Jmeter: Capture JDBC value in global variable

Question

I'm very new to Jmeter and I'd like to know if there is some way to store the result of a query in a global variable to use in a different thread.

In other words, I need a set-up thread that sets a start-date and end-date (2 values) from the DB. Then, in a second thread (the main thread), I have to use the start-date and end-date as parameters for the tests.

Is this possible?

Thanks in advance!, Nahuel

Answer 1

Use the following elements:

• JDBC_Connection_Configuration

• JDBC Request

• BeanShell Sampler

• setUp Thread Group

Organize them as following:

It will work as following:

1. JDBC Connection Configuration will setup the connection to DB, name Variable name so that it matches Variable name of JDBC Request, in my case I name it conn

2. Setup Thread Group will run query through JDBC Request and store result in variables

3. Beanshell sampler with use the value and store it as a property so it can be shared by all threads.

Note the following:

• The variable names of JDBC Request must match the number of columns returned by your SQL Query, note in example I have 3 columns, I put 3 variables, and will use clt_nom_1 name as I ensure there is only row returned by query

  • In Bean Shell sampler I put the following code:

    props.put("toto",vars.get("clt_nom_1"));
    

  • clt_nom_1 is named like this because it's the first row value

  • Finally in Thread Group I can use property toto through:

    ${__P(toto)}
    

You could also replace BeanShell sampler by a debug sampler named:

${__setProperty(toto,${clt_nom_1})};

which would store variable in property