PREHOOK: query: EXPLAIn
SELECT a, b FROM (
  SELECT key a, value b
  FROM src
) src1
ORDER BY a LIMIT 1
PREHOOK: type: QUERY
POSTHOOK: query: EXPLAIn
SELECT a, b FROM (
  SELECT key a, value b
  FROM src
) src1
ORDER BY a LIMIT 1
POSTHOOK: type: QUERY
ABSTRACT SYNTAX TREE:
  (TOK_QUERY (TOK_FROM (TOK_SUBQUERY (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 key) a) (TOK_SELEXPR (TOK_TABLE_OR_COL value) b)))) src1)) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL a)) (TOK_SELEXPR (TOK_TABLE_OR_COL b))) (TOK_ORDERBY (TOK_TABSORTCOLNAMEASC (TOK_TABLE_OR_COL a))) (TOK_LIMIT 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:
        src1:src 
          TableScan
            alias: src
            Select Operator
              expressions:
                    expr: key
                    type: string
                    expr: value
                    type: string
              outputColumnNames: _col0, _col1
              Select Operator
                expressions:
                      expr: _col0
                      type: string
                      expr: _col1
                      type: string
                outputColumnNames: _col0, _col1
                Reduce Output Operator
                  key expressions:
                        expr: _col0
                        type: string
                  sort order: +
                  tag: -1
                  value expressions:
                        expr: _col0
                        type: string
                        expr: _col1
                        type: string
      Reduce Operator Tree:
        Extract
          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: 1


PREHOOK: query: SELECT a, b FROM (
  SELECT key a, value b
  FROM src
) src1
ORDER BY a LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
PREHOOK: Output: file:/tmp/sdong/hive_2011-02-10_17-04-31_466_7549947364806084065/-mr-10000
POSTHOOK: query: SELECT a, b FROM (
  SELECT key a, value b
  FROM src
) src1
ORDER BY a LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
POSTHOOK: Output: file:/tmp/sdong/hive_2011-02-10_17-04-31_466_7549947364806084065/-mr-10000
0	val_0