On 2010-12-13 13.24, Henrique de Lima Trindade wrote:
Hi Peter,
Your example works perfectly. But, I need Your help with on another situation.
We're trying to create a plpgsql function with the expression. But, I'm getting a syntax error:
-----------------
create or replace function sp_remove_small_words( ptext text ) returns text immutable as
$$
begin
return regexp_replace( ptext, $$\y\w{1,3}\y$$, '', 'g' );
end;
$$ language plpgsql
;
-----------------
ERRO: erro de sintaxe em ou prÃximo a "\"
LINE 6: return regexp_replace( ptext, $$\y\w{1,3}\y$$, '', 'g' );
You're ending the function declaration with the $$. Using $fun$ as For
example, the following works:
create or replace function sp_remove_small_words( ptext text ) returns
text immutable as
$fun$
begin
return regexp_replace( ptext,
$$\y\w{1,3}\y$$, '', 'g' ); end;
$fun$
language plpgsql;
For details on dollar quoting see:
http://www.postgresql.org/docs/current/interactive/sql-syntax-lexical.html#SQL-SYNTAX-DOLLAR-QUOTING
Regards,
roppert
^
********** Error **********
ERRO: erro de sintaxe em ou prÃximo a "\"
SQL state: 42601
Character: 138
Thanks again!
-----Mensagem original-----
De: Peter Eisentraut [mailto:peter_e@xxxxxxx]
Enviada em: sexta-feira, 10 de dezembro de 2010 20:59
Para: Henrique de Lima Trindade
Cc: pgsql-general@xxxxxxxxxxxxxx
Assunto: Re: Using regexp_replace to remove small words
On fre, 2010-12-10 at 10:47 -0200, Henrique de Lima Trindade wrote:
I'm trying to find a regular expression that removes all small (length< N)
words from a string. But, until now I've not been successful.
Here is a start:
select regexp_replace('Tommy Lee Jones', $$\y\w{2,3}\y$$, ' ', 'g' );
If you want to normalize the spaces after the removal and handle
beginning and end of the word, you will need to expand this to cover
those cases, but the example should contain the key ingredients.
--
Regards,
Robert "roppert" GravsjÃ
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