Ken,
KN> SQL vendors themselves saw a need to support complex data types.
There exist so principle: "I'm too".
Procedural languages have 'struct' (in C, or 'record' in Pascal).
SQL: "I'm too".
KN> IBM, Informix and Oracle moved from relational to object-relational technology.
Procedural languages have control constructions ('for, do, while, until') -
SQL: "I'm too". Of course, it's easy to sell, what people already know !
There was a fork: to enter procedural constructions, or to prolong
development of declarative programming (to not be unfounded, i'm trying
to do this in slides #48-49, 64, 71 of http://sql50.euro.ru/sql5.11.1.ppt ).
This coping had fatal consequence - SQL had required encapsulation
with inevitability. "I'm too".
KN> That migration from relational to object-relational set the stage for being able
KN> to support XML with an SQL DBMS.
You were wanting to say, that it's impossible to support XML outside
OO-programming ??
KN> The leading SQL platforms are like a Swiss Army Knife, with a blade for
KN> supporting XML, XPath
Reasonable.
KN> and XQuery.
SQL was come short :)
Dmitry Turin
HTML6 (6. 5.3) http://html60.euro.ru
SQL5 (5.11.1) http://sql50.euro.ru
Unicode7 (7. 2.1) http://unicode70.euro.ru
Computer2 (2. 0.2) http://computer20.euro.ru
