void SetSubIndex <T>(ExpressionParserOld <T> parser)
{
if (_subIndex == null)
{
_subIndex = Field.Select(parser);
for (var i = 0; i < _subIndex.Length; i++)
{
var idx = _subIndex[i];
var f = QuerySource.BaseQuery.GetField(idx.Field);
if (f != null && f != idx.Field)
{
var idxs = f.Select(parser);
if (idxs.Length == 1)
{
_subIndex[i] = idxs[0];
}
}
}
if (QuerySource.SubSql.HasUnion)
{
var sub = QuerySource.BaseQuery;
var idx = sub.Fields.IndexOf(Field);
var mi = sub.GetMember(Field);
foreach (var union in QuerySource.Unions)
{
if (mi != null)
{
var f = union.GetField(mi, _ => _ is QuerySource);
if (f != null)
{
f.Select(parser);
continue;
}
if (union is QuerySource.Expr)
{
union.SqlQuery.Select.Add(new SqlValue(null));
continue;
}
}
union.Fields[idx].Select(parser);
}
}
}
}
//ISqlExpression _sqlExpression;
public override FieldIndex[] Select <T>(ExpressionParserOld <T> parser)
{
if (_index == null)
{
var idx = _queryField.Select(parser);
var expr = idx[0].Field.GetExpressions(parser);
_index = new[] { new FieldIndex {
Index = _querySource.SqlQuery.Select.Add(expr[0]), Field = this
} };
}
return(_index);
}
void SetSubIndex <T>(ExpressionParser <T> parser)
{
if (_subIndex == null)
{
_subIndex = Field.Select(parser);
if (QuerySource.SubSql.HasUnion)
{
var sub = QuerySource.BaseQuery;
var idx = sub.Fields.IndexOf(Field);
var mi = sub.GetMember(Field);
foreach (var union in QuerySource.Unions)
{
if (mi != null)
{
var f = union.GetField(mi);
if (f != null)
{
f.Select(parser);
continue;
}
if (union is QuerySource.Expr)
{
union.SqlQuery.Select.Add(new SqlValue(null));
continue;
}
}
union.Fields[idx].Select(parser);
}
}
}
}