWhen(), anonymous_namespace{RelAlgAbstractInterpreter.cpp}::anonymous_namespace{RelAlgAbstractInterpreter.cpp}::is_window_function_operator(), and run-benchmark-import::result.

1426  {
1427  if (is_window_function_operator(rex_case)) {
1428  return rex_case;
1429  }
1430 
1431  auto result = defaultResult();
1432  for (size_t i = 0; i < rex_case->branchCount(); ++i) {
1433  const auto when = rex_case->getWhen(i);
1434  result = is_window_function_operator(when) ? when : visit(when);
1435  if (result) {
1436  return result;
1437  }
1438  const auto then = rex_case->getThen(i);
1439  result = is_window_function_operator(then) ? then : visit(then);
1440  if (result) {
1441  return result;
1442  }
1443  }
1444  if (rex_case->getElse()) {
1445  auto else_expr = rex_case->getElse();
1446  result = is_window_function_operator(else_expr) ? else_expr : visit(else_expr);
1447  }
1448  return result;
1449  }
const RexScalar * getThen(const size_t idx) const
const RexScalar * getElse() const
const RexScalar * getWhen(const size_t idx) const
virtual const RexScalar * visit(const RexScalar *rex_scalar) const
Definition: RexVisitor.h:27
size_t branchCount() const

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

Implements RexVisitorBase< const RexScalar * >.

Definition at line 1400 of file RelAlgAbstractInterpreter.cpp.

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

1400  {
1401  if (is_window_function_operator(rex_operator)) {
1402  return rex_operator;
1403  }
1404 
1405  const size_t operand_count = rex_operator->size();
1406  for (size_t i = 0; i < operand_count; ++i) {
1407  const auto operand = rex_operator->getOperand(i);
1408  if (is_window_function_operator(operand)) {
1409  // Handle both RexWindowFunctionOperators and window functions built up from
1410  // multiple RexScalar objects (e.g. AVG)
1411  return operand;
1412  }
1413  const auto operandResult = visit(operand);
1414  if (operandResult) {
1415  return operandResult;
1416  }
1417  }
1418 
1419  return defaultResult();
1420  }
size_t size() const
const RexScalar * getOperand(const size_t idx) const
virtual const RexScalar * visit(const RexScalar *rex_scalar) const
Definition: RexVisitor.h:27

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