public Expression VisitSqlGroupingSelectExpression(SqlGroupingSelectExpression expression)
{
ArgumentUtility.CheckNotNull("expression", expression);
var referenceToKeyExpression = ResolveChildExpression(expression.KeyExpression);
var referenceToElementExpression = ResolveChildExpression(expression.ElementExpression);
var referenceToAggregationExpressions = expression.AggregationExpressions.Select(expr => ResolveChildExpression(expr));
var newGroupingExpression = SqlGroupingSelectExpression.CreateWithNames(referenceToKeyExpression, referenceToElementExpression);
foreach (var aggregationExpression in referenceToAggregationExpressions)
{
newGroupingExpression.AddAggregationExpressionWithName(aggregationExpression);
}
_context.AddGroupReferenceMapping(newGroupingExpression, _sqlTable);
return(newGroupingExpression);
}
public void ProcessNames_SqlGroupingSelectExpression()
{
var keyExpression = new NamedExpression("key", Expression.Constant("key"));
var elementExpression = new NamedExpression("element", Expression.Constant("element"));
var aggregationExpression = new NamedExpression("a0", Expression.Constant("aggregation"));
var groupingSelectExpression = new SqlGroupingSelectExpression(keyExpression, elementExpression, new[] { aggregationExpression });
var expression = new NamedExpression("outer", groupingSelectExpression);
var sqlTable = SqlStatementModelObjectMother.CreateSqlTable(typeof(Cook));
_context.AddGroupReferenceMapping(groupingSelectExpression, sqlTable);
var expectedResult = new SqlGroupingSelectExpression(
new NamedExpression("outer_key", Expression.Constant("key")),
new NamedExpression("outer_element", Expression.Constant("element")),
new[] { new NamedExpression("outer_a0", Expression.Constant("aggregation")) });
var result = _namedExpressionCombiner.ProcessNames(expression);
SqlExpressionTreeComparer.CheckAreEqualTrees(result, expectedResult);
Assert.That(_context.GetReferencedGroupSource(((SqlGroupingSelectExpression)result)), Is.SameAs(sqlTable));
}