Re: Index creation question for expression (col1 || '-' || - Mailing list pgsql-sql

>On Fri, Jul 08, 2005 at 12:08:41PM -0400, Ying Lu wrote:
>  
>
>>CREATE INDEX idx_t1 ON test (col1 || '-' || col2);
>>
>>May I know is it possible and how I may create index for the expression 
>>such as "col1 || '-' || col2" for a table please?
>>    
>>
>
>
>"The syntax of the CREATE INDEX command normally requires writing
>parentheses around index expressions, as shown in the second
>example...."
>
>That second example is exactly what you're trying to do:
>
>CREATE INDEX people_names ON people ((first_name || ' ' || last_name));
>  
>

This is exactly what I want. I missed a pair of "()" :( . That is why I 
got an error.

Thank you very much.

- Emi