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https://issues.apache.org/jira/browse/TRAFODION-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16550251#comment-16550251
]
ASF GitHub Bot commented on TRAFODION-3136:
-------------------------------------------
GitHub user zlei929 opened a pull request:
https://github.com/apache/trafodion/pull/1654
[TRAFODION-3136] Bug fixed: If position is a negative value, the result
does not match expectations.
**Before this, the result of below SQL are incorrect:**
>> select split_part('aaabbcc', 'bb', -2) from dual;
(EXPR)
------
--- 1 row(s) selected. (error)
**for now,**
>> select split_part('aaabbcc', 'bb', -2) from dual;
*** ERROR[8691] Field position must be greater than zero, currently is -2.
--- 0 row(s) selected.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zlei929/trafodion TRAFODION-3136
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/trafodion/pull/1654.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1654
----
commit 153368d2d1e1f6f5e279ded0e6d4902bba43a498
Author: zlei929 <z_lei929@...>
Date: 2018-07-20T04:18:28Z
modified: ../generator/GenPreCode.cpp
modified: ../optimizer/ItemFunc.h
commit b054192046526e9569214f9305ba98d27595358d
Author: zlei929 <z_lei929@...>
Date: 2018-07-20T05:10:30Z
modified: core/sql/regress/core/EXPECTED038.LINUX
modified: core/sql/regress/core/TEST038
----
> Improve on split_part builtin-function
> --------------------------------------
>
> Key: TRAFODION-3136
> URL: https://issues.apache.org/jira/browse/TRAFODION-3136
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: zhang.lei
> Assignee: zhang.lei
> Priority: Major
>
> {color:#FF0000}use like below descripyon:{color}
>
> >>select split_part('sa:sbl:sc', ':', 1) from t038sf;
> (EXPR)
> ---------
> sa
> --- 1 row(s) selected.
> >>select split_part('sa:sbl:sc', ':', 2) from t038sf;
> (EXPR)
> ---------
> sbl
> --- 1 row(s) selected.
> >>select split_part('sa:sbl:sc', ':', 3) from t038sf;
> (EXPR)
> ---------
> sc
> --- 1 row(s) selected.
> >>
> >>-- **ERROR**
> >>select split_part('sa:sbl:sc', ':', 0) from t038sf;
> *** ERROR[4497] The Third operand of split_part must be greater than 0
> --- 0 row(s) selected.
> >>–**EMPTY RESULT**
> >>select split_part('sa:sbl:sc', ':', 4) from t038sf;
> (EXPR)
> ---------
>
> --- 1 row(s) selected.
>
> >> create table T038sf(a int, b char(10), c varchar(30));
> >>insert into T038sf values(110, 'a/b/c', 'sa/dsd/s');
> --- 1 row(s) inserted.
> >>insert into T038sf values(111, 'sasd', 'dsa:/~sd');
> --- 1 row(s) inserted.
> >>insert into T038sf values(112, '#$%$#@', 'dsasggggsad');
> --- 1 row(s) inserted.
> >>insert into T038sf values(114, 'a', '这是^中文：测试');
> --- 1 row(s) inserted.
> >>select split_part(c, '/', 2) from t038sf;
> (EXPR)
> ------------------------------
> dsd
> ~sd
>
>
> --- 4 row(s) selected.
> >>select split_part(c, 'ggg', 2) from t038sf;
> (EXPR)
> ------------------------------
>
> gsad
> --- 4 row(s) selected.
> >>select split_part(c, 'sd', 1) from t038sf;
> (EXPR)
> ------------------------------
> sa/d
> dsa:/~
>
>
> --- 4 row(s) selected.
>
> >>select split_part(c, '：', 1) from t038sf;
> (EXPR)
> ------------------------------
>
> 这是^中文
> --- 4 row(s) selected.
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