// LCOV_EXCL_START - cnu
CostScalar
TableDesc::getBaseRowCntIfUniqueJoinCol(const ValueIdSet &joinedCols)
{
// get the joining columns for this table
ValueIdList userColumns;
// get All user columns for this table;
getUserColumnList(userColumns);
ValueIdSet userColumnSet(userColumns);
ValueIdSet joinedColsCopy(joinedCols);
ValueIdSet thisTableJoinCols = joinedColsCopy.intersect(userColumnSet);
if (thisTableJoinCols.isEmpty() )
return csMinusOne;
CostScalar baseRowCount = csMinusOne;
if (thisTableJoinCols.doColumnsConstituteUniqueIndex(this) )
baseRowCount = tableColStats()[0]->getColStats()->getRowcount();
return baseRowCount;
} // TableDesc::getBaseRowCntIfUniqueJoinCol
