private static SelectExpression Verify(SelectExpression selectExpression)
{
if (selectExpression.Projection.Count != 1)
{
throw new InvalidOperationException(CoreStrings.TranslationFailed(selectExpression.Print()));
}
return(selectExpression);
}
public InExpression In(SqlExpression item, SelectExpression subquery, bool negated)
{
var sqlExpression = subquery.Projection.Single().Expression;
var typeMapping = sqlExpression.TypeMapping;
if (typeMapping == null)
{
throw new InvalidOperationException(
$"The subquery '{subquery.Print()}' references type '{sqlExpression.Type}' for which no type mapping could be found.");
}
item = ApplyTypeMapping(item, typeMapping);
return(new InExpression(item, negated, subquery, _boolTypeMapping));
}