{"id":160133,"date":"2024-11-03T20:33:18","date_gmt":"2024-11-03T12:33:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160133\/"},"modified":"2024-11-03T20:33:19","modified_gmt":"2024-11-03T12:33:19","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-fetch-size","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160133\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase Fetch Size"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-fetch-size-NwSpKnPwyW\">OceanBase \u6559\u7a0b\uff1aOceanBase Fetch Size<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6027\u80fd\u548c\u6548\u7387\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002OceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u512a\u5316\u6578\u64da\u7684\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\u3002\u5176\u4e2d\uff0cFetch Size \u662f\u4e00\u500b\u91cd\u8981\u7684\u53c3\u6578\uff0c\u5c0d\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u5177\u6709\u986f\u8457\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-fetch-size%ef%bc%9f-NwSpKnPwyW\">\u4ec0\u9ebc\u662f Fetch Size\uff1f<\/h2>\n<p>Fetch Size \u662f\u6307\u5728\u4e00\u6b21\u67e5\u8a62\u4e2d\uff0c\u6578\u64da\u5eab\u5f9e\u670d\u52d9\u5668\u7aef\u4e00\u6b21\u6027\u63d0\u53d6\u7684\u8a18\u9304\u6578\u91cf\u3002\u9019\u500b\u53c3\u6578\u7684\u8a2d\u7f6e\u6703\u5f71\u97ff\u5230\u6578\u64da\u7684\u50b3\u8f38\u6548\u7387\u548c\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u7576 Fetch Size \u8a2d\u7f6e\u5f97\u7576\u6642\uff0c\u53ef\u4ee5\u6e1b\u5c11\u7db2\u7d61\u5f80\u8fd4\u7684\u6b21\u6578\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u8b80\u53d6\u901f\u5ea6\u3002<\/p>\n<h2 id=\"fetch-size-%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-NwSpKnPwyW\">Fetch Size \u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u7576\u61c9\u7528\u7a0b\u5e8f\u767c\u51fa\u67e5\u8a62\u8acb\u6c42\u6642\uff0c\u6578\u64da\u5eab\u6703\u6839\u64da Fetch Size \u7684\u8a2d\u7f6e\u4f86\u6c7a\u5b9a\u4e00\u6b21\u6027\u8fd4\u56de\u591a\u5c11\u689d\u8a18\u9304\u3002\u5047\u8a2d Fetch Size \u8a2d\u7f6e\u70ba 100\uff0c\u5247\u6bcf\u6b21\u67e5\u8a62\u5c07\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6 100 \u689d\u8a18\u9304\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u591a\u6b21\u8acb\u6c42\u7684\u958b\u92b7\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u80fd\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae-fetch-size-NwSpKnPwyW\">\u5982\u4f55\u8a2d\u7f6e Fetch Size<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c\u8a2d\u7f6e Fetch Size \u53ef\u4ee5\u901a\u904e JDBC \u9023\u63a5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\n\npublic class OceanBaseFetchSizeExample {\n    public static void main(String[] args) {\n        try {\n            \/\/ \u9023\u63a5\u5230 OceanBase \u6578\u64da\u5eab\n            Connection connection = DriverManager.getConnection(\"jdbc:oceanbase:\/\/:\/\", \"\", \"\");\n            Statement statement = connection.createStatement();\n            \n            \/\/ \u8a2d\u7f6e Fetch Size\n            statement.setFetchSize(100);\n            \n            \/\/ \u57f7\u884c\u67e5\u8a62\n            ResultSet resultSet = statement.executeQuery(\"SELECT * FROM your_table\");\n            \n            while (resultSet.next()) {\n                \/\/ \u8655\u7406\u7d50\u679c\n                System.out.println(resultSet.getString(\"your_column\"));\n            }\n            \n            \/\/ \u95dc\u9589\u9023\u63a5\n            resultSet.close();\n            statement.close();\n            connection.close();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"fetch-size-%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-NwSpKnPwyW\">Fetch Size \u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u6839\u64da\u61c9\u7528\u9700\u6c42\u8abf\u6574\uff1a<\/strong>\u4e0d\u540c\u7684\u61c9\u7528\u5834\u666f\u5c0d Fetch Size \u7684\u9700\u6c42\u4e0d\u540c\u3002\u5c0d\u65bc\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u8f03\u5c0f\u7684 Fetch Size\uff1b\u800c\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u6279\u91cf\u64cd\u4f5c\uff0c\u5247\u53ef\u4ee5\u8a2d\u7f6e\u8f03\u5927\u7684 Fetch Size\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u548c\u8abf\u6574\uff1a<\/strong>\u5728\u5be6\u969b\u4f7f\u7528\u4e2d\uff0c\u5efa\u8b70\u9032\u884c\u6027\u80fd\u6e2c\u8a66\uff0c\u6839\u64da\u6e2c\u8a66\u7d50\u679c\u8abf\u6574 Fetch Size\uff0c\u4ee5\u9054\u5230\u6700\u4f73\u6027\u80fd\u3002<\/li>\n<li><strong>\u76e3\u63a7\u6027\u80fd\uff1a<\/strong>\u5b9a\u671f\u76e3\u63a7\u6578\u64da\u5eab\u7684\u6027\u80fd\u6307\u6a19\uff0c\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u8abf\u6574 Fetch Size\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u9ad8\u6548\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-NwSpKnPwyW\">\u7d50\u8ad6<\/h2>\n<p>Fetch Size \u662f OceanBase \u6578\u64da\u5eab\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6027\u80fd\u8abf\u512a\u53c3\u6578\u3002\u901a\u904e\u5408\u7406\u8a2d\u7f6e Fetch Size\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\uff0c\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u3002\u4e86\u89e3 Fetch Size \u7684\u5de5\u4f5c\u539f\u7406\u53ca\u5176\u6700\u4f73\u5be6\u8e10\uff0c\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u5728\u4f7f\u7528 OceanBase \u6642\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u9ad4\u9a57\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u96f2\u670d\u52d9\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to optimize data retrieval in OceanBase with the Fetch Size feature. Enhance performance and efficiency in your database operations.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-160133","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=160133"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160133\/revisions"}],"predecessor-version":[{"id":160134,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160133\/revisions\/160134"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}