1. PostgreSQL copy of all MySQL created and tested.\n 2. Purchase Orders and Sales Orders and stock level management added to MySQL, PostgreSQL, and server and front end code.

static/MySQL/920_edit_permissions.sql

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+SELECT URL.id_link,
+	URL.id_user,
+    U.name AS name,
+    URL.id_role,
+    R.name AS role
+FROM Shop_User_Role_Link URL
+INNER JOIN Shop_User U
+	ON URL.id_user = U.id_user
+INNER JOIN Shop_Role R
+	ON URL.id_role = R.id_role
+;
+SELECT *
+FROM Shop_Role_Permission_Link
+;
+SELECT *
+FROM Shop_Access_Level
+;
+SELECT *
+FROM Shop_Permission
+;
+SELECT *
+FROM Shop_Access_Level
+;
+
+
+select * from shop_user;
+select * from shop_user_audit;
+select * from Shop_User_Change_Set;
+/*
+INSERT INTO Shop_User_Change_Set ( comment )
+VALUES ('Demotion');
+*/
+UPDATE Shop_User
+SET is_super_user = 0,
+    id_change_set = (SELECT id_change_set FROM Shop_User_Change_Set LIMIT 1)
+WHERE id_user = 1
+;
+select * from shop_user;
+select * from shop_user_audit;
+
+
+drop procedure if exists p_test;
+delimiter //
+create procedure p_test ()
+begin
+	declare b0 int;
+	declare b1 int;
+    SET b0 = 0;
+    SET b1 = 1;
+    select b0, b1;
+	select cast(b0 as char), cast(b1 as char);
+	select cast(b0 as char character set utf8), cast(b1 as char character set utf8);
+	select convert(b0, char), convert(b1, char);
+	select convert(b0, char character set utf8), convert(b1, char character set utf8);
+	select convert(convert(b0, signed), char), convert(convert(b1, signed), char);
+	select convert(convert(b0, signed), char character set utf8), convert(convert(b1, signed), char character set utf8);
+end //
+delimiter ;
+call p_test();
+drop procedure if exists p_test;
+
+INSERT INTO Shop_User_Audit (
+	id_user,
+	name_field,
+	value_prev,
+	value_new,
+	id_change_set
+)
+SELECT id_user, name_field, value_prev, value_new, id_change_set
+FROM Shop_User_Audit
+WHERE id_audit = 1
+UNION
+SELECT id_user, name_field, value_prev, value_new, id_change_set
+FROM Shop_User_Audit
+WHERE id_audit = 1
+;
+
+select * from shop_user_audit;
+
+
+SELECT * FROM Shop_Access_Level;
+
+SELECT * FROM Shop_Product;