Transcript document

DEV-16: ABL Database Objects Updated
David Olson
Director, Enterprise Solutions
Mary Szekely
Just Mary
Agenda
 ProDataSets in perspective
 What’s new for DB objects in 10.1C
 Getting more out of your DB objects
2
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
ProDataSets in Perspective
ProDataSets are about data relations between tables.
 The data relation Order to Order-Lines can be
represented as composite rows or “tuples”:
• Order 3 01/02/07 Order-line 1 95
• Order 3 01/02/07 Order-line 2 44
 The same data relation can be represented in
nested fashion as:
• Order 3 01/02/07
– Order-line 1 95
– Order-line 2 44
3
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
ProDataSets in Perspective
The “tuple” form of data: The Result Set
4
Order-num
Ordered
Cust-num
Cust-name
Line-num
Qty
Item-num
Item-name
Price
3
01/02/07
66
First Down Football
1
95
45
Golf Shoes
81.00
3
01/02/07
66
First Down Football
2
44
54
Shin Pads
4.86
3
01/02/07
66
First Down Football
3
71
4
Cycle Helmet
75.00
3
01/02/07
66
First Down Football
4
90
30
Windbreaker
42.75
3
01/02/07
66
First Down Football
5
98
2
Tennis Racquet
64.50
3
01/02/07
66
First Down Football
6
67
32
Tennis Shorts
19.99
4
02/15/07
83
Fallen Arch Running
1
78
2
Tennis Racquet
64.50
4
02/15/07
83
Fallen Arch Running
2
38
30
Windbreaker
42.75
4
02/15/07
83
Fallen Arch Running
3
4
43
Frisbee
13.97
4
02/15/07
83
Fallen Arch Running
4
72
40
Ice Skates
61.00
4
02/15/07
83
Fallen Arch Running
5
21
8
Runner’s Vest
9.85
4
02/15/07
83
Fallen Arch Running
6
97
53
Swimming Trunks
8.77
4
02/15/07
83
Fallen Arch Running
7
78
19
Ski Wax - Red
2.75
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
The Trouble with Result Sets
Distributing data: SQL “tuples” versus datasets
 Wide SQL tuple has extra copies of higher levels
• Each row is independent of all other data
• Updating can be difficult
• Ideal for streaming large amounts of data
where processing cannot wait for a completed
set
5
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
ProDataSets in Perspective
Typical XML format of the same data. Foreign keys deduced
by context, still with some redundancy.
<?xml version="1.0" ?>
- <OrderDataSet xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <ttOrder>
<CustNum>66</CustNum>
<OrderNum>3</OrderNum>
<OrderDate>1997-09-23</OrderDate>
</ttOrder>
- <ttOrder>
<CustNum>83</CustNum>
<OrderNum>4</OrderNum>
<OrderDate>1998-01-17</OrderDate>
</ttOrder>
- <ttCust>
<CustNum>66</CustNum>
<NAME>First Down Football</NAME>
</ttCust>
- <ttCust>
<CustNum>83</CustNum>
<NAME>Fallen Arch Running</NAME>
</ttCust>
- <ttOrderLine>
<OrderNum>3</OrderNum>
<LineNum>1</LineNum>
<ItemNum>45</ItemNum>
<Qty>95</Qty>
</ttOrderLine>
6
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
ProDataSets in Perspective
Normalized data: The Business View of Data
CUSTOMER
ORDER
Cust-num
Cust-name
66
First Down Football
83
Fallen Arch Running etc.
Cust-num
Order-num
Ordered
66
3
01/02/07
83
4
02/15/07
ORDER-LINE
7
Order-num
Item-num
Line-num
Qty
3
45
1
95
3
54
2
44
3
4
3
71
3
30
4
90
3
2
5
98
3
32
6
67
4
2
1
78
4
30
2
38
4
43
3
4
4
40
4
72
4
8
5
21
4
53
6
97
4
19
7
78
DEV-16: ABL Database Objects Updated
ITEM
Item-num
Item-name
Price
4
Tennis Racket
64.50
2
Cycle Helmet
75.00
8
Runner’s Vest
9.85
19
Duffel Bag
50.00
30
Windbreaker
42.75
32
Tennis Shorts
19.99
40
Ice Skates
61.00
43
Frisbee
13.97
45
Golf Shoes
81.00
53
Swimming Trunks
8.77
54
Shin Pads
4.86
© 2007 Progress Software Corporation
DataSets are Fun
Distributing data: SQL “tuples” versus datasets
 Dataset format has no extra copies
• One row in a table is dependent on rows in
other tables, so no processing can occur until
the entire set has been read
• Ideal for caching moderate amounts of data
• Ideal for loosely-coupled operations
• Updating is safe and easy– Browsing easy
8
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
DataSet Principles
ProDataSets, ABL SDOs, Java™ SDOs, .NET™ Datasets
9

Deliver related data as tables of logical records, not as tuples in
a matrix

Guarantee updating can be safe and effective, including before
images for optimistic locking

