{"id":209952,"date":"2014-01-22T14:50:03","date_gmt":"2014-01-22T10:50:03","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=209952"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=209952","title":{"rendered":"<span class=\"post_title\">\u0412\u044b\u0431\u043e\u0440\u043a\u0430 \u0438\u0437 \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u043c\u044b\u0445 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0439 \u0432 PostgreSQL 9.3<\/span>"},"content":{"rendered":"<div class=\"content html_format\">   \t<img decoding=\"async\" src=\"http:\/\/habr.habrastorage.org\/post_images\/90e\/447\/bb5\/90e447bb5d1ecc96ed19b6827bc33c16.png\"\/><br \/>  \u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435, \u0445\u0430\u0431\u0440\u0430\u0447\u0435\u043b\u043e\u0432\u0435\u043a\u0438! \u0412\u044b, \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e, \u0443\u0436\u0435 \u043f\u043e\u0449\u0443\u043f\u0430\u043b\u0438 <a href=\"http:\/\/www.postgresql.org\/docs\/9.3\/static\/rules-materializedviews.html\">\u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f<\/a>, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0438\u0435\u0441\u044f \u0432 <b>PostgreSQL<\/b> 9.3. \u041e\u0434\u043d\u0438\u043c \u0438\u0437 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432 \u0435\u0441\u0442\u044c \u0442\u043e, \u0447\u0442\u043e \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u044d\u043a\u0441\u043a\u043b\u044e\u0437\u0438\u0432\u043d\u0430\u044f (ACCESS EXCLUSIVE) \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0430, \u0434\u0435\u043b\u0430\u044e\u0449\u0430\u044f \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u043c \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043a \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044e. \u0412 <b>PostgreSQL<\/b> 9.4 <a href=\"http:\/\/michael.otacoo.com\/postgresql-2\/postgres-9-4-feature-highlight-refresh-concurrently-a-materialized-view\/\">\u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f<\/a> \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0447\u0442\u0435\u043d\u0438\u044f \u0438\u0437 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f. \u041d\u0443, \u0430 \u043f\u043e\u043a\u0430, \u0432 \u044d\u0442\u043e\u0439 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0437\u0430\u043c\u0435\u0442\u043a\u0435, \u044f \u0445\u043e\u0447\u0443 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u044c \u043e\u0434\u0438\u043d \u0438\u0437 \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u0432\u044b\u0445\u043e\u0434\u0430 \u0438\u0437 \u044d\u0442\u043e\u0433\u043e \u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u044f.<br \/>  <a name=\"habracut\"><\/a><br \/>  \u041f\u043e\u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u043c \u0432 \u044d\u0442\u043e\u043c \u0434\u0435\u043b\u0435 <a href=\"http:\/\/ru.wikipedia.org\/wiki\/%D0%94%D0%B2%D0%BE%D0%B9%D0%BD%D0%B0%D1%8F_%D0%B1%D1%83%D1%84%D0%B5%D1%80%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D1%8F\">\u0434\u0432\u043e\u0439\u043d\u0430\u044f \u0431\u0443\u0444\u0435\u0440\u0438\u0437\u0430\u0446\u0438\u044f<\/a>. \u0421\u0443\u0442\u044c \u0435\u0435 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0441\u043e\u0437\u0434\u0430\u044e\u0442\u0441\u044f \u0434\u0432\u0430 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u043f\u043e\u043a\u0430 \u043e\u0434\u043d\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u0442\u0441\u044f (\u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u0438, \u043e\u0442 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u044d\u0442\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0431\u043b\u043e\u043a\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 ACCESS SHARE, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u0435\u043b\u0430\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043a \u043d\u0438\u043c), \u0441\u043e \u0432\u0442\u043e\u0440\u044b\u043c \u043c\u043e\u0436\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c. \u041a\u0430\u043a \u0442\u043e\u043b\u044c\u043a\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0437\u0430\u0432\u0435\u0440\u0448\u0438\u0442\u0441\u044f, \u043c\u0435\u043d\u044f\u0435\u043c \u0438\u0445 \u043c\u0435\u0441\u0442\u0430\u043c\u0438.