Mediawiki 1.39.4, PHP 8.1.25, MariaDB 11.1.

When #get_db_data is constructed like this (using SQL JOIN):

{{#get_db_data: db=test |from=t1 |where=t1.c1='test' |join on=t1.c1=t2.id |data=t1c1=t1.c1 }}

the resulting query is

SELECT t1.c1 FROM t1 WHERE t1.c1='test'

i.e. missing 'JOIN t2 ON t1.c1=t2.id'.

Tested with ExternalData 3.1, 3.2 and Git master.

Thanks for any attention to this.

Šarūnas