Consistency of boxplot width

[teunbrand]

Compare:

VISUALISE species AS x, bill_len AS y FROM ggsql:penguins
  DRAW boxplot
  DRAW point

with jittered points;

VISUALISE species AS x, bill_len AS y FROM ggsql:penguins
  DRAW boxplot
  DRAW point SETTING position => 'jitter'

And you'll find that the boxplots have become more narrow than you'd expect in the 2nd case.

[teunbrand]

Same problem for the bar layer; the following example stacks y so it is hard to see, but the bars are also too narrow.

VISUALISE species AS x, bill_len AS y FROM ggsql:penguins
  DRAW bar
  DRAW point SETTING position => 'jitter'