private static ICollection <Pair <IExpression, IAstNode> > GetExpressionSet(ColumnValueType map, object value)
{
if (map == null || map.IsEmpty())
{
return(new HashSet <Pair <IExpression, IAstNode> >());
}
var set = map.GetValue(value);
return(set ?? new HashSet <Pair <IExpression, IAstNode> >());
}
private void AddIntoColumnValueIndex(ColumnValueType valMap,
object value,
IExpression expr,
IAstNode parent)
{
var exprSet = value == null ? null : valMap.GetValue(value);
if (exprSet == null)
{
exprSet = new HashSet <Pair <IExpression, IAstNode> >();
valMap[value ?? Null_Alias_Key] = exprSet;
}
var pair = new Pair <IExpression, IAstNode>(expr, parent);
exprSet.Add(pair);
}