Ming LI created HAWQ-1068:

             Summary: master process panic with signal 11 when call 
                 Key: HAWQ-1068
                 URL: https://issues.apache.org/jira/browse/HAWQ-1068
             Project: Apache HAWQ
          Issue Type: Bug
          Components: Catalog
            Reporter: Ming LI
            Assignee: Lei Chang
             Fix For: backlog

Customer has a function which will call get_ao_compression_ratio() to pass the 
relation name dynamically. However in some corner case 
get_ao_compression_ratio() will be passed with NULL, which triggered a signal 
11 and crashed the master process. 
The issue could be easily reproduced in house as shown below:
gpadmin=# select get_ao_compression_ratio(null);
server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!> \q

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