GenericQuery::GenericDataGenerator Class Reference

#include <GenericGenerator.h>

Inheritance diagram for GenericQuery::GenericDataGenerator:

Collaboration diagram for GenericQuery::GenericDataGenerator:

Classes
struct	DataGeneraterJoin
	helper structure to efficiently process joins More...

Public Member Functions
	GenericDataGenerator (GenericQueryBuilder builder)
	Construct a new Generic Data Generator object. More...
bool	hasNext ()
	check if a record is available More...
DataRecord	next ()
	generates a new record More...
Public Member Functions inherited from ColumnStore::DataGeneratorInterface
Metadata	getMetadata () const
	Interface for relational data sources. More...
virtual std::vector< DataRecord >	nextBatch (int batchSize)
	Helper function to return batch of records. More...
void	print (int recordCount=-1)
	Print the data. More...
virtual	~DataGeneratorInterface ()
	Destroy the Data Generator Interface object. More...

Private Member Functions
DataRecord	_getNext ()
	internal function to process and generate next valid record More...
void	_setNext ()
	internal function to set the next valid record More...
DataRecord	_getCandidateNext ()
	Gets the next candidate record. More...

Private Attributes
GenericQueryBuilder	builder
	builder object from which we are generating data More...
RecordValidator	recordValidator
DataSource	baseSource
std::vector< int >	baseIndices
	List of column indices to extract values from base source records. More...
bool	_hasNext = false
DataRecord	nextRecord
std::vector< DataGeneraterJoin >	joins
	List of joins. More...

Additional Inherited Members
Protected Attributes inherited from ColumnStore::DataGeneratorInterface
Metadata	metadata
	metadata for processing queries More...

Constructor & Destructor Documentation

GenericDataGenerator()

GenericQuery::GenericDataGenerator::GenericDataGenerator

(

GenericQueryBuilder

builder

)

Construct a new Generic Data Generator object.

The generator processes all column data and maps it to column indices for efficiency. All joined data sources are loaded into memory in the constructor

Parameters

builder

object to constuct generator from

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Member Function Documentation

_getCandidateNext()

DataRecord GenericQuery::GenericDataGenerator::_getCandidateNext ( )

private

Gets the next candidate record.

Gets the next record from base source. Applies join on the join map data. This function does not perform record validation.

Returns

DataRecord

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_getNext()

DataRecord GenericQuery::GenericDataGenerator::_getNext ( )

private

internal function to process and generate next valid record

Returns

DataRecord

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_setNext()

void GenericQuery::GenericDataGenerator::_setNext ( )

private

internal function to set the next valid record

If no valid record is found, it sets _hasNext to false

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hasNext()

bool GenericQuery::GenericDataGenerator::hasNext ( )

virtual

check if a record is available

Returns

true

false

Implements ColumnStore::DataGeneratorInterface.

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next()

DataRecord GenericQuery::GenericDataGenerator::next ( )

virtual

generates a new record

Returns

DataRecord

Implements ColumnStore::DataGeneratorInterface.

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Member Data Documentation

_hasNext

bool GenericQuery::GenericDataGenerator::_hasNext = false

private

baseIndices

std::vector<int> GenericQuery::GenericDataGenerator::baseIndices

private

List of column indices to extract values from base source records.

baseSource

DataSource GenericQuery::GenericDataGenerator::baseSource

private

builder

GenericQueryBuilder GenericQuery::GenericDataGenerator::builder

private

builder object from which we are generating data

joins

std::vector<DataGeneraterJoin> GenericQuery::GenericDataGenerator::joins

private

List of joins.

nextRecord

DataRecord GenericQuery::GenericDataGenerator::nextRecord

private

recordValidator

RecordValidator GenericQuery::GenericDataGenerator::recordValidator

private

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

• src/GenericQuery/GenericGenerator.h
• src/GenericQuery/GenericGenerator.cpp