Skip to main content

Setting MySQL to Allow Multiple Statements In a Single Query In JDBC/OpenBD

This came up in a discussion on the OpenBD Google Group today so I figured it was worth a quick blog post.

Depending on what you're doing with MySQL you may be in a situation where you need to run multiple SQL statements separated by a ; as part of a single query. By default this isn't enabled in the JDBC connection with MySQL, but it's easy to enable in your JDBC connection string.

When creating a MySQL datasource in the OpenBD admin, click on the "Advanced Settings" button, and in the "Connection String" box input the following text:
allowMultiQueries=true

If you're creating the datasource for the first time this will be all you need to do, but if you're adding this to an existing datasource you'll want to bounce OpenBD to make sure the connection pool is cleared out.

To test that the setting change worked, simply write a CFQUERY that contains two statements:
<cfquery name="foo" datasource="foo">
SELECT * FROM foo;
SELECT * FROM bar;
</cfquery>

If that doesn't throw an error, then you're all set to run multiple statements in the same CFQUERY tag.
Note that you can enable this setting in bluedragon.xml as well, just make sure your <connectstring> node for your datasource looks like this:
<connectstring>allowMultiQueries=true</connectstring>

And your <hoststring> node should look something like this:
<hoststring>jdbc:mysql://server:port/database?cacheResultSetMetaData=false&amp;autoReconnect=true&amp;allowMultiQueries=true</hoststring>

Comments

Popular posts from this blog

Running a Django Application on Windows Server 2012 with IIS

This is a first for me since under normal circumstances we run all our Django applications on Linux with Nginx, but we're in the process of developing an application for another department and due to the requirements around this project, we'll be handing the code off to them to deploy. They don't have any experience with Linux or web servers other than IIS, so I recently took up the challenge of figuring out how to run Django applications on Windows Server 2012 with IIS.

Based on the dated or complete lack of information around this I'm assuming it's not something that's very common in the wild, so I thought I'd share what I came up with in case others need to do this.


This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Assumptions and CaveatsThe operating system is Windows Server 2012 R2, 64-bit. If another variant of the operating system is being used, these instructions may not work properly.All of the soft…

Installing and Configuring NextPVR as a Replacement for Windows Media Center

If you follow me on Google+ you'll know I had a recent rant about Windows Media Center, which after running fine for about a year suddenly decided as of January 29 it was done downloading the program guide and by extension was therefore done recording any TV shows.

I'll spare you more ranting and simply say that none of the suggestions I got (which I appreciate!) worked, and rather than spending more time figuring out why, I decided to try something different.

NextPVR is an awesome free (as in beer, not as in freedom unfortunately ...) PVR application for Windows that with a little bit of tweaking handily replaced Windows Media Center. It can even download guide data, which is apparently something WMC no longer feels like doing.

Background I wound up going down this road in a rather circuitous way. My initial goal for the weekend project was to get Raspbmc running on one of my Raspberry Pis. The latest version of XBMC has PVR functionality so I was anxious to try that out as a …

Fixing DPI Scaling Issues in Skype for Business on Windows 10

My setup for my day job these days is a Surface Pro 4 and either an LG 34UC87M-B or a Dell P2715Q monitor, depending on where I'm working. This is a fantastic setup, but some applications have trouble dealing with the high pixel density and don't scale appropriately.
One case in point is Skype for Business. For some reason it scales correctly as I move between the Surface screen and the external monitor when I use the Dell, but on the LG monitor Skype is either massive on the external monitor, or tiny on the Surface screen.
After a big of digging around I came across a solution that worked for me, which is to change a setting in Skype's manifest file (who knew there was one?). On my machine the file is here: C:\Program Files\Microsoft Office\Office16\LYNC.EXE.MANIFEST
And the setting in question is this:
<dpiAware>True/PM</dpiAware>
Which I changed to this: <dpiAware>False/PM</dpiAware>
Note that you'll probably have to edit the file as administr…