Template variable dependant of another template variable with "Include All option" on, causes Cannot read property 'replace' of null

Grafana v6.6.2 (3fa63cfc34) ClickHouse datasource for Grafana 4.6+ 1.9.5

I have several dependant templating variables:

This one works always.

This one for now has “Include All option” disabled, and it works always.

This one works only if $CITY has “Include All option” disabled.

If variables are set as described above everything works. Select for CMTS looks like this: select distinct cmts from pre_eq.pre_eq where bulkId in (‘2020-07-10 00:00:00’) and crmCity in (‘BJELOVAR’) FORMAT JSON

If I change $CITY variable in a way to enable “Include All option”, I am getting an error: “Template variable service failed Cannot read property ‘replace’ of null”

Looks like there is a problem with interpretation of the $CITY variable when “Include All option” is selected.

Database fields are of types: ,bulkId DATETIME ,cmts String ,crmCity Nullable(String)

Is there any workaround?

[Slach]

@sundy-li quick workaround for you SELECT ... WHERE os IN ( arrayMap((x)->toString(x),${client_version}) )

[Slach]

@ghuname ok, could you close this issue and create a new issue? what you mean “template variable engine is confused”? do you mean something wrong with grafana UI or clickhouse-grafana replace template variable with wrong values?