Generate SQL with variable length fields from CA 2E

Generate SQL with variable length fields from
CA 2E
Eamonn Foley
Sessions B(2e Track)
FOR INFORMATION PURPOSES ONLY
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Abstract
Eamonn Foley
The Warranty Group, Senior Programmer/Analyst
This presentation shows how to setup 2e to generate SQL with
variable length fields (VARCHAR and VARGRAPH) based fields that
didn’t require developers to add any additional code. This
facilitates using external tools(WebQuery) or external systems
that are not familiar with the ‘O’ open data type.
3
Copyright © 2013 CA. All rights reserved.
Agenda
 Business Background
 Parsing the source code
– SQL
– RPGLE
 Coding
– New field types
– Challenges interfacing with RPG
 Q/A
Business Background
 Project – International Application Supporting Native
Languages
– Needed to support interfaces with native Iseries and Windows
applications
 Interface was handled via external files for each application
 Needed to support double-byte character sets (ex. Chinese)
– Needed to support external reporting tools (IBM WebQuery)
Business Background
cont.
 Design Challenges
– Custom native code required to support each interface
– Limited support for external reporting
 Required to convert back to SQL tables to report
 Epiphany
– 2e Chicago Conference
– Crispen Bates DDS to DDL Presentation
– 2e Pre and Post Compiler exit program
– RPGLE will generate the code correctly (mostly)
– Most important, it wouldn’t require us to maintain custom user source
Parsing the Source Code
SQL
 Getting Started
– Retrieve 2e field details (Field Name, Type, Size)
Parsing the Source Code
SQL cont.
Parsing the Source Code
SQL cont.
Parsing the Source Code
SQL cont.
Parsing the Source Code
SQL cont.
Parsing the Source Code
SQL cont.
Parsing the Source Code
RPGLE
 Requires RPGLE
 Replace MOVEL expression
– EVAL expression
 Need to track numeric fields
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Parsing the Source Code
RPGLE cont.
Coding
Defining the fields
 Variable Character Fields
– Create New Data Type VCH
– Looks and acts like a standard text field.
– Field is defined to be 2 bytes larger then the maximum size.
 Variable Graphic Fields
– Uses the existing IGC field.
– Field is sized and acts the same as the IGC field.
Coding
Challenges
 Calling from other programs
– Variable character and Text are not the same data types.
 Displaying on a screen
– Like IGC, variable character has extra byte.
– To display fields properly, both client access and job CCSID have to be
correct for the data
Summary
 Variable length fields (character and graphic)
 Use of 2e pre/post compiler
 No user source for developers
Q&A
Sample Slides
Title – Title Case, Calibri 26 pt Bold
2 Line Max
Highlighted text if needed – sentence case
 Bullet 1, Calibri regular 24 pt – sentence case
– Sub-bullet, Calibri regular 20 pt – sentence case
 Sub-sub-Bullet, Calibri regular 18 pt
Title – Title Case, Calibri 26 pt Bold
Subtitle – sentence case, Calibri 20 pt bold
Highlighted text if needed – sentence case
 Bullet 1, Calibri regular 24 pt – sentence case
– Sub-bullet, Calibri regular 20 pt – sentence case
 Sub-sub-Bullet, Calibri regular 18 pt
Title – Title Case, Calibri 26 pt Bold
2 Line Max
 Bullet 1, Calibri regular 24 pt - sentence case
– Sub-bullet, Calibri regular 20 pt – sentence case
 Sub-sub-Bullet, Calibri regular 18 pt
HIGH LEVEL TOPIC / SUBJECT - UPPER CASE, CALIBRI 20 PT BOLD
Subtitle – sentence case, Calibri 20 pt bold
 Bullet 1, Calibri regular 24 pt – sentence case
– Sub-bullet, Calibri regular 20 pt – sentence case
 Sub-sub-Bullet, Calibri regular 18 pt
Sample Table Slide
Lorem ipsum
Lorem ipsum
Lorem ipsum
Lorem ipsum
Lorem ipsum
– Magna consectet at
lor ipsustie
modolore coreriu
scilit vel utatueros
nulla feugait
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lor ipsustie
modolore coreriu
scilit vel utatueros
nulla feugait
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lor ipsustie
modolore coreriu
scilit vel utatueros
nulla feugait
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lor ipsustie
modolore coreriu
scilit vel utatueros
nulla feugait
– Magna consectet at
lor ipsustie
modolore coreriu
scilit vel utatueros
nulla feugait
– Magna consectet at
lor ipsustie
modolore
– Magna consectet at
lor ipsustie
modolore coreriu
scilit
– Magna consectet at
lor ipsustie
modolore coreriu
scilit
Lorem ipsum
Lorem ipsum
Lorem ipsum
Lorem ipsum
Lorem ipsum
SAMPLE BAR CHART SLIDE
Series 3
20
0
Category 1
Category 2
Category 3
Category 4
Above average
10
10
Average
6
15
12
29
32
12
5
6
Below average
23
12
Item 1
Use the footnote layout if you need to source.
Item 2
Item 3
Item 4
Recommended Slides
SAMPLE PIE CHART
2013