Update By Query and Reindex

part-2/7.4-UpdateByQuery&Reindex API/README.md

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+# Update by Query & Reindex
+## 课程demo
+```
+DELETE blogs/
+
+# 写入文档
+PUT blogs/_doc/1
+{
+  "content":"Hadoop is cool",
+  "keyword":"hadoop"
+}
+
+# 查看 Mapping
+GET blogs/_mapping
+
+# 修改 Mapping，增加子字段，使用英文分词器
+PUT blogs/_mapping
+{
+      "properties" : {
+        "content" : {
+          "type" : "text",
+          "fields" : {
+            "english" : {
+              "type" : "text",
+              "analyzer":"english"
+            }
+          }
+        }
+      }
+    }
+
+
+# 写入文档
+PUT blogs/_doc/2
+{
+  "content":"Elasticsearch rocks",
+    "keyword":"elasticsearch"
+}
+
+# 查询新写入文档
+POST blogs/_search
+{
+  "query": {
+    "match": {
+      "content.english": "Elasticsearch"
+    }
+  }
+
+}
+
+# 查询 Mapping 变更前写入的文档
+POST blogs/_search
+{
+  "query": {
+    "match": {
+      "content.english": "Hadoop"
+    }
+  }
+}
+
+
+# Update所有文档
+POST blogs/_update_by_query
+{
+
+}
+
+# 查询之前写入的文档
+POST blogs/_search
+{
+  "query": {
+    "match": {
+      "content.english": "Hadoop"
+    }
+  }
+}
+
+
+# 查询
+GET blogs/_mapping
+
+PUT blogs/_mapping
+{
+        "properties" : {
+        "content" : {
+          "type" : "text",
+          "fields" : {
+            "english" : {
+              "type" : "text",
+              "analyzer" : "english"
+            }
+          }
+        },
+        "keyword" : {
+          "type" : "keyword"
+        }
+      }
+}
+
+
+
+DELETE blogs_fix
+
+# 创建新的索引并且设定新的Mapping
+PUT blogs_fix/
+{
+  "mappings": {
+        "properties" : {
+        "content" : {
+          "type" : "text",
+          "fields" : {
+            "english" : {
+              "type" : "text",
+              "analyzer" : "english"
+            }
+          }
+        },
+        "keyword" : {
+          "type" : "keyword"
+        }
+      }    
+  }
+}
+
+# Reindx API
+POST  _reindex
+{
+  "source": {
+    "index": "blogs"
+  },
+  "dest": {
+    "index": "blogs_fix"
+  }
+}
+
+GET  blogs_fix/_doc/1
+
+# 测试 Term Aggregation
+POST blogs_fix/_search
+{
+  "size": 0,
+  "aggs": {
+    "blog_keyword": {
+      "terms": {
+        "field": "keyword",
+        "size": 10
+      }
+    }
+  }
+}
+
+
+# Reindx API，version Type Internal
+POST  _reindex
+{
+  "source": {
+    "index": "blogs"
+  },
+  "dest": {
+    "index": "blogs_fix",
+    "version_type": "internal"
+  }
+}
+
+# 文档版本号增加
+GET  blogs_fix/_doc/1
+
+# Reindx API，version Type Internal
+POST  _reindex
+{
+  "source": {
+    "index": "blogs"
+  },
+  "dest": {
+    "index": "blogs_fix",
+    "version_type": "external"
+  }
+}
+
+
+# Reindx API，version Type Internal
+POST  _reindex
+{
+  "source": {
+    "index": "blogs"
+  },
+  "dest": {
+    "index": "blogs_fix",
+    "version_type": "external"
+  },
+  "conflicts": "proceed"
+}
+
+# Reindx API，version Type Internal
+POST  _reindex
+{
+  "source": {
+    "index": "blogs"
+  },
+  "dest": {
+    "index": "blogs_fix",
+    "op_type": "create"
+  }
+}
+
+
+GET _tasks?detailed=true&actions=*reindex
+
+
+```