PREHOOK: query: create table table_asc(key int, value string) CLUSTERED BY (key) SORTED BY (key asc) 
INTO 1 BUCKETS STORED AS RCFILE
PREHOOK: type: CREATETABLE
PREHOOK: Output: database:default
PREHOOK: Output: default@table_asc
POSTHOOK: query: create table table_asc(key int, value string) CLUSTERED BY (key) SORTED BY (key asc) 
INTO 1 BUCKETS STORED AS RCFILE
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: database:default
POSTHOOK: Output: default@table_asc
PREHOOK: query: create table table_desc(key int, value string) CLUSTERED BY (key) SORTED BY (key desc) 
INTO 1 BUCKETS STORED AS RCFILE
PREHOOK: type: CREATETABLE
PREHOOK: Output: database:default
PREHOOK: Output: default@table_desc
POSTHOOK: query: create table table_desc(key int, value string) CLUSTERED BY (key) SORTED BY (key desc) 
INTO 1 BUCKETS STORED AS RCFILE
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: database:default
POSTHOOK: Output: default@table_desc
PREHOOK: query: insert overwrite table table_asc select key, value from src
PREHOOK: type: QUERY
PREHOOK: Input: default@src
PREHOOK: Output: default@table_asc
POSTHOOK: query: insert overwrite table table_asc select key, value from src
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
POSTHOOK: Output: default@table_asc
POSTHOOK: Lineage: table_asc.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
POSTHOOK: Lineage: table_asc.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
PREHOOK: query: insert overwrite table table_desc select key, value from src
PREHOOK: type: QUERY
PREHOOK: Input: default@src
PREHOOK: Output: default@table_desc
POSTHOOK: query: insert overwrite table table_desc select key, value from src
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
POSTHOOK: Output: default@table_desc
POSTHOOK: Lineage: table_desc.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
POSTHOOK: Lineage: table_desc.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
PREHOOK: query: -- If the user asked for sort merge join to be enforced (by setting
-- hive.enforce.sortmergebucketmapjoin to true), an error should be thrown, since
-- one of the tables is in ascending order and the other is in descending order,
-- and sort merge bucket mapjoin cannot be performed. In the default mode, the
-- query would succeed, although a regular map-join would be performed instead of
-- what the user asked.

explain 
select /*+mapjoin(a)*/ * from table_asc a join table_desc b on a.key = b.key
PREHOOK: type: QUERY
POSTHOOK: query: -- If the user asked for sort merge join to be enforced (by setting
-- hive.enforce.sortmergebucketmapjoin to true), an error should be thrown, since
-- one of the tables is in ascending order and the other is in descending order,
-- and sort merge bucket mapjoin cannot be performed. In the default mode, the
-- query would succeed, although a regular map-join would be performed instead of
-- what the user asked.

explain 
select /*+mapjoin(a)*/ * from table_asc a join table_desc b on a.key = b.key
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-3 is a root stage
  Stage-1 depends on stages: Stage-3
  Stage-0 depends on stages: Stage-1

STAGE PLANS:
  Stage: Stage-3
    Map Reduce Local Work
      Alias -> Map Local Tables:
        a 
          Fetch Operator
            limit: -1
      Alias -> Map Local Operator Tree:
        a 
          TableScan
            alias: a
            Statistics: Num rows: 500 Data size: 4812 Basic stats: COMPLETE Column stats: NONE
            Filter Operator
              predicate: key is not null (type: boolean)
              Statistics: Num rows: 250 Data size: 2406 Basic stats: COMPLETE Column stats: NONE
              HashTable Sink Operator
                keys:
                  0 key (type: int)
                  1 key (type: int)

  Stage: Stage-1
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: b
            Statistics: Num rows: 500 Data size: 4812 Basic stats: COMPLETE Column stats: NONE
            Filter Operator
              predicate: key is not null (type: boolean)
              Statistics: Num rows: 250 Data size: 2406 Basic stats: COMPLETE Column stats: NONE
              Map Join Operator
                condition map:
                     Inner Join 0 to 1
                keys:
                  0 key (type: int)
                  1 key (type: int)
                outputColumnNames: _col0, _col1, _col5, _col6
                Statistics: Num rows: 275 Data size: 2646 Basic stats: COMPLETE Column stats: NONE
                Select Operator
                  expressions: _col0 (type: int), _col1 (type: string), _col5 (type: int), _col6 (type: string)
                  outputColumnNames: _col0, _col1, _col2, _col3
                  Statistics: Num rows: 275 Data size: 2646 Basic stats: COMPLETE Column stats: NONE
                  File Output Operator
                    compressed: false
                    Statistics: Num rows: 275 Data size: 2646 Basic stats: COMPLETE Column stats: NONE
                    table:
                        input format: org.apache.hadoop.mapred.TextInputFormat
                        output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                        serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
      Local Work:
        Map Reduce Local Work

  Stage: Stage-0
    Fetch Operator
      limit: -1
      Processor Tree:
        ListSink

FAILED: SemanticException [Error 10135]: Sort merge bucketed join could not be performed. If you really want to perform the operation, either set hive.optimize.bucketmapjoin.sortedmerge=false, or set hive.enforce.sortmergebucketmapjoin=false.