Re: Values larger than 1/3 of a buffer page cannot be indexed.

Hey Viktor,

2011/3/13 Viktor Nagy <viktor(dot)nagy(at)toolpart(dot)hu>

> hi,
>
> when trying to insert a long-long value, I get the following error:
>
> index row size 3120 exceeds maximum 2712 for index "ir_translation_ltns"
> HINT: Values larger than 1/3 of a buffer page cannot be indexed.
> Consider a function index of an MD5 hash of the value, or use full text
> indexing.
>
> is there a way to generate this recommended function index of an md5 hash
> on an already existing database and tables (filled with data)?
>
Just create index this way, e.g.
CREATE INDEX ir_translation_ltns ON tab ((md5(col)));
where "tab" and "col" are table and column of which you want
to create btree index.

>
> thanks,
> Viktor
>

--
// Dmitriy.