Rick Hillegas created DERBY-5954:
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Summary: NPE in SELECT involving subselects and windows functions
Key: DERBY-5954
URL: https://issues.apache.org/jira/browse/DERBY-5954
Project: Derby
Issue Type: Bug
Components: SQL
Affects Versions: 10.10.0.0
Reporter: Rick Hillegas
A user reports and I have verified an NPE on the following SELECT:
connect 'jdbc:derby:memory:db;create=true';
create table blah ( a int );
insert into blah values (1), (2), (3), (4), (5), (6), (7);
SELECT rn, (SELECT rn FROM (SELECT row_number() over() rn FROM blah ) as T2
where T2.rn = T1.rn+1) rn2
FROM (SELECT row_number() over() rn from blah) as T1;
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