{"id":5193,"date":"2015-08-20T14:24:39","date_gmt":"2015-08-20T12:24:39","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/"},"modified":"2015-08-20T14:24:39","modified_gmt":"2015-08-20T12:24:39","slug":"connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/","title":{"rendered":"Connecting your PostgreSQL instance to an Oracle database &#8211; The PostgreSQL 9.5 way"},"content":{"rendered":"<p>As you might know PostgreSQL 9.5 is currently in alpha 2. One of the new features will be the possibility to <a href=\"http:\/\/www.postgresql.org\/docs\/9.5\/static\/sql-importforeignschema.html\" target=\"_blank\" rel=\"noopener\">import foreign schemas<\/a>. Having this<br \/>\n it is no longer required to create all the foreign tables which saves a lot of work.<\/p>\n<p>Setting up oracle_fdw was done in exactly the same way as in the <a href=\"http:\/\/dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database\/\" target=\"_blank\" rel=\"noopener\">previous post<\/a>. Make sure you use the latest version of oracle_fdw as some internals changed in PostgreSQL 9.5 which oracle_fdw depends on. The latest zipped version can be downloaded <a href=\"https:\/\/github.com\/laurenz\/oracle_fdw\/archive\/master.zip\" target=\"_blank\" rel=\"noopener\">here<\/a><\/p>\n<p>For this little demo I created the SCOTT user in my Oracle database ( $ORACLE_HOME\/rdbms\/admin\/utlsampl.sql ):<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\nSQL&gt; show user\nUSER is \"SCOTT\"\nSQL&gt; select table_name from user_tables;\n\nTABLE_NAME\n--------------------------------------------------------------------------------\nBONUS\nDEPT\nEMP\nSALGRADE\n\nSQL&gt; \n<\/pre>\n<p>On the PostgreSQL side lets create a schema and setup oracle_fdw:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\npostgres@oel7:\/home\/postgres\/ [PG6] psql postgres\npsql (9.5alpha2)\nType \"help\" for help.\n\npostgres=# create schema scott;\nCREATE SCHEMA\npostgres=# create server oracle foreign data wrapper oracle_fdw options (dbserver '\/\/192.168.22.242\/PROD.local' );\nCREATE SERVER\npostgres=# create user mapping for postgres server oracle options (user 'SCOTT', password 'tiger');\nCREATE USER MAPPING\n<\/pre>\n<p>Before PostgreSQL 9.5 now would be the time to create the foreign tables as they are defined in the Oracle database. But starting with PostgreSQL 9.5 we are able to do this:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\npostgres=# import foreign schema \"SCOTT\" from server oracle into scott;\nIMPORT FOREIGN SCHEMA\npostgres=# \n<\/pre>\n<p>This should have imported all the table definitions:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\npostgres=# set search_path='scott';\nSET\npostgres=# d \n              List of relations\n Schema |   Name   |     Type      |  Owner   \n--------+----------+---------------+----------\n scott  | bonus    | foreign table | postgres\n scott  | dept     | foreign table | postgres\n scott  | emp      | foreign table | postgres\n scott  | salgrade | foreign table | postgres\n(4 rows)\n\npostgres=# d+ dept\n                                    Foreign table \"scott.dept\"\n Column |         Type          | Modifiers | FDW Options  | Storage  | Stats target | Description \n--------+-----------------------+-----------+--------------+----------+--------------+-------------\n deptno | smallint              | not null  | (key 'true') | plain    |              | \n dname  | character varying(14) |           |              | extended |              | \n loc    | character varying(13) |           |              | extended |              | \nServer: oracle\nFDW Options: (schema 'SCOTT', \"table\" 'DEPT')\n\npostgres=# d+ emp\n                                          Foreign table \"scott.emp\"\n  Column  |              Type              | Modifiers | FDW Options  | Storage  | Stats target | Description \n----------+--------------------------------+-----------+--------------+----------+--------------+-------------\n empno    | smallint                       | not null  | (key 'true') | plain    |              | \n ename    | character varying(10)          |           |              | extended |              | \n job      | character varying(9)           |           |              | extended |              | \n mgr      | smallint                       |           |              | plain    |              | \n hiredate | timestamp(0) without time zone |           |              | plain    |              | \n sal      | numeric(7,2)                   |           |              | main     |              | \n comm     | numeric(7,2)                   |           |              | main     |              | \n deptno   | smallint                       |           |              | plain    |              | \nServer: oracle\nFDW Options: (schema 'SCOTT', \"table\" 'EMP')\n<\/pre>\n<p>What happens if we try to insert a row that violates the primary key on emp?<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\npostgres=# insert into emp values (7639,'aa','aa',7902,current_date,123,11,20);\nINSERT 0 1\npostgres=# insert into emp values (7639,'aa','aa',7902,current_date,123,11,20);\nERROR:  error executing query: OCIStmtExecute failed to execute remote query\nDETAIL:  ORA-00001: unique constraint (SCOTT.PK_EMP) violated\npostgres=# \n<\/pre>\n<p>Really, really cool. One command to get a whole schema definition out of an Oracle database. Makes life a lot easier.