Minimize data transmission

Can be transformed to and from XML easily

Do not assume all data comes from one data source

May be defined dynamically
DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Agenda
 ProDataSets in perspective
 What’s new for DB objects in 10.1C
 Getting more out of your DB objects
10 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Under Development


D I S C L A I M E R
This talk includes information about potential
future products and/or product enhancements.
What we are going to say reflects our current
thinking, but the information contained herein is
preliminary and subject to change. Any future
products we ultimately deliver may be materially
different from what is described here.
D
I
11 DEV-16: ABL Database Objects Updated
S
C
L
A
I
M
E
R
© 2007 Progress Software Corporation
Adventures in Buffer Methods
Ability to create dataset Before-Table records on the Server
side for uniform update with SAVE-ROW-CHANGES
 Buffer handle method MARK-ROW-STATE
Allows you to create a before-table record for any
after-table record with a row-state and before-table
buffer of your choice
 Buffer handle method MARK-NEW
Allows you to create before-table records and
mark them as ROW-CREATED for an entire temptable
Useful for WebSpeed and data coming from XML
12 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Recursive Relationships
PARTS
part-num
part-location
mcost
66
London
12.95
83
Hong Kong
22.50
46
Billerica
15.25
21
Santa Cruz
46
Nashua
41.95
25
Springfield
16.75
19
Newark
143.88
4.95
part-num to assy-num
comp-num to part-num
PRODUCT-STRUCTURE
13 DEV-16: ABL Database Objects Updated
comp-num
assy-num
qty
66
3
2
83
4
5
46
8
15
21
2
3
46
5
19
25
12
9
19
7
2
© 2007 Progress Software Corporation
Dataset Recursion
FILL a Dataset through a Recursive Relation
RECURSIVE property for DATA-RELATIONS – manufacturing example
DEFINE TEMP-TABLE ttpart FIELD part-num AS CHAR
FIELD mcost AS DECIMAL
INDEX part-num AS UNIQUE part-num.
DEFINE TEMP-TABLE ttps
FIELD comp-num AS CHAR
FIELD assy-num AS CHAR
FIELD qty AS INT
INDEX ixcomp AS UNIQUE comp-num assy-num.
INDEX ixassy AS UNIQUE assy-num comp-num.
DEFINE DATASET mfg FOR ttpart, ttps
DATA-RELATION FOR ttpart, ttps
RELATION-FIELDS(part-num, assy-num)
DATA-RELATION FOR ttps, ttpart
RELATION-FIELDS(comp-num, part-num) RECURSIVE.
14 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Recursive Relationships
Single Table Recursion
Niel
David
Ken
Peter
Mary
Martha
The Trouble
with
Management
Evan
Robert
Alex
15 DEV-16: ABL Database Objects Updated
Robin
Rich
© 2007 Progress Software Corporation
Recursive Relationships
Single Table Recursion
EMPLOYEE
emp-name
manager
Niel
David
Niel
Ken
Niel
Peter
Niel
Martha
Peter
Evan
Martha
Robin
Evan
Rich
Evan
Mary
Ken
Alex
Robert
Robert
Martha
The Trouble with Management
• Managers are employees
• Navigation through self-recursion
can be difficult
Niel
David
Ken
Peter
Mary
Martha
Evan
Robert
Relationship tables: EMPLOYEE and EMPLOYEE
Relationship fields: emp-name and manager
16 DEV-16: ABL Database Objects Updated
Alex
Robin
Rich
© 2007 Progress Software Corporation
Dataset Recursion
FILL a Dataset through a Recursive Relation
RECURSIVE property for DATA-RELATIONS
Single Table model
DEFINE TEMP-TABLE ttemp FIELD emp-name AS CHAR
FIELD manager AS CHAR
FIELD age as int
INDEX emp-name AS UNIQUE emp-name.
DEFINE DATASET myorg FOR ttemp
DATA-RELATION r1 FOR ttemp,ttemp
RELATION-FIELDS(emp-name, manager)RECURSIVE.
17 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Working with Groups in Queries
BREAK BY, LAST-OF FIRST-OF for a QUERY
DEFINE QUERY q FOR Customer,Order, Order-line, Item
SCROLLING.
OPEN QUERY q FOR EACH Customer WHERE Customer.Custnum < 10,
EACH Order OF Customer,
EACH Order-line OF Order,
EACH Item OF Order-line
BREAK BY Customer.Sales-rep BY Order.Order-num.
REPEAT:
GET NEXT q.
IF QUERY q:LAST-OF(2) THEN …. Done with this
order
IF QUERY q:LAST-OF(1) THEN … Done with this
sales-rep
etc etc.
END.
Works for both dynamic and
static QUERY OPEN
18 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Working with Groups in Queries
Accumulating Totals
REPEAT:
GET NEXT q.
IF QUERY-OFF-END(“q”) THEN LEAVE.
tot-by-order = tot-by-order + qty * price.
tot-by-rep
= tot-by-rep
+ qty * price.
IF QUERY q:LAST-OF(2) THEN /*Done with this order*/
DO:
DISPLAY cust.sales-rep order.order-num tot-by-order.
tot-by-order = 0.
IF QUERY q:LAST-OF(1) THEN /*Done with this sales-rep*/
DO:
DISPLAY tot-by-rep.
tot-by-rep = 0.
END.
END.
END.
19 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Handy features in DB objects
ProDataSet and Temp-table READ and WRITE XML & Schema

