fix(oceanbase): preserve partition DDL and toggle storage options

agents/common/src/main/java/com/dbx/agent/DatabaseAgent.java

@@ -147,6 +147,14 @@ public interface DatabaseAgent {
 
     List<TriggerInfo> listTriggers(String schema, String table);
 
+    default List<PartitionInfo> listPartitions(String schema, String table) {
+        return Collections.emptyList();
+    }
+
+    default List<PartitionInfo> listSubpartitions(String schema, String table) {
+        return Collections.emptyList();
+    }
+
     default QueryResult executeQuery(String sql, String schema) {
         return executeQuery(sql, schema, new ExecuteQueryOptions());
     }

agents/common/src/main/java/com/dbx/agent/JsonRpcServer.java

@@ -246,6 +246,14 @@ public final class JsonRpcServer {
             switchCatalog(params);
             return agent.listTriggers(params.get("schema").getAsString(), params.get("table").getAsString());
         }
+        if (AgentProtocol.METHOD_LIST_PARTITIONS.equals(method)) {
+            switchCatalog(params);
+            return agent.listPartitions(params.get("schema").getAsString(), params.get("table").getAsString());
+        }
+        if (AgentProtocol.METHOD_LIST_SUBPARTITIONS.equals(method)) {
+            switchCatalog(params);
+            return agent.listSubpartitions(params.get("schema").getAsString(), params.get("table").getAsString());
+        }
         if (AgentProtocol.METHOD_EXECUTE_QUERY.equals(method)) {
             return agent.executeQuery(
                 params.get("sql").getAsString(),

agents/common/src/main/java/com/dbx/agent/PartitionInfo.java

@@ -0,0 +1,5 @@
+package com.dbx.agent;
+
+/** Shared wire shape for partition and subpartition metadata. */
+public record PartitionInfo(String name, int position, String value, String partition_type, String partition_key) {
+}