jcamachor commented on a change in pull request #1302:
URL: https://github.com/apache/hive/pull/1302#discussion_r460341568
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File path:
ql/src/test/results/clientpositive/llap/constraints_optimization.q.out
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@@ -2689,13 +2689,17 @@ POSTHOOK: Input: default@store_sales
#### A masked pattern was here ####
CBO PLAN:
HiveProject(c_customer_id=[$1])
- HiveAggregate(group=[{0, 1}])
- HiveJoin(condition=[=($0, $8)], joinType=[inner], algorithm=[none],
cost=[not available])
- HiveProject(c_customer_sk=[$0], c_customer_id=[$1], c_first_name=[$8],
c_last_name=[$9], c_preferred_cust_flag=[$10], c_birth_country=[$14],
c_login=[$15], c_email_address=[$16])
- HiveTableScan(table=[[default, customer]], table:alias=[customer])
- HiveProject(ss_customer_sk=[$3])
- HiveFilter(condition=[IS NOT NULL($3)])
- HiveTableScan(table=[[default, store_sales]],
table:alias=[store_sales])
+ HiveSemiJoin(condition=[=($0, $2)], joinType=[semi])
Review comment:
We should not trigger the optimization in this case, since it is just
doing consecutively the same join. However, this is not actually related to
this patch. Can we create a follow-up?
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