another question to ask yourself is whether you really want that CSV file data to be in IRIS tables. Maybe if it's rarely accessed projecting it as a foreign table is more cost effective?

Nice article! 

as a complement to the section on Tune Table, I'd like to refer to this article I wrote about a bit of automation we put in the product in 2021.2 (that we intend to enhance this year), and also this one on caveats wrt packaging statistics

something odd is going on with that new_embedding_str parameter value you're adding. Rather than taking the value, it's taking the parameter name, hence the "field not found" error. Try removing that * before parameters in your call to exec(), or just inline the parameter value into the statement as you're not reusing it anyway.