{"id":4208,"date":"2018-12-12T20:37:28","date_gmt":"2018-12-12T12:37:28","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4208"},"modified":"2018-12-12T20:37:28","modified_gmt":"2018-12-12T12:37:28","slug":"hive%e4%b8%ad%e5%a6%82%e4%bd%95%e5%8a%a0%e8%bd%bd%e5%92%8c%e8%a7%a3%e6%9e%90%e5%b5%8c%e5%a5%97json%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4208.html","title":{"rendered":"Hive\u4e2d\u5982\u4f55\u52a0\u8f7d\u548c\u89e3\u6790(\u5d4c\u5957)json\u6570\u636e"},"content":{"rendered":"<p>=Start=<\/p>\n<h4 id=\"id-\u6a21\u677f-\u7f18\u7531\uff1a\">\u7f18\u7531\uff1a<\/h4>\n<p>\u6700\u8fd1\u7ecf\u5e38\u4f7f\u7528Hive\u8fdb\u884c\u6570\u636e\u5206\u6790\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u6bd4\u8f83\u5178\u578b\u7684\u573a\u666f\u5c31\u662f\u2014\u2014\u90e8\u5206\u6709\u6548\u7684\u6570\u636e\u5728\u4e00\u4e2a\u5927\u7684\u591a\u5c42\u5d4c\u5957\u7ed3\u6784json\u5b57\u7b26\u4e32\u4e2d\uff0c\u8be5\u5982\u4f55\u8fdb\u884c\u5339\u914d\u548c\u6bd4\u5bf9\uff0c\u53ef\u884c\u7684\u65b9\u6cd5\u5e94\u8be5\u6709\u4e0d\u5c11\uff0c\u6211\u8fd9\u91cc\u5148\u8bb0\u5f55\u4e00\u4e0b\u6211\u77e5\u9053\u548c\u5b9e\u9645\u7528\u5230\u7684\uff0c\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n<h4 id=\"id-\u6a21\u677f-\u6b63\u6587\uff1a\">\u6b63\u6587\uff1a<\/h4>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u89e3\u7b54\uff1a\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n<pre class=\"lang:default decode:true \" title=\"\u6d4b\u8bd5\u7528\u7684json\u6570\u636e\uff08pretty print\uff09\">\/*\r\n-- \u6d4b\u8bd5json\u6570\u636e\r\n{\r\n  \"store\": {\r\n    \"fruit\": [\r\n      {\r\n        \"weight\": 8,\r\n        \"type\": \"apple\"\r\n      },\r\n      {\r\n        \"weight\": 9,\r\n        \"type\": \"pear\"\r\n      }\r\n    ],\r\n    \"bicycle\": {\r\n      \"price\": 19.951,\r\n      \"color\": \"red1\"\r\n    }\r\n  },\r\n  \"email\": \"amy@only_for_json_udf_test.net\",\r\n  \"owner\": \"amy1\"\r\n}\r\n\r\n-- \u6d4b\u8bd5json\u6570\u636e\r\n[\r\n  {\r\n    \"bssid\": \"12:34:56:78:c4:90\",\r\n    \"ssid\": \"wifi-guest\"\r\n  },\r\n  {\r\n    \"bssid\": \"12:34:56:78:c4:a9\",\r\n    \"ssid\": \"wifi-guest\"\r\n  },\r\n  {\r\n    \"bssid\": \"12:34:56:78:c4:a8\",\r\n    \"ssid\": \"wifi-inc\"\r\n  }\r\n]\r\n\r\n-- \u6d4b\u8bd5json\u6570\u636e\r\n{\r\n  \"optional\": \"unknown\",\r\n  \"wifiList\": \"[{\\\"bssid\\\":\\\"12:34:56:78:c4:85\\\",\\\"ssid\\\":\\\"Xiaomi_XS\\\"},{\\\"bssid\\\":\\\"12:34:56:78:c4:86\\\",\\\"ssid\\\":\\\"Xiaomi_5G\\\"},{\\\"bssid\\\":\\\"7c:03:c9:e3:95:74\\\",\\\"ssid\\\":\\\"ChinaNet-HfVw\\\"}]\",\r\n  \"IMSI\": \"351036391715285\",\r\n  \"dpi\": \"588\",\r\n  \"timestamp\": \"1542365379014\",\r\n  \"coordinates\": \"36.733577|125.237956\",\r\n  \"startupTime\": \"1542391575\",\r\n  \"totalMemory\": \"5964230656\",\r\n  \"availableMemory\": \"1474846720\",\r\n  \"serial\": \"abcd\",\r\n  \"currentWifi\": \"[{\\\"bssid\\\":\\\"12:34:56:78:c4:85\\\",\\\"rssi\\\":-34,\\\"ssid\\\":\\\"Xiaomi_XS\\\"}]\",\r\n  \"systemVolume\": \"83\"\r\n}\r\n*\/\r\n<\/pre>\n<p>&amp;<\/p>\n<pre class=\"lang:default decode:true \" title=\"get_json_object()\u7684\u6b63\u786e\u7528\u6cd5\">select get_json_object('{\"store\":{\"fruit\":[{\"weight\":8,\"type\":\"apple\"},{\"weight\":9,\"type\":\"pear\"}],\"bicycle\":{\"price\":19.951,\"color\":\"red1\"}},\"email\":\"amy@only_for_json_udf_test.net\",\"owner\":\"amy1\"}', '$.owner');\r\n-- amy1\r\n\r\nselect get_json_object('{\"store\":{\"fruit\":[{\"weight\":8,\"type\":\"apple\"},{\"weight\":9,\"type\":\"pear\"}],\"bicycle\":{\"price\":19.951,\"color\":\"red1\"}},\"email\":\"amy@only_for_json_udf_test.net\",\"owner\":\"amy1\"}', '$.store.fruit[0].weight');\r\n-- 8\r\n\r\nselect get_json_object('[{\"bssid\":\"12:34:56:78:c4:90\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a9\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a8\",\"ssid\":\"wifi-inc\"}]', '$.[0].ssid');\r\n-- wifi-guest\r\n\r\nselect get_json_object('[{\"bssid\":\"12:34:56:78:c4:90\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a9\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a8\",\"ssid\":\"wifi-inc\"}]', '$.[*].ssid');\r\n-- [\"wifi-guest\",\"wifi-guest\",\"wifi-inc\"]\r\n<\/pre>\n<p>&amp;<\/p>\n<pre class=\"lang:default decode:true \" title=\"\u4e00\u4e9b\u9519\u8bef\u5c1d\u8bd5\">select get_json_object('{\"store\":{\"fruit\":[{\"weight\":8,\"type\":\"apple\"},{\"weight\":9,\"type\":\"pear\"}],\"bicycle\":{\"price\":19.951,\"color\":\"red1\"}},\"currentWifi\":\"[{\\\"bssid\\\":\\\"12:34:56:78:c4:85\\\",\\\"rssi\\\":-34,\\\"ssid\\\":\\\"Xiaomi_XS\\\"}]\",\"email\":\"amy@only_for_json_udf_test.net\",\"owner\":\"amy1\"}', '$.store.fruit[*].type');\r\n-- NULL\r\n\r\nselect get_json_object('{\"store\":{\"fruit\":[{\"weight\":8,\"type\":\"apple\"},{\"weight\":9,\"type\":\"pear\"}],\"bicycle\":{\"price\":19.951,\"color\":\"red1\"}},\"currentWifi\":[{\"bssid\":\"12:34:56:78:c4:90\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a9\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a8\",\"ssid\":\"wifi-inc\"}],\"email\":\"amy@only_for_json_udf_test.net\",\"owner\":\"amy1\"}', '$.store.fruit[*].type');\r\n-- [\"apple\",\"pear\"]\r\n-- \u6211\u77e5\u9053\u95ee\u9898\u7684\u539f\u56e0\u4e86\uff0c\u5b83\u662f\u652f\u6301\u5d4c\u5957json\u7684\uff0c\u4f46\u5fc5\u987b\u8981\u6c42value\u7684\u503c\u4e5f\u662fjson\u7c7b\u578b\uff0c\u800c\u4e0d\u80fd\u662f\u7b26\u5408json\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5426\u5219\u6574\u4f53\u4f1a\u62a5\u9519\uff08\u8fd4\u56deNULL\uff09\u3002\r\n-- \u539f\u56e0\u662f get_json_object \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ea\u652f\u6301json\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u7b26\u5408json\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5426\u5219\u4f1a\u5c06\u5176\u4f5c\u4e3a\u975e\u6cd5json\u6765\u5904\u7406\uff0c\u5728\u53d6\u4efb\u4f55\u5b57\u6bb5\u90fd\u4f1a\u8fd4\u56deNULL\u3002\u5904\u7406\u529e\u6cd5\u5c31\u662f\u5d4c\u5957\u4f7f\u7528 get_json_object \u8fdb\u884c\u63d0\u53d6\u3002\r\n\r\nselect get_json_object(data,'$.timestamp'),\r\n\t\tget_json_object(data,'$.currentWifi'), -- [{\"bssid\":\"12:34:56:78:1f:7f\",\"rssi\":50,\"ssid\":\"zero\"}]\r\n\t\tget_json_object(data,'$.currentWifi[0]'), -- null\r\n\t\tget_json_object(data,'$.currentWifi.[0]'), -- null\r\n\t\tget_json_object(get_json_object(data,'$.currentWifi'), '$.[0].ssid'), -- zero\r\n\t\tdata\r\nfrom db_name.table_name\r\nwhere\r\n\tdt BETWEEN $$begindatekey and $$enddatekey and\r\n\tdata like '%\\\\\"ssid\\\\\":%' -- \u8fd9\u91cc\u7684\u53cc\u5f15\u53f7\u300c\"\u300d\u8981\u7528\u300c\\\u300d\u8fdb\u884c\u8f6c\u4e49\r\n;\r\n<\/pre>\n<p>&amp;<\/p>\n<pre class=\"lang:default decode:true \">select json_tuple('{\"optional\":\"unknown\",\"wifiList\":\"[{\\\"bssid\\\":\\\"12:34:56:78:c4:85\\\",\\\"ssid\\\":\\\"Xiaomi_XS\\\"},{\\\"bssid\\\":\\\"12:34:56:78:c4:86\\\",\\\"ssid\\\":\\\"Xiaomi_5G\\\"},{\\\"bssid\\\":\\\"7c:03:c9:e3:95:74\\\",\\\"ssid\\\":\\\"ChinaNet-HfVw\\\"}]\",\"IMSI\":\"351036391715285\",\"dpi\":\"588\",\"timestamp\":\"1542365379014\",\"coordinates\":\"36.733577|125.237956\",\"startupTime\":\"1542391575\",\"totalMemory\":\"5964230656\",\"availableMemory\":\"1474846720\",\"serial\":\"abcd\",\"currentWifi\":\"[{\\\"bssid\\\":\\\"12:34:56:78:c4:85\\\",\\\"rssi\\\":-34,\\\"ssid\\\":\\\"Xiaomi_XS\\\"}]\",\"systemVolume\":\"83\"}', 'currentWifi');\r\n-- NULL\r\n-- json_tuple \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ea\u652f\u6301json\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u7b26\u5408json\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5426\u5219\u4f1a\u5c06\u5176\u4f5c\u4e3a\u975e\u6cd5json\u6765\u5904\u7406\uff0c\u5728\u53d6\u4efb\u4f55\u5b57\u6bb5\u90fd\u4f1a\u8fd4\u56deNULL\u3002\r\n\r\nselect json_tuple('{\"name\":\"jack\",\"server\":\"www.qq.com\"}','server','name');\r\n-- www.qq.com\tjack\r\n\r\nselect json_tuple('{\"store\":{\"fruit\":[{\"weight\":8,\"type\":\"apple\"},{\"weight\":9,\"type\":\"pear\"}],\"bicycle\":{\"price\":19.951,\"color\":\"red1\"}},\"currentWifi\":[{\"bssid\":\"12:34:56:78:c4:90\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a9\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a8\",\"ssid\":\"wifi-inc\"}],\"email\":\"amy@only_for_json_udf_test.net\",\"owner\":\"amy1\"}', 'currentWifi', 'currentWifi[0]');\r\n-- [{\"bssid\":\"12:34:56:78:c4:90\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a9\",\"ssid\":\"wifi-guest\"},{\"bssid\":\"12:34:56:78:c4:a8\",\"ssid\":\"wifi-inc\"}]\tNULL\r\n-- json_tuple \u8fd9\u4e2a\u652f\u6301\u4e00\u6b21\u53d6\u591a\u4e2akey\uff0c\u4f46\u662f\u4e0d\u652f\u6301\u53d6\u5d4c\u5957\u7684\u5185\u5bb9<\/pre>\n<p>&nbsp;<\/p>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u94fe\u63a5\uff1a\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n<ul>\n<li><a href=\"https:\/\/blog.csdn.net\/lsr40\/article\/details\/79399166\">hive\u52a0\u8f7djson\u6570\u636e\u548c\u89e3\u6790json<\/a><\/li>\n<li><a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/Hive\/LanguageManual+UDF#LanguageManualUDF-json_tuple\">json_tuple<\/a><\/li>\n<li><a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/Hive\/LanguageManual+UDF#LanguageManualUDF-get_json_object\">get_json_object<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/kwu_ganymede\/article\/details\/52947809\">Hive\u5904\u7406JSON\u5b57\u7b26\u4e32<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/djz19890117\/article\/details\/79165281\">hive\u4e2d\u89e3\u6790json\u6570\u7ec4<\/a><\/li>\n<li><a href=\"https:\/\/www.cnblogs.com\/yurunmiao\/p\/4728285.html\">Hive JSON\u6570\u636e\u5904\u7406\u7684\u4e00\u70b9\u63a2\u7d22<\/a><\/li>\n<li><a href=\"https:\/\/www.iteblog.com\/archives\/2362.html\">\u5982\u4f55\u5728 Apache Hive \u4e2d\u89e3\u6790 Json \u6570\u7ec4<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/42162559\/nested-json-in-hive\">Nested json in hive<\/a><\/li>\n<li><a href=\"http:\/\/thornydev.blogspot.com\/2013\/07\/querying-json-records-via-hive.html\">Querying JSON records via Hive<\/a><\/li>\n<li><a href=\"https:\/\/engineering.skybettingandgaming.com\/2015\/01\/20\/parsing-json-in-hive\/\">SerDe vs UDF \u2013 parsing JSON in Hive<\/a><\/li>\n<\/ul>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u6700\u8fd1\u7ecf\u5e38\u4f7f\u7528Hive\u8fdb\u884c\u6570\u636e\u5206\u6790\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u6bd4\u8f83\u5178\u578b\u7684\u573a\u666f\u5c31\u662f\u2014\u2014\u90e8\u5206\u6709\u6548\u7684\u6570\u636e\u5728\u4e00\u4e2a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,12],"tags":[1263,1261,181,1264,1262],"class_list":["post-4208","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","category-tools","tag-get_json_object","tag-hive","tag-json","tag-json_tuple","tag-sql"],"views":24879,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=4208"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4208\/revisions"}],"predecessor-version":[{"id":4210,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4208\/revisions\/4210"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=4208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=4208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=4208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}