LinqtoSql Pre-compile Query problem with Count() on a group by
- by Joe Pitz
Have a LinqtoSql query that I now want to precompile.
var unorderedc =
from insp in sq.Inspections
where insp.TestTimeStamp > dStartTime && insp.TestTimeStamp < dEndTime
&& insp.Model == "EP" && insp.TestResults != "P"
group insp by new { insp.TestResults, insp.FailStep } into grp
select new
{
FailedCount = (grp.Key.TestResults == "F" ? grp.Count() : 0),
CancelCount = (grp.Key.TestResults == "C" ? grp.Count() : 0),
grp.Key.TestResults,
grp.Key.FailStep,
PercentFailed = Convert.ToDecimal(1.0 * grp.Count() / tcount * 100)
};
I have created this delegate:
public static readonly Funct<SQLDataDataContext, int, string, string, DateTime, DateTime, IQueryable<CalcFailedTestResult>>
GetInspData = CompiledQuery.Compile((SQLDataDataContext sq, int tcount, string strModel, string strTest, DateTime dStartTime,
DateTime dEndTime, IQueryable<CalcFailedTestResult> CalcFailed) =>
from insp in sq.Inspections
where insp.TestTimeStamp > dStartTime && insp.TestTimeStamp < dEndTime
&& insp.Model == strModel && insp.TestResults != strTest
group insp by new { insp.TestResults, insp.FailStep } into grp
select new
{
FailedCount = (grp.Key.TestResults == "F" ? grp.Count() : 0),
CancelCount = (grp.Key.TestResults == "C" ? grp.Count() : 0),
grp.Key.TestResults,
grp.Key.FailStep,
PercentFailed = Convert.ToDecimal(1.0 * grp.Count() / tcount * 100)
});
The syntax error is on the CompileQuery.Compile() statement
It appears to be related to the use of the select new {} syntax.
In other pre-compiled queries I have written I have had to just use the select projection by it self. In this case I need to perform the grp.count() and the immediate if logic.
I have searched SO and other references but cannot find the answer.
