private int GetMaxSize(Relation relation, AttributeDefinition definition)
{
return(GetStatistics(relation.Id).ColumnStatistics[definition.Name].MaxSize);
}
internal bool Joins(CustomTuple rightTuple, AttributeDefinition leftJoinColumn, AttributeDefinition rightJoinColumn)
{
CustomObject left = GetEntryFor(leftJoinColumn.Name);
CustomObject right = rightTuple.GetEntryFor(rightJoinColumn.Name);
if (left.IsEqualTo(right))
{
return(true);
}
return(false);
}
public int V(TableDefinition tableDefinition, AttributeDefinition column)
{
return(_statisticsPerRelation[tableDefinition.Id].ColumnStatistics[column.Name].DistinctValuesCount);
}
public CustomObject GetEntryFor(AttributeDefinition column)
{
return(Entries.First(x => x.AttributeDefinition == column));
}