In order to To use the screen values for a field in the data source, you have to add it as dependent field ( from the field configuration → > Dependencies).  

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 ExampleExample: Let's suppose say we have two custom fields: one KCF  PCF-PRO - Single Autocomplete (let's name it "Continent") and one KCF ) and PCF-PRO - Multiple Autocomplete (let's name it "Countries"), the second one is populated depending on the value of the first one.

An easy example would beis following: we have a table ( "countries")  table with two columns: country and continent. Our first field will select the continents and the second one will contain the countries from that continent.

You can see the corresponding data sources below: 

The The following data source for represents the first custom field:   

select distinct continent from countries;

 The The following data source for represents the second custom field:   

select country from countries where continent = {customfield_10800}

In The following result will be in the issue view screen, the result will look like this: 

...

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See also

• Power Scripts for Jira
• PCF-PRO - Multiple Autocomplete
  
• PCF-PRO - Single Autocomplete