Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/422#issuecomment-99936194
@hyunsik, thanks for your nice work. I've left some trivial comments.
In addition, I met an error while running an example in the unit test as
follows.
```
default> create external table test (title TEXT, name RECORD (
first_name TEXT, last_name TEXT ) ) USING JSON LOCATION
'hdfs://localhost:7020/test/';
OK
default> \d
test
default> \d test
table name: default.test
table path: hdfs://localhost:7020/test
store type: JSON
number of rows: unknown
volume: 257 B
Options:
'text.serde'='org.apache.tajo.storage.json.JsonLineSerDe'
schema:
title TEXT
name RECORD (first_name TEXT, last_name TEXT)
default> select * from test;
ERROR: java.lang.NullPointerException
```
Here is the log.
```
2015-05-08 01:47:37,239 INFO org.apache.tajo.master.GlobalEngine: Query:
select * from test
2015-05-08 01:47:37,323 ERROR org.apache.tajo.master.GlobalEngine:
Stack Trace:
java.lang.NullPointerException
at
org.apache.tajo.catalog.DDLBuilder.buildSchema(DDLBuilder.java:76)
at
org.apache.tajo.catalog.SchemaUtil.toDisplayString(SchemaUtil.java:161)
at org.apache.tajo.catalog.TypeDesc.toString(TypeDesc.java:66)
at org.apache.tajo.catalog.Column.toString(Column.java:159)
at java.lang.String.valueOf(String.java:2847)
at java.lang.StringBuilder.append(StringBuilder.java:128)
at org.apache.tajo.catalog.Schema.toString(Schema.java:503)
at
org.apache.tajo.plan.logical.ScanNode.getPlanString(ScanNode.java:246)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitScan(ExplainLogicalPlanVisitor.java:195)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitScan(ExplainLogicalPlanVisitor.java:32)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:108)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitUnaryNode(ExplainLogicalPlanVisitor.java:130)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitProjection(ExplainLogicalPlanVisitor.java:88)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitProjection(ExplainLogicalPlanVisitor.java:32)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:69)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitRoot(ExplainLogicalPlanVisitor.java:81)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.visitRoot(ExplainLogicalPlanVisitor.java:32)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:60)
at
org.apache.tajo.plan.visitor.ExplainLogicalPlanVisitor.getBlockPlanStrings(ExplainLogicalPlanVisitor.java:74)
at
org.apache.tajo.plan.LogicalPlan.getLogicalPlanAsString(LogicalPlan.java:344)
at
org.apache.tajo.plan.LogicalPlan.getQueryGraphAsString(LogicalPlan.java:334)
at org.apache.tajo.plan.LogicalPlan.toString(LogicalPlan.java:366)
at
org.apache.tajo.master.GlobalEngine.createLogicalPlan(GlobalEngine.java:275)
at
org.apache.tajo.master.GlobalEngine.executeQuery(GlobalEngine.java:186)
at
org.apache.tajo.master.TajoMasterClientService$TajoMasterClientProtocolServiceHandler.submitQuery(TajoMasterClientService.java:287)
```
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
