Editor - PHP Backend - set getValue from another column

Hi, I am using php backend for Editor. I have a table with a CLOB. CLOBs are not supported. Hence I am trying to read and write the CLOB separately.

My table columns:
ID, TEXT, TEXT_CLOB

In Fileds I have defined only the ID and TEXT.

All works fine.

Can I now use for Field TEXT a formatter and read from TEXT_CLOB with my own DB query? My problem is, that the getFormatter dos not know which row is processed. I would need the ID, then I can read from TEXT_CLOB and return that value.

Same I would need for setValue.

In alternative I was trying to do this in ->on('postGet', but as far as I can see, I cannot modify here the data wich will be returned to the client. Same for ->on('beforeUpdate' etc., Can I modify the data before it is used to update the DB?