#include <blockNLJ.h>

Inheritance diagram for BlockNLJ:

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Collaboration diagram for BlockNLJ:

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Public Member Functions
	BlockNLJ (FileId outer_id, FileId inner_id, FileId result_id, std::vector< FieldId > outer_fields, std::vector< FieldId > inner_fields, std::uint32_t block_size, Catalog *catalog)
	Performs join operation using the block nested loop join algorithm.

	~BlockNLJ ()
	Destructor for TupleNLJ. Deletes dynamic member variables.

void	runOperation ()
	Runs the operation.

Public Member Functions inherited from Join
	Join (FileId outer_id, FileId inner_id, FileId result_id, std::vector< FieldId > outer_fields, std::vector< FieldId > inner_fields, Catalog *catalog)
	Constructor for Join operation. Join subclasses use this constructor.

	~Join ()
	Destructor for the Join Operation.

Public Member Functions inherited from Operation
	Operation (FileId result_id, Catalog *catalog)
	Constructor for the Operation class. Because Operation is an abstract class, an object cannot be created, but this constructor is used by derived classes.

virtual	~Operation ()
	Destructor for the Operation class. Cleans up dynamic memory in result state.

Protected Attributes
std::uint32_t	block_size

Protected Attributes inherited from Join
fileState	outer

fileState	inner

std::vector< FieldId >	outer_fields

std::vector< FieldId >	inner_fields

Protected Attributes inherited from Operation
fileState	result_state

Catalog *	catalog

Additional Inherited Members
Protected Member Functions inherited from Operation
void	_initState (FileId file_id, std::vector< FieldId > fields, fileState *state)
	Performs the file and temporary record setup for relational operators.

void	_delState (fileState *file_state)
	Deletes objects created in relop structs.

Detailed Description

BlockNLJ implements the block nested loop join functionality.

Constructor & Destructor Documentation

Performs join operation using the block nested loop join algorithm.

Precondition: Input result file is empty. The types of the fields being joined on
have the same type. The parameters are valid.

Postcondition: The result file is filled with the records that match the condition of the select.

Parameters

outer_id.	FileId of the outer relation file.
inner_id.	FileId of the inner relation file.
result_file	File * pointing to an empty file which will be filled with the tuples that satisfy the comparision
outer_fields.	vector of FieldIds corresponding to the join fields in outer_rel
inner_fields.	vector of FieldIds corresponding to the join fields in inner_rel
block_size.	std::uint32_t size of block.

void BlockNLJ::runOperation ( )

virtual

Runs the operation.

Precondition: Valid files and parameters have been passed to the contructor.

Postcondition: Result file has been populated with records that meet the criteria of the operation.

Implements Operation.

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