# Sequel Deprecation warning

**URL:** <https://discuss.elastic.co/t/sequel-deprecation-warning/88287>\
**Category:** Logstash\
**Created:** [June 5, 2017, 2:43pm UTC](https://discuss.elastic.co/t/sequel-deprecation-warning/88287 "2017-06-05T14:43:31Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![dwjvaughan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dwjvaughan/32/10648_2.png) [@dwjvaughan](https://discuss.elastic.co/u/dwjvaughan)\
**Post date:** [June 5, 2017, 2:43pm UTC](https://discuss.elastic.co/t/sequel-deprecation-warning/88287/1 "2017-06-05T14:43:31Z")

</div>

Hi all,

Have recently upgraded logstash to 5.3.2 and I'm now getting this warning:

```
SEQUEL DEPRECATION WARNING: Database#identifier_output_method= is deprecated and will be removed in Sequel 5. Explicitly load the identifier_mangling extension if you would like to use this.
/usr/share/logstash/vendor/bundle/jruby/1.9/gems/sequel-4.45.0/lib/sequel/extensions/_deprecated_identifier_mangling.rb:27:in `identifier_output_method='
/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-jdbc-4.1.3/lib/logstash/plugin_mixins/jdbc.rb:181:in `prepare_jdbc_connection'
/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-jdbc-4.1.3/lib/logstash/inputs/jdbc.rb:191:in `register'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:257:in `register_plugin'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:268:in `register_plugins'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:268:in `each'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:268:in `register_plugins'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:412:in `start_inputs'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:312:in `start_workers'
/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:207:in `run'

```

My input looks like this:

```
input {
  jdbc {
    jdbc_driver_library => "/etc/elasticsearch-jdbc/lib/ojdbc7.jar"
    jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
    jdbc_connection_string => "${DB_STRING}"
    jdbc_user => "${DB_USER}"
    jdbc_password => "${DB_PASSWORD}"
    jdbc_fetch_size => 1000
    statement_filepath => "${ES_SQL}"
    parameters => { "update_date" => "${LAST_UPDATE}" }
    lowercase_column_names => false
  }
}

```

I have a feeling it's something to do with `lowercase_column_names => false` but I'm not sure how to fix it. Any suggestions?

Many thanks,  
Dave

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 3, 2017, 2:43pm UTC](https://discuss.elastic.co/t/sequel-deprecation-warning/88287/2 "2017-07-03T14:43:57Z")

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Closed on July 3, 2017, 2:43pm UTC

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