Re: How to declare cursor if tablename is a variable?

On Wed, Mar 21, 2007 at 02:20:21AM +0000, hu js wrote:
> But I get into another trouble.See following program.

As I requested before, please post questions to the mailing list
so others can participate in and learn from the discussion.

> "query_xypos" is ok. but "query_xydata" is not ok.
> I find "objectid" not quoted corrected.It seems relevant with variable
> varchar and "'".
[...]
> query_xypos text := 'SELECT mrc_xy_position FROM ' ||
> quote_ident(tablename);
> query_xydata text := 'SELECT x,y FROM ' || tablename || ' where
> mrc_xy_position = ' || quote_ident(objectid) ;

See the documentation to learn more about quote_ident() and
quote_literal() and when to use each:

http://www.postgresql.org/docs/8.2/interactive/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN
http://www.postgresql.org/docs/8.2/interactive/functions-string.html#FUNCTIONS-STRING-OTHER

--
Michael Fuhr