{"id":217521,"date":"2014-03-29T19:46:02","date_gmt":"2014-03-29T15:46:02","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=217521"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=217521","title":{"rendered":"<span class=\"post_title\">\u041e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u0443\u0435\u043c LIMIT offset<\/span>"},"content":{"rendered":"<div class=\"content html_format\">   \t\u0412\u0435\u0437\u0434\u0435, \u0433\u0434\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f LIMIT offset \u0434\u043b\u044f \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0442\u0430\u0431\u043b\u0438\u0446, \u0440\u0430\u043d\u043e \u0438\u043b\u0438 \u043f\u043e\u0437\u0434\u043d\u043e \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0442\u0441\u044f \u0442\u043e\u0440\u043c\u043e\u0437\u0430. \u0417\u0430\u043f\u0440\u043e\u0441\u044b \u0432\u0438\u0434\u0430 <\/p>\n<pre><code class=\"php\">SELECT * FROM test_table ORDER BY id LIMIT 100000, 30<\/code><\/pre>\n<p>  \u043c\u043e\u0433\u0443\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u0441\u044f \u043e\u0447\u0435\u043d\u044c \u0434\u043e\u043b\u0433\u043e. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u043c\u043e\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435, \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u0441\u0430\u0439\u0442\u043e\u0432 \u043a\u043e\u043b-\u0432\u043e \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0435\u0432 \u043f\u0435\u0440\u0435\u0432\u0430\u043b\u0438\u043b\u043e \u0437\u0430 200\u043a \u0438 \u043f\u043e\u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u0430\u044f \u043d\u0430\u0432\u0438\u0433\u0430\u0446\u0438\u044f \u043f\u043e \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f\u043c \u043d\u0430\u0447\u0430\u043b\u0430 \u043e\u0449\u0443\u0442\u0438\u043c\u043e \u0442\u043e\u0440\u043c\u043e\u0437\u0438\u0442\u044c, \u0430 \u0432 mysql-slow.log \u0432\u0441\u0435 \u0447\u0430\u0449\u0435 \u0441\u0442\u0430\u043b\u0438 \u043f\u043e\u043f\u0430\u0434\u0430\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u0441 \u0432\u0440\u0435\u043c\u0435\u043d\u0435\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f 3-5\u0441\u0435\u043a.<br \/>  <a name=\"habracut\"><\/a><br \/>  \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f LIMIT 100000, 30 \u2014 mysql \u0432\u043d\u0430\u0447\u0430\u043b\u0435 \u043f\u0440\u043e\u0439\u0434\u0435\u0442\u0441\u044f \u043f\u043e \u043f\u0435\u0440\u0432\u044b\u043c 100000 \u0437\u0430\u043f\u0438\u0441\u044f\u043c \u0438 \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0442\u043e\u043c \u0432\u044b\u0431\u0435\u0440\u0435\u0442 \u043d\u0443\u0436\u043d\u044b\u0435 30. \u0418\u0437\u0431\u0435\u0436\u0430\u0442\u044c \u044d\u0442\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e, \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u0437\u0430\u043f\u0440\u043e\u0441 \u0432\u0438\u0434\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432 \u043e\u0431\u0449\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0442\u0430\u043a:  <\/p>\n<pre><code class=\"php\">SELECT * FROM test_table JOIN (SELECT id FROM test_table ORDER BY id LIMIT 100000, 30) as b ON b.id = test_table.id <\/code><\/pre>\n<p>  \u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u0440. \u0412 \u043c\u043e\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u0432\u0438\u0436\u043e\u043a DLE \u0438 \u0432 \u043d\u0435\u043c \u0437\u0430\u043f\u0440\u043e\u0441 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c:  <\/p>\n<pre><code class=\"php\">SELECT dle_comments.*... FROM dle_comments LEFT JOIN dle_post ON dle_comments.post_id=dle_post.id LEFT JOIN dle_users ON dle_comments.user_id=dle_users.user_id  ORDER BY id desc LIMIT 101000,30 <\/code><\/pre>\n<p>  \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0437\u0430\u043f\u0440\u043e\u0441 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0442\u0430\u043a:  <\/p>\n<pre><code class=\"php\">SELECT dle_comments.