Merge branch 'v1.8.0_name_redundancy' into 'v1.8.0_dev'

对建表语句中重复字段名进行检查



See merge request !128

Author: simenliuxing

core/src/main/java/com/dtstack/flink/sql/table/TableInfo.java

@@ -118,6 +118,10 @@ public void setParallelism(Integer parallelism) {
     }
 
     public void addField(String fieldName){
+        if (fieldList.contains(fieldName)) {
+            throw new RuntimeException("redundancy field name " + fieldName + " in table " + getName());
+        }
+
         fieldList.add(fieldName);
     }