TEMP-TABLE and DATASET WRITE-XML,
WRITE-XMLSCHEMA

TEMP-TABLE and DATASET READ-XML,
READ-XMLSCHEMA
• If receiving table or dataset is dynamic, we
can
infer the schema!
 Around since 10.1A but not talked about
enough!
20 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
DB Object Enhancements
Other new features…
 ProDataSets for consuming Web Services
ProDataSets can be a parameter for the web
service incoming call
Already available for Temp-Tables
Dataset parameters used to be done by
serializing to XML
21 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
DB Object Enhancements
Other new features…
 NOT-ACTIVE keyword for DATA-RELATION
def temp-table ttcust like customer.
def temp-table ttord like order.
def dataset dset for ttcust,ttord
data-relation r1 for ttcust,ttord
relation-fields(cust-num,cust-num)
data-relation r2 for ttord,ttcust
relation-fields(cust-num,cust-num) not-active.
dataset dset:get-relation("r1"):active = false.
dataset dset:get-relation("r2"):active = true.
Note that ttcust, ttorder is suitable for FILL
ttord, ttcust, is suitable for NAVIGATION or sending to .NET
22 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
DB Object Enhancements
Other new features…
 TOP-NAV-QUERY for datasets
dataset d:top-nav-query:set-callback-procedure
("off-end“ ,"fetchcusts").
browse b:query = dataset d:top-nav-query.
READ/WRITE attribute for dataset members that
are not children of any relation:
23 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
DB Object Enhancements
Other new features…
 DEFAULT-VALUE for BUFFER-FIELDS
Similar to INITIAL and DEFAULT–STRING, but is
in the NATIVE format, not CHARACTER.
For assigning values to a newly created record,
but not for use as MetaData since TODAY and
NOW are captured as the current internal native
datatype date and time
24 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Agenda
 ProDataSets in perspective
 What’s new for DB objects in 10.1C
 Getting more out of your DB objects
25 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Handy features in db objects
Filtering a ProDataset FILL query with FILL-WHERE-STRING
FILL-WHERE-STRING is BOTH read/write
and easier to use than creating your own
query
DATA-SOURCE dord-line:FILL-WHERE-STRING =
DATA-SOURCE dord-line:FILL-WHERE-STRING +
“ AND Line-Num < 3”.
Or
DATA-SOURCE dsDept:FILL-WHERE-STRING = “where deptcode = ‘400’”.
The query is automatically handled by the
FILL and you do not have to worry about
creating/deleting it yourself
26 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Handy features in db objects
Loose-copy-mode dataset and temp-table copy
 If loose-copy-mode is TRUE:
• The target and source member tables do not
have to have columns matching by position.
• They are matched by name, or by any
previous ATTACH-DATA-SOURCE mapping
between the target and source.
target-dataset-handle:COPY-DATASET( src-dataset-handle [,
append-mode [, replace-mode [, loose-copy-mode [, pairs-list
[, current-only ]
] ] ] ] )
27 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Handy features in DB objects
ProDataSet and Temp-table READ and WRITE XML & Schema

TEMP-TABLE and DATASET WRITE-XML,
WRITE-XMLSCHEMA

TEMP-TABLE and DATASET READ-XML,
READ-XMLSCHEMA
• If receiving table or dataset is dynamic, we
can
infer the schema!
 Around since 10.1A but not talked about
enough!
28 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
In Summary


ProDataSets model REAL
business data
• Complex relationships and
recursion are easily managed
New features make ProDataSets
more flexible
• FILL-WHERE and loosemode are
examples

ProDataSets keep getting better
• We can do things other datasets
cannot
29 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
For More Information, go to…

PSDN Library - http://www.psdn.com/library/index.jspa
• 10.1B ProDataSets by John Sadd
• 10.1B ABL Handbook by John Sadd

Education Courses:
• Using ProDataSets

Documentation:
• 10.1B ABL Reference
30 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Relevant Exchange Sessions

DEV-5: Using ProDataSets in OpenEdge® 10
• Monday, June 12, 2:00pm

DEV-14: Using ProDataSets and WebClient for Robust
B2B Applications
• Tuesday, June 13, 8:00am

DEV-13: Development Tools and ABL Roadmap Info
Exchange
• Tuesday, June 13, 8:00am
31 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Questions?
32 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
Thank you for
your time
33 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation
34 DEV-16: ABL Database Objects Updated
© 2007 Progress Software Corporation