Ejemplo n.º 1
0
        protected override Expression VisitUpdate(UpdateCommand update)
        {
            this.Write("UPDATE ");
            this.WriteTableName(update.Table.Name);
            this.WriteLine(Indentation.Same);
            bool hideColumnAliases = this.HideColumnAliases;

            this.HideColumnAliases = true;
            this.Write("SET ");
            int num   = 0;
            int count = update.Assignments.Count;

            while (num < count)
            {
                ColumnAssignment assignment = update.Assignments[num];
                if (num > 0)
                {
                    this.Write(", ");
                }
                this.Visit(assignment.Column);
                this.Write(" = ");
                this.Visit(assignment.Expression);
                num++;
            }
            if (update.Where != null)
            {
                this.WriteLine(Indentation.Same);
                this.Write("WHERE ");
                this.VisitPredicate(update.Where);
            }
            this.HideColumnAliases = hideColumnAliases;
            return(update);
        }
Ejemplo n.º 2
0
        protected virtual ColumnAssignment VisitColumnAssignment(ColumnAssignment ca)
        {
            ColumnExpression c = (ColumnExpression)this.Visit(ca.Column);
            Expression       e = this.Visit(ca.Expression);

            return(this.UpdateColumnAssignment(ca, c, e));
        }
Ejemplo n.º 3
0
        protected virtual ReadOnlyCollection <ColumnAssignment> VisitColumnAssignments(ReadOnlyCollection <ColumnAssignment> assignments)
        {
            List <ColumnAssignment> list = null;
            int count = 0;
            int num2  = assignments.Count;

            while (count < num2)
            {
                ColumnAssignment item = this.VisitColumnAssignment(assignments[count]);
                if ((list == null) && (item != assignments[count]))
                {
                    list = assignments.Take <ColumnAssignment>(count).ToList <ColumnAssignment>();
                }
                if (list != null)
                {
                    list.Add(item);
                }
                count++;
            }
            if (list != null)
            {
                return(list.AsReadOnly());
            }
            return(assignments);
        }
Ejemplo n.º 4
0
 protected ColumnAssignment UpdateColumnAssignment(ColumnAssignment ca, ColumnExpression c, Expression e)
 {
     if ((c != ca.Column) || (e != ca.Expression))
     {
         return(new ColumnAssignment(c, e));
     }
     return(ca);
 }
Ejemplo n.º 5
0
        protected override ColumnAssignment VisitColumnAssignment(ColumnAssignment ca)
        {
            ca = base.VisitColumnAssignment(ca);
            Expression           e           = ca.Expression;
            NamedValueExpression expression2 = e as NamedValueExpression;

            if (expression2 != null)
            {
                e = new NamedValueExpression(expression2.Name, ca.Column.QueryType, expression2.Value);
            }
            return(base.UpdateColumnAssignment(ca, ca.Column, e));
        }