Chao created HIVE-9113:
--------------------------
Summary: Explain on subquery failed with NPE
Key: HIVE-9113
URL: https://issues.apache.org/jira/browse/HIVE-9113
Project: Hive
Issue Type: Bug
Components: Query Processor
Reporter: Chao
Run explain on the following query:
{noformat}
select p.p_partkey, li.l_suppkey
from (select distinct l_partkey as p_partkey from lineitem) p join lineitem li
on p.p_partkey = li.l_partkey
where li.l_linenumber = 1 and
li.l_orderkey in (select l_orderkey where l_linenumber = li.l_linenumber)
;
{noformat}
gave me NPE:
{noformat}
java.lang.NullPointerException
at
org.apache.hadoop.hive.ql.parse.QBSubQuery.validateAndRewriteAST(QBSubQuery.java:516)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genFilterPlan(SemanticAnalyzer.java:2605)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genBodyPlan(SemanticAnalyzer.java:8866)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9745)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:9638)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10125)
at
org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:221)
at
org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:74)
at
org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:221)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:420)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:306)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1108)
at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1170)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1045)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1035)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:199)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:151)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:362)
at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:720)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:639)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:578)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
{noformat}
Is this query not valid? If so, it should at least give some explanations, not
just a plain NPE message, and left user clueless.
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