protected override Expression VisitSubQuery(SubQueryExpression expression)
{
if (!HandleJoin && !HandleLet)
{
ModelVisitor.QueryText.Append(" ( ");
}
var visitor = new ArangoModelVisitor(ModelVisitor.Db);
if (HandleLet)
{
visitor.DefaultAssociatedIdentifier = QueryModel.MainFromClause.ItemName;
}
visitor.QueryText = ModelVisitor.QueryText;
visitor.ParnetModelVisitor = ModelVisitor;
visitor.IgnoreFromClause = HandleLet;
visitor.VisitQueryModel(expression.QueryModel);
if (!HandleJoin && !HandleLet)
{
ModelVisitor.QueryText.Append(" ) ");
}
return(expression);
}
public static List <GroupByClause> PriorGroupBy(ArangoModelVisitor modelVisitor)
{
List <GroupByClause> clauses = new List <GroupByClause>();
FindGroupByRecursive(modelVisitor, clauses);
return(clauses);
}
ICursor <T> GetCursor <T>(QueryModel queryModel)
{
var visitor = new ArangoModelVisitor(db);
visitor.VisitQueryModel(queryModel);
visitor.QueryData.Query = visitor.QueryText.ToString();
return(db.CreateStatement <T>(visitor.QueryData.Query,
bindVars: visitor.QueryData.BindVars));
}
public QueryData GetQueryData(Expression expression)
{
LinqUtility.CheckNotNull("expression", expression);
var queryModel = GenerateQueryModel(expression);
var visitor = new ArangoModelVisitor(db);
visitor.VisitQueryModel(queryModel);
visitor.QueryData.Query = visitor.QueryText.ToString();
return(visitor.QueryData);
}
public static ArangoModelVisitor FindParentModelVisitor(ArangoModelVisitor modelVisitor)
{
ArangoModelVisitor parentModelVisitor = modelVisitor;
do
{
if (parentModelVisitor.ParnetModelVisitor == null)
{
return(parentModelVisitor);
}
parentModelVisitor = parentModelVisitor.ParnetModelVisitor;
}while (true);
}
public static string MemberNameFromMap(string guid, string prefix, ArangoModelVisitor modelVisitor)
{
var mappings = FindParentModelVisitor(modelVisitor).MemberNamesMapping;
if (mappings.ContainsKey(guid))
{
return(mappings[guid]);
}
string memberName = $"{prefix}_{mappings.Count}";
mappings[guid] = memberName;
return(memberName);
}
static void FindGroupByRecursive(ArangoModelVisitor modelVisitor, List <GroupByClause> clauses)
{
if (modelVisitor == null)
{
return;
}
var groupByClauses = modelVisitor.QueryModel.BodyClauses.Where(x => x is GroupByClause).Select(x => x as GroupByClause).Where(x => x.Visited);
foreach (var g in groupByClauses)
{
clauses.Add(g);
if (!g.GroupOnLastGroup)
{
return;
}
}
FindGroupByRecursive(modelVisitor.ParnetModelVisitor, clauses);
}
public ArangoExpressionTreeVisitor(ArangoModelVisitor modelVisitor)
{
this.ModelVisitor = modelVisitor;
}