PREHOOK: query: DESCRIBE FUNCTION nvl
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION nvl
POSTHOOK: type: DESCFUNCTION
nvl(value,default_value) - Returns default value if value is null else returns value
PREHOOK: query: DESCRIBE FUNCTION EXTENDED nvl
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED nvl
POSTHOOK: type: DESCFUNCTION
nvl(value,default_value) - Returns default value if value is null else returns value
Example:
  > SELECT nvl(null,'bla') FROM src LIMIT 1;
  bla
PREHOOK: query: EXPLAIN
SELECT NVL( 1 , 2 ) AS COL1,
       NVL( NULL, 5 ) AS COL2
FROM src LIMIT 1
PREHOOK: type: QUERY
POSTHOOK: query: EXPLAIN
SELECT NVL( 1 , 2 ) AS COL1,
       NVL( NULL, 5 ) AS COL2
FROM src LIMIT 1
POSTHOOK: type: QUERY
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_FUNCTION NVL 1 2) COL1) (TOK_SELEXPR (TOK_FUNCTION NVL TOK_NULL 5) COL2)) (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:
        src 
          TableScan
            alias: src
            Select Operator
              expressions:
                    expr: if 1 is null returns2
                    type: int
                    expr: if null is null returns5
                    type: int
              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: 1


PREHOOK: query: SELECT NVL( 1 , 2 ) AS COL1,
       NVL( NULL, 5 ) AS COL2
FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT NVL( 1 , 2 ) AS COL1,
       NVL( NULL, 5 ) AS COL2
FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
1	5