[GitHub] [shardingsphere] TeslaCN commented on a diff in pull request #24358: PostgreSQL protocol support UUID binary data format

["TeslaCN (via GitHub)" <gi...@apache.org>]

TeslaCN commented on code in PR #24358:
URL: https://github.com/apache/shardingsphere/pull/24358#discussion_r1159574720


##########
db-protocol/postgresql/src/main/java/org/apache/shardingsphere/db/protocol/postgresql/packet/command/query/extended/bind/protocol/PostgreSQLUUIDBinaryProtocolValue.java:
##########
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.db.protocol.postgresql.packet.command.query.extended.bind.protocol;
+
+import java.util.UUID;
+import org.apache.shardingsphere.db.protocol.postgresql.payload.PostgreSQLPacketPayload;
+
+/**
+ * Binary protocol value for UUID for PostgreSQL.
+ */
+public final class PostgreSQLUUIDBinaryProtocolValue implements PostgreSQLBinaryProtocolValue {
+    
+    @Override
+    public int getColumnLength(final Object value) {
+        return value.toString().length();
+    }
+    
+    @Override
+    public Object read(final PostgreSQLPacketPayload payload, final int parameterValueLength) {
+        byte[] uuidFromBytes = new byte[parameterValueLength];
+        UUID result = UUID.nameUUIDFromBytes(uuidFromBytes);

Review Comment:
   `UUID.nameUUIDFromBytes` is not for deserializing.
   
   This is how PostgreSQL JDBC deserialize an UUID instance.
   https://github.com/pgjdbc/pgjdbc/blob/99d010147b3e6907a39485ec0113c56d09fdfc37/pgjdbc/src/main/java/org/postgresql/jdbc/PgResultSet.java#L3589
   
   



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