[jira] [Created] (DRILL-1741) kvgen does not work with nested map/unions

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

Hao Zhu created DRILL-1741:
------------------------------

             Summary: kvgen does not work with nested map/unions
                 Key: DRILL-1741
                 URL: https://issues.apache.org/jira/browse/DRILL-1741
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Drill
    Affects Versions: 0.7.0
            Reporter: Hao Zhu


Tested on latest 0.7.0.

kvgen function does not work well with nested maps/unions.

1. This works fine:
{code}
$ cat test_work.json
{
  "data" : {
    "col1" :  "aaa"
  }
}
{code} 
{code} 
0: jdbc:drill:zk=local> select kvgen(tab.data) from `test_work.json` tab;
+------------+
|   EXPR$0   |
+------------+
| [{"key":"col1","value":"aaa"}] |
+------------+
1 row selected (0.034 seconds)
{code} 

2. This failed:
{code}
$ cat test7.json
{
  "data" : {
    "col1" : {
      "one" : "aaa" 
    }
  }
}

{code}
{code}
0: jdbc:drill:zk=local> select kvgen(tab.data) from `test7.json` tab;
+------------+
|   EXPR$0   |
+------------+
Query failed: Failure while running fragment., Mappify does not support input of type: MAP [ d2bfea52-9935-4d63-8ecc-52315a3c7c7b on 10.250.0.115:31010 ]


java.lang.RuntimeException: java.sql.SQLException: Failure while executing query.
	at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2514)
	at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
	at sqlline.SqlLine.print(SqlLine.java:1809)
	at sqlline.SqlLine$Commands.execute(SqlLine.java:3766)
	at sqlline.SqlLine$Commands.sql(SqlLine.java:3663)
	at sqlline.SqlLine.dispatch(SqlLine.java:889)
	at sqlline.SqlLine.begin(SqlLine.java:763)
	at sqlline.SqlLine.start(SqlLine.java:498)
	at sqlline.SqlLine.main(SqlLine.java:460)

{code}



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