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Posted to dev@phoenix.apache.org by "Swaroopa Kadam (JIRA)" <ji...@apache.org> on 2019/01/03 22:11:00 UTC
[jira] [Assigned] (PHOENIX-5087) Inner Join Cursor Query fails with
NullPointerException - JoinCompiler.java:187
[ https://issues.apache.org/jira/browse/PHOENIX-5087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Swaroopa Kadam reassigned PHOENIX-5087:
---------------------------------------
Assignee: Swaroopa Kadam
> Inner Join Cursor Query fails with NullPointerException - JoinCompiler.java:187
> -------------------------------------------------------------------------------
>
> Key: PHOENIX-5087
> URL: https://issues.apache.org/jira/browse/PHOENIX-5087
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.14.1
> Reporter: Jack Steenkamp
> Assignee: Swaroopa Kadam
> Priority: Major
> Attachments: PhoenixInnerJoinCursorTest.java
>
>
> I have come across an inner join query in my application that fails with the NullPointerException if executed as part of a Cursor, but executes fine if done without it.
>
> To reproduce this issue, you can run the attached program (assuming you update the JDBC_URL to point to an instance you have running) or you can follow the steps below:
>
> Create the Table:
>
> CREATE TABLE IF NOT EXISTS MY_STATS
> (
> ID VARCHAR NOT NULL,
> ENTRY_NAME VARCHAR ,
> ENTRY_VALUE DOUBLE ,
> TRANSACTION_TIME TIMESTAMP ,
> CONSTRAINT pk PRIMARY KEY(ID)
> )
> IMMUTABLE_STORAGE_SCHEME=ONE_CELL_PER_COLUMN,
> UPDATE_CACHE_FREQUENCY=900000,
> COLUMN_ENCODED_BYTES=NONE,
> IMMUTABLE_ROWS=true
>
> Execute a normal query (this works fine):
>
> SELECT * FROM MY_STATS
> INNER JOIN
> (
> SELECT ENTRY_NAME, MAX(TRANSACTION_TIME) AS TRANSACTION_TIME
> FROM MY_STATS
> GROUP BY ENTRY_NAME
> ) sub
> ON MY_STATS.ENTRY_NAME = sub.ENTRY_NAME AND MY_STATS.TRANSACTION_TIME = sub.TRANSACTION_TIME
> ORDER BY MY_STATS.TRANSACTION_TIME DESC
>
> Now if you execute the same query, but with the cursor declaration at the top -
>
> DECLARE MyCursor CURSOR FOR
>
> It produces the following exception:
>
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.phoenix.compile.JoinCompiler$JoinTableConstructor.resolveTable(JoinCompiler.java:187)
> at org.apache.phoenix.compile.JoinCompiler$JoinTableConstructor.visit(JoinCompiler.java:224)
> at org.apache.phoenix.compile.JoinCompiler$JoinTableConstructor.visit(JoinCompiler.java:181)
> at org.apache.phoenix.parse.DerivedTableNode.accept(DerivedTableNode.java:49)
> at org.apache.phoenix.compile.JoinCompiler$JoinTableConstructor.visit(JoinCompiler.java:201)
> at org.apache.phoenix.compile.JoinCompiler$JoinTableConstructor.visit(JoinCompiler.java:181)
> at org.apache.phoenix.parse.JoinTableNode.accept(JoinTableNode.java:81)
> at org.apache.phoenix.compile.JoinCompiler.compile(JoinCompiler.java:138)
> at org.apache.phoenix.compile.QueryCompiler.compileSelect(QueryCompiler.java:190)
> at org.apache.phoenix.compile.QueryCompiler.compile(QueryCompiler.java:153)
> at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableSelectStatement.compilePlan(PhoenixStatement.java:490)
> at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableDeclareCursorStatement.compilePlan(PhoenixStatement.java:950)
> at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableDeclareCursorStatement.compilePlan(PhoenixStatement.java:941)
> at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:401)
> at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:391)
> at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
> at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:390)
> at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:378)
> at org.apache.phoenix.jdbc.PhoenixStatement.execute(PhoenixStatement.java:1825)
> at com.jsteenkamp.phoenix.PhoenixInnerJoinCursorTest.testCursorQuery(PhoenixInnerJoinCursorTest.java:68)
> at com.jsteenkamp.phoenix.PhoenixInnerJoinCursorTest.main(PhoenixInnerJoinCursorTest.java:20)
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