We help IT Professionals succeed at work.
Get Started

MySQL Trigger

bundles35 asked
Last Modified: 2016-09-15
First, let me start off by saying I do not like the use of Triggers.  That said, I do not know of any other option at this point.  I need a temporary solution to the following problem and came up with the use of a Trigger.

The issue I have is I am calling an API and sending a request that will insert the following information into a mysql table.  The API is limited and does not allow one of the columns fields to accept what I need.  The data inserted comes in as -2 everytime and I need the data to be set from a related table. I though a Before Insert Trigger based on if the field = -2.  The field would then be set with information from the related table based on the matching field.  Here is some more info to clarify this:

Table 1 (Data being Inserted)
field 1 = "name"
field 2 = "-2"

Table 2
field 1 ="name" (matches field 1 on table 1)
field 2 = "75"

When an INSERT is performed, the Trigger will replace the incoming -2 data and use the related info from Table 2, field 2 using field 1 as a match.

I hope this information is enough for someone trying to help with this.  I am having trouble figuring if this should be a BEFORE or AFTER Trigger as well as limiting it to working when field2 on Table 1 is = -2.

This is also temporary until the API being used can accept Field 2 as a variable on the original request.
Watch Question
Enterprise Business Process Architect
This problem has been solved!
Unlock 1 Answer and 8 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE