{"id":2271,"date":"2026-03-18T16:27:20","date_gmt":"2026-03-18T13:27:20","guid":{"rendered":"https:\/\/aristov.tech\/blog\/?p=2271"},"modified":"2026-03-27T10:23:13","modified_gmt":"2026-03-27T07:23:13","slug":"polimorfizm-funkczij","status":"publish","type":"post","link":"https:\/\/aristov.tech\/blog\/polimorfizm-funkczij\/","title":{"rendered":"\u041f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u0438\u0437\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0439"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u0421\u0442\u0430\u0442\u044c\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430&nbsp;\u0441\u0435\u043c\u043d\u0430\u0434\u0446\u0430\u0442\u043e\u043c&nbsp;<a href=\"https:\/\/youtu.be\/OMIjyBKE7O4\">\u0432\u0438\u0434\u0435\u043e<\/a>&nbsp;\u0438\u0437 31 \u0442\u0435\u043c\u044b \u043a\u0443\u0440\u0441\u0430 SQL 2.0 \u2014&nbsp;<a href=\"https:\/\/aristov.tech\/blog\/sql-vs-pl-pgsql\/\">PL\/pgSQL \u0432 PostgreSQL<\/a>&nbsp;\u043e\u0442 \u0410\u0440\u0438\u0441\u0442\u043e\u0432\u0430 \u0415\u0432\u0433\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435\u043c \u043a\u0443\u0440\u0441\u0430&nbsp;<a href=\"https:\/\/aristov.tech\/blog\/kurs-sql-c-0\/\">SQL c 0<\/a>. \u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0432\u0438\u0434\u0435\u043e \u043d\u0430 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u0445&nbsp;<a href=\"https:\/\/rutube.ru\/video\/a0d336a37af13027f04059c984ea483f\/\">RUTUBE<\/a>&nbsp;\u0438&nbsp;<a href=\"https:\/\/vkvideo.ru\/video-212716752_456239133\">VK video<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0442\u0441\u044f \u043f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u043d\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u043f\u0440\u0438 \u0438\u0445 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412&nbsp;<a href=\"https:\/\/aristov.tech\/blog\/peregruzka-funkczij\/\">\u043f\u0440\u043e\u0448\u043b\u043e\u0439<\/a> \u0441\u0442\u0430\u0442\u044c\u0435&nbsp;\u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438, \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u043e\u0442\u043b\u0430\u0434\u043a\u0438 \u0438 \u0432\u044b\u0431\u043e\u0440\u0430.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u0440\u0435\u0437\u0435\u043d\u0442\u0430\u0446\u0438\u044f \u0438 \u0438\u0441\u0445\u043e\u0434\u043d\u0438\u043a\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043f\u043e&nbsp;<a href=\"https:\/\/github.com\/aeuge\/aristov_tech\/tree\/main\/01%20SQL_PGSQL\">\u0441\u0441\u044b\u043b\u043a\u0435<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>\u041f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u0438\u0437\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0439<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u0438\u0437\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0432 PostgreSQL \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0433\u0443\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u0441 \u0440\u0430\u0437\u043d\u044b\u043c\u0438 \u0442\u0438\u043f\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445. \u042d\u0442\u043e \u0431\u043e\u043b\u0435\u0435 \u0433\u0438\u0431\u043a\u0438\u0439 \u043f\u043e\u0434\u0445\u043e\u0434 \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0437\u043a\u043e\u0439, \u043f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u043e\u0434\u043d\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u043c\u043e\u0436\u0435\u0442 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u043d\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>anyelement &#8212; \u043b\u044e\u0431\u043e\u0439 \u0442\u0438\u043f \u0434\u0430\u043d\u043d\u044b\u0445<\/li>\n\n\n\n<li>anyarray &#8212; \u043b\u044e\u0431\u043e\u0439 \u043c\u0430\u0441\u0441\u0438\u0432<\/li>\n\n\n\n<li>anynonarray &#8212; \u043b\u044e\u0431\u043e\u0439 \u043d\u0435-\u043c\u0430\u0441\u0441\u0438\u0432\u043d\u044b\u0439 \u0442\u0438\u043f<\/li>\n\n\n\n<li>anyenum &#8212; \u043b\u044e\u0431\u043e\u0439 enum \u0442\u0438\u043f<\/li>\n\n\n\n<li>anyrange &#8212; \u043b\u044e\u0431\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u043d\u044b\u0439 \u0442\u0438\u043f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE FUNCTION maximum(a anyelement, b anyelement) RETURNS anyelement AS $$\nSELECT CASE WHEN a &gt; b THEN a ELSE b END;\n$$ LANGUAGE SQL;\nSELECT maximum(1,2);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0413\u043b\u0430\u0432\u043d\u043e\u0435, \u0447\u0442\u043e\u0431\u044b \u043d\u0430\u0434 \u0442\u0430\u043a\u0438\u043c \u0442\u0438\u043f\u043e\u0432 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0438 \u0432\u044b\u0437\u043e\u0432\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u043b \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440 (&lt;&gt;= \u0438 \u0442.\u0434.)