support es stopwords analyzer inside indexClient

provide ddl with stopanalyzer

Signed-off-by: MrPresent-Han <jamesharden11122@gmail.com>

es_index.py

@@ -34,6 +34,11 @@ class ESIndex(PyOperator):
         except Exception as e:
             logger.error('Failed to connect ElasticSearch client:\n', e)
             raise e
+        # if index not exist, create with stop words analyzer to strengthen the search accuracy
+        if not self.is_index_exist(index_name):
+            logger.info(f'index{index_name} not exists, will create the index with stopwords analyzer')
+            self.create_index_with_stopwords(index_name)
+
 
     def __call__(self, doc: Union[dict, List[dict]]):
         if isinstance(doc, dict):
@@ -54,3 +59,50 @@ class ESIndex(PyOperator):
         ]
         res = elasticsearch.helpers.bulk(self.client, actions, refresh=True)
         return res
+
+    def is_index_exist(self, index_name: str):
+        return self.client.indices.exists(index=index_name)
+
+    def create_index_with_stopwords(self, index_name: str):
+        mappings = {
+            "properties": {
+                "milvus_id": {
+                    "type": "long"
+                },
+                "paragraph": {
+                    "type": "text",
+                    "analyzer": "my_stop_analyzer",
+                    "fields": {
+                        "keyword": {
+                            "type": "keyword",
+                            "ignore_above": 256
+                        }
+                    }
+                },
+                "path": {
+                    "type": "text",
+                    "analyzer": "my_stop_analyzer",
+                    "fields": {
+                        "keyword": {
+                            "type": "keyword",
+                            "ignore_above": 256
+                        }
+                    }
+                }
+            }
+        }
+        settings = {
+            "analysis": {
+                "analyzer": {
+                    "my_stop_analyzer": {
+                        "type": "stop",
+                        "stopwords_path": "stopwords/stopwords-en.txt"
+                    }
+                }
+            },
+            "number_of_shards": 3,
+            "number_of_replicas": 0
+        }
+        self.client.indices.create(index=index_name, mappings=mappings, settings=settings)
+        logger.info(f"created index{index_name}")
+