[Fix](Prepared Statment) use fixed charset to init StringLiteral

fe/fe-core/src/main/java/org/apache/doris/analysis/StringLiteral.java

@@ -40,6 +40,7 @@
 import java.io.UnsupportedEncodingException;
 import java.math.BigDecimal;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Objects;
 
 public class StringLiteral extends LiteralExpr {
@@ -344,7 +345,9 @@ public void setupParamFromBinary(ByteBuffer data, boolean isUnsigned) {
         }
         byte[] bytes = new byte[strLen];
         data.get(bytes);
-        value = new String(bytes);
+        // ATTN: use fixed StandardCharsets.UTF_8 to avoid unexpected charset in
+        // different environment
+        value = new String(bytes, StandardCharsets.UTF_8);
         if (LOG.isDebugEnabled()) {
             LOG.debug("parsed value '{}'", value);
         }

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/Literal.java

@@ -45,6 +45,7 @@
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.Locale;
 import java.util.Objects;
 import java.util.Optional;
@@ -582,14 +583,18 @@ private static Literal handleStringLiteral(ByteBuffer data) {
         strLen = Math.min(strLen, data.remaining());
         byte[] bytes = new byte[strLen];
         data.get(bytes);
-        return new StringLiteral(new String(bytes));
+        // ATTN: use fixed StandardCharsets.UTF_8 to avoid unexpected charset in
+        // different environment
+        return new StringLiteral(new String(bytes, StandardCharsets.UTF_8));
     }
 
     private static Literal handleVarcharLiteral(ByteBuffer data) {
         int strLen = getParmLen(data);
         strLen = Math.min(strLen, data.remaining());
         byte[] bytes = new byte[strLen];
         data.get(bytes);
-        return new VarcharLiteral(new String(bytes));
+        // ATTN: use fixed StandardCharsets.UTF_8 to avoid unexpected charset in
+        // different environment
+        return new VarcharLiteral(new String(bytes, StandardCharsets.UTF_8));
     }
 }

fe/fe-core/src/main/java/org/apache/doris/qe/MysqlConnectProcessor.java

@@ -213,7 +213,9 @@ private void handleExecute(PrepareCommand prepareCommand, long stmtId, PreparedS
     // process COM_EXECUTE, parse binary row data
     // https://dev.mysql.com/doc/dev/mysql-server/latest/page_protocol_com_stmt_execute.html
     private void handleExecute() {
-        // debugPacket();
+        if (LOG.isDebugEnabled()) {
+            debugPacket();
+        }
         packetBuf = packetBuf.order(ByteOrder.LITTLE_ENDIAN);
         // parse stmt_id, flags, params
         int stmtId = packetBuf.getInt();