fixed issue #3377 , escapse schema name

parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/tsdb/DatabaseTableMeta.java

@@ -21,9 +21,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.MDC;
 
+import com.alibaba.druid.sql.repository.Schema;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
-import com.alibaba.druid.sql.repository.Schema;
 import com.alibaba.otter.canal.filter.CanalEventFilter;
 import com.alibaba.otter.canal.parse.driver.mysql.packets.server.ResultSetPacket;
 import com.alibaba.otter.canal.parse.exception.CanalParseException;
@@ -463,10 +463,17 @@ public class DatabaseTableMeta implements TableMetaTSDB {
         }
     }
 
+    private String structureSchema(String schema) {
+        if (schema.startsWith("`") && schema.endsWith("`")) {
+            return schema;
+        }
+        return "`" + schema + "`";
+    }
+
     private String getFullName(String schema, String table) {
         StringBuilder builder = new StringBuilder();
         return builder.append('`')
-            .append(schema)
+            .append(structureSchema(schema))
             .append('`')
             .append('.')
             .append('`')