Creating Missing Indexes for Retain Tables

I'm missing an index in one of the Retain database tables and it is affecting my archive job speeds.  How do I create the index?

DISCLAIMER:
This knowledge base (KB) article is provided for informational purposes only and as a courtesy service to you, our customer. GWAVA Technical Support does not have any database administration (DBA) expertise, nor does it provide DBA services or support. GWAVA is not responsible for the results of implementing any of the concepts contained in this KB article. Implementation of any of the concepts suggested in this KB article shall be done entirely at your own and sole risk, and GWAVA does not provide any kind of warranties whatsoever resulting from your decision of implementing any of the KB article’s concepts. It is up to you to do any research and to ensure yourself that any implementation and setup of any of the KB article’s concepts in your database system is correctly and properly executed. It is imperative that you have backups of your database system and storage directory before making any implementation. If you don’t have any DBA expertise, you should consult with a DBA expert before any implementation of the KB article’s concepts.  Under no circumstances, shall GWAVA, or any of its employees, be liable, in contract, tort, delict or otherwise, whether negligence is provable or not, for any direct, indirect, incidental, special, punitive, consequential or other damages, loss, cost or liability whatsoever that would result from or are related to the implementation of any of the concepts suggested in the KB article.

To the extent permitted by applicable law, GWAVA shall not be liable to you for any special, consequential, direct, indirect or similar damages, including any loss of data, arising out from migrating any type of messages, attachments, database, metadata in your Retain system to another server and/or location.

Resolution:
If any are missing, they can be created as follows, depending on which one is missing.  Only issue the command for the missing index.  Before making ANY change to your database, you - of course - should back it up. This can be done through a dump of the MySQL database, which is the recommended method; otherwise, back up the disk that contains the datadir.

Or, in the case of MS SQL, you can back up the database from within the SQL Server Management Studio.
MySQL

CREATE INDEX [Key_name] ON [retain database name].[table name] ([Column_name]);

EXAMPLE:

CREATE INDEX idx_hash_d ON retain.t_document (hash);

MS SQL

CREATE nonclustered INDEX [name of index] ON [retain database name].dbo.[table name] ([Column_name]);

EXAMPLE:

CREATE nonclustered INDEX idx_hash_d ON retain.dbo.t_document (hash);

See postgres manual

This article was originally published in the GWAVA knowledgebase as article ID 2515.