I tried to find what these dots mean but couldn’t find it. The code seem to work, but maybe is there some problem hidden?

Is it possble to use something similiar to string_split in LookML to get unique value for my filters?I have a table that looks like this: id Column1 Column2 12 dog, cat apple, pear 23 dog cherry, apple 34 cat, deer cherry I want to create filter usin...