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Comment by 1over137 | Hacker News Reader

I'm stuck on MySQL because converting to postgres is hard, the tool everyone recommends (pgloader) doesn't work with current MySQL (https://github.com/dimitri/pgloader/issues/782), anyone know another way?

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How big of a DB are we talking about? You might need to recreate the whole DB schema / structure manually from scratch in PostgreSQL and then dump the data and load it in PG via standard SQL file exports in the correct table order to avoid failures due to FK constraints. This is a gross oversimplification but you get the gist

In fact I don't get the gist :) but thanks for your reply. All I know about databases is following instructions to set one up as part of a LAMP/FAMP installation.

Unless you use stored procedures in MySQL, recreating the tables and schemas in Postgres should be straightforward. Postgres now offers a 'MySQL Adapter', a.k.a. Foreign Data Wrapper (https://github.com/EnterpriseDB/mysql_fdw), that makes it straightforward to load data from MySQL into Postgres.

I know you mentioned that all you know about databases is following instructions, but maybe the folks at EDB or Percona can give you a hand.

Postgres will be around for a long time, and I think it's pretty obvious that MySQL won't.

I'll read up on that, thanks!

Prepare to be replaced by ai

haha. I have lots of other valuable skills. There's more to programming & IT than just db administration you know.

What happens if there are cycles of FK constraints between rows?

It does work, I just used pgloader to migrate a 16 GB database from MySQL 8.4 to PostgreSQL 18 last week (around 700 tables). It's not big, but their problems seem to be with authentication, not database size or functionality.

Have you tried it doing it yourself?

I have tried. It fails in authentication like that ticket describes, so I seem to be stuck on square one.

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