Can you explain the process of transferring data from mysql to postgresql smoothly and efficiently? I recently discovered this tool https://github.com/ahammond/mysql2pgsql/blob/master/mysql2pgsql.pl, which seems to be suitable for the task.
However, I encountered an issue with BOOLEAN fields in mysql, where they are represented as simple 0/1 values in the dump. Unfortunately, postgresql does not accept integers as boolean values, causing compatibility problems.

Transferring data from MySQL to PostgreSQL can be done smoothly and efficiently by following a few steps. While the tool you mentioned, mysql2pgsql.pl, can be helpful, it might not handle the BOOLEAN field conversion issue you mentioned. Here's a general process you can follow:

1. Dump MySQL Data: Use the mysqldump command-line tool or any other tool of your choice to export the MySQL database data as a dump file. Make sure to include the table schema and data in the dump.

2. Convert Data Types: Before importing the data into PostgreSQL, you need to convert the BOOLEAN values from 0/1 to true/false. You can achieve this by using a scripting language like Python, Perl, or even shell scripting. Iterate over the dump file, identify BOOLEAN fields, and replace the 0/1 values with true/false.

3. Create PostgreSQL Database: Create an empty target PostgreSQL database where you will import the converted data.

4. Import Data: Use the pg_dump command-line tool or any other tool of your choice to import the modified dump file into the PostgreSQL database. This tool will take care of recreating tables, schemas, and data in PostgreSQL.

5. Verify Data: After the import is complete, verify the data in the PostgreSQL database to ensure everything has been successfully transferred and that the BOOLEAN values are now represented correctly.

 Here are a few more details that can help you with the data transfer process:

1. Use Database Migration Tools: Instead of manually converting data types and handling the transfer process, you can consider using database migration tools specifically designed to handle the conversion between different database systems. Tools like Flyway, Liquibase, or AWS Database Migration Service can automate the migration process and handle data type conversions, including BOOLEAN fields.

2. Verify Data Compatibility: Before initiating the transfer, ensure that the schema and data in MySQL are compatible with PostgreSQL. Check for any differences in data types, constraints, indexes, and reserved keywords between the two databases. This will help identify potential issues beforehand and allow you to make necessary adjustments or transformations.

3. Consider Schema Mapping: If the MySQL schema doesn't match the PostgreSQL schema, you may need to map the tables and columns accordingly. Establishing a mapping will ensure that the data is transferred to the correct corresponding tables and columns in PostgreSQL.

4. Handle NULL Values: Take note of how NULL values are represented in your MySQL dump. Ensure that these NULL values are correctly interpreted and transferred to the PostgreSQL database during the import process.

5. Test and Validate: Before deploying the transferred data into production, thoroughly test and validate the data in the PostgreSQL database. Check for consistency, accuracy, data integrity, and verify that all relationships and dependencies are intact.

I also found another good one: https://github.com/maxlapshin/mysql2postgres. However, in my opinion, taps is the most enjoyable method.

These two links provide information and resources for converting from other databases, such as MySQL, to PostgreSQL. The first link is a wiki page on the official PostgreSQL website that offers guidance on the conversion process. The second link is a GitHub repository that contains a tool called "FromMySqlToPostgreSql" which assists in migrating database schemas and data from MySQL to PostgreSQL.

https://wiki.postgresql.org/wiki/Converting_from_other_Databases_to_PostgreSQL
https://github.com/AnatolyUss/FromMySqlToPostgreSql