ExternalSortSubStream Class Reference

Fetch interface implemented by sorter subcomponents which return intermediate results. More...

#include <ExternalSortSubStream.h>

Inheritance diagram for ExternalSortSubStream:

List of all members.

Public Member Functions
virtual	~ExternalSortSubStream ()
virtual ExternalSortFetchArray &	bindFetchArray ()=0
	Binds the fetch array which will be used implicitly by subsequent calls to fetch().
virtual ExternalSortRC	fetch (uint nTuplesRequested)=0
	Fetches tuples via the previously bound fetch array.

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Detailed Description

Fetch interface implemented by sorter subcomponents which return intermediate results.

Definition at line 58 of file ExternalSortSubStream.h.

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Constructor & Destructor Documentation

virtual ExternalSortSubStream::~ExternalSortSubStream

(

)

[inline, virtual]

Definition at line 61 of file ExternalSortSubStream.h.

    {
    }

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Member Function Documentation

virtual ExternalSortFetchArray& ExternalSortSubStream::bindFetchArray

(

)

[pure virtual]

Binds the fetch array which will be used implicitly by subsequent calls to fetch().

Returns:

bound fetch array

Implemented in ExternalSortMerger, ExternalSortRunAccessor, and ExternalSortRunLoader.

Referenced by ExternalSortOutput::setSubStream(), and ExternalSortRunAccessor::storeRun().

virtual ExternalSortRC ExternalSortSubStream::fetch

(

uint

nTuplesRequested

)

[pure virtual]

Fetches tuples via the previously bound fetch array.

Parameters:

nTuplesRequested

maximum number of tuples to be returned from fetch (actual count may be less at callee's discretion; this does not indicate end of stream)

Returns:

result of fetch (either EXTSORT_ENDOFDATA or EXTSORT_SUCCESS)

Implemented in ExternalSortMerger, ExternalSortRunAccessor, and ExternalSortRunLoader.

Referenced by ExternalSortOutput::fetch(), and ExternalSortRunAccessor::storeRun().

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

• /home/pub/open/dev/fennel/sorter/ExternalSortSubStream.h

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