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Posted to dev@hive.apache.org by "r7raul1984@163.com" <r7...@163.com> on 2015/05/12 04:10:23 UTC
hive on tez not convert map join to broadcast join
In MR query plan is
Map Join Operator
condition map:
Left Outer Join0 to 1
keys:
0 ordr_code (type: string), cart_prod_id (type: bigint)
1 parnt_ordr_code (type: string), comb_prod_id (type: bigint)
outputColumnNames: _col1, _col2, _col3, _col5, _col10, _col11, _col15, _col16,
But in tez
Reducer 2 <- Map 1 (SIMPLE_EDGE), Map 4 (SIMPLE_EDGE) No broadcast edge
Reducer 3 <- Map 5 (SIMPLE_EDGE), Reducer 2 (SIMPLE_EDGE)
Merge Join Operator
condition map:
Left Outer Join0 to 1
keys:
0 ordr_code (type: string), cart_prod_id (type: bigint)
1 parnt_ordr_code (type: string), comb_prod_id (type: bigint)
r7raul1984@163.com