This is the opposite question to this one: Creating columns in PostGIS using osm2pgsql hstore tags
First, I changed default.style to make separate 'lanes' column. Then I extracted osm database using osm2pgsql with --hstore.
Now I want to have 'lanes' column moved to tags instead of separate column. How to do this?
UPDATE table SET tags->'lanes' = lanes;
After this I would like to restore default.style to default (without lanes column), so that next data will be extracted in my desired form.