Re: Increasing the length of a VARCHAR column without table rewrite

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Eric,

Is the table in question so large that you can't afford the time it would take to perform ALTER COLUMN TYPE?

I definitely would not go poking around in system catalogs and changing things there. Not unless you *want* to trash your database... The fact that 'todo' has not yet been implemented suggests that it is not a simple matter of changing one attribute in a system catalog.

Lewis


Eric Comeau wrote:
ALTER TABLE .... ALTER column TYPE varchar(xxx)

We need to increase the length of a varchar(256) column in two of our largest tables preferrably to TEXT.

Is there a way to do this without having to go through a complete table rewrite?

I have googled and seen the todo on the wiki, but I'm wondering if we are increasing the length of a varchar column can we manually modify the system catalogs to increase the length?

http://wiki.postgresql.org/wiki/Todo#ALTER


Version: PG 8.1.17

Thanks,
Eric




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