[jira] Commented: (DERBY-3664) Trailing white space in varchar field is trimmed off.

["Bryan Pendleton (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-3664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594456#action_12594456 ] 

Bryan Pendleton commented on DERBY-3664:
----------------------------------------

I believe that this behavior of VARCHAR datatypes is documented:
http://db.apache.org/derby/docs/10.4/ref/rrefsqlj41207.html

  When comparison boolean operators are applied to VARCHARs, 
  the lengths of the operands are not altered, and spaces at the 
  end of the values are ignored.

> Trailing white space in varchar field is trimmed off.
> -----------------------------------------------------
>
>                 Key: DERBY-3664
>                 URL: https://issues.apache.org/jira/browse/DERBY-3664
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.1.4, 10.3.2.1, 10.4.1.3
>         Environment: Win XP, Derby 10.4.1.3
>            Reporter: Shawn Aucoin
>
> When executing an insert statement with a varchar field containing trailing whitespace, the trailing whitespace is removed.  This results in unique constraint issues.  If  index is not unique, select * from login where login = 'first_test'  will return both records.  Preceeding whitespace doesn't appear to be affected.  I tested this from IJ and from java api.  I included an example below
> CREATE TABLE LOGIN
> (
> 	LOGIN_ID INT PRIMARY KEY,
> 	LOGIN VARCHAR(60)
> );
> CREATE UNIQUE INDEX LOGIN_LOGIN_IDX 
> ON LOGIN (LOGIN DESC);
> insert into login (LOGIN_ID, LOGIN) values (1, 'first_test');
> insert into login (LOGIN_ID, LOGIN) values (2, 'first_test ');
> Now, i fully admit that there is no logical reason for trailing whitespace, but it is client data that i am dealing with and I may not be able to get it changed.  Thanks, derby is a sweet product!

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