PREHOOK: query: DESCRIBE FUNCTION if
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION if
POSTHOOK: type: DESCFUNCTION
IF(expr1,expr2,expr3) - If expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns expr2; otherwise it returns expr3. IF() returns a numeric or string value, depending on the context in which it is used.
PREHOOK: query: DESCRIBE FUNCTION EXTENDED if
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED if
POSTHOOK: type: DESCFUNCTION
IF(expr1,expr2,expr3) - If expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns expr2; otherwise it returns expr3. IF() returns a numeric or string value, depending on the context in which it is used.
PREHOOK: query: EXPLAIN
SELECT IF(TRUE, 1, 2) AS COL1,
       IF(FALSE, CAST(NULL AS STRING), CAST(1 AS STRING)) AS COL2,
       IF(1=1, IF(2=2, 1, 2), IF(3=3, 3, 4)) AS COL3,
       IF(2=2, 1, NULL) AS COL4,
       IF(2=2, NULL, 1) AS COL5,
       IF(IF(TRUE, NULL, FALSE), 1, 2) AS COL6
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
POSTHOOK: query: EXPLAIN
SELECT IF(TRUE, 1, 2) AS COL1,
       IF(FALSE, CAST(NULL AS STRING), CAST(1 AS STRING)) AS COL2,
       IF(1=1, IF(2=2, 1, 2), IF(3=3, 3, 4)) AS COL3,
       IF(2=2, 1, NULL) AS COL4,
       IF(2=2, NULL, 1) AS COL5,
       IF(IF(TRUE, NULL, FALSE), 1, 2) AS COL6
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-0 is a root stage

STAGE PLANS:
  Stage: Stage-0
    Fetch Operator
      limit: -1
      Processor Tree:
        TableScan
          alias: src
          Row Limit Per Split: 1
          Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: COMPLETE
          Select Operator
            expressions: 1 (type: int), if(false, UDFToString(null), '1') (type: string), 1 (type: int), if(true, 1, null) (type: int), if(true, null, 1) (type: int), if(if(true, null, false), 1, 2) (type: int)
            outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5
            Statistics: Num rows: 500 Data size: 52500 Basic stats: COMPLETE Column stats: COMPLETE
            ListSink

PREHOOK: query: SELECT IF(TRUE, 1, 2) AS COL1,
       IF(FALSE, CAST(NULL AS STRING), CAST(1 AS STRING)) AS COL2,
       IF(1=1, IF(2=2, 1, 2), IF(3=3, 3, 4)) AS COL3,
       IF(2=2, 1, NULL) AS COL4,
       IF(2=2, NULL, 1) AS COL5,
       IF(IF(TRUE, NULL, FALSE), 1, 2) AS COL6
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT IF(TRUE, 1, 2) AS COL1,
       IF(FALSE, CAST(NULL AS STRING), CAST(1 AS STRING)) AS COL2,
       IF(1=1, IF(2=2, 1, 2), IF(3=3, 3, 4)) AS COL3,
       IF(2=2, 1, NULL) AS COL4,
       IF(2=2, NULL, 1) AS COL5,
       IF(IF(TRUE, NULL, FALSE), 1, 2) AS COL6
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
1	1	1	1	NULL	2
PREHOOK: query: -- Type conversions
EXPLAIN
SELECT IF(TRUE, CAST(128 AS SMALLINT), CAST(1 AS TINYINT)) AS COL1,
       IF(FALSE, 1, 1.1) AS COL2,
       IF(FALSE, 1, 'ABC') AS COL3,
       IF(FALSE, 'ABC', 12.3) AS COL4
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
POSTHOOK: query: -- Type conversions
EXPLAIN
SELECT IF(TRUE, CAST(128 AS SMALLINT), CAST(1 AS TINYINT)) AS COL1,
       IF(FALSE, 1, 1.1) AS COL2,
       IF(FALSE, 1, 'ABC') AS COL3,
       IF(FALSE, 'ABC', 12.3) AS COL4
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-0 is a root stage

STAGE PLANS:
  Stage: Stage-0
    Fetch Operator
      limit: -1
      Processor Tree:
        TableScan
          alias: src
          Row Limit Per Split: 1
          Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: COMPLETE
          Select Operator
            expressions: 128 (type: smallint), 1.1 (type: double), 'ABC' (type: string), '12.3' (type: string)
            outputColumnNames: _col0, _col1, _col2, _col3
            Statistics: Num rows: 500 Data size: 93500 Basic stats: COMPLETE Column stats: COMPLETE
            ListSink

PREHOOK: query: SELECT IF(TRUE, CAST(128 AS SMALLINT), CAST(1 AS TINYINT)) AS COL1,
       IF(FALSE, 1, 1.1) AS COL2,
       IF(FALSE, 1, 'ABC') AS COL3,
       IF(FALSE, 'ABC', 12.3) AS COL4
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT IF(TRUE, CAST(128 AS SMALLINT), CAST(1 AS TINYINT)) AS COL1,
       IF(FALSE, 1, 1.1) AS COL2,
       IF(FALSE, 1, 'ABC') AS COL3,
       IF(FALSE, 'ABC', 12.3) AS COL4
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
128	1.1	ABC	12.3