A relational algebra query. More...

#include <Query.h>

Inheritance diagram for souffle::ram::Query:

Collaboration diagram for souffle::ram::Query:

Public Member Functions
void	apply (const NodeMapper &map) override
	Apply the mapper to all child nodes. More...

Query *	clone () const override
	Create a clone (i.e. More...

std::vector< const Node * >	getChildNodes () const override
	Obtain list of all embedded child nodes. More...

const Operation &	getOperation () const
	Get RAM operation. More...

	Query (Own< Operation > o)

Public Member Functions inherited from souffle::ram::Node
bool	operator!= (const Node &other) const
	Inequality check for two RAM nodes. More...

bool	operator== (const Node &other) const
	Equivalence check for two RAM nodes. More...

virtual void	rewrite (const Node *oldNode, Own< Node > newNode)
	Rewrite a child node. More...

virtual	~Node ()=default

Protected Member Functions
bool	equal (const Node &node) const override
	Equality check for two RAM nodes. More...

void	print (std::ostream &os, int tabpos) const override
	Pretty print with indentation. More...

Protected Member Functions inherited from souffle::ram::Statement
void	print (std::ostream &os) const override
	Print RAM node. More...

Protected Attributes
Own< Operation >	operation
	RAM operation. More...

Additional Inherited Members
Static Protected Member Functions inherited from souffle::ram::Statement
static void	print (const Statement *statement, std::ostream &os, int tabpos)
	Pretty print jump-bed. More...

Detailed Description

A relational algebra query.

Corresponds to the core machinery of semi-naive evaluation

For example:

QUERY
  FOR t0 in A
    FOR t1 in B
      ...

Definition at line 50 of file Query.h.

Constructor & Destructor Documentation

◆ Query()

souffle::ram::Query::Query ( Own< Operation > o )

inline

Definition at line 52 of file Query.h.

53 {

54 return *operation;

References operation.

Referenced by getChildNodes().

Member Function Documentation

◆ apply()

void souffle::ram::Query::apply ( const NodeMapper & )

inlineoverridevirtual

Apply the mapper to all child nodes.

Reimplemented from souffle::ram::Node.

Definition at line 69 of file Query.h.

          :
     void print(std::ostream& os, int tabpos) const override {
         os << times(" ", tabpos) << "QUERY" << std::endl;

References operation, and souffle::times().

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◆ clone()

Query* souffle::ram::Query::clone ( ) const

inlineoverridevirtual

Create a clone (i.e.

deep copy) of this node

Implements souffle::ram::Statement.

Definition at line 65 of file Query.h.

                                                {
         operation = map(std::move(operation));
     }

References souffle::map(), and operation.

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◆ equal()

bool souffle::ram::Query::equal ( const Node & ) const

inlineoverrideprotectedvirtual

Equality check for two RAM nodes.

Default action is that nothing needs to be checked.

Reimplemented from souffle::ram::Node.

Definition at line 79 of file Query.h.

◆ getChildNodes()

std::vector<const Node*> souffle::ram::Query::getChildNodes ( ) const

inlineoverridevirtual

Obtain list of all embedded child nodes.

Reimplemented from souffle::ram::Node.

Definition at line 61 of file Query.h.

                                   {
         return new Query(souffle::clone(operation));
     }

References souffle::clone(), operation, and Query().

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◆ getOperation()

const Operation& souffle::ram::Query::getOperation ( ) const

inline

Get RAM operation.

Definition at line 57 of file Query.h.

                                                           {
         return {operation.get()};
     }

References operation.

Referenced by souffle::ram::transform::HoistAggregateTransformer::hoistAggregate().

◆ print()

void souffle::ram::Query::print	(	std::ostream &	os,
		int	tabpos
	)		const

inlineoverrideprotectedvirtual

Pretty print with indentation.

Implements souffle::ram::Statement.

Definition at line 74 of file Query.h.

                                                 {
         const auto& other = static_cast<const Query&>(node);
         return equal_ptr(operation, other.operation);