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As you might know PostgreSQL 9.5 is currently in alpha 2. One of the new features will be the possibility to import foreign schemas. Having this it is no longer required to create all the foreign tables which saves a lot of work. Setting up oracle_fdw was done in exactly the same way as in [&hellip;]<\/p>\n","protected":false},"author":29,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[77],"type_dbi":[],"class_list":["post-5193","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","tag-postgresql"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Connecting your PostgreSQL instance to an Oracle database - The PostgreSQL 9.5 way - dbi Blog<\/title>\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\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Connecting your PostgreSQL instance to an Oracle database - The PostgreSQL 9.5 way\" \/>\n<meta property=\"og:description\" content=\"As you might know PostgreSQL 9.5 is currently in alpha 2. One of the new features will be the possibility to import foreign schemas. Having this it is no longer required to create all the foreign tables which saves a lot of work. Setting up oracle_fdw was done in exactly the same way as in [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2015-08-20T12:24:39+00:00\" \/>\n<meta name=\"author\" content=\"Daniel Westermann\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@westermanndanie\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Westermann\" \/>\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\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\"},\"author\":{\"name\":\"Daniel Westermann\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d08e9bd996a89bd75c0286cbabf3c66\"},\"headline\":\"Connecting your PostgreSQL instance to an Oracle database &#8211; The PostgreSQL 9.5 way\",\"datePublished\":\"2015-08-20T12:24:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\"},\"wordCount\":204,\"commentCount\":0,\"keywords\":[\"PostgreSQL\"],\"articleSection\":[\"Database Administration &amp; Monitoring\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\",\"name\":\"Connecting your PostgreSQL instance to an Oracle database - The PostgreSQL 9.5 way - dbi Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#website\"},\"datePublished\":\"2015-08-20T12:24:39+00:00\",\"author\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d08e9bd996a89bd75c0286cbabf3c66\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/connecting-your-postgresql-instance-to-an-oracle-database-the-postgresql-9-5-way\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.dbi-services.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Connecting your PostgreSQL instance to an Oracle database &#8211; The PostgreSQL 9.5 way\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#website\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/\",\"name\":\"dbi Blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.dbi-services.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d08e9bd996a89bd75c0286cbabf3c66\",\"name\":\"Daniel Westermann\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/31350ceeecb1dd8986339a29bf040d4cd3cd087d410deccd8f55234466d6c317?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/31350ceeecb1dd8986339a29bf040d4cd3cd087d410deccd8f55234466d6c317?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/31350ceeecb1dd8986339a29bf040d4cd3cd087d410deccd8f55234466d6c317?s=96&d=mm&r=g\",\"caption\":\"Daniel Westermann\"},\"description\":\"Daniel Westermann is Principal Consultant and Technology Leader Open Infrastructure at dbi services. 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He has more than 15 years of experience in management, engineering and optimization of databases and infrastructures, especially on Oracle and PostgreSQL. Since the beginning of his career, he has specialized in Oracle Technologies and is Oracle Certified Professional 12c and Oracle Certified Expert RAC\/GridInfra. Over time, Daniel has become increasingly interested in open source technologies, becoming \u201cTechnology Leader Open Infrastructure\u201d and PostgreSQL expert. \u00a0Based on community or EnterpriseDB tools, he develops and installs complex high available solutions with PostgreSQL. He is also a certified PostgreSQL Plus 9.0 Professional and a Postgres Advanced Server 9.4 Professional. He is a regular speaker at PostgreSQL conferences in Switzerland and Europe. Today Daniel is also supporting our customers on AWS services such as AWS RDS, database migrations into the cloud, EC2 and automated infrastructure management with AWS SSM (System Manager). He is a certified AWS Solutions Architect Professional. Prior to dbi services, Daniel was Management System Engineer at LC SYSTEMS-Engineering AG in Basel. Before that, he worked as Oracle Developper &amp;\u00a0Project Manager at Delta Energy Solutions AG in Basel (today Powel AG). Daniel holds a diploma in Business Informatics (DHBW, Germany). His branch-related experience mainly covers the pharma industry, the financial sector, energy, lottery and telecommunications.","sameAs":["https:\/\/x.com\/westermanndanie"],"url":"https:\/\/www.dbi-services.com\/blog\/author\/daniel-westermann\/"}]}},"_links":{"self":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/5193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/comments?post=5193"}],"version-history":[{"count":0,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/5193\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/media?parent=5193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/categories?post=5193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/tags?post=5193"},{"taxonomy":"type","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/type_dbi?post=5193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}