remove-warn

Author: Caideyipi

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/InternalClientSession.java

@@ -21,6 +21,7 @@
 
 import org.apache.iotdb.service.rpc.thrift.TSConnectionType;
 
+import java.util.Collections;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -109,7 +110,6 @@ public PreparedStatementInfo getPreparedStatement(String statementName) {
 
   @Override
   public Set<String> getPreparedStatementNames() {
-    throw new UnsupportedOperationException(
-        "InternalClientSession should never call PREPARE statement methods.");
+    return Collections.emptySet();
   }
 }

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/MqttClientSession.java

@@ -97,7 +97,6 @@ public PreparedStatementInfo getPreparedStatement(String statementName) {
 
   @Override
   public Set<String> getPreparedStatementNames() {
-    throw new UnsupportedOperationException(
-        "MQTT client session does not support PREPARE statement.");
+    return Collections.emptySet();
   }
 }