[GitHub] [shardingsphere] strongduanmu opened a new issue #12648: Consider supporting case sensitivity of table and column names in ShardingSphere metadata

[GitBox <gi...@apache.org>]

strongduanmu opened a new issue #12648:
URL: https://github.com/apache/shardingsphere/issues/12648


   ## Feature Request
   
   By default, ShardingSphere metadata is not case sensitive when processing table names and column names. This may cause some problems on case-sensitive databases.
   
   ```java
   /**
    * ShardingSphere schema.
    */
   @Getter
   public final class ShardingSphereSchema {
       
       private final Map<String, TableMetaData> tables;
       
       @SuppressWarnings("CollectionWithoutInitialCapacity")
       public ShardingSphereSchema() {
           tables = new ConcurrentHashMap<>();
       }
       
       public ShardingSphereSchema(final Map<String, TableMetaData> tables) {
           this.tables = new ConcurrentHashMap<>(tables.size(), 1);
           tables.forEach((key, value) -> this.tables.put(key.toLowerCase(), value));
       }
       ...
   }
   
   /**
    * Federation schema meta data.
    */
   @Getter
   public final class FederationSchemaMetaData {
       
       private final String name;
       
       private final Map<String, FederationTableMetaData> tables = new LinkedHashMap<>();
       
       public FederationSchemaMetaData(final String name, final Map<String, TableMetaData> metaData) {
           this.name = name;
           for (Entry<String, TableMetaData> entry : metaData.entrySet()) {
               tables.put(entry.getKey(), new FederationTableMetaData(entry.getValue().getName(), entry.getValue()));
           }
       }
       
       /**
        * Renew.
        * 
        * @param metaData meta data
        */
       @Synchronized
       public void renew(final TableMetaData metaData) {
           tables.put(metaData.getName().toLowerCase(), new FederationTableMetaData(metaData.getName(), metaData));
       }
       ...
   }
   ```
   
   Therefore, it is hoped that ShardingSphere can dynamically handle case sensitivity according to the database configuration. 
   
   ### Is your feature request related to a problem?
   
   No related problem.
   
   ### Describe the feature you would like.
   
   supporting case sensitivity of table and column names in ShardingSphere metadata
   


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