Saving all output to "!!{outputDirectory}!!/groupby2_limit.q.raw". Enter "record" with no arguments to stop it.
>>>  !run !!{qFileDirectory}!!/groupby2_limit.q
>>>  set mapred.reduce.tasks=31;
No rows affected 
>>>  
>>>  EXPLAIN 
SELECT src.key, sum(substr(src.value,5)) FROM src GROUP BY src.key LIMIT 5;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME src))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL src) key)) (TOK_SELEXPR (TOK_FUNCTION sum (TOK_FUNCTION substr (. (TOK_TABLE_OR_COL src) value) 5)))) (TOK_GROUPBY (. (TOK_TABLE_OR_COL src) key)) (TOK_LIMIT 5)))'
''
'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'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: string'
'                    expr: value'
'                    type: string'
'              outputColumnNames: key, value'
'              Group By Operator'
'                aggregations:'
'                      expr: sum(substr(value, 5))'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: string'
'                mode: hash'
'                outputColumnNames: _col0, _col1'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: string'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: string'
'                  tag: -1'
'                  value expressions:'
'                        expr: _col1'
'                        type: double'
'      Reduce Operator Tree:'
'        Group By Operator'
'          aggregations:'
'                expr: sum(VALUE._col0)'
'          bucketGroup: false'
'          keys:'
'                expr: KEY._col0'
'                type: string'
'          mode: mergepartial'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: string'
'                  expr: _col1'
'                  type: double'
'            outputColumnNames: _col0, _col1'
'            Limit'
'              File Output Operator'
'                compressed: false'
'                GlobalTableId: 0'
'                table:'
'                    input format: org.apache.hadoop.mapred.TextInputFormat'
'                    output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: 5'
''
''
72 rows selected 
>>>  
>>>  SELECT src.key, sum(substr(src.value,5)) FROM src GROUP BY src.key LIMIT 5;
'key','_c1'
'0','0.0'
'10','10.0'
'100','200.0'
'103','206.0'
'104','208.0'
5 rows selected 
>>>  
>>>  !record