Re: HOw to convert unicode to string

On 2012-09-23, Abhijit Prusty -X (abprusty - UST Global at Cisco) <abprusty(at)cisco(dot)com> wrote:
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> Hi,
>
> I have a query in oracle like this mentioned below
>
> Insert into TEST
> (TEMPLATE_ID, TEMPLATE_NAME, CREATED_BY, CREATED_DT, UPDATED_BY,
> UPDATED_DT, TEMPLATE_KEY)
> Values
> (1, UNISTR('\D3C9\BA85\B3C4 \B514\C2A4\D50C\B808\C774'), 'dmin', SYSDATE=
> , 'admin',
> SYSDATE ,'FLOOR');
>
> Now the oracle uses the UNISTR function to convert and insert the Unicode to
> string and store in database.

oracle uNISTR-like UTF-16 can be written like this:

U&'\D3C9\BA85\B3C4 \B514\C2A4\D50C\B808\C774'

it's not a function, it a way of writing strings... if you need a
it probably wouldn't be hard to write.

but you can also write in UTF-8 (literal or escaped) or unicode escaped
see docs:

u&'\+021502' -- unicode
u&'\D845\DD02' -- utf16 (docs tell methis is legal with recent versions)
e'\xF0\xA1\x94\x82' -- utf8 hex escape
e'\360\241\224\202' -- utf8 octal escape
'𡔂' -- utf8 string literal

the first 2 can be intermixed as can the last three forms.

http://www.postgresql.org/docs/9.1/static/sql-syntax-lexical.html

select length('𡔂'), octet_length( '𡔂' ), length('test'),
octet_length('test');

length | octet_length | length | octet_length
--------+--------------+--------+--------------
1 | 4 | 4 | 4

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