Macros for parameterisable queries

Create macros, which are pre-built command chains with possible variables which need to be entered. Imagine a macro foo with contents

SELECT the_date, COUNT(*) FROM some_stats WHERE YEAR(the_date) = ${year} | chart hbar | browser

Running the macro will ask for all parameters, e.g.

myterm> mrun foo
year: 12345 (entered by user)

(query output)

Could be used to create small libraries of common statistical queries, different commands to monitor health of server etc.