private static Func <QueryContext, TResult> CompileQueryCore <TResult>(
Expression query,
IModel model,
IQueryModelGenerator queryModelGenerator,
IDatabase database,
IDiagnosticsLogger <DbLoggerCategory.Query> logger,
Type contextType)
{
query = ExpandNavigations(query, model);
var queryModel = queryModelGenerator.ParseQuery(query);
// this is temporary, until relinq is removed
var tirev = new TransparentIdentifierRemovingVisitor();
queryModel.TransformExpressions(tirev.Visit);
var atasev = new AnonymousObjectAccessSimplifyingVisitor();
queryModel.TransformExpressions(atasev.Visit);
var resultItemType
= (queryModel.GetOutputDataInfo()
as StreamedSequenceInfo)?.ResultItemType
?? typeof(TResult);
if (resultItemType == typeof(TResult))
{
var compiledQuery = database.CompileQuery <TResult>(queryModel);
return(qc =>
{
try
{
return compiledQuery(qc).First();
}
catch (Exception exception)
{
logger.QueryIterationFailed(contextType, exception);
throw;
}
});
}
try
{
return((Func <QueryContext, TResult>)CompileQueryMethod
.MakeGenericMethod(resultItemType)
.Invoke(database, new object[] { queryModel }));
}
catch (TargetInvocationException e)
{
ExceptionDispatchInfo.Capture(e.InnerException).Throw();
throw;
}
}
private static Func <QueryContext, TResult> CompileQueryCore <TResult>(
Expression query,
IQueryModelGenerator queryModelGenerator,
IDatabase database,
IDiagnosticsLogger <DbLoggerCategory.Query> logger,
Type contextType)
{
var queryModel = queryModelGenerator.ParseQuery(query);
var resultItemType
= (queryModel.GetOutputDataInfo()
as StreamedSequenceInfo)?.ResultItemType
?? typeof(TResult);
if (resultItemType == typeof(TResult))
{
var compiledQuery = database.CompileQuery <TResult>(queryModel);
return(qc =>
{
try
{
return compiledQuery(qc).First();
}
catch (Exception exception)
{
logger.QueryIterationFailed(contextType, exception);
throw;
}
});
}
try
{
return((Func <QueryContext, TResult>)CompileQueryMethod
.MakeGenericMethod(resultItemType)
.Invoke(database, new object[] { queryModel }));
}
catch (TargetInvocationException e)
{
ExceptionDispatchInfo.Capture(e.InnerException).Throw();
throw;
}
}
private static Func <QueryContext, TResult> CompileQueryCore <TResult>(
Expression query,
IQueryModelGenerator queryModelGenerator,
IDatabase database,
IDiagnosticsLogger <DbLoggerCategory.Query> logger,
Type contextType,
bool getRealResult = false)
{
var queryModel = queryModelGenerator.ParseQuery(query);
var resultItemType
= (queryModel.GetOutputDataInfo()
as StreamedSequenceInfo)?.ResultItemType
?? typeof(TResult);
if (resultItemType == typeof(TResult))
{
var compiledQuery = database.CompileQuery <TResult>(queryModel);
return(qc =>
{
try
{
return compiledQuery(qc).First();
}
catch (Exception exception)
{
logger.QueryIterationFailed(contextType, exception);
throw;
}
});
}
try
{
// differs from base implmentation to return DB query result
var compileFunction = (Func <QueryContext, TResult>)CompileQueryMethod
.MakeGenericMethod(resultItemType)
.Invoke(database, new object[] { queryModel });
return(qc =>
{
try
{
// calling ToList to materialize result
var genericToListMethod = ToListMethod.MakeGenericMethod(new Type[] { resultItemType });
var result = genericToListMethod.Invoke(compileFunction(qc), new object[] { compileFunction(qc) });
return (TResult)result;
}
catch (Exception exception)
{
logger.QueryIterationFailed(contextType, exception);
throw;
}
});
}
catch (TargetInvocationException e)
{
ExceptionDispatchInfo.Capture(e.InnerException).Throw();
throw;
}
}
