Upgrade to SqlLine 1.7.0 after its officially released.
Major improvements is that Drill Sqlline prom will change from the default 0: jdbc:drill:zk=local> to apache drill> if schema is unset. If schema was set (ex: use dfs.tmp), prompt will look the following way: apache drill (dfs.tmp)>.
To return to previous prompt display, user can modify drill-sqlline-override.conf and set drill.sqlline.prompt.with_schema to false.
To set custom prompt user can use one of the SqlLine properties: prompt, promptScript, rightPrompt.
This can be achieved using set command, example: !set prompt my_prompt), or these properties can be overridden in drill-sqlline-override.conf.