private static bool ProcessTake(
SqlSelect sqlSelect, TakeResultOperator takeResultOperator)
{
sqlSelect.AddLimit(takeResultOperator.GetConstantCount());
return(false);
}
protected override Expression VisitEntityQueryable(Type elementType)
{
var queryMethodInfo = _queryModelVisitor._enumerableMethodProvider.QueryValues;
var entityType = QueryCompilationContext.Model.GetEntityType(elementType);
var entityQuery = new SqlSelect().SetTableSource(entityType.StorageName);
_queryModelVisitor._queriesBySource.Add(_querySource, entityQuery);
if (_queryModelVisitor.QuerySourceRequiresMaterialization(_querySource))
{
foreach (var property in entityType.Properties)
{
entityQuery.AddToProjection(property);
}
queryMethodInfo
= _queryModelVisitor._enumerableMethodProvider.QueryEntities
.MakeGenericMethod(elementType);
}
return(Expression.Call(
queryMethodInfo, QueryContextParameter, Expression.Constant(entityQuery)));
}
private static IAsyncEnumerable <TEntity> _QueryEntities <TEntity>(QueryContext queryContext, SqlSelect sqlSelect)
{
var relationalQueryContext = ((RelationalQueryContext)queryContext);
return(new AsyncEnumerable <TEntity>(
relationalQueryContext.Connection,
sqlSelect.ToString(),
r => (TEntity)queryContext.StateManager
.GetOrMaterializeEntry(
queryContext.Model.GetEntityType(typeof(TEntity)),
relationalQueryContext.ValueReaderFactory.Create(r)).Entity,
queryContext.Logger));
}
private static IAsyncEnumerable <IValueReader> _QueryValues(QueryContext queryContext, SqlSelect sqlSelect)
{
var relationalQueryContext = (RelationalQueryContext)queryContext;
return(new AsyncEnumerable <IValueReader>(
relationalQueryContext.Connection,
sqlSelect.ToString(),
r => relationalQueryContext.ValueReaderFactory.Create(r),
queryContext.Logger));
}
private static bool ProcessDistinct(SqlSelect sqlSelect)
{
return(!sqlSelect.TryMakeDistinct());
}
private static bool ProcessFirst(SqlSelect sqlSelect)
{
sqlSelect.AddLimit(1);
return(false);
}
private static bool ProcessSingle(SqlSelect sqlSelect)
{
sqlSelect.AddLimit(2);
return(false);
}
