PREHOOK: query: explain
SELECT src5.src1_value FROM (SELECT src3.*, src4.value as src4_value, src4.key as src4_key FROM src src4 JOIN (SELECT src2.*, src1.key as src1_key, src1.value as src1_value FROM src src1 JOIN src src2 ON src1.key = src2.key) src3 ON src3.src1_key = src4.key) src5
PREHOOK: type: QUERY
POSTHOOK: query: explain
SELECT src5.src1_value FROM (SELECT src3.*, src4.value as src4_value, src4.key as src4_key FROM src src4 JOIN (SELECT src2.*, src1.key as src1_key, src1.value as src1_value FROM src src1 JOIN src src2 ON src1.key = src2.key) src3 ON src3.src1_key = src4.key) src5
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-1 is a root stage
  Stage-0 depends on stages: Stage-1

STAGE PLANS:
  Stage: Stage-1
    Spark
      Edges:
        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 2), Map 4 (PARTITION-LEVEL SORT, 2)
        Reducer 3 <- Map 5 (PARTITION-LEVEL SORT, 2), Reducer 2 (PARTITION-LEVEL SORT, 2)
#### A masked pattern was here ####
      Vertices:
        Map 1 
            Map Operator Tree:
                TableScan
                  alias: src4
                  Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
                  Filter Operator
                    predicate: key is not null (type: boolean)
                    Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                    Select Operator
                      expressions: key (type: string), value (type: string)
                      outputColumnNames: _col0, _col1
                      Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                      Reduce Output Operator
                        key expressions: _col0 (type: string)
                        sort order: +
                        Map-reduce partition columns: _col0 (type: string)
                        Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                        value expressions: _col1 (type: string)
        Map 4 
            Map Operator Tree:
                TableScan
                  alias: src4
                  Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
                  Filter Operator
                    predicate: key is not null (type: boolean)
                    Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                    Select Operator
                      expressions: key (type: string)
                      outputColumnNames: _col0
                      Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                      Reduce Output Operator
                        key expressions: _col0 (type: string)
                        sort order: +
                        Map-reduce partition columns: _col0 (type: string)
                        Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
        Map 5 
            Map Operator Tree:
                TableScan
                  alias: src4
                  Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
                  Filter Operator
                    predicate: key is not null (type: boolean)
                    Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                    Select Operator
                      expressions: key (type: string)
                      outputColumnNames: _col0
                      Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
                      Reduce Output Operator
                        key expressions: _col0 (type: string)
                        sort order: +
                        Map-reduce partition columns: _col0 (type: string)
                        Statistics: Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
        Reducer 2 
            Reduce Operator Tree:
              Join Operator
                condition map:
                     Inner Join 0 to 1
                keys:
                  0 _col0 (type: string)
                  1 _col0 (type: string)
                outputColumnNames: _col0, _col1
                Statistics: Num rows: 275 Data size: 2921 Basic stats: COMPLETE Column stats: NONE
                Reduce Output Operator
                  key expressions: _col0 (type: string)
                  sort order: +
                  Map-reduce partition columns: _col0 (type: string)
                  Statistics: Num rows: 275 Data size: 2921 Basic stats: COMPLETE Column stats: NONE
                  value expressions: _col1 (type: string)
        Reducer 3 
            Reduce Operator Tree:
              Join Operator
                condition map:
                     Inner Join 0 to 1
                keys:
                  0 _col0 (type: string)
                  1 _col0 (type: string)
                outputColumnNames: _col1
                Statistics: Num rows: 302 Data size: 3213 Basic stats: COMPLETE Column stats: NONE
                Select Operator
                  expressions: _col1 (type: string)
                  outputColumnNames: _col0
                  Statistics: Num rows: 302 Data size: 3213 Basic stats: COMPLETE Column stats: NONE
                  File Output Operator
                    compressed: false
                    Statistics: Num rows: 302 Data size: 3213 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

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