protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var sequence = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
var take = 0;
if (!buildInfo.IsSubQuery || builder.DataContextInfo.SqlProviderFlags.IsSubQueryTakeSupported)
{
switch (methodCall.Method.Name)
{
case "First":
case "FirstOrDefault":
take = 1;
break;
case "Single":
case "SingleOrDefault":
if (!buildInfo.IsSubQuery)
{
{
var takeValue = buildInfo.SelectQuery.Select.TakeValue as SqlValue;
if (takeValue != null && (int)takeValue.Value >= 2)
{
take = 2;
}
}
}
break;
}
}
if (take != 0)
{
builder.BuildTake(sequence, new SqlValue(take));
}
return(new FirstSingleContext(buildInfo.Parent, sequence, methodCall));
}