使用视图联合插入表中导致问题

Question

I am trying to insert data into a temp table by doing union of view but i am getting following error.What could be the reason for it. When i do normal select the query runs fine.

Query processor could not produce a query plan because of the hints defined in this query. Resubmit the query without specifying any hints and without using SET FORCEPLAN.

insert into #temp
SELECT 'aaa', COUNT(*) FROM view1
 UNION
 SELECT 'bbb', COUNT(*) FROM view2
 UNION
 SELECT 'ccc', COUNT(*) FROM view3
 UNION
 SELECT 'ddd', COUNT(*) FROM view4
 UNION
 SELECT 'eee', COUNT(*) FROM view5
 UNION
 SELECT 'fff', COUNT(*) FROM view6
 UNION
 SELECT 'ggg', COUNT(*) FROM view7
 UNION
 SELECT 'hhh', COUNT(*) FROM view8

Answer 1

What you have written should work. Check for 2 things. Since it is a temporary table, check if removing any view from the UNION of views fixes it. Then, check that view individually. Script all your views and check if any of those use hints like NOLOCK, EXPAND etc. and which one is causing the problem.

Also, you can try writing it like this

insert into #temp
SELECT field, total FROM 
 (SELECT 'aaa' field, COUNT(*) total FROM view1
 UNION
 SELECT 'bbb', COUNT(*) FROM view2
 UNION
 SELECT 'ccc', COUNT(*) FROM view3
 UNION
 SELECT 'ddd', COUNT(*) FROM view4
 UNION
 SELECT 'eee', COUNT(*) FROM view5
 UNION
 SELECT 'fff', COUNT(*) FROM view6
 UNION
 SELECT 'ggg', COUNT(*) FROM view7
 UNION
 SELECT 'hhh', COUNT(*) FROM view8) Z