[mysql] quota the field names when executing mysql query (#2381) (#2388)

Co-authored-by: DESKTOP-TQDONF3\狗狗jian <zhangjian@adream.org>

flink-connector-mysql-cdc/src/main/java/com/ververica/cdc/connectors/mysql/source/utils/StatementUtils.java

@@ -244,7 +244,7 @@ public class StatementUtils {
             RowType pkRowType, StringBuilder sql, String predicate) {
         for (Iterator<String> fieldNamesIt = pkRowType.getFieldNames().iterator();
                 fieldNamesIt.hasNext(); ) {
-            sql.append(fieldNamesIt.next()).append(predicate);
+            sql.append(quote(fieldNamesIt.next())).append(predicate);
             if (fieldNamesIt.hasNext()) {
                 sql.append(" AND ");
             }
@@ -255,7 +255,7 @@ public class StatementUtils {
         StringBuilder sql = new StringBuilder();
         for (Iterator<String> fieldNamesIt = pkRowType.getFieldNames().iterator();
                 fieldNamesIt.hasNext(); ) {
-            sql.append(fieldNamesIt.next());
+            sql.append(quote(fieldNamesIt.next()));
             if (fieldNamesIt.hasNext()) {
                 sql.append(" , ");
             }
@@ -267,7 +267,7 @@ public class StatementUtils {
         StringBuilder sql = new StringBuilder();
         for (Iterator<String> fieldNamesIt = pkRowType.getFieldNames().iterator();
                 fieldNamesIt.hasNext(); ) {
-            sql.append("MAX(" + fieldNamesIt.next() + ")");
+            sql.append("MAX(" + quote(fieldNamesIt.next()) + ")");
             if (fieldNamesIt.hasNext()) {
                 sql.append(" , ");
             }