customfield value in table grid next gen

[g.mebonia]

Hello People, I am using table grid nex ge in my jira service management. in issue type I have customfield ( single select ) and in my table grid data source i am using postgreSQL query search "" SELECT * FROM public.Item WHERE environment ~ E'^\\d+$' ""  how can i achieve that expand my query like this : - " SELECT * FROM public.Item WHERE environment ~ E'^\\d+$' AND category "customfield:selectedin issue). i want to put varible which costumfields selected value to parse data  

[Chu Dam]

Hi @g.mebonia 

You can find the related documentation here: https://tablegrid.atlassian.net/wiki/spaces/TGNG/pages/1933710/Jira+values+placeholders

Table Grid Next Generation supports placeholders to query Jira values.Jira values can be used to initialize the grid with data, as dynamic options or as a default value in a grid column.

I hope this help. 
Dam.