[jira] [Created] (SPARK-15776) Type coercion incorrect

["Weizhong (JIRA)" <ji...@apache.org>]

Weizhong created SPARK-15776:
--------------------------------

             Summary: Type coercion incorrect
                 Key: SPARK-15776
                 URL: https://issues.apache.org/jira/browse/SPARK-15776
             Project: Spark
          Issue Type: Bug
          Components: SQL
         Environment: Spark based on commit 26c1089c37149061f838129bb53330ded68ff4c9
            Reporter: Weizhong
            Priority: Minor


{code:sql}
CREATE TABLE cdr (
  debet_dt          int      ,
  srv_typ_cd        string   ,
  b_brnd_cd         smallint ,
  call_dur          int
)
ROW FORMAT delimited fields terminated by ','
STORED AS TEXTFILE;
{code}

{code:sql}
SELECT debet_dt,
       SUM(CASE WHEN srv_typ_cd LIKE '0%' THEN call_dur / 60 ELSE 0 END)
FROM cdr
GROUP BY debet_dt
ORDER BY debet_dt;
{code}

{noformat}
== Analyzed Logical Plan ==
debet_dt: int, sum(CASE WHEN srv_typ_cd LIKE 0% THEN (call_dur / 60) ELSE 0 END): bigint
Project [debet_dt#16, sum(CASE WHEN srv_typ_cd LIKE 0% THEN (call_dur / 60) ELSE 0 END)#27L]
+- Sort [debet_dt#16 ASC], true
   +- Aggregate [debet_dt#16], [debet_dt#16, sum(cast(CASE WHEN srv_typ_cd#18 LIKE 0% THEN (cast(call_dur#21 as double) / cast(60 as double)) ELSE cast(0 as double) END as bigint)) AS sum(CASE WHEN srv_typ_cd LIKE 0% THEN (call_dur / 60) ELSE 0 END)#27L]
      +- MetastoreRelation default, cdr
{noformat}

{code:sql}
SELECT debet_dt,
       SUM(CASE WHEN b_brnd_cd IN(1) THEN call_dur / 60 ELSE 0 END)
FROM cdr
GROUP BY debet_dt
ORDER BY debet_dt;
{code}

{noformat}
== Analyzed Logical Plan ==
debet_dt: int, sum(CASE WHEN (CAST(b_brnd_cd AS INT) IN (CAST(1 AS INT))) THEN (CAST(call_dur AS DOUBLE) / CAST(60 AS DOUBLE)) ELSE CAST(0 AS DOUBLE) END): double
Project [debet_dt#76, sum(CASE WHEN (CAST(b_brnd_cd AS INT) IN (CAST(1 AS INT))) THEN (CAST(call_dur AS DOUBLE) / CAST(60 AS DOUBLE)) ELSE CAST(0 AS DOUBLE) END)#87]
+- Sort [debet_dt#76 ASC], true
   +- Aggregate [debet_dt#76], [debet_dt#76, sum(CASE WHEN cast(b_brnd_cd#80 as int) IN (cast(1 as int)) THEN (cast(call_dur#81 as double) / cast(60 as double)) ELSE cast(0 as double) END) AS sum(CASE WHEN (CAST(b_brnd_cd AS INT) IN (CAST(1 AS INT))) THEN (CAST(call_dur AS DOUBLE) / CAST(60 AS DOUBLE)) ELSE CAST(0 AS DOUBLE) END)#87]
      +- MetastoreRelation default, cdr
{noformat}

The only difference is WHEN condition, but will result different output column type(one is bigint, one is double) 



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