SqlField RegisterCteField(ISqlExpression baseExpression, [NotNull] ISqlExpression expression, int index, string alias)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
var cteField = _cte.RegisterFieldMapping(baseExpression, expression, index, () =>
{
var f = QueryHelper.GetUnderlyingField(baseExpression ?? expression);
var newField = f == null
? new SqlField {
SystemType = expression.SystemType, CanBeNull = expression.CanBeNull, Name = alias
}
: new SqlField(f);
newField.PhysicalName = newField.Name;
return(newField);
});
if (!SqlTable.Fields.TryGetValue(cteField.Name, out var field))
{
field = new SqlField(cteField);
SqlTable.Add(field);
}
return(field);
}