protected override Expression VisitConstant(ConstantExpression expression)
{
var namedParameter = _parameterAggregator.AddParameter(expression.Value);
//TODO: ordering or named arguments?
_sqlExpression.Append($"{namedParameter.Name}");
return(expression);
}
public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
switch (resultOperator)
{
case FirstResultOperator _:
_queryParts.FetchPart = "FETCH ?";
_parameterAggregator.AddParameter(1);
break;
case CountResultOperator _:
_queryParts.SelectPart = string.Format($"cast(count({_queryParts.SelectPart}) as int)");
break;
default:
throw new NotSupportedException("Only Count() result operator is showcased in this sample. Adding Sum, Min, Max is left to the reader.");
}
base.VisitResultOperator(resultOperator, queryModel, index);
}