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ASF GitHub Bot logged work on TRAFODION-3296: --------------------------------------------- Author: ASF GitHub Bot Created on: 10/Apr/19 23:15 Start Date: 10/Apr/19 23:15 Worklog Time Spent: 10m Work Description: Traf-Jenkins commented on issue #1828: [TRAFODION-3296] Fix handling of [first n] + ORDER BY subqueries URL: https://github.com/apache/trafodion/pull/1828#issuecomment-481901985 Check Test Started: https://jenkins.esgyn.com/job/Check-PR-master/3190/ ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 225881) Time Spent: 20m (was: 10m) > Subquery with [first n] + ORDER BY gives wrong answer > ----------------------------------------------------- > > Key: TRAFODION-3296 > URL: https://issues.apache.org/jira/browse/TRAFODION-3296 > Project: Apache Trafodion > Issue Type: Bug > Reporter: David Wayne Birdsall > Assignee: David Wayne Birdsall > Priority: Major > Time Spent: 20m > Remaining Estimate: 0h > > The following test script illustrates the problem: > {quote}?section setup > drop table if exists t1; > drop table if exists t2; > create table t1 (val integer); > create table t2 (val integer); > insert into t1 values(994707150),(1923979352),(-1865644273); > insert into t2 select * from t1; > ?section testit > select [first 1] val from t2 order by val; > prepare xx from select val from t1 where val in (select [first 1] val from t2 > order by val); > explain options 'f' xx; > -- should return -1865644273, but returns something different > execute xx; > {quote} > When run, the script shows: > {quote}>>?section testit > >> > >>select [first 1] val from t2 order by val; > VAL > ----------- > -1865644273 > --- 1 row(s) selected. > >> > >>prepare xx from select val from t1 where val in (select [first 1] val from > >>t2 order by val); > --- SQL command prepared. > >> > >>explain options 'f' xx; > LC RC OP OPERATOR OPT DESCRIPTION CARD > ---- ---- ---- -------------------- -------- -------------------- --------- > 5 . 6 root 1.00E+002 > 3 4 5 nested_join 1.00E+002 > . . 4 trafodion_scan T1 1.00E+002 > 2 . 3 hash_groupby 1.00E+000 > 1 . 2 firstn 1.00E+000 > . . 1 trafodion_scan T2 1.00E+002 > --- SQL operation complete. > >> > >>-- should return -1865644273, but returns something different > >>execute xx; > VAL > ----------- > 994707150 > --- 1 row(s) selected. > >> > {quote} -- This message was sent by Atlassian JIRA (v7.6.3#76005)