RaigorJiang opened a new issue, #32487: URL: https://github.com/apache/shardingsphere/issues/32487
## Bug Report ### Which version of ShardingSphere did you use? master 65ca96a7c66e49d242edf5249800a497fef1cd86 ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? ShardingSphere-Proxy ### Expected behavior After creating the shadow rule, users can load single table normally. ### Actual behavior <img width="968" alt="image" src="https://github.com/user-attachments/assets/0c4f20cb-f89a-4c81-993f-7f745e9ecd47";> ### Reason analyze (If you can) After creating the shadow rule, the previously independent storage unit no longer exists, and the single table cannot find the corresponding data source ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc. ```sql mysql> create database shadow_db; Query OK, 0 rows affected (0.07 sec) mysql> USE shadow_db; Database changed mysql> REGISTER STORAGE UNIT product_ds ( -> URL="jdbc:mysql://127.0.0.1:3306/demo_ds_0?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true", -> USER="root", -> PASSWORD="123456", -> PROPERTIES("maximumPoolSize"=10) -> ), shadow_ds ( -> URL="jdbc:mysql://127.0.0.1:3306/demo_ds_1?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true", -> USER="root", -> PASSWORD="123456", -> PROPERTIES("maximumPoolSize"=10) -> ); Query OK, 0 rows affected (0.67 sec) mysql> show unloaded single tables; +------------+-------------------+ | table_name | storage_unit_name | +------------+-------------------+ | t_user_0 | product_ds | | t_user | product_ds | | t_user_3 | shadow_ds | | t_user_2 | product_ds | | t_user_1 | shadow_ds | +------------+-------------------+ 5 rows in set (0.29 sec) mysql> load single table *.*; Query OK, 0 rows affected (0.12 sec) mysql> show tables; +---------------------+ | Tables_in_shadow_db | +---------------------+ | t_user | | t_user_0 | | t_user_1 | | t_user_2 | | t_user_3 | +---------------------+ 5 rows in set (0.06 sec) mysql> show single tables; +------------+-------------------+ | table_name | storage_unit_name | +------------+-------------------+ | t_user | product_ds | | t_user_0 | product_ds | | t_user_1 | shadow_ds | | t_user_2 | product_ds | | t_user_3 | shadow_ds | +------------+-------------------+ 5 rows in set (0.01 sec) mysql> CREATE SHADOW RULE shadow_group ( -> SOURCE=product_ds, -> SHADOW=shadow_ds, -> t_single ( -> TYPE(NAME=VALUE_MATCH, PROPERTIES("operation"="insert","column"="status","value"=1)) -> ) -> ); Query OK, 0 rows affected (0.11 sec) mysql> show storage units; +------------+-------+-----------+------+-----------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | name | type | host | port | db | connection_timeout_milliseconds | idle_timeout_milliseconds | max_lifetime_milliseconds | max_pool_size | min_pool_size | read_only | other_attributes | +------------+-------+-----------+------+-----------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | product_ds | MySQL | 127.0.0.1 | 3306 | demo_ds_0 | 30000 | 60000 | 2100000 | 10 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"keepaliveTime":0,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false,"queryProperties":{"allowPublicKeyRetrieval":"true","serverTimezone":"UTC","useSSL":"false"}} | | shadow_ds | MySQL | 127.0.0.1 | 3306 | demo_ds_1 | 30000 | 60000 | 2100000 | 10 | 1 | false | {"healthCheckProperties":{},"initializationFailTimeout":1,"validationTimeout":5000,"keepaliveTime":0,"leakDetectionThreshold":0,"registerMbeans":false,"allowPoolSuspension":false,"autoCommit":true,"isolateInternalQueries":false,"queryProperties":{"allowPublicKeyRetrieval":"true","serverTimezone":"UTC","useSSL":"false"}} | +------------+-------+-----------+------+-----------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 2 rows in set (0.32 sec) mysql> show tables; Empty set (0.00 sec) mysql> show single tables; Empty set (0.01 sec) mysql> show unloaded single tables; +------------+-------------------+ | table_name | storage_unit_name | +------------+-------------------+ | t_user_0 | shadow_group | | t_user | shadow_group | | t_user_2 | shadow_group | +------------+-------------------+ 3 rows in set (0.02 sec) mysql> load single table *.*; ERROR 10500 (44000): Invalid single rule configuration, reason is: Data source `product_ds` does not exist in database `shadow_db`. ``` -- This is an automated message from the Apache Git Service. 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