crate
support --value/--argument param for use with --execute
at the moment, there is no way to safely interpolate values into SQL that is passed into crash on the command-line for execution. the only way to do it is via shell string interpolation
it would be good if crash supported something like --variable=assignment ala the psql client (cf. https://www.postgresql.org/docs/9.5/app-psql.html)
at the moment, I have to warn users not to attempt something like this in production, even though it's handy for use in tutorials. see the WARNING note here: https://crate.io/docs/crate/tutorials/en/latest/generate-time-series/cli.html#record-the-iss-position
I think this'd be a nice idea, we could also support the \set syntax like psql does during an interactive session for a similar purpose.
