Rasql_avg_cells() doesn't work on multiband collection

[Bang Pham Huu]

test_rgb is a 3 bands 2D collection imported via rasql. However, it cannot calculate the average for 1 specific band or multiband.

For 1 band, it throws exception.
rasql -q 'select avg_cells(c.0) from test_rgb as c' --out string
rasql: rasdaman query tool v1.0, rasdaman v9.5.0-beta1-g83e5ca18.
opening database RASBASE at localhost:7001...ok
Executing retrieval query...rasdaman error 368: Execution error 368 in line 1, column 19, near token .: Cell base type for induced dot operation must be complex.
aborting transaction...ok


For all bands, server killed
rasql -q 'select avg_cells(c) from test_rgb as c' --out string
rasql: rasdaman query tool v1.0, rasdaman v9.5.0-beta1-g83e5ca18.
opening database RASBASE at localhost:7001...ok
Executing retrieval query...[ERROR] - Client failed with error:Endpoint read failed
rasdaman error 0: The client failed to contact the server.
aborting transaction...[ERROR] - The client failed to connect to rasserver.