[feat-269][elasticsearch5&6][sink]ignore check when ids is null.

Author: HiLany

elasticsearch5/elasticsearch5-sink/src/main/java/com/dtstack/flink/sql/sink/elasticsearch/ElasticsearchSink.java

@@ -119,7 +119,9 @@ public TypeInformation<?>[] getFieldTypes() {
     private RichSinkFunction createEsSinkFunction(){
 
         // check whether id fields is exists in columns if not use position to generate doc's id
-        if (!usePosition) {
+        if (!usePosition
+                && ids != null
+                && ids.size() != 0) {
             List<String> filedNamesLists = Arrays.asList(fieldNames);
             Preconditions.checkState(filedNamesLists.containsAll(ids), "elasticsearch6 type of id %s is should be exists in columns %s.", ids, filedNamesLists);
         }

elasticsearch6/elasticsearch6-sink/src/main/java/com/dtstack/flink/sql/sink/elasticsearch/ElasticsearchSink.java

@@ -111,7 +111,9 @@ public TypeInformation<?>[] getFieldTypes() {
     private RichSinkFunction createEsSinkFunction() {
 
         // check whether id fields is exists in columns if not use position to generate doc's id
-        if (!usePosition) {
+        if (!usePosition
+                && ids != null
+                && ids.size() != 0) {
             List<String> filedNamesLists = Arrays.asList(fieldNames);
             Preconditions.checkState(filedNamesLists.containsAll(ids), "elasticsearch6 type of id %s is should be exists in columns %s.", ids, filedNamesLists);
         }