mayankkunwar commented on code in PR #5707:
URL: https://github.com/apache/hive/pull/5707#discussion_r2017066386
##########
ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java:
##########
@@ -182,6 +187,30 @@ public static ReduceWork createReduceWork(
return reduceWork;
}
+ private static boolean hasBucketMapJoin(Operator<? extends OperatorDesc>
operator) {
+ if (operator == null) {
+ return false;
+ }
+
+ // Iterate over child operators
+ for (Operator<? extends OperatorDesc> childOp :
operator.getChildOperators()) {
+ // Check if this is a MapJoinOperator and is a Bucket Map Join
+ if (childOp instanceof MapJoinOperator) {
+ MapJoinOperator mjOp = (MapJoinOperator) childOp;
+ if (mjOp.getConf().isBucketMapJoin()) {
+ return true; // Found BMJ, no need to check further
+ }
+ }
+
+ // Recursively check children
+ if (hasBucketMapJoin(childOp)) {
+ return true;
+ }
Review Comment:
Getting the following final DAG for **EXPLAIN** query for the query
mentioned in the bucketmapjoin_auto_reduce_parallel.q file :
```hiveql
explain extended
select * from target_table2 t inner join (select distinct date_col,
'pipeline' string_col, decimal_col from source_table2 where
coalesce(decimal_col,'') = '50000000000000000005905545593') s on s.date_col =
t.date_col AND s.string_col = t.string_col AND s.decimal_col = t.decimal_col;
```
```
#### A masked pattern was here ####
Edges:
Map 1 <- Reducer 3 (CUSTOM_EDGE)
Reducer 3 <- Map 2 (SIMPLE_EDGE)
```
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