public override void VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
{
Log("VisitSelectClause: " + selectClause, logLevel++);
_queryParts.SelectPart = SqlExpressionTreeVisitor.GetSqlExpression(selectClause.Selector, ",");
base.VisitSelectClause(selectClause, queryModel);
logLevel--;
}
public override void VisitWhereClause(WhereClause whereClause, QueryModel queryModel, int index)
{
Log($"VisitWhereClause({index}): " + whereClause, logLevel++);
_queryParts.AddWherePart(SqlExpressionTreeVisitor.GetSqlExpression(whereClause.Predicate));
base.VisitWhereClause(whereClause, queryModel, index);
logLevel--;
}
public override void VisitOrderByClause(OrderByClause orderByClause, QueryModel queryModel, int index)
{
Log($"VisitOrderByClause({index}): " + orderByClause, logLevel++);
var orderings = orderByClause.Orderings;
_queryParts.AddOrderByPart(orderings.Select(item => SqlExpressionTreeVisitor.GetSqlExpression(item.Expression) + " " + item.OrderingDirection));
base.VisitOrderByClause(orderByClause, queryModel, index);
logLevel--;
}
private string GetFilter(JoinClause joinClause, string newItemName = null)
{
//TODO
var filter = $"({SqlExpressionTreeVisitor.GetSqlExpression(joinClause.OuterKeySelector)} = {SqlExpressionTreeVisitor.GetSqlExpression(joinClause.InnerKeySelector)})";
if (newItemName != null)
{
filter = filter.Replace($"\"{joinClause.ItemName}\".", $"\"{newItemName}\".");
}
return(filter);
}
public static string GetSqlExpression(Expression exp, string separator = "")
{
var visitor = new SqlExpressionTreeVisitor(separator);
visitor.Visit(exp);
var str = visitor.sql.ToString();
if (separator.Length > 0 && str.Length > 0)
{
str = str.Remove(str.Length - separator.Length);
}
return(str);
}