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435: \u043d\u0435\u043b\u044c\u0437\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c anyelement \u0432 RETURNS TABLE:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041d\u0415 \u0420\u0410\u0411\u041e\u0422\u0410\u0415\u0422:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE OR REPLACE FUNCTION get_polymorphic_table()\nRETURNS TABLE(id anyelement, name text) AS $$ ... $$;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0420\u0415\u0428\u0415\u041d\u0418\u0415:<\/strong> \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c OUT \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b &#8212; \u043d\u043e \u043f\u043e\u043c\u043d\u0438\u043c \u0440\u0430\u0437\u043d\u0438\u0446\u0443:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE OR REPLACE FUNCTION get_polymorphic_data(in i anyelement, OUT id anyelement, OUT data jsonb)\nRETURNS SETOF record AS $$ \u2013 \u0432\u043e\u0437\u0432\u0440\u0430\u0442 \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0433\u043e \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0430<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u0434\u043e\u043b\u0436\u0435\u043d \u0431\u044b\u0442\u044c \u0437\u0430\u0434\u0430\u043d 1 IN \u044d\u043d\u0438\u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041c\u043e\u0449\u043d\u044b\u0439 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u0434\u043b\u044f:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0421\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0445 \u0443\u0442\u0438\u043b\u0438\u0442<\/li>\n\n\n\n<li>\u0423\u043c\u0435\u043d\u044c\u0448\u0435\u043d\u0438\u044f \u0434\u0443\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043a\u043e\u0434\u0430<\/li>\n\n\n\n<li>\u041f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u0433\u0438\u0431\u043a\u043e\u0441\u0442\u0438 API<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043f\u0440\u0435\u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u0430:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u041e\u0434\u043d\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u043c\u043d\u043e\u0433\u0438\u0445 \u0442\u0438\u043f\u043e\u0432<\/li>\n\n\n\n<li>\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u0442\u0438\u043f\u043e\u0432<\/li>\n\n\n\n<li>\u0421\u043e\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u0439<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0421\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0442\u043b\u0430\u0434\u043a\u0438<\/li>\n\n\n\n<li>\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043a\u043e\u043d\u0442\u0435\u043a\u0441\u0442\u0430\u0445<\/li>\n\n\n\n<li>\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u044e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041f\u0440\u0438\u043c\u0435\u0440 \u043a\u043e\u0434\u0430:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE OR REPLACE FUNCTION get_type_info(value anyelement)\nRETURNS TABLE(type_name text, type_oid oid) AS $$\nBEGIN\n    SELECT \n        pg_typeof(value)::text,\n        pg_typeof(value)::oid\n    INTO type_name, type_oid;\n    \n    RETURN NEXT;\nEND;\n$$ LANGUAGE plpgsql;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0411\u043e\u043b\u044c\u0448\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u043e\u0432 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e&nbsp;<a href=\"https:\/\/github.com\/aeuge\/aristov_tech\/tree\/main\/01%20SQL_PGSQL\">\u043d\u0430 \u0433\u0438\u0442\u0445\u0430\u0431\u0435<\/a> \u0438 \u0432 <a href=\"https:\/\/youtu.be\/OMIjyBKE7O4\">\u0432\u0438\u0434\u0435\u043e<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412\u00a0<a href=\"https:\/\/aristov.tech\/blog\/proczedury\/\">\u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0439 <\/a>\u0441\u0442\u0430\u0442\u044c\u0435\u00a0\u043c\u044b \u0440\u0430\u0437\u0431\u0435\u0440\u0451\u043c \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u044b.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0421\u0442\u0430\u0442\u044c\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430&nbsp;\u0441\u0435\u043c\u043d\u0430\u0434\u0446\u0430\u0442\u043e\u043c&nbsp;\u0432\u0438\u0434\u0435\u043e&nbsp;\u0438\u0437 31 \u0442\u0435\u043c\u044b \u043a\u0443\u0440\u0441\u0430 SQL 2.0 \u2014&nbsp;PL\/pgSQL \u0432 PostgreSQL&nbsp;\u043e\u0442 \u0410\u0440\u0438\u0441\u0442\u043e\u0432\u0430 \u0415\u0432\u0433\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435\u043c \u043a\u0443\u0440\u0441\u0430&nbsp;SQL c 0. \u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0432\u0438\u0434\u0435\u043e \u043d\u0430 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u0445&nbsp;RUTUBE&nbsp;\u0438&nbsp;VK video. \u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0442\u0441\u044f \u043f\u043e\u043b\u0438\u043c\u043e\u0440\u0444\u043d\u044b\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u043f\u0440\u0438 \u0438\u0445 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438. \u0412&nbsp;\u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435&nbsp;\u0440\u0430\u0437\u0431\u0438\u0440\u0430\u044e\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, 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