Re: How to html-decode a html-encoded field

On 2012-04-10, JORGE MALDONADO <jorgemal1960@gmail.com> wrote:
> --000e0ce0d2ee43edb104bd553408
> Content-Type: text/plain; charset=ISO-8859-1
>
> I have a table with a varchar field, such a field is HTML ENCODED. So, for
> example, the string "PLAIN WHITE T'S" is saved as "PLAIN WHITE
> T''S" (double quotes are not part of the string, I use them for
> clarity only). I need to perform a SELECT statement on this table and get
> the values HTML DECODED and I wonder if there is a function that I can
> include in such a statement for this purpose, for example "SELECT
> htmldecode(fld1) FROM table1". I will appreciate anu comments about my
> issue.

if you don't mind gettin an exception or the wrong answer on invalid 
input you can abuse xpath thusly:

with sample as ( values ('magic'),('s&witch'),('toaster')) 
select  column1 as input , (xpath('/z/text()', ('<z>'|| column1 ||'</z>')::xml))[1] as output 
from sample     
-- 
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