Default histogram query with generic data returning Error(missing)

[philrz]

Repro is with Zui commit de25266.

The attached video shows the import of the sample.zng data from this repo. As it shows, the default histogram is rendered with Error(missing) for all of the values. A sniff in Wireshark shows the the query being sent to the lake API from here:

zui/src/panes/histogram-pane/run-query.ts

Line 84 in de25266

const query = `${baseQuery} | ${timeField} != null | count() by time := bucket(${timeField}, ${interval}), group := ${colorField} | sort time`

Looks like this (note the undefined):

{"query":"from 'sample.zng' | ts != null | count() by time := bucket(ts, 100ms), group := undefined | sort time"}

Repro.mp4

[philrz]

Verified in Zui commit 729f9ee.

As shown in the attached video, now when I import the same sample.zng data and click Query Pool, the stacked bars are segmented by the the expected default Color Field typeof(this) rather than Error(missing).

Verify.mp4

Thanks @jameskerr!