{"id":50233,"date":"2022-12-20T04:37:56","date_gmt":"2023-06-20T19:01:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e5%9c%a8cassandra%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%80%92%e5%a2%9e%e6%93%8d%e4%bd%9c%e3%80%82\/"},"modified":"2024-04-29T06:08:19","modified_gmt":"2024-04-28T22:08:19","slug":"%e6%88%91%e6%83%b3%e5%9c%a8cassandra%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%80%92%e5%a2%9e%e6%93%8d%e4%bd%9c%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e5%9c%a8cassandra%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%80%92%e5%a2%9e%e6%93%8d%e4%bd%9c%e3%80%82\/","title":{"rendered":"\u6211\u60f3\u5728Cassandra\u6570\u636e\u5e93\u4e2d\u8fdb\u884c\u9012\u589e\u64cd\u4f5c"},"content":{"rendered":"<h1>\u7b80\u800c\u8a00\u4e4b<\/h1>\n<p>\u4f7f\u7528\u8ba1\u6570\u5668\u7c7b\u578b\u3002<\/p>\n<h1>\u89e3\u91ca<\/h1>\n<h2>\u6211\u60f3\u589e\u52a0\/\u51cf\u5c11<\/h2>\n<p>\u5728\u4e2d\u6587\u4e2d\u5e38\u89c1\u7684\u4f8b\u5b50\u5305\u62ecPV\uff08\u9875\u9762\u6d4f\u89c8\u91cf\uff09\u3001\u63a8\u6587\u6570\u548c\u6536\u85cf\u6570\u3002<br \/>\n\u7ecf\u5e38\u6211\u4eec\u90fd\u9700\u8981\u7b80\u5355\u5730\u4fdd\u7559\u8fd9\u4e9b\u6570\u636e\u7684\u5217\uff0c\u5bf9\u5427\uff1f<\/p>\n<p>\u6bd4\u5982\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u7c7b\u4f3c\u4e0b\u9762\u7684\u8868\uff08\u5217\u65cf\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>CREATE TABLE page_view_counts(\r\n  pv int,\r\n  url_name varchar,\r\n  page_name varchar,\r\n  PRIMARY KEY (url_name, page_name)\r\n);\r\n<\/code><\/pre>\n<p>\u542c\u8bf4\u4f60\u5bf9MySQL\u5f88\u719f\u6089\u3002<br \/>\n\u4f60\u89c9\u5f97\u5199\u4e0b\u9762\u8fd9\u6837\u7684\u67e5\u8be2\u8bed\u53e5\u6ca1\u95ee\u9898\u5427\uff1f<\/p>\n<pre class=\"post-pre\"><code>UPDATE page_view_counts\r\n SET pv = pv + 1\r\n WHERE url_name='www.datastax.com' AND page_name='home';\r\n<\/code><\/pre>\n<p>\u592a\u751c\u4e86\u3002CQL\u5e76\u4e0d\u662f\u90a3\u4e48\u53cb\u5584\u3002<\/p>\n<pre class=\"post-pre\"><code>UPDATE page_view_counts SET pv = pv + 1 WHERE url_name='www.datastax.com' AND page_name='home';\r\n-&gt; Bad Request: Invalid operation (pv = pv + 1) for non counter column legion\r\n<\/code><\/pre>\n<p>\u60a8\u751f\u6c14\u4e86\u3002<br \/>\n\u8fd9\u6837\u505a\u53ea\u662f\u4e3a\u4e86\u589e\u52a0 pv \u503c\uff0c\u5c31\u9700\u8981\u989d\u5916\u5730\u9009\u62e9\u5f53\u524d\u7684 pv \u503c\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u8ba9\u6211\u4eec\u50cf\u9519\u8bef\u4fe1\u606f\u4e2d\u63d0\u5230\u7684\u90a3\u6837\u4f7f\u7528\u4e00\u4e2a\u540d\u4e3a counter \u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<pre class=\"post-pre\"><code>CREATE TABLE counterks.page_view_counts(\r\n  pv counter, \/\/ \u30b3\u30ec\r\n  url_name varchar,\r\n  page_name varchar,\r\n  PRIMARY KEY (url_name, page_name)\r\n);\r\n<\/code><\/pre>\n<p>\u518d\u4e00\u6b21\u3002<\/p>\n<pre class=\"post-pre\"><code>UPDATE page_view_counts SET pv = pv + 1 WHERE url_name='www.datastax.com' AND page_name='home';\r\n-&gt; OK\r\n<\/code><\/pre>\n<h1>\u8bf7\u53c2\u8003<\/h1>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u800c\u8a00\u4e4b \u4f7f\u7528\u8ba1\u6570\u5668\u7c7b\u578b\u3002 \u89e3\u91ca \u6211\u60f3\u589e\u52a0\/\u51cf\u5c11 \u5728\u4e2d\u6587\u4e2d\u5e38\u89c1\u7684\u4f8b\u5b50\u5305\u62ecPV\uff08\u9875\u9762\u6d4f\u89c8\u91cf\uff09\u3001\u63a8\u6587\u6570\u548c\u6536\u85cf\u6570\u3002  [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50233","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) - 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