{"id":7989,"date":"2017-10-15T15:58:32","date_gmt":"2017-10-15T13:58:32","guid":{"rendered":"https:\/\/www.salvis.com\/blog\/?p=7989"},"modified":"2023-11-08T00:00:19","modified_gmt":"2023-11-07T23:00:19","slug":"entity-relationship-model-for-plscope","status":"publish","type":"post","link":"https:\/\/www.salvis.com\/blog\/2017\/10\/15\/entity-relationship-model-for-plscope\/","title":{"rendered":"Entity Relationship Model for PL\/Scope"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Today I found a sketch of an ERD from last year when I looked at the new features of PL\/Scope in version 12.2. It looked a bit complicated and also wrong. So, I decided to refactor it using SQL Developer Data Modeler and share the result.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope.png\"><img loading=\"lazy\" decoding=\"async\" width=\"761\" height=\"399\" src=\"https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope.png\" alt=\"\" class=\"wp-image-7994\" srcset=\"https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope.png 761w, https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope-300x157.png 300w, https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope-260x136.png 260w, https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope-50x26.png 50w, https:\/\/www.salvis.com\/blog\/wp-content\/uploads\/2017\/10\/plscope-143x75.png 143w\" sizes=\"auto, (max-width:767px) 480px, 761px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You find the model in the <a href=\"https:\/\/github.com\/PhilippSalvisberg\/plscope-utils\">plscope-utils<\/a> Github project <a href=\"https:\/\/github.com\/PhilippSalvisberg\/plscope-utils\/tree\/main\/database\/model\">here<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The implementation provides the following views:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>DBA\/ALL\/USER_IDENTIFIERS<\/code>for the entities &#8220;Identifier Declaration&#8221; and &#8220;DB Object Usage&#8221;<\/li>\n\n\n\n<li><code>DBA\/ALL\/USER_STATEMENTS<\/code>for the entities &#8220;Identifier Declaration&#8221;, &#8220;SQL Stmt Usage&#8221; and&nbsp; &#8220;SQL Statement&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For me the most interesting entity was the &#8220;Identifier Declaration&#8221;, because it helped me to understand the\u00a0<code>signature<\/code> attribute\/column. PL\/Scope creates a <code>signature<\/code> for every database object and all its components when a database object is compiled with PL\/Scope or when a referenced object cannot be compiled with PL\/Scope. I call those objects &#8220;Secondary Objects&#8221;. Such objects are tables, views, materialized views, operators or sequences. Hence you find PL\/Scope metadata for every table which is referenced in the PL\/SQL code after compiling it with PL\/Scope. Here&#8217;s an example:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#D4D4D4;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#2b2b2b;color:#c7c7c7\">PL\/Scope Metadata of Table EMP<\/span><span role=\"button\" tabindex=\"0\" data-code=\"SELECT usage, type, name, line, col, usage_id, usage_context_id \n  FROM user_identifiers\n WHERE object_type = 'TABLE'\n   AND object_name = 'EMP'\n ORDER BY line, col;\n\nUSAGE       TYPE   NAME     LINE  COL USAGE_ID USAGE_CONTEXT_ID\n----------- ------ -------- ---- ---- -------- ----------------\nDECLARATION TABLE  EMP         1   15        1                0\nDECLARATION COLUMN EMPNO       1   22        2                1\nDECLARATION COLUMN ENAME       1   51        3                1\nDECLARATION COLUMN JOB         1   77        4                1\nDECLARATION COLUMN MGR         1  100        5                1\nDECLARATION COLUMN HIREDATE    1  118        6                1\nDECLARATION COLUMN SAL         1  134        7                1\nDECLARATION COLUMN COMM        1  152        8                1\nDECLARATION COLUMN DEPTNO      1  171        9                1\" style=\"color:#D4D4D4;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki dark-plus\" style=\"background-color: #1E1E1E\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #569CD6\">SELECT<\/span><span style=\"color: #D4D4D4\"> usage, <\/span><span style=\"color: #569CD6\">type<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #569CD6\">name<\/span><span style=\"color: #D4D4D4\">, <\/span><span style=\"color: #569CD6\">line<\/span><span style=\"color: #D4D4D4\">, col, usage_id, usage_context_id <\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #569CD6\">FROM<\/span><span style=\"color: #D4D4D4\"> user_identifiers<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #569CD6\">WHERE<\/span><span style=\"color: #D4D4D4\"> object_type = <\/span><span style=\"color: #CE9178\">&#39;TABLE&#39;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #569CD6\">AND<\/span><span style=\"color: #D4D4D4\"> object_name = <\/span><span style=\"color: #CE9178\">&#39;EMP&#39;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #569CD6\">ORDER BY<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #569CD6\">line<\/span><span style=\"color: #D4D4D4\">, col;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">USAGE       <\/span><span style=\"color: #569CD6\">TYPE<\/span><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #569CD6\">NAME<\/span><span style=\"color: #D4D4D4\">     <\/span><span style=\"color: #569CD6\">LINE<\/span><span style=\"color: #D4D4D4\">  COL USAGE_ID USAGE_CONTEXT_ID<\/span><\/span>\n<span class=\"line\"><span style=\"color: #6A9955\">----------- ------ -------- ---- ---- -------- ----------------<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION <\/span><span style=\"color: #569CD6\">TABLE<\/span><span style=\"color: #D4D4D4\">  EMP         <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #B5CEA8\">15<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">0<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN EMPNO       <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #B5CEA8\">22<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">2<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN ENAME       <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #B5CEA8\">51<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">3<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN JOB         <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">   <\/span><span style=\"color: #B5CEA8\">77<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">4<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN MGR         <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #B5CEA8\">100<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">5<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN HIREDATE    <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #B5CEA8\">118<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">6<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN SAL         <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #B5CEA8\">134<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">7<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN COMM        <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #B5CEA8\">152<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">8<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">DECLARATION COLUMN DEPTNO      <\/span><span style=\"color: #B5CEA8\">1<\/span><span style=\"color: #D4D4D4\">  <\/span><span style=\"color: #B5CEA8\">171<\/span><span style=\"color: #D4D4D4\">        <\/span><span style=\"color: #B5CEA8\">9<\/span><span style=\"color: #D4D4D4\">                <\/span><span style=\"color: #B5CEA8\">1<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The PL\/Scope metadata for the table emp\u00a0will be removed automatically when they are not used by &#8220;Primary Objects&#8221; (objects which can be compiled with PL\/Scope) anymore. Quite nice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Today I found a sketch of an ERD from last year when I looked at the new features of PL\/Scope in version 12.2. It looked a bit complicated and also wrong. So, I decided to refactor it using SQL Developer Data Modeler and share the result. You find the model in the<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":7994,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[86,97,13,85],"class_list":["post-7989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oracle","tag-code-analysis","tag-plscope","tag-plsql","tag-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Entity Relationship Model for PL\/Scope - Philipp Salvisberg&#039;s 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.salvis.com\/blog\/2017\/10\/15\/entity-relationship-model-for-plscope\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Entity Relationship Model for PL\/Scope - Philipp Salvisberg&#039;s Blog\" \/>\n<meta property=\"og:description\" content=\"Today I found a sketch of an ERD from last year when I looked at the new features of PL\/Scope in version 12.2. 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