{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kyanny.me%2Fentry%2F2016%2F05%2F19%2F023942\" title=\"Treasure Data (Presto) \u3067 MongoDB \u306e Array[BSON::ObjectId] \u578b\u306e\u30c7\u30fc\u30bf\u3092 string \u578b\u3068\u3057\u3066\u5165\u308c\u3066\u3057\u307e\u3063\u305f\u3068\u304d Array \u306b\u30d0\u30e9\u3057\u3066\u5c55\u958b\u3059\u308b - @kyanny&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","version":"1.0","published":"2016-05-19 02:39:42","author_url":"https://blog.hatena.ne.jp/a666666/","provider_url":"https://hatena.blog","height":"190","width":"100%","categories":[],"type":"rich","url":"https://blog.kyanny.me/entry/2016/05/19/023942","blog_url":"https://blog.kyanny.me/","title":"Treasure Data (Presto) \u3067 MongoDB \u306e Array[BSON::ObjectId] \u578b\u306e\u30c7\u30fc\u30bf\u3092 string \u578b\u3068\u3057\u3066\u5165\u308c\u3066\u3057\u307e\u3063\u305f\u3068\u304d Array \u306b\u30d0\u30e9\u3057\u3066\u5c55\u958b\u3059\u308b","author_name":"a666666","image_url":"http://cdn-ak.f.st-hatena.com/images/fotolife/a/a666666/20160519/20160519023725.png","description":"substr \u3067\u6587\u5b57\u5217\u304b\u3089\u30b4\u30df\u3092\u53d6\u308a\u9664\u304f split \u3067 string -> array \u306b\u3059\u308b UNNEST \u3067\u5c55\u958b\u3059\u308b 7.16. SELECT \u2014 Presto 0.147 Documentation SELECT * FROM ( VALUES( 1, '[573ca5ca6200b048be000001, 573ca5cc6200b048be000002]' ), ( 2, '[573ca5ca6200b048be000003, 573ca5cc6200b048be000004]' ) ) AS t( id, object_ids ) CROSS JOIN unnest( split\u2026","blog_title":"@kyanny's blog"}