How to make a proper migration from My. SQL to Postgre. SQLMigrations are always horrible. Convert Mysql To Postgresql linux software free downloads and reviews at WinSite. Free Linux Convert Mysql To Postgresql Shareware and Freeware. Doesn't matter from which system to which other system. About what you should take care when you think about migration by the example of migration from My. PostgreSQL-to-MySQL converter allows users to perform deferred conversion and get more control over the process.SQL to Postgre. SQL. There are different reasons why a user wants to migrate. Mostly for migrations from My. SQL to Postgre. SQL it is one of the following. Replication issues. Cluster issues. High availability issues. GPL). license (BSD instead of GPL). Check profitability First of all you should check if a migration really makes sense. You developed the game three or five years ago by using My. SQL. All worked fine at the beginning but today you have more then a million users and 4. You already optimised all what you can optimise at and for My. SQL but you still often have problems with the database server. You will have other problems then with My. Por favor, por falta de experi SQLines tool allows you to convert database schema (DDL), queries and DML statements, views, stored procedures, functions and triggers from MySQL to PostgreSQL. Postgres to MySQL is a program to migrate Postgres. PostgreSQL-to-MySQL converter allows users to perform deferred conversion and get more. Converter Postgres para SQL Server usando o Full Convert Enterprise. SQL but you will have problems too. A huge effort on optimisation is necessary for Postgre. SQL here too. This would mean you have to optimise your database for Postgre. SQL and you have to optimise your full source code for Postgre. SQL. This would cost you half of a year work until you will have an advantage by using Postgre. SQL. Usually such kinds of games have a life time from just a few years. Your game already reached the highest point in its life. It will be one of the top live online games maybe this year and maybe next year but not longer. So it just makes no sense to make such huge changes here. Just dumping the database and change the different SQL stuff from the system to Postgre. SQL related SQL and then import all into Postgre. SQL often isn't good enough. You will have the same problems as before or different problems which are not better than the old problems. When you wanted to migrate for performance reasons it also could happen that Postgre. SQL will have an inferior performance than My. SQL has had. I have never seen a migration that was faster than 3 months. Usually, you will need 3 months up to half a year until all will work proper and you will be lucky with the new system. Postgre. SQL has different advantages than My. SQL and you have to do different stuff when you want to get a benefit of the advantages. Let me show you some examples. At My. SQL you often have to use a bad db design to avoid joins and subqueries (because of bad performance here). Indexing is just implemented rudimentary. You need different storage engines for full text search and transaction handling. Trigger handling especially before trigger is ugly and buggy. Procedures and functions only possible in SQL. Not Null behaviour isn't familiar. Non DDL/DCL transactions. Non check constraints. Often you will find usage of the advantages of known My. SQL bugs. Joins and subqueries work fast. You can choose between several index algorithm and indexing works as expected. You also have a good performance on DDL indexing stuff. You only have one storage engine. You won't have problems with triggers, procedures/functions. Also you can write procedures/functions in almost every language. Not Null behaviour is familiar. You will have DDL/DCL transactions and check constraints and there are non known bugs at the moment for Postgre. SQL. You also can create rules when you need them as advantage. Unfortunately, with My. SQL sometimes you just have to put it into the application because of missing feature or other disadvantages. So when you want to have an advantage of a migration to Postgre. SQL you should use this features as well. What we call databases is the same as schema at Postgre. SQL. What Postgre. SQL is calling database is called an instance in My. SQL. Database is database and table is table they just don't have the schema level. Of course this has to be repaired when you want to have an advantage on Postgre. SQL. Neither timestamp nor datetime from My. SQL work in the same way as timestamp in Postgre. SQL. Also text/varchar/char is different. Looking to performance just consider, that you can't use indexes on data type text in My. SQL. You can use them in Postgre. SQL. Also you won't have different performance for text, varchar and char. Think about it independent from what already exist. Re- design the database and use the advantages from Postgre. SQL. Often migration isn't profitable and it is better to stay on My. SQL and just design the new/upcoming project with Postgre.
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