Web services:
>> It is becoming standard. DB2 and Oracle already have it. Also BEA Tuxedo
>> middleware. MSSQL and Sybase announced. Don't let Informix be an isolated
>> data island!
>
>It is becoming standard? Which standard?
Definitely not ANSI SQL standard. I see that all big RDBMS have it (or soon
will have).
It does not mean that because others have then Informix have to have it too.
But it means that at Informix should evaluate such a possibility.
And my personal view is that Informix should implement Web services somehow.
I see that it is useful : many database applications are currently using web
services.
So in case of evaluating "which database will be best for our new
application" this feature would be quite important.

>> DB2 also have interesting extension: you can use web service similar as
>> stored procedure.
>> In Informix it extends stored procedure implementation method. Currently
>> Informix have:
>> - SPL;
>> - J/SQL (Internet Foundation only);
>> - C databalades.
>> I want to add to this list:
>> - Web Services.
>Implement them as a DataBlade?
I do not know internals of IDS implementation. It seems that DataBlade would
be good for this.

>> ad 2.
>> For BYTE, TEXT, CLOB, and BLOB types there are no literals. Why? It just
>> complicates simple things.
>> For TEXT and CLOB it would be the same literal as for char(30000) column.
>> For BYTE and BLOB it have to be some hex literal.
>
>This *is* a huge PITA.
Not quite.
I do not want to introduce 2GB literals. Current limitation - 255 characters
is ok.
Suppose you have char_col1 as char(30000). Then I can update it in following
way:
"set char_col1=NULL", "set char_col1='' ", "set char_col1='N/A' ",
"set char_col1='NONE'", "set char_col1[1,2]='TX'"
Above is typical: large column often uses short literals.

With TEXT type I can't do this. So people implements their own workarounds.
Typical approach is: instead of using TEXT we have several varchar columns
and value is splitted between them.
This is useful with not extra large BLOBS only.

I just want to have such possibilities for TEXT and CLOB too.
And Informix already have some kind of BLOB literals. In ODBC TEXT value is
treated similarly as long varchar, which means that in ODBC BLOB literal can
be used. Unfortunately I had problems with my ODBC and I couldn't verify the
documentation.
So this is strange: ODBC connection have BLOB literals, native connection
does not.
Better is to have support on server side so stored procedures would use
literals too.

Literals for BYTE and BLOB: I don't have urgent need for this. Just for
completness it would be usefull to write in update:
"set byte_col1=#FFAA"


Robert Sosnowski


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