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Re: Dynamic collation support

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2016-01-19 16:07 GMT+01:00 Merlin Moncure <mmoncure@xxxxxxxxx>:
For database functions, is there any way to manage collations besides
dynamic sql?  It doesn't look like there is but I thought I'd ask.

For example, I want to do something like:

DO
$$
DECLARE
  c name DEFAULT 'en_GB';
BEGIN
  SELECT * FROM foo ORDER BY a COLLATE c;
END;
$$;

and not

DO
$$
DECLARE
  c name DEFAULT 'en_GB';
BEGIN
  EXECUTE 'SELECT * FROM foo ORDER BY a COLLATE ' || quote_ident(c);
END;
$$;

I understand this would disable all index supported sorting; that's ok.

Not being able to specify collation in a parameterized manner presents
some issues...I'm curious if there are workarounds.

Different collates requires different plans - so using dynamic SQL is much more correct.

It is same like using variables as columns or tablenames.

Regards

Pavel
 

merlin


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