*... FROM dle_comments LEFT JOIN dle_post ON dle_comments.post_id=dle_post.id LEFT JOIN dle_users ON dle_comments.user_id=dle_users.user_id JOIN (select id FROM dle_comments ORDER BY id desc LIMIT 101000,30 ) as t ON t.id = dle_comments.id <\/code><\/pre>\n<p>  \u041d\u0430 \u0433\u0440\u0430\u0444\u0438\u043a\u0435 \u043c\u043e\u0436\u043d\u043e \u0443\u0432\u0438\u0434\u0435\u0442\u044c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0442\u0430\u043a\u043e\u0439 \u0437\u0430\u043c\u0435\u043d\u044b:<br \/>  <img decoding=\"async\" src=\"http:\/\/habrastorage.org\/getpro\/habr\/post_images\/37b\/60b\/e6e\/37b60be6ee588f91668454f81a901398.jpg\"\/><\/p>\n<p>  \u041a\u0430\u043a \u0432\u0438\u0434\u043d\u043e, \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c JOIN \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u043d\u0443\u0436\u043d\u043e\u043c \u0443\u0440\u043e\u0432\u043d\u0435 \u043d\u0435 \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e \u043e\u0442 \u0442\u043e\u0433\u043e \u043a\u0430\u043a \u0434\u0430\u043b\u0435\u043a\u043e \u0437\u0430\u0431\u0440\u0430\u043b\u0441\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432 \u0434\u0435\u0431\u0440\u0438 \u0441\u0430\u0439\u0442\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u043f\u043e\u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u0443\u044e \u043d\u0430\u0432\u0438\u0433\u0430\u0446\u0438\u044e.<\/p>\n<p>  PS. \u0424\u0438\u043a\u0441 \u0434\u043b\u044f DLE \u0434\u043b\u044f \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0435\u0432 (\u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u043c\u043e\u0436\u043d\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u0434\u043b\u044f \u0432\u0441\u0435\u0445 \u043d\u0430\u0432\u0438\u0433\u0430\u0446\u0438\u0438). \u0412 \u0444\u0430\u0439\u043b\u0435 comments.class.php<br \/>  \u043d\u0430\u0439\u0442\u0438  <\/p>\n<pre><code class=\"bash\">$sql_result = $this-&gt;db-&gt;query(  $this-&gt;query . &quot; LIMIT &quot; . $this-&gt;cstart . &quot;,&quot; . $this-&gt;comments_per_pages ); <\/code><\/pre>\n<p>  \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u044c \u044d\u0442\u0443 \u0441\u0442\u0440\u043e\u0447\u043a\u0443 \u043d\u0430:  <\/p>\n<pre><code class=\"bash\">$sql_result = $this-&gt;db-&gt;query( str_replace(&quot;ORDER BY id desc&quot;, &quot;JOIN (select id FROM &quot; . PREFIX . &quot;_comments ORDER BY id desc&quot; . &quot; LIMIT &quot; . $this-&gt;cstart . &quot;,&quot; . $this-&gt;comments_per_pages .&quot;) as t ON t.id = &quot; . PREFIX . &quot;_comments.id&quot;,$this-&gt;query) ); <\/code><\/pre>\n<div class=\"clear\"><\/div>\n<\/p><\/div>\n<p> \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438 <a href=\"http:\/\/habrahabr.ru\/post\/217521\/\"> http:\/\/habrahabr.ru\/post\/217521\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"content html_format\">   \t\u0412\u0435\u0437\u0434\u0435, \u0433\u0434\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f LIMIT offset \u0434\u043b\u044f \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0442\u0430\u0431\u043b\u0438\u0446, \u0440\u0430\u043d\u043e \u0438\u043b\u0438 \u043f\u043e\u0437\u0434\u043d\u043e \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0442\u0441\u044f \u0442\u043e\u0440\u043c\u043e\u0437\u0430. \u0417\u0430\u043f\u0440\u043e\u0441\u044b \u0432\u0438\u0434\u0430 <\/p>\n<pre><code class=\"php\">SELECT * FROM test_table ORDER BY id LIMIT 100000, 30<\/code><\/pre>\n<p>  \u043c\u043e\u0433\u0443\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u0441\u044f \u043e\u0447\u0435\u043d\u044c \u0434\u043e\u043b\u0433\u043e. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u043c\u043e\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435, \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u0441\u0430\u0439\u0442\u043e\u0432 \u043a\u043e\u043b-\u0432\u043e \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0435\u0432 \u043f\u0435\u0440\u0435\u0432\u0430\u043b\u0438\u043b\u043e \u0437\u0430 200\u043a \u0438 \u043f\u043e\u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u0430\u044f \u043d\u0430\u0432\u0438\u0433\u0430\u0446\u0438\u044f \u043f\u043e \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f\u043c \u043d\u0430\u0447\u0430\u043b\u0430 \u043e\u0449\u0443\u0442\u0438\u043c\u043e \u0442\u043e\u0440\u043c\u043e\u0437\u0438\u0442\u044c, \u0430 \u0432 mysql-slow.log \u0432\u0441\u0435 \u0447\u0430\u0449\u0435 \u0441\u0442\u0430\u043b\u0438 \u043f\u043e\u043f\u0430\u0434\u0430\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u0441 \u0432\u0440\u0435\u043c\u0435\u043d\u0435\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f 3-5\u0441\u0435\u043a.  <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-217521","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/217521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=217521"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/217521\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=217521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=217521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=217521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}