query: -- scanning un-partitioned data
explain extended select * from src where rand(1) < 0.1
ABSTRACT SYNTAX TREE:
  (TOK_QUERY (TOK_FROM (TOK_TABREF src)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_WHERE (< (TOK_FUNCTION rand 1) 0.1))))

STAGE DEPENDENCIES:
  Stage-1 is a root stage
  Stage-0 is a root stage

STAGE PLANS:
  Stage: Stage-1
    Map Reduce
      Alias -> Map Operator Tree:
        src 
          TableScan
            alias: src
            Filter Operator
              isSamplingPred: false
              predicate:
                  expr: (rand(UDFToLong(1)) < 0.1)
                  type: boolean
              Select Operator
                expressions:
                      expr: key
                      type: string
                      expr: value
                      type: string
                outputColumnNames: _col0, _col1
                File Output Operator
                  compressed: false
                  GlobalTableId: 0
                  directory: file:/data/users/athusoo/commits/hive_trunk_ws1/build/ql/tmp/972674441/10001
                  table:
                      input format: org.apache.hadoop.mapred.TextInputFormat
                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                      properties:
                        columns _col0,_col1
                        serialization.format 1
                        columns.types string:string
      Needs Tagging: false
      Path -> Alias:
        file:/data/users/athusoo/commits/hive_trunk_ws1/build/ql/test/data/warehouse/src 
      Path -> Partition:
        file:/data/users/athusoo/commits/hive_trunk_ws1/build/ql/test/data/warehouse/src 
          Partition
          
              input format: org.apache.hadoop.mapred.TextInputFormat
              output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
              properties:
                name src
                columns.types string:string
                serialization.ddl struct src { string key, string value}
                serialization.format 1
                columns key,value
                bucket_count -1
                serialization.lib org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
                file.inputformat org.apache.hadoop.mapred.TextInputFormat
                file.outputformat org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
                location file:/data/users/athusoo/commits/hive_trunk_ws1/build/ql/test/data/warehouse/src
              serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
              name: src

  Stage: Stage-0
    Fetch Operator
      limit: -1


query: select * from src where rand(1) < 0.1
Input: default/src
Output: file:/data/users/athusoo/commits/hive_trunk_ws1/build/ql/tmp/1925118619/10000
409	val_409
429	val_429
209	val_209
153	val_153
203	val_203
170	val_170
489	val_489
378	val_378
221	val_221
498	val_498
469	val_469
176	val_176
176	val_176
384	val_384
217	val_217
431	val_431
51	val_51
288	val_288
457	val_457
197	val_197
77	val_77
138	val_138
277	val_277
224	val_224
309	val_309
389	val_389
331	val_331
317	val_317
336	val_336
42	val_42
458	val_458
78	val_78
453	val_453
74	val_74
103	val_103
467	val_467
202	val_202
469	val_469
44	val_44
454	val_454
70	val_70
491	val_491
199	val_199
169	val_169
310	val_310
233	val_233
133	val_133
26	val_26
134	val_134
18	val_18
298	val_298
348	val_348
469	val_469
37	val_37
152	val_152
400	val_400