jcamachor commented on a change in pull request #2196:
URL: https://github.com/apache/hive/pull/2196#discussion_r621843889
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File path:
ql/src/test/queries/clientpositive/materialized_view_create_rewrite_6.q
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@@ -0,0 +1,75 @@
+set hive.support.concurrency=true;
+set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager;
+set hive.materializedview.rewriting.sql=false;
+
+create table t1(a char(15), b int, c int) stored as orc TBLPROPERTIES
('transactional'='true');
+create table t2(a char(15), b int) stored as orc TBLPROPERTIES
('transactional'='true');
+
+insert into t1(a, b, c) values
+('update', 1, 1), ('update', 2, 1),
+('null_update', null, 1), ('null_update', null, 2);
+insert into t1(a, b, c) values ('remove', 3, 1), ('null_remove', null, 1);
+insert into t1(a, b, c) values ('sum0', 0, 1), ('sum0', 0, 2);
+
+insert into t2(a, b) values
+('update', 10),
+('null_update', null);
+insert into t2(a, b) values ('remove', 30), ('null_remove', null);
+insert into t2(a, b) values ('sum0', 0);
+
+-- Aggregate with count(*): incremental rebuild should be triggered even if
there were deletes from source table
+create materialized view mat1 stored as orc TBLPROPERTIES
('transactional'='true') as
+select t1.a, sum(t1.b), count(*) from t1
+join t2 on (t1.a = t2.a)
+group by t1.a;
+
+
+explain cbo
+select t1.a, sum(t1.b) from t1
+join t2 on (t1.a = t2.a)
+group by t1.a;
+
+-- do some changes on source table data
+delete from t1 where b = 1;
+delete from t1 where a = 'remove';
+delete from t1 where c = 2;
+
+insert into t1(a,b,c) values
+('update', 5, 1),
+('add', 5, 1),
+('add/remove', 0, 0),
+('null_update', null, 0),
+('null_add', null, 0),
+('null_add/remove', null, 0);
+
+delete from t1 where a like 'add/remove';
+
+-- view can not be used
+explain cbo
+select t1.a, sum(t1.b) from t1
+join t2 on (t1.a = t2.a)
+group by t1.a;
+
+
+-- rebuild the view (incrementally)
+explain cbo
+alter materialized view mat1 rebuild;
+explain
+alter materialized view mat1 rebuild;
+alter materialized view mat1 rebuild;
Review comment:
Does this example contain rows that hit the three branches in the merge,
i.e., insert, update, delete?
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