Re^2: DBI/MySQL/MariaDB clone tables across DB Connections


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by LanX (Saint)

on Apr 06, 2023 at 20:36 UTC ( [id://11151493]=note: print w/replies, xml )

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> I would go the route of dumping things to files and then importing from files,

I just had to go the execute_for_fetch route for yet another project, and it's surprisingly fast, thanks for that! :)

But ...

> since that allows better granularity in the sense that either a table is imported completely or not at all.

When dealing with MySQL or MariaDB this depends on the engine used, since I get an array of potential errors returned from execute_for_fetch ...

On InnoDB I can then decide to either ->commit or ->rollback and this works fine.

But on MyISAM transactions and rollbacks are not supported.

There I have to go the route of using intermediate temporary tables to be safe(r).

Cheers Rolf
_{(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :)

Wikisyntax for the Monastery}

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Re^3: DBI/MySQL/MariaDB clone tables across DB Connections by Bod (Parson) on Apr 06, 2023 at 21:44 UTC
But on `MyISAM` transactions and rollbacks are not supported They are also quite old and can be unstable. I never did find out why but I had some intermittent data loss from `MyISAM` so I am now using `Aria` tables instead, or `InnoDB` if I really need to enforce referrential integrity (which is rare). The only downside I have found with the `Aria` storage engine is that MySQL Workbench doesn't recognise them so can't generate forward engineered code. But that has the positive of improving my DDL familiarity which had got very rusty!	[reply] [d/l] [select]
Re^4: DBI/MySQL/MariaDB clone tables across DB Connections by LanX (Saint) on Apr 06, 2023 at 21:58 UTC
> They are also quite old and can be unstable. I'm not the one to decide how my client wants to footgun himself despite my warnings ... =) Cheers Rolf _{(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :) Wikisyntax for the Monastery}	[reply]

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