Exemplos de CacheWA::replaceWithNewOrOldSelParam em C++ (Cpp)

Exemplo n.º 1

void computeAndAddSelParamIfPossible(
             CacheWA& cwa, BindWA& bindWA, ExprValueId& child,
             BaseColumn *base, ConstValue *val)
{
    ColStatsSharedPtr cStatsPtr = (base->getTableDesc()->tableColStats()).
                             getColStatsPtrForColumn(base->getValueId());

    if (cStatsPtr == NULL )
        return;

    HistogramSharedPtr hist = cStatsPtr->getHistogram();

    if ( hist == NULL )
       return;

    CostScalar sel;
    NABoolean canComputeSelectivity = hist -> computeSelectivityForEquality(
            val, cStatsPtr->getRowcount(), cStatsPtr->getTotalUec(),
            sel);

    if ( canComputeSelectivity == TRUE ) {
      const NAType * newType = base->getNAColumn()->getType();

      // for char datatypes, assign the caseinsensitive attribute from
      // the const node.
      if (newType->getTypeQualifier() == NA_CHARACTER_TYPE)
	{
	  newType = 
	    base->getNAColumn()->getType()->newCopy(cwa.wHeap());
	  ((CharType*)newType)->setCaseinsensitive(((CharType*)val->getType())->isCaseinsensitive());
	}
      
      cwa.replaceWithNewOrOldSelParam(val, newType, Selectivity(sel), 
                                      child, bindWA);

    }
}