<\/p>\n<p>  \u0412\u0441\u043f\u043e\u043c\u043e\u0433\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0439:  <\/p>\n<pre><code class=\"sql\">CREATE OR REPLACE FUNCTION public.create_materialized_view ( p_viewname text, p_basename text ) RETURNS void AS $BODY$ BEGIN \tEXECUTE 'CREATE MATERIALIZED VIEW ' || p_viewname || ' AS SELECT * FROM ' || p_basename; \tEXECUTE 'CREATE MATERIALIZED VIEW ' || p_viewname || '_back AS SELECT * FROM ' || p_basename; END  $BODY$ LANGUAGE plpgsql VOLATILE;  CREATE OR REPLACE FUNCTION public.drop_materialized_view ( p_viewname text ) RETURNS void AS $BODY$ BEGIN \tEXECUTE 'DROP MATERIALIZED VIEW ' || p_viewname; \tEXECUTE 'DROP MATERIALIZED VIEW ' || p_viewname || '_back'; END  $BODY$ LANGUAGE plpgsql VOLATILE; <\/code><\/pre>\n<p>  \u0424\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u043e\u0431\u043c\u0435\u043d\u0430 \u0431\u0443\u0444\u0435\u0440\u043e\u0432 \u2014 \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u043c <i>back<\/i>-\u0431\u0443\u0444\u0435\u0440 \u0438 \u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u044b\u0432\u0430\u0435\u043c <i>back<\/i> \u0432 <i>front<\/i> \u0438 \u043d\u0430\u043e\u0431\u043e\u0440\u043e\u0442.  <\/p>\n<pre><code class=\"sql\">CREATE OR REPLACE FUNCTION public.swap_materialized_view ( p_viewname text ) RETURNS void AS $BODY$ BEGIN \tEXECUTE 'REFRESH MATERIALIZED VIEW ' || p_viewname || '_back'; \tEXECUTE 'ALTER MATERIALIZED VIEW ' || p_viewname || ' RENAME TO ' || split_part ( p_viewname, '.', 2 ) || '_temp'; \tEXECUTE 'ALTER MATERIALIZED VIEW ' || p_viewname || '_back RENAME TO ' || split_part ( p_viewname, '.', 2 ); \tEXECUTE 'ALTER MATERIALIZED VIEW ' || p_viewname || '_temp RENAME TO ' || split_part ( p_viewname, '.', 2 ) || '_back'; END  $BODY$ LANGUAGE plpgsql VOLATILE; <\/code><\/pre>\n<p>  \u0422\u0430\u0436\u0435 \u043d\u0435 \u043f\u043e\u043c\u0435\u0448\u0430\u0435\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0438\u043d\u0434\u0435\u043a\u0441\u043e\u0432 (\u0442\u0430\u043a \u043a\u0430\u043a \u043f\u0440\u0438\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0438\u0445 \u0434\u0443\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f <i>back<\/i>-\u0431\u0443\u0444\u0435\u0440\u0430):  <\/p>\n<pre><code class=\"sql\">CREATE OR REPLACE FUNCTION public.create_materialized_view_index ( p_viewname text, p_indexname text, p_columns text[] ) RETURNS void AS $BODY$ BEGIN \tEXECUTE 'CREATE INDEX ' || p_indexname || ' ON ' || p_viewname || ' ( ' || array_to_string ( p_columns, ',' ) || ' )'; \tEXECUTE 'CREATE INDEX ' || p_indexname || '_back ON ' || p_viewname || '_back ( ' || array_to_string ( p_columns, ',' ) || ' )'; END  $BODY$ LANGUAGE plpgsql VOLATILE; <\/code><\/pre>\n<p>  \u0421\u043a\u0440\u0438\u043f\u0442 <i>update_mv<\/i>, \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u044e\u0449\u0438\u0439 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f (\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 \u0437\u0430\u0434\u0430\u043d\u0438\u0438 cron):  <\/p>\n<pre><code class=\"bash\">#!