a header histogram could not be computed: co...

Warnings reference › facets.unavailable

Identifier

facets.unavailable

Raised by

The grid (core)

Since

1.112.0

What happened

The query or computation behind a column's header histogram failed. The band says the histogram is unavailable instead of staying empty, and facet:failed fires. It is logged once per page, not once per column.

The fix

Read the error in the message: a DuckDB connection that was closed or a provider that threw. A filter change retries the count.

Reference

Covered in full at the API reference.