Sqlite to Postgresql conversion: method and process


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 which allows features such as transactions, sub selects, and user defined types.

  • Scalability and reliability
  • Low-cost and open-sourced

Unlike most DBMS, has a similar syntax for BOOLEAN type

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 required solutions are;

  1. Using CSV format to migrate SQLite date

Firstly, export theĀ  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.

  1. Although there is limited number of quick and easy software solutions for SQLite to PostgresSQL migration process, there are low budget and highly accurate types too. This programme, developed by intelligent converters, is notably easy to carry out with a mouse click. Intelligent Converters, a software programme company has created one of the simplest converters for migration from SQLite to PostgreSQL. The limitless functionalities 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