There are a lot of benefits to named parameters and users seem to like
them - it would be a shame to see them go.
How complex would a parser be? Wouldn't it just need to handle the
distinction between string values/comments etc. and SQL text? That
would be a lot simpler than parsing the actual SQL.
What does EJB3 do for native queries? Can we do something like that (or better)?
--
Jeremy
On 6/13/06, Kevin Williams <[EMAIL PROTECTED]> wrote:
DAS has a problem with its attempt to support named parameters in SQL as in:
command = Factory.createCommand ("select * from Customer where
Customer.id = :id")
command.setParm("id", 500);
We have been using a colon as the parameter marker and this works well
since we can do a simple scan of the select statement to find the named
parameter markers and replace them with '?'. Unfortunately, a scan is
not sufficient when the SQL uses colons as part of the statement itself,
like in an embedded timestamp. To pluck out the parameter markers in
these more complicated cases requires a parser and, IMO, the DAS has no
business parsing SQL.
So, what I propose is to remove support for named parameters altogether
and leave clients with indexed parameter access like this:
command = Factory.createCommand ("select * from Customer where
Customer.id = ?")
command.setParm(1, 500);
Any opinions?
Thanks,
--Kevin
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