\/bin\/bash  HOST=&quot;localhost&quot; PORT=&quot;5432&quot; USER=&quot;postgres&quot; DATABASE=&quot;mydb&quot;  VIEWS=() VIEWS+=('public.mv_order') VIEWS+=('public.mv_delivery')  VCOUNT=${#VIEWS[@]}  for ((i = 0; i &lt; ${VCOUNT}; i++)) do         VIEW=${VIEWS[$i]}         QUERY=&quot;SELECT public.swap_materialized_view('$VIEW')&quot;          if psql -h $HOST -p $PORT -U $USER -d $DATABASE -q -c &quot;SET client_min_messages = ERROR; $QUERY&quot;&gt;\/dev\/null 1&gt;&1; then                 logger -p cron.notice -t update_mv Updated materialized view $VIEW         else                 logger -p cron.notice -t update_mv Can\\'t update materialized view $VIEW         fi done <\/code><\/pre>\n<p>  \u0418, \u0441\u043e\u0431\u0441\u0442\u0432\u0435\u043d\u043d\u043e, \u0441\u0430\u043c\u043e cron-\u0437\u0430\u0434\u0430\u043d\u0438\u0435 (\u0434\u043b\u044f fcron) \u2014 \u043e\u0431\u043d\u043e\u0432\u043b\u044f\u0435\u043c \u0440\u0430\u0437 \u0432 \u0447\u0430\u0441:  <\/p>\n<pre><code class=\"bash\">@mail(false),runatreboot(true) 1h update_mv <\/code><\/pre>\n<p>  \u041f\u0440\u0438\u043c\u0435\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f:  <\/p>\n<pre><code class=\"sql\">SELECT public.create_materialized_view ( 'public.mv_order', 'public.vw_order' ); -- public.vw_order - \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 SELECT public.create_materialized_view ( 'public.mv_delivery, 'public.vw_delivery' ); -- public.vw_delivery - \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 SELECT public.create_materialized_view_index ( 'public.mv_order', 'idx_mv_order_purchase', '{purchaser_name,order_date}'::text[] ); <\/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\/209952\/\"> http:\/\/habrahabr.ru\/post\/209952\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"content html_format\">   \t<img decoding=\"async\" src=\"http:\/\/habr.habrastorage.org\/post_images\/90e\/447\/bb5\/90e447bb5d1ecc96ed19b6827bc33c16.png\"\/><br \/>  \u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435, \u0445\u0430\u0431\u0440\u0430\u0447\u0435\u043b\u043e\u0432\u0435\u043a\u0438! \u0412\u044b, \u0432\u0435\u0440\u043e\u044f\u0442\u043d\u043e, \u0443\u0436\u0435 \u043f\u043e\u0449\u0443\u043f\u0430\u043b\u0438 <a href=\"http:\/\/www.postgresql.org\/docs\/9.3\/static\/rules-materializedviews.html\">\u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f<\/a>, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0438\u0435\u0441\u044f \u0432 <b>PostgreSQL<\/b> 9.3. \u041e\u0434\u043d\u0438\u043c \u0438\u0437 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u043e\u0432 \u0435\u0441\u0442\u044c \u0442\u043e, \u0447\u0442\u043e \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u044d\u043a\u0441\u043a\u043b\u044e\u0437\u0438\u0432\u043d\u0430\u044f (ACCESS EXCLUSIVE) \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0430, \u0434\u0435\u043b\u0430\u044e\u0449\u0430\u044f \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u043c \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043a \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044e. \u0412 <b>PostgreSQL<\/b> 9.4 <a href=\"http:\/\/michael.otacoo.com\/postgresql-2\/postgres-9-4-feature-highlight-refresh-concurrently-a-materialized-view\/\">\u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f<\/a> \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0447\u0442\u0435\u043d\u0438\u044f \u0438\u0437 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f. \u041d\u0443, \u0430 \u043f\u043e\u043a\u0430, \u0432 \u044d\u0442\u043e\u0439 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0437\u0430\u043c\u0435\u0442\u043a\u0435, \u044f \u0445\u043e\u0447\u0443 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u044c \u043e\u0434\u0438\u043d \u0438\u0437 \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u0432\u044b\u0445\u043e\u0434\u0430 \u0438\u0437 \u044d\u0442\u043e\u0433\u043e \u043f\u043e\u043b\u043e\u0436\u0435\u043d\u0438\u044f.  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