An example of a database engine that follows the SQL format is SQLite. It is winning the hearts of database administrators because of it’s simple design, efficiency, economy, and independence. This is why it is considered as a suitable local data storage. The drawback with this software is the incompatibility with server model or client support. In addition to that, enterprise data that is shared cannot be executed with the software.
Although it is quite a competitive software, the drawbacks are important as well. This is why companies are migrating to DBMSs such as PostgreSQL which are more effective and functional. Again, the migration process is a good method to eliminate the restrictions.
The benefits of PostgreSQL are more options in the sophisticated DBMS such as:
- Sub selects
- User-defined types
- Scalability and reliability
- Low-cost and open-sourced
Unlike most DBMS, SQLite and PostgreSQL have a similar syntax for BOOLEAN type that makes easy to migrate SQLite to PostgreSQL.Interestingly, the migration process is usually simple and straightforward. As found in other DBMS, migration should be difficult but the absence of stored procedures and nontrivial database objects in SQLite is a plus. But the migration and conversion task can be complicated during SQLite table conversions due to:
- BYTEA to BLOB change
- ‘Serial’ form of converted auto increment columns
- Conversion of datetime into timestamp
These complications require the automation of the process itself.The available solutions are explored below.
- Using CSV Format to Migrate SQLite to PostgreSQL
Firstly, export the source database into CSV. Then import it to PostgreSQL using suitable programme modules. There are specific statements that can achieve this. Specified table ‘customers’ table are stored as ‘data.csv’ file type.
Furthermore, a free pgloader is used to execute the migration process. But pgloader requires certain definition of operation details. For clarity, these operation details can be found on different websites online.
During the migration stage, the non-conversion of certain symbols may occur. This usually happens when such symbols (such as non-ANSI) are absent in the Unicode Code page. The original SQLite data may be simplified by the database administrator. This is done by the complete conversion of the characters into special scripts or symbols that can be recognized.
- Migrate SQLite to PostgreSQL via Special Software
Although there is limited number of quick and easy software solutions to migrate SQLite to PostgreSQL, there are low budget and highly accurate types too. One of such programs is SQLite to PostgreSQL converter developed by Intelligent Converters. Their tool to migrate SQLite to PostgreSQL is very easy to use and it can automate the migration within just a few click of button. The functionalities of SQLite to PostgreSQL converter include:
- Windows PostgreSQL servers and different versions of Linux/Unix are supported
- The table structure has options for its modification
- The option for the conversion of relationships and indexes between tables
- Profiles are made from stored conversion settings
- PostgreSQL database present in system is merged with SQLite data
- Synchronization of SQLite data and PostgreSQL database
- Multibyte character set is also supported
- PostgreSQL script files are export sites for SQLite database
- The option for command line support