reboot rep

3 sem/Lab/Lab#6/test3.sql

@@ -0,0 +1,72 @@
+CREATE OR REPLACE FUNCTION rearrange_salaries() RETURNS VOID AS $$
+DECLARE
+    salaries RECORD;
+	small NUMERIC[];
+	larg NUMERIC[];
+	const CONSTANT INTEGER = 10;
+BEGIN
+    FOR salaries IN 
+        SELECT id, salary_in_euro
+        FROM bd6_employees 
+        ORDER BY salary_in_euro 
+        LIMIT const
+	LOOP
+		small = array_append(small, (SELECT salary_in_euro FROM bd6_employees WHERE id = salaries.id));
+    	DELETE FROM bd6_employees
+    	WHERE id = salaries.id;
+	END LOOP;
+
+    FOR salaries IN 
+        SELECT id, salary_in_euro
+        FROM bd6_employees 
+        ORDER BY salary_in_euro DESC 
+        LIMIT const
+	LOOP
+		larg = array_append(larg, (SELECT id FROM bd6_employees WHERE id = salaries.id));
+	END LOOP;
+	
+	FOR i IN 1..const
+	LOOP
+        UPDATE bd6_employees
+        SET salary_in_euro = salary_in_euro + small[i]
+        WHERE id = larg[i];
+    END LOOP;
+END;
+$$ LANGUAGE plpgsql;
+SELECT rearrange_salaries();
+
+
+
+
+CREATE OR REPLACE FUNCTION update_salaries() RETURNS VOID AS $$
+DECLARE
+    max_salary_employee_id INTEGER;
+    min_salaries numeric[];
+    max_salaries numeric[];
+    i INTEGER;
+    const CONSTANT INTEGER = 10;
+BEGIN
+    -- Получаем заработные платы последних 10 человек с самой маленькой заработной платой
+    SELECT array_agg(id) FROM bd6_employees
+    ORDER BY salary_in_euro ASC
+    LIMIT const INTO min_salaries;
+
+    -- Получаем заработные платы 10 первых человек с самой большой заработной платой
+    SELECT array_agg(id) FROM bd6_employees
+    ORDER BY salary_in_euro DESC
+    LIMIT const INTO max_salaries;
+
+    -- Добавляем заработные платы
+    FOR i IN 1..const LOOP
+        UPDATE bd6_employees
+        SET salary_in_euro = salary_in_euro + min_salaries[i]
+        WHERE id = max_salaries[i];
+    END LOOP;
+
+    -- Удаляем 10 человек с наименьшей заработной платой
+    DELETE FROM bd6_employees
+    WHERE id IN (SELECT unnest(min_salaries));
+
+    RAISE NOTICE 'Заработные платы обновлены и % человек удалены', const;
+END;
+$$ LANGUAGE plpgsql;