sandynz opened a new issue, #37579:
URL: https://github.com/apache/shardingsphere/issues/37579

   ## Bug Report
   
   ### Which version of ShardingSphere did you use?
   
   master branch
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   
   JDBC
   
   ### Expected behavior
   
   Get correct schema name from parsed CREATE INDEX SQL.
   
   ### Actual behavior
   
   Run PostgreSQLMigrationGeneralE2EIT on openGauss, it failed.
   I added a new unit test `OpenGaussSQLParserEngineTest`, it could not get 
correct schema name too.
   
   ### Reason analyze (If you can)
   
   `TablesContext` doesn't extract owner as schema name:
   <img width="2816" height="1310" alt="Image" 
src="https://github.com/user-attachments/assets/6e306163-26c2-43a8-ad7a-b68ede799fb2";
 />
   
   --
   Some test on openGauss:
   ```
   openGauss=# select * from ds_0.schema1.t_user;
   ERROR:  cross-database references are not implemented: "ds_0.schema1.t_user"
   LINE 1: select * from ds_0.schema1.t_user;
                         ^
   openGauss=# \c ds_0
   Non-SSL connection (SSL connection is recommended when requiring 
high-security)
   You are now connected to database "ds_0" as user "omm".
   
   ds_0=# select * from schema1.t_user;
    id | username  | password | schema1_flag | email  
   ----+-----------+----------+--------------+--------
   ```
   
   `cross-database references are not implemented`, so could we just use owner 
as schema name for openGauss?
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule 
configuration, when exception occur etc.
   
   Run unit test on `OpenGaussSQLParserEngineTest` (need to change assert code 
near TODO comment).
   
   ### Example codes for reproduce this issue (such as a github link).
   
   See `OpenGaussSQLParserEngineTest`.
   


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