ColumnStore::DataGeneratorInterface Class Reference

Interface for relational data sources. More...

#include <DataGeneratorInterface.h>

Inheritance diagram for ColumnStore::DataGeneratorInterface:

Collaboration diagram for ColumnStore::DataGeneratorInterface:

Public Member Functions
virtual DataRecord	next ()=0
virtual bool	hasNext ()=0
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...

Protected Attributes
Metadata	metadata
	metadata for processing queries More...

Detailed Description

Interface for relational data sources.

Designed as a generator exposing interfaces next() and hasNext(). All data sources should comply to this interface.

See also

GenericQueryBuilder

GenericDataGenerator

Constructor & Destructor Documentation

~DataGeneratorInterface()

virtual ColumnStore::DataGeneratorInterface::~DataGeneratorInterface ( )

inlinevirtual

Destroy the Data Generator Interface object.

Member Function Documentation

getMetadata()

Metadata ColumnStore::DataGeneratorInterface::getMetadata

(

)

const

Interface for relational data sources.

Returns

Metadata

See also

DataRecordMetadata

Designed as a generator exposing interfaces next() and hasNext(). All data sources should comply to this interface.

See also

GenericQueryBuilder

GenericDataGenerator

Returns

Metadata

See also

DataRecordMetadata

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hasNext()

virtual bool ColumnStore::DataGeneratorInterface::hasNext ( )

pure virtual

Returns

returns true if record can be generated

Implemented in GenericQuery::GenericGroupByAggregator, Postgres::PostgreSQLDataSource, GenericQuery::GenericDataAggregator, GenericQuery::GenericDataGenerator, CSV::CSVDataSource, and ColumnStore::ColStoreDataSource.

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next()

virtual DataRecord ColumnStore::DataGeneratorInterface::next ( )

pure virtual

Returns

next record

Implemented in GenericQuery::GenericGroupByAggregator, GenericQuery::GenericDataAggregator, Postgres::PostgreSQLDataSource, GenericQuery::GenericDataGenerator, CSV::CSVDataSource, and ColumnStore::ColStoreDataSource.

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nextBatch()

std::vector< DataRecord > ColumnStore::DataGeneratorInterface::nextBatch ( int  records )

virtual

Helper function to return batch of records.

Intended to be used for batch processing.

Returns

batch of records

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print()

void ColumnStore::DataGeneratorInterface::print

(

int

recordCount = -1

)

Print the data.

Pretty print the relational data in a tabular form with column names

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Member Data Documentation

metadata

Metadata ColumnStore::DataGeneratorInterface::metadata

protected

metadata for processing queries

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

• src/interfaces/DataGeneratorInterface.h
• src/interfaces/DataGeneratorInterface.cpp