oneslideicywater edited a comment on issue #13978:
URL: 
https://github.com/apache/shardingsphere/issues/13978#issuecomment-988620559


   @TeslaCN It's very nice that I successfully build an image 
`apache/shardingsphere-proxy:5.0.1-SNAPSHOT`, the previous problem solved!. 
   
   
   
   but there's another question occurs:
   
   dump the logical database `sharding_db` (with postgis extension enabled 
using `CREATE EXTENSION postgis;`) 
    failed when using pg_dump  
   :
   
   ```bash
   root@a15d5aac4a11:/var/lib/postgresql/data# pg_dump -U postgres -d 
sharding_db -h 192.168.10.53 -p 13308 > test.sql
   Password: 
   pg_dump: [archiver (db)] query failed: ERROR:  You have an error in your SQL 
syntax
   pg_dump: [archiver (db)] query was: LOCK TABLE public.spatial_ref_sys IN 
ACCESS SHARE MODE
   ```
   
   but dump the physical database( not proxyed by sharding-proxy) is ok :
   
   ```bash
   pg_dump -U postgres -d geo -h 192.168.10.53 -p 5432 > test.sql
   ```
   
   


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