Question

I am attempting to move a stored procedure from Microsoft SQL Server 2000 to Informix 11. The original SP contains a final select statement with a GROUP BY statement that includes a converted datetime:

group by convert(varchar(8), c.startDateTime, 1)

When I convert this to Informix syntax I get a syntax error at run time:

GROUP BY (c.startDateTime::DATETIME YEAR TO DAY)::VARCHAR(10)

Can anyone please point me to how, if possible, this can be done in Informix? If this is not possible, which I suspect, how would you typically handle this in the overall query?

Answer 1

I think you need to convert from this:

SELECT a, b, c 

FROM  ...

GROUP BY (c.startDateTime::DATETIME YEAR TO DAY)::VARCHAR(10) ;

to something like:

SELECT a, b, c, 
    (c.startDateTime::DATETIME YEAR TO DAY)::VARCHAR(10) AS d

FROM  ...

GROUP BY 4 ;        --- meaning: the 4th column in the SELECT clause