bug: mutate(a=".") fails

[syakesaba]

What happened?

ibis.get_backend().name
# 'duckdb'
ibis.memtable([{"a":1},]).mutate(b=".")

Raises ibis.common.exceptions.IbisTypeError: Column '.' is not found in table. Existing columns: 'a'.

What version of ibis are you using?

ibis-framework==9.5.0
duckdb==1.1.0

What backend(s) are you using, if any?

DuckDB

Relevant log output

No response

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[syakesaba]

ibis.literal() solved this.

[cpcloud]

Yep, ibis.literal(".") is the solution here!