|| || || || || || || ||

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MakeGroupIndex.h

Go to the documentation of this file.

#ifndef Impala_Core_Table_MakeGroupIndex_h
#define Impala_Core_Table_MakeGroupIndex_h

#include "Core/Table/GroupIndex.h"

namespace Impala
{
namespace Core
{
namespace Table
{


template <class C>
inline void
MakeGroupIndex(GroupIndex* table, C* column, int start, int end)
{
    table->SetEmpty();
    typename C::ColElemType elem = column->Get(start);
    int first = start;
    int nr = 1;
    for (int i=start+1 ; i<end ; i++)
    {
        if (column->Get(i) != elem)
        {
            table->Add(first, nr);
            elem = column->Get(i);
            first = i;
            nr = 1;
        }
        else
        {
            nr++;
        }
    }
    table->Add(first, nr);
}

} // namespace Table
} // namespace Core
} // namespace Impala

#endif

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