[TAJO-1675] NPE when selecting data from information_schema.partition_keys

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: Catalog
• Assignee: JaeHwa Jung
• Reporter: Jihoon Son
• Created: 06/Jul/15 09:16
• Updated: 08/Sep/15 06:07
• Resolved: 08/Sep/15 04:54

Description

See the title.
You can reproduce as follows.

default> create table partitioned_nation (n_name text, n_comment text) partition by column (n_nationkey int8, n_regionkey int8) ;
OK
default> insert into partitioned_nation select * from nation;

default> \d partitioned_nation

table name: default.partitioned_nation
table uri: hdfs://localhost:7020/tajo/warehouse/default/partitioned_nation
store type: CSV
number of rows: 0
volume: 0 B
Options: 
	'text.delimiter'='|'

schema: 
n_name	TEXT
n_comment	TEXT

Partitions: 
type:COLUMN
columns::n_nationkey (INT8), n_regionkey (INT8)
default> \c information_schema
You are now connected to database "information_schema" as user "jihoonson".
information_schema> select * from partition_keys;
partition_id,  column_name,  partition_value
-------------------------------
ERROR: java.lang.NullPointerException
java.sql.SQLException: java.lang.NullPointerException
	at org.apache.tajo.jdbc.TajoResultSetBase.next(TajoResultSetBase.java:717)
	at org.apache.tajo.cli.tsql.DefaultTajoCliOutputFormatter.printResult(DefaultTajoCliOutputFormatter.java:105)
	at org.apache.tajo.cli.tsql.TajoCli.localQueryCompleted(TajoCli.java:558)
	at org.apache.tajo.cli.tsql.TajoCli.executeQuery(TajoCli.java:532)
	at org.apache.tajo.cli.tsql.TajoCli.executeParsedResults(TajoCli.java:447)
	at org.apache.tajo.cli.tsql.TajoCli.runShell(TajoCli.java:419)
	at org.apache.tajo.cli.tsql.TajoCli.main(TajoCli.java:692)
Caused by: java.io.IOException: java.lang.NullPointerException
	at org.apache.tajo.jdbc.FetchResultSet.nextTuple(FetchResultSet.java:80)
	at org.apache.tajo.jdbc.TajoResultSetBase.next(TajoResultSetBase.java:711)
	... 6 more
Caused by: com.google.protobuf.ServiceException: java.lang.NullPointerException
	at org.apache.tajo.client.QueryClientImpl.fetchNextQueryResult(QueryClientImpl.java:360)
	at org.apache.tajo.client.TajoClientImpl.fetchNextQueryResult(TajoClientImpl.java:134)
	at org.apache.tajo.jdbc.FetchResultSet.nextTuple(FetchResultSet.java:62)
	... 7 more

Issue Links

• relates to: TAJO-1824 Remove partition_keys table from information_schema