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Domo Knowledge Base

MySQL Connector

Version 35

 

Intro

MySQL is a widely used open-source relational database management system. You can use Domo's MySQL Connector to pull data from your MySQL database and compile custom reports. You indicate the data you want by inputting an SQL query. For more information about the MySQL API, visit their website. (http://dev.mysql.com/doc/refman/5.0/en/c-api.html)

The MySQL connector is a "Database" connector, meaning it retrieves data from a database using a query. In the Data Center, you can access the connector page for this and other Database connectors by clicking Database in the toolbar at the top of the window.

You connect to your MySQL database in the Data Center. This topic discusses the fields and menus that are specific to the MySQL connector user interface. General information for adding DataSets, setting update schedules, and editing DataSet information is discussed in Adding a DataSet Using a Data Connector.

Notes: 

  • This connector supports TLS IF your MySQL server supports TLS.

  • Non SSL connections are not supported. If no certificate is provided, the connection is still SSL but without any certificate authentication. The connection will trust all server certificates. Refer to the following link for details : https://msdn.microsoft.com/en-us/library/bb879949%28v=sql.110%29.aspx

 

Primary Use Cases

Pulling data mart and data warehouse SQL queries

Primary Metrics

N/A

Primary Company Roles

  • CIO

  • CTO

Average Implementation Time

5-40+ hours

Ease of Use (on a 1-to-10 scale with 1 being easiest)

7

Video - Connecting to MySQL

 

 

Best Practices

  • Limit the results set size is much as possible.

  • Keep the number of columns to a minimum.

Prerequisites

To connect to a MySQL database and create a DataSet, you must have the following:

  • The username and password you use to log into your MySQL database

  • The host name for the database

  • The port number for the database

  • The database name or schema name

  • The SQL query you will use to pull data

  • SSL

You can also include the URL where your SSL CA Certificate is located, though this is optional.

Creating MySQL Accounts

You can create MySQL accounts two ways:

  • By using account management statements intended for creating accounts and establishing their privileges, such as CREATE USER and GRANT. These statements cause the server to make appropriate modifications to the underlying grant tables.

  • By manipulating the MySQL grant tables directly with statements such as INSERT, UPDATE, or DELETE.

The preferred method is to use account management statements because they are more concise and less error-prone than manipulating the grant tables directly.

Another option for creating accounts is to use the GUI tool MySQL Workbench. Also, several third-party programs offer capabilities for MySQL account administration, such as phpMyAdmin.

Whitelisting

Before you can connect to a MySQL database, you must also whitelist a number of IP addresses on your database server on the port you want to connect to. For the full list of IP addresses, see Whitelisting IP Addresses for Connectors.

Connecting to Your MySQL Database

This section enumerates the options in the Credentials and Details panes in the MySQL Connector page. The components of the other panes in this page, Scheduling and Name & Describe Your DataSet, are universal across most connector types and are discussed in greater length in Adding a DataSet Using a Data Connector.

Note: When using the copy/paste function for your credentials, ensure there is no whitespace at the beginning or end of the string. By accidentally pasting whitespace, it will cause the connector to error when trying to connect.

Credentials Pane

This pane contains fields for entering credentials to connect to your database. The following table describes what is needed for each field:  

Field

Description

Host

Enter the host name for the SQL database. For example: db.company.com

Database Name

Enter the name of the SQL database or schema.

Username

Enter your MySQL username.

Password

Enter your MySQL password.

CA Certificate

Enter the URL where the SSL Ca Certificate is located (optional).

Port

Enter the port number for the database.

Once you have entered valid MySQL credentials, you can use the same account any time you go to create a new MySQL DataSet. You can manage connector accounts in the Accounts tab in the Data Center. For more information about this tab, see Managing User Accounts for Connectors.

Details Pane

In this pane you create an SQL query to pull data from your database, with or without a parameter.

Menu

Description

Query Type

Select the desired MySQL query type—either with or without a parameter.

Query

Enter the Structured Query Language (SQL) query to use in selecting the data you want. For example:

select * from Employee

You can use the Query Helper parameter to help you write a usable SQL query. To use the Query Helper, do the following:

  1. Select your database table and table columns in the appropriate menus.

  2. Copy the SQL statement that appears in the Query Helper field.

  3. Paste the copied SQL statement into the Query field.

 

Query Parameter

Enter the query parameter value. This is the initial value for the query parameter. You can use this option to retrieve new data since the last run. 

For example, if you entered the following query in the Query field...

select * from test.lastValue where id <= !{lastvalue:id}! order by id desc

...and then entered the following for the Query Parameter...

!{lastvalue:id}!=3

...then the first run would return 3 rows, and all subsequent runs would return 1 row, and the results would be ordered from largest to smallest. 

Similarly, if you entered the following in the Query field...

select * from test.lastValue where time > !{lastrundate:time}!

...and then entered the following for the Query Parameter...

!{lastrundate:time}!=01/01/1990

...then the first run would return 5 rows and all subsequent runs would return 0 rows.

TinyInt Values Treated as Boolean Values?

Select Yes if you want TinyInt values to be treated as Boolean.

Cast Boolean Values To...

Select whether Boolean values will be cast to integers or strings.

Database Tables (Optional)

Select the database table you want to import into Domo. 

Table Columns (Optional)

Select the table columns you want to import into Domo.

Query Helper (Optional) 

Copy and paste the SQL statement in this field into the Query field. For more information, see Query, above.

 

Other Panes

For information about the remaining sections of the connector interface, including how to configure scheduling, retry, and update options, see Adding a DataSet Using a Data Connector.

Troubleshooting

  • Verify the credentials using MySQL Workbench.

  • Confirm the server supports encrypted connections.

  • Confirm the Domo IPs are whitelisted.

  • To speed up your runtime, make sure the tables you are joining don't have duplicate column names and that you call each column only once.