jcamachor commented on a change in pull request #1031:
URL: https://github.com/apache/hive/pull/1031#discussion_r436443600
##########
File path:
ql/src/test/queries/clientpositive/sketches_materialized_view_cume_dist.q
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@@ -0,0 +1,54 @@
+--! qt:transactional
+set hive.fetch.task.conversion=none;
+
+create table sketch_input (id int, category char(1))
+STORED AS ORC
+TBLPROPERTIES ('transactional'='true');
+
+insert into table sketch_input values
+ (1,'a'),(1, 'a'), (2, 'a'), (3, 'a'), (4, 'a'), (5, 'a'), (6, 'a'), (7,
'a'), (8, 'a'), (9, 'a'), (10, 'a'),
+ (6,'b'),(6, 'b'), (7, 'b'), (8, 'b'), (9, 'b'), (10, 'b'), (11, 'b'), (12,
'b'), (13, 'b'), (14, 'b'), (15, 'b')
+;
+
+-- create an mv for the intermediate results
+create materialized view mv_1 as
+ select category,ds_kll_sketch(cast(-id as float)) from sketch_input group by
category;
+
+-- bi mode on
+set hive.optimize.bi.enabled=true;
+
+explain
+select 'rewrite; mv matching', id, cume_dist() over (order by id) from
sketch_input order by id;
+select 'rewrite; mv matching', id, cume_dist() over (order by id) from
sketch_input order by id;
Review comment:
Yes, that's certainly useful. Something that may help for explain plans
is to use `explain cbo` as it is definitely less verbose.
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