Introduce :skip flag

[niquola]

What do you think about introducing {"skip": true} for select, unnest, where - it may be useful for the development process to quickly turn on and off expressions?

from: Patient
select:
  - {expr: id, name: id}
  - {expr: '$this', name: debug, skip: true}

[jmandel]

What is the behavior of skip? It just allows a column to be ignored? As though it wasn't present at all in the source? Or does it need to have a valid expression, or an expression that successfully extracts a field that simply gets omitted from the table?

[niquola]

Yes, it allows to ignore column or predicate

[niquola]

The general flow is that you can look into original data while writing column expressions and quickly can turn on/off this debug column

[niquola]

skip-video.mp4