TupleProjection Class Reference

A TupleProjection specifies a projection of a tuple, as explained in the design docs. More...

#include <TupleDescriptor.h>

Inheritance diagram for TupleProjection:

List of all members.

Public Member Functions
void	writePersistent (ByteOutputStream &) const
void	readPersistent (ByteInputStream &)
void	projectFrom (TupleProjection const &sourceProjection, TupleProjection const &tupleProjection)

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Detailed Description

A TupleProjection specifies a projection of a tuple, as explained in the design docs.

Definition at line 62 of file TupleDescriptor.h.

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Member Function Documentation

void TupleProjection::writePersistent

(

ByteOutputStream &

)

const

Definition at line 238 of file TupleDescriptor.cpp.

References ByteOutputStream::writeValue().

Referenced by FtrsTableWriter::describeIndex(), FtrsTableWriter::describeParticipant(), and BTreeWriter::describeParticipant().

{
    uint32_t iData = htonl(size());
    stream.writeValue(iData);
    for (uint i = 0; i < size(); ++i) {
        iData = htonl((*this)[i]);
        stream.writeValue(iData);
    }
}

void TupleProjection::readPersistent

(

ByteInputStream &

)

Definition at line 249 of file TupleDescriptor.cpp.

References ByteInputStream::readValue().

Referenced by FtrsTableWriterFactory::loadIndex(), FtrsTableWriterFactory::loadParticipant(), and BTreeRecoveryFactory::loadParticipant().

{
    clear();
    uint32_t n;
    stream.readValue(n);
    n = ntohl(n);
    for (uint i = 0; i < n; ++i) {
        uint32_t iData;
        stream.readValue(iData);
        push_back(ntohl(iData));
    }
}

void TupleProjection::projectFrom	(	TupleProjection const &	sourceProjection,
		TupleProjection const &	tupleProjection
	)

Definition at line 263 of file TupleDescriptor.cpp.

Referenced by LhxJoinExecStream::setHashInfo().

{
    clear();
    for (uint i = 0; i < tupleProjection.size(); ++i) {
        push_back(sourceProjection[tupleProjection[i]]);
    }
}

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

• /home/pub/open/dev/fennel/tuple/TupleDescriptor.h
• /home/pub/open/dev/fennel/tuple/TupleDescriptor.cpp

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