PREHOOK: query: CREATE TABLE T1(key STRING, val STRING) STORED AS TEXTFILE
PREHOOK: type: CREATETABLE
PREHOOK: Output: database:default
PREHOOK: Output: default@T1
POSTHOOK: query: CREATE TABLE T1(key STRING, val STRING) STORED AS TEXTFILE
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: database:default
POSTHOOK: Output: default@T1
PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T1.txt' INTO TABLE T1
PREHOOK: type: LOAD
#### A masked pattern was here ####
PREHOOK: Output: default@t1
POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T1.txt' INTO TABLE T1
POSTHOOK: type: LOAD
#### A masked pattern was here ####
POSTHOOK: Output: default@t1
PREHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE
PREHOOK: type: CREATETABLE
PREHOOK: Output: database:default
PREHOOK: Output: default@T2
POSTHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: database:default
POSTHOOK: Output: default@T2
PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T2.txt' INTO TABLE T2
PREHOOK: type: LOAD
#### A masked pattern was here ####
PREHOOK: Output: default@t2
POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T2.txt' INTO TABLE T2
POSTHOOK: type: LOAD
#### A masked pattern was here ####
POSTHOOK: Output: default@t2
PREHOOK: query: CREATE TABLE T3(key STRING, val STRING)
SKEWED BY (val) ON ((12)) STORED AS TEXTFILE
PREHOOK: type: CREATETABLE
PREHOOK: Output: database:default
PREHOOK: Output: default@T3
POSTHOOK: query: CREATE TABLE T3(key STRING, val STRING)
SKEWED BY (val) ON ((12)) STORED AS TEXTFILE
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: database:default
POSTHOOK: Output: default@T3
PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T3.txt' INTO TABLE T3
PREHOOK: type: LOAD
#### A masked pattern was here ####
PREHOOK: Output: default@t3
POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T3.txt' INTO TABLE T3
POSTHOOK: type: LOAD
#### A masked pattern was here ####
POSTHOOK: Output: default@t3
PREHOOK: query: -- copy from skewjoinopt13
-- test compile time skew join and auto map join
-- This test is for skewed join compile time optimization for more than 2 tables.
-- The join key for table 3 is different from the join key used for joining
-- tables 1 and 2. Table 3 is skewed, but since one of the join sources for table
-- 3 consist of a sub-query which contains a join, the compile time skew join 
-- optimization is not performed
-- adding a order by at the end to make the results deterministic

EXPLAIN
select *
from 
T1 a join T2 b on a.key = b.key 
join T3 c on a.val = c.val
PREHOOK: type: QUERY
POSTHOOK: query: -- copy from skewjoinopt13
-- test compile time skew join and auto map join
-- This test is for skewed join compile time optimization for more than 2 tables.
-- The join key for table 3 is different from the join key used for joining
-- tables 1 and 2. Table 3 is skewed, but since one of the join sources for table
-- 3 consist of a sub-query which contains a join, the compile time skew join 
-- optimization is not performed
-- adding a order by at the end to make the results deterministic

EXPLAIN
select *
from 
T1 a join T2 b on a.key = b.key 
join T3 c on a.val = c.val
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-7 is a root stage
  Stage-5 depends on stages: Stage-7
  Stage-0 depends on stages: Stage-5

STAGE PLANS:
  Stage: Stage-7
    Map Reduce Local Work
      Alias -> Map Local Tables:
        a 
          Fetch Operator
            limit: -1
        c 
          Fetch Operator
            limit: -1
      Alias -> Map Local Operator Tree:
        a 
          TableScan
            alias: a
            Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: (key is not null and val is not null) (type: boolean)
              Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
              HashTable Sink Operator
                keys:
                  0 key (type: string)
                  1 key (type: string)
        c 
          TableScan
            alias: c
            Statistics: Num rows: 0 Data size: 20 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: val is not null (type: boolean)
              Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
              HashTable Sink Operator
                keys:
                  0 _col1 (type: string)
                  1 val (type: string)

  Stage: Stage-5
    Map Reduce
      Map Operator Tree:
          TableScan
            alias: b
            Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE
            Filter Operator
              predicate: key is not null (type: boolean)
              Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
              Map Join Operator
                condition map:
                     Inner Join 0 to 1
                keys:
                  0 key (type: string)
                  1 key (type: string)
                outputColumnNames: _col0, _col1, _col5, _col6
                Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
                Map Join Operator
                  condition map:
                       Inner Join 0 to 1
                  keys:
                    0 _col1 (type: string)
                    1 val (type: string)
                  outputColumnNames: _col0, _col1, _col5, _col6, _col10, _col11
                  Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
                  Select Operator
                    expressions: _col0 (type: string), _col1 (type: string), _col5 (type: string), _col6 (type: string), _col10 (type: string), _col11 (type: string)
                    outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5
                    Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE
                    File Output Operator
                      compressed: false
                      Statistics: Num rows: 0 Data size: 0 Basic stats: NONE 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

PREHOOK: query: select *
from 
T1 a join T2 b on a.key = b.key 
join T3 c on a.val = c.val
order by a.key, b.key, c.key, a.val, b.val, c.val
PREHOOK: type: QUERY
PREHOOK: Input: default@t1
PREHOOK: Input: default@t2
PREHOOK: Input: default@t3
#### A masked pattern was here ####
POSTHOOK: query: select *
from 
T1 a join T2 b on a.key = b.key 
join T3 c on a.val = c.val
order by a.key, b.key, c.key, a.val, b.val, c.val
POSTHOOK: type: QUERY
POSTHOOK: Input: default@t1
POSTHOOK: Input: default@t2
POSTHOOK: Input: default@t3
#### A masked pattern was here ####
2	12	2	22	2	12