Github user dilipbiswal commented on the issue:
https://github.com/apache/spark/pull/22198
@maropu @gatorsmile I do have a question on the semantics.
```SQL
use hint;
explain extended SELECT /*+ BROADCASTJOIN(hint.s2) */ * FROM s1, s2 where
s1.c1 = s2.c1;
```
In this case, aren't we supposed to apply the hint ? even though s2 is not
explicitly qualified with the database ? Here is the optimized plan i see ..
```
*(5) SortMergeJoin [c1#30], [c1#32], Inner
:- *(2) Sort [c1#30 ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(c1#30, 200)
: +- *(1) Filter isnotnull(c1#30)
: +- HiveTableScan [c1#30, c2#31], HiveTableRelation `hint`.`s1`,
org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, [c1#30, c2#31]
+- *(4) Sort [c1#32 ASC NULLS FIRST], false, 0
+- Exchange hashpartitioning(c1#32, 200)
+- *(3) Filter isnotnull(c1#32)
+- HiveTableScan [c1#32, c2#33], HiveTableRelation `hint`.`s2`,
org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, [c1#32, c2#33]
```
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