[CH] Unsupported function overlay and without fallback

[lwz9103]

Backend

CH (ClickHouse)

Bug description

SQL:

select overlay(LSTG_FORMAT_NAME PLACING 'abc' FROM 1),
       overlay(LSTG_FORMAT_NAME PLACING 'abc' FROM 1 FOR 1)
 from test_kylin_fact

Error:

SigOverlay is defined in ExpressionMappings, but there is no function mapping defined in CH backend

Spark version

None

Spark configurations

No response

System information

No response

Relevant logs

No response