public override SqlObject VisitOrder_by_item([NotNull] sqlParser.Order_by_itemContext context)
{
Contract.Requires(context != null);
SqlScalarExpression expression = (SqlScalarExpression)this.Visit(context.scalar_expression());
bool isDescending = false;
if (context.sort_order() != null)
{
if (context.sort_order().K_ASC() != null)
{
isDescending = false;
}
else if (context.sort_order().K_DESC() != null)
{
isDescending = true;
}
else
{
throw new ArgumentOutOfRangeException($"Unknown sort order : {context.sort_order()}.");
}
}
return(SqlOrderByItem.Create(expression, isDescending));
}
/// <summary>
/// Visit a parse tree produced by <see cref="sqlParser.order_by_item"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitOrder_by_item([NotNull] sqlParser.Order_by_itemContext context)
{
return(VisitChildren(context));
}
public override SqlObject VisitOrder_by_item([NotNull] sqlParser.Order_by_itemContext context)
{
throw new NotSupportedException();
}
/// <summary>
/// Exit a parse tree produced by <see cref="sqlParser.order_by_item"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitOrder_by_item([NotNull] sqlParser.Order_by_itemContext context)
{
}
