| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 801.1 | As my costomer told me last week: NO! | SUOSW3::KAISER | ULTRIX/SQ...what?? | Mon Nov 19 1990 08:18 | 0 |
| 801.2 | Wrong, SQL for Adabas does exist! | SUOSW3::KAISER | ULTRIX/SQ...what?? | Mon Nov 19 1990 10:10 | 9 |
| About half an hour ago I talked with another customer and asked him to verify
my answer in the previous reply. But he told me that Software AG has now a
SQL interface for ADABAS. Now I asked someone who was a former employee of
Software AG, and she gave me the same answer. SQL for Adabas does exist on
VMS for nearly two years now!
Sorry for the first answer,
-Hans
|
| 801.3 | No problem for our SQL access! | ZPOVC::TEOHEN | | Mon Nov 19 1990 10:21 | 4 |
| Thanks for the positive answer! This means that we can interface and
access ADABAS data via our SQL services, right?
Thtan
|
| 801.4 | not quite ! | WOTVAX::BRYAN | io,io its off to disk we go | Mon Nov 19 1990 11:42 | 11 |
|
> Thanks for the positive answer! This means that we can interface and
> access ADABAS data via our SQL services, right?
No, absolutely wrong.
SQL/Services provides access to a RDB/VMS only. Maybe one day all the
db vendors will get together and support a common sql interface, a
common network protocol and a common set of db access routines in a
common library, which would provide the sort of functionallity your
looking for, maybe one day. Don't hold your breath though.
|
| 801.5 | Correction | BROKE::HIGGS | SQL is a camel in disguise | Mon Nov 19 1990 16:27 | 34 |
|
> Thanks for the positive answer! This means that we can interface and
> access ADABAS data via our SQL services, right?
No, absolutely wrong.
SQL/Services provides access to a RDB/VMS only.
SQL/Services provides access to DSRI-based databases that support VAX SQL.
This includes Rdb/VMS, and the various RdbAccess products that allow access
(via a VMS system with a SQL/Services server on it) to DB2, Oracle, and now
RMS and IBM files (or datasets or whatever strange terminology those guys use).
Maybe one day all the
db vendors will get together and support a common sql interface, a
common network protocol and a common set of db access routines in a
common library, which would provide the sort of functionallity your
looking for, maybe one day. Don't hold your breath though.
The effort is called the SQL Access Group, and Digital is very much involved
with it, and it's being worked on. Who knows? They might surprise you. It
may be that it will become available before you expect.
Incidentally, it won't require all vendors to implement a common set of access
routines to access their databases; they will have to support a SQL Access
server that understands the SQL Access protocol on top of DECnet and/or TCP/IP,
and translates the requests into whatever magic incantation is necessary to
access their databases. Presumably, a standard *client* interface would be
likely, however.
Note that we have to rely on the appropriate vendors to implement a SQL Access
server that understands the protocol. Some vendors will be ahead of others in
supporting SQL Access, of course.
|
| 801.6 | anticipating the next question | BROKE::ASHELL::WATSON | less accumulated depreciation | Tue Nov 20 1990 17:02 | 3 |
| And yes, Software AG are on SQL Access.
Andrew.
|
| 801.7 | ADASQL from Software AG | NOT003::DENTI | Ian Dent @NOT, Nottingham, UK | Mon Dec 10 1990 12:36 | 13 |
| The SQL product from Software AG is called ADASQL and consists of
a precompiler for Fortran, Cobol and PL/I only.
The SQL syntax is a "super-sub-set of ANSI SQL".
The precompiler generates "direct calls" in the source program which
can then be modified or compiled.
Direct calls are the standard access method to an Adabas database
and consist of setting up a series of buffers and then making a
call to the Adabas routine.
Ian Dent
|
| 801.8 | super-sub-set ? | TRCA03::MCMULLEN | Ken McMullen | Mon Dec 10 1990 14:43 | 5 |
| Ian,
What do you mean by "super-sub-set of ANSI SQL"?
Ken
|
| 801.9 | ADASQL features | NOT003::DENTI | Ian Dent @NOT, Nottingham, UK | Tue Dec 11 1990 14:37 | 37 |
| It appears to be a marketing term to cover up the fact that it does
not meet the standard!
To quote Software AG, "ADASQL is a subset of the ANSI SQL enlarged
by specific functions to allow full use of the ADABAS facilities".
Things missing include:
UNION
AVG, COUNT, UNIQUE, SUM
error handling on conditions (instead there is a central error handling
routine).
EXISTS
no null-value support
LIKE
INSERT syntax is different
ALL, DISTINCT on SELECT
Additions are:
specification of access path on SEARCH
support of periodic groups and multiple fields (arrays, repeating
groups)
support of SUPER(compound), SUB(partial) and phonetic keys
Access by ISN (db-key)
reading and writing of data on END of TRANSACTION
encryption
password protection on tables
dealing with ISN lists
Details of files used by ADASQL must be stored in PREDICT data
dictionary. A pre-requisite of PREDICT is NATURAL.
To summarise, "super-sub-set of standard" means "not meeting standard".
Ian
|
| 801.10 | NATURAL for Rdb | BROKE::THOMAS | | Fri Dec 14 1990 23:14 | 2 |
| Also, NATURAL for Rdb has an interoperability component that
allows access to IBM ADABAS.
|