{"id":50259,"date":"2023-05-17T07:41:19","date_gmt":"2023-01-12T15:11:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/spark-cassandra%e4%b8%ad%e8%bf%87%e6%bb%a4%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0\/"},"modified":"2024-04-30T04:35:17","modified_gmt":"2024-04-29T20:35:17","slug":"spark-cassandra%e4%b8%ad%e8%bf%87%e6%bb%a4%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/spark-cassandra%e4%b8%ad%e8%bf%87%e6%bb%a4%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0\/","title":{"rendered":"Spark + Cassandra\u4e2d\u8fc7\u6ee4\u5668\u7684\u4f7f\u7528\u793a\u4f8b\u7b14\u8bb0"},"content":{"rendered":"<p>\u76ee\u524d\u5c1a\u672a\u6f84\u6e05\u7684\u95ee\u9898<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">&gt;=, &lt;= \u3067range filter\u3092\u52b9\u7387\u7684\u306b\u3067\u304d\u308b\u304b\u3069\u3046\u304b\uff1f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">column\u304cpartition key, clustering key\u3067\u6319\u52d5\u304c\u9055\u3046\u304c\u305d\u306e\u5dee\u7570\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3067\u304d\u3066\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3055\u3089\u306b\u3001cqlsh\u3067\u306e\u5834\u5408\u3068\u3001spark\u3067\u51e6\u7406\u3055\u305b\u305f\u5834\u5408\u306e\u9055\u3044\u3001spark\u4e0a\u3067\u306epartition\u304c\u3069\u3046\u306a\u308b\u304b\u304c\u5b8c\u5168\u7406\u89e3\u3067\u304d\u3066\u306a\u3044\u3002<\/ul>\n<p>\u76ee\u524d\u7684\u89e3\u7b54\u662f\uff0c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">datetime(e.g. 2016010501)\u3092date, hour\u3067\u4f5c\u3063\u3066\u3001partition key\u306b\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">spark\u3067\u5f15\u304f\u3068\u304d\u306f\u3001<\/ul>\n<pre class=\"post-pre\"><code>sc.CassandraTable(\"select * from table datetime = 2016010500\")\r\n<\/code><\/pre>\n<p>\u5c31\u50cf\u8fd9\u6837\uff0c\u6bcf\u5929\u7684\u6570\u636e\u8fdb\u884c\u4e8624\u6b21\u67e5\u8be2\uff0c\u7136\u540e\u8fdb\u884c\u4e86\u5408\u5e76\u548c\u91cd\u65b0\u5206\u533a\u5904\u7406\u3002<\/p>\n<ul class=\"post-ul\">in, &gt;=, &lt;=\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u3044\u304c\u3001\u305d\u306e\u5834\u5408\u3001\u5168\u306a\u3081\u3057\u3066\u9045\u304f\u3066\u4f7f\u3048\u306a\u3044\u3002<\/ul>\n<h1>\u5982\u679c\u662fSparkSQL\u7684\u60c5\u51b5\u4e0b<\/h1>\n<p>\u5c06\u6240\u6709\u9879\u76ee\u8fdb\u884c\u8ba1\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code>val cc = new CassandraSQLContext(sc)\r\nval df = cc.sql(\"select * from table\")\r\ndf.show\r\ndf.count\r\n<\/code><\/pre>\n<p>\u65e0\u8bba\u5982\u4f55<\/p>\n<p>\u5373\u4f7f\u5728where\u5b50\u53e5\u4e2d\u8fdb\u884c\u7b5b\u9009\u4e5f\u6ca1\u6709\u7528<\/p>\n<pre class=\"post-pre\"><code>val cc = new CassandraSQLContext(sc)\r\nval df = cc.sql(\"select * from table where datetime &gt;= '2016-01-01 00:00:00' and datetime &lt;= '2016-01-01 23:59:59'\")\r\ndf.show\r\ndf.count\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0cdatetime\u662f\u5206\u533a\u952e\uff0c\u6240\u4ee5partitions\u6570\u91cf\u53d8\u5f97\u76f8\u540c\uff0c\u8fd9\u662f\u4e2a\u8c1c\u3002<\/p>\n<h1>\u5bf9\u4e8e CassandraTable<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">sc.cassandraTable(&#8220;select * from table datetime in (2016010500, &#8230;, 2016010523)&#8221;)\u306a\u3069\u3068\u3057\u3066\u3001rdd\u3092\u3068\u3063\u3066#partitions=1\u3068\u306a\u3063\u3066\u4f7f\u3048\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">0 -23\u3067\u53d6\u5f97\u3057\u3066\u3001union\u3057\u3066\u3001repartition\u3057\u3066\u3059\u308b\u306a\u3069\u3057\u3066\u5bfe\u5fdc<\/ul>\n<p>\u8c1c\u8bed\uff0c\u8bef\u89e3\u5907\u5fd8\u5f55<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">partition key\u306e\u4e0d\u7b49\u53f7\u3001range filtertoken\u3092\u4f7f\u3046\u304c\u5f53\u7136\u3001\u4e0d\u7b49\u53f7\u306f\u5909\u306a\u6319\u52d5\u306b\u306a\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3000token\u306f\u30cf\u30c3\u30b7\u30e5\u5024\u306a\u306e\u3067\u5f53\u305f\u308a\u524d\u3002\u3002\u3002<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u524d\u5c1a\u672a\u6f84\u6e05\u7684\u95ee\u9898 &gt;=, &lt;= \u3067range filter\u3092\u52b9\u7387\u7684\u306b\u3067\u304d\u308b\u304b\u3069\u3046\u304b\uff1f &#038;nbsp [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50259","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Spark + Cassandra\u4e2d\u8fc7\u6ee4\u5668\u7684\u4f7f\u7528\u793a\u4f8b\u7b14\u8bb0 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/spark-cassandra\u4e2d\u8fc7\u6ee4\u5668\u7684\u4f7f\u7528\u793a\u4f8b\u7b14\u8bb0\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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