{"id":12150,"date":"2018-12-07T22:32:08","date_gmt":"2018-12-07T21:32:08","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/"},"modified":"2023-06-09T17:14:07","modified_gmt":"2023-06-09T15:14:07","slug":"postgresql-get-my-database-server-name","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/","title":{"rendered":"PostgreSQL : Get my database server name"},"content":{"rendered":"

By Mouhamadou Diaw<\/strong><\/p>\n

I was looking for a build-in function to get the hostname of the server hosting my PostgreSQL cluster.
\nBut seems that there is no build-in function. Looking in the extensions, I find the extension hostname which can allow to get the database server host name.
\nIn this this blog I am explaining how to install and how to use it. The installation is very easy. The first step is to download it here <\/a>.<\/p>\n

After let\u2019s go to the directory where the archive was decompressed and let\u2019s run the command make<\/p>\n

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master<\/code>\/pg-hostname-master\/<\/code> [PG1] <\/code>ls<\/code><\/div>\n
Changes\u00a0 doc\u00a0 <\/code>hostname<\/code>.control\u00a0 Makefile\u00a0 META.json\u00a0 README.md\u00a0 sql\u00a0 src\u00a0 <\/code>test<\/code><\/div>\n
14:46:26 postgres@dbi-pg-essentials:<\/code>\/home\/postgres\/pg-hostname-master\/pg-hostname-master\/<\/code> [PG1] <\/code>ls<\/code><\/div>\n
Changes\u00a0 doc\u00a0 <\/code>hostname<\/code>.control\u00a0 Makefile\u00a0 META.json\u00a0 README.md\u00a0 sql\u00a0 src\u00a0 <\/code>test<\/code><\/div>\n
14:46:48 postgres@dbi-pg-essentials:<\/code>\/home\/postgres\/pg-hostname-<\/code><\/div>\n
<\/div>\n
master<\/code>\/pg-hostname-master\/<\/code> [PG1] <\/code>make<\/code><\/div>\n
gcc<\/code> -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-<\/code>format<\/code>-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -fpic -I. -I.\/ -I<\/code>\/u01\/app\/postgres\/product\/95\/db_0\/include\/server<\/code> -I<\/code>\/u01\/app\/postgres\/product\/95\/db_0\/include\/internal<\/code> -D_GNU_SOURCE -I<\/code>\/usr\/include\/libxml2<\/code>\u00a0\u00a0 -c -o src<\/code>\/hostname<\/code>.o src<\/code>\/hostname<\/code>.c<\/code><\/div>\n
gcc<\/code> -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-<\/code>format<\/code>-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -fpic -L<\/code>\/u01\/app\/postgres\/product\/95\/db_0\/lib<\/code> -Wl,--as-needed -Wl,-rpath,<\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/lib'<\/code>,--<\/code>enable<\/code>-new-dtags\u00a0 -shared -o src<\/code>\/hostname<\/code>.so src<\/code>\/hostname<\/code>.o<\/code><\/div>\n
cp<\/code> sql<\/code>\/hostname<\/code>.sql sql<\/code>\/hostname--1<\/code>.0.0.sql<\/code><\/div>\n
14:46:55 postgres@dbi-pg-essentials:<\/code>\/home\/postgres\/pg-hostname-<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Once done let\u2019s run the command make install<\/p>\n

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pg-<\/code>hostname<\/code>-master\/ [PG1] <\/code>make<\/code> install<\/code><\/div>\n
\/bin\/mkdir<\/code> -p <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/extension'<\/code><\/div>\n
\/bin\/mkdir<\/code> -p <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/extension'<\/code><\/div>\n
\/bin\/mkdir<\/code> -p <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/lib'<\/code><\/div>\n
\/bin\/mkdir<\/code> -p <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/doc\/extension'<\/code><\/div>\n
\/bin\/install<\/code> -c -m 644 .<\/code>\/\/hostname<\/code>.control <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/extension\/'<\/code><\/div>\n
\/bin\/install<\/code> -c -m 644 .<\/code>\/\/sql\/hostname--1<\/code>.0.0.sql .<\/code>\/\/sql\/hostname--unpackaged--1<\/code>.0.0.sql\u00a0 <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/extension\/'<\/code><\/div>\n
\/bin\/install<\/code> -c -m 755\u00a0 src<\/code>\/hostname<\/code>.so <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/lib\/'<\/code><\/div>\n
\/bin\/install<\/code> -c -m 644 .<\/code>\/\/doc\/hostname<\/code>.mmd <\/code>'\/u01\/app\/postgres\/product\/95\/db_0\/share\/doc\/extension\/'<\/code><\/div>\n
14:47:29 postgres@dbi-pg-essentials:<\/code>\/home\/postgres\/pg-hostname-master\/pg-hostname-master\/<\/code> [PG1]<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

If everything is ok we should now have the extension in our $PGHOME\/share\/extension<\/p>\n

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15:02:39 postgres@dbi-pg-essentials:[PG1] <\/code>ls<\/code> -ltra *<\/code>hostname<\/code>*<\/code><\/div>\n
-rw-r--r--. 1 postgres postgres 140 Dec\u00a0 5 14:47 <\/code>hostname<\/code>.control<\/code><\/div>\n
-rw-r--r--. 1 postgres postgres\u00a0 96 Dec\u00a0 5 14:47 <\/code>hostname<\/code>--1.0.0.sql<\/code><\/div>\n
-rw-r--r--. 1 postgres <\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

And that\u2019s all. We just have now have to install the extension in the database<\/p>\n

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postgres=<\/code># CREATE EXTENSION hostname;<\/code><\/div>\n
CREATE EXTENSION<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

And then now we can have the hostname of our the server<\/p>\n

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postgres=<\/code># SELECT hostname();<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>hostname<\/code><\/div>\n
-------------------<\/code><\/div>\n
\u00a0<\/code>dbi-pg-essentials<\/code><\/div>\n
(1 row)<\/code><\/div>\n
<\/div>\n
postgres=<\/code>#<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

By Mouhamadou Diaw I was looking for a build-in function to get the hostname of the server hosting my PostgreSQL cluster. But seems that there is no build-in function. Looking in the extensions, I find the extension hostname which can allow to get the database server host name. In this this blog I am explaining […]<\/p>\n","protected":false},"author":27,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[378,1513,77],"type_dbi":[],"class_list":["post-12150","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","tag-extension","tag-gethostname","tag-postgresql"],"acf":[],"yoast_head":"\nPostgreSQL : Get my database server name - dbi Blog<\/title>\n<meta name=\"description\" content=\"PostgreSQL, gethostname,extension\" \/>\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.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL : Get my database server name\" \/>\n<meta property=\"og:description\" content=\"PostgreSQL, gethostname,extension\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2018-12-07T21:32:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-09T15:14:07+00:00\" \/>\n<meta name=\"author\" content=\"Oracle Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Oracle Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\"},\"author\":{\"name\":\"Oracle Team\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/66ab87129f2d357f09971bc7936a77ee\"},\"headline\":\"PostgreSQL : Get my database server name\",\"datePublished\":\"2018-12-07T21:32:08+00:00\",\"dateModified\":\"2023-06-09T15:14:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\"},\"wordCount\":153,\"commentCount\":0,\"keywords\":[\"Extension\",\"gethostname\",\"PostgreSQL\"],\"articleSection\":[\"Database Administration & Monitoring\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/postgresql-get-my-database-server-name\/\",\"name\":\"PostgreSQL : Get my database server name - 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