Hornung chris.horn...@klaviyo.com
To: MySql mysql@lists.mysql.com
Sent: Monday, 23 March, 2015 18:20:36
Subject: duplicate rows in spite of multi-column unique constraint
Hello,
I'm come across a situation where a table in our production DB has a
relatively small number of duplicative rows
a trailing space or similar 'invible'
character that makes it not identical.
- Original Message -
From: Chris Hornungchris.horn...@klaviyo.com
To: MySqlmysql@lists.mysql.com
Sent: Monday, 23 March, 2015 18:20:36
Subject: duplicate rows in spite of multi-column unique constraint
Hello,
I'm
Hi Chris,
On 3/24/2015 10:07 AM, Chris Hornung wrote:
Thanks for the suggestions regarding non-printing characters, definitely
makes sense as a likely culprit!
However, the data really does seem to be identical in this case:
mysql select id, customer_id, concat('-', group_id, '-') from
Hello,
I'm come across a situation where a table in our production DB has a
relatively small number of duplicative rows that seemingly defy the
unique constraint present on that table.
We're running MySQL 5.6.19a via Amazon RDS. The table in question is
~250M rows.
`show create table`
