public override VfpExpression Visit(VfpInExpression expression)
{
const int convertToXmltocursorMintextLength = 200;
if (expression.List.Any(x => x.ExpressionKind != VfpExpressionKind.Constant))
{
return(base.Visit(expression));
}
var values = new StringBuilder(convertToXmltocursorMintextLength);
var array = expression.List.Cast <VfpConstantExpression>().Select(x => x.Value).Distinct().ToArray();
foreach (var item in array)
{
values.Append(item);
if (values.Length > convertToXmltocursorMintextLength)
{
break;
}
}
if (values.Length > convertToXmltocursorMintextLength)
{
_count++;
var arrayXmlToCursor = new ArrayXmlToCursor(array);
var xml = VfpExpressionBuilder.Constant(arrayXmlToCursor.Xml);
var parameter = VfpExpressionBuilder.Parameter(PrimitiveTypeKind.String.ToTypeUsage(), "@__XmlToCursor" + _count, xml);
var cursorName = "curXml" + _count;
var xmlToCursor = VfpExpressionBuilder.XmlToCursor(expression.Item, parameter, cursorName, arrayXmlToCursor.ItemType);
return(base.Visit(xmlToCursor));
}
return(base.Visit(expression));
}
public virtual VfpExpression Visit(VfpInExpression expression)
{
return(new VfpInExpression(expression.ResultType,
expression.Item.Accept(this),
VisitVfpExpressionList(expression.List)));
}
