Our indices are mostly time-based (e.g. date; year and week number; or year and month number), so the values of the keys are known and logical. We don't have any need for partial selection.
I know the example is in the documentation, but haven't had any call to use it.
Original Message:
Sent: 06-15-2023 05:09
From: Tedmund Hurlbut
Subject: Working with indexes and SELECTINDEXV
Brian,
Thank you for the example. They really help.
Have you used the code in the example for "Alternate Key Indices" dealing with Partial Key Look-up?
"Partial Key Look-up
Sometimes it is useful to allow a user to type in a text item and, as each character is entered, display a list of items that start with as much as has been typed. The following code shows the principles behind a subroutine that provides this functionality."
https://docs.rocketsoftware.com/bundle/openqm_ref_4/page/tru1652705885705.html
This might be something I will try in the future. This has been missing from our old code that users are looking for.
Ted
------------------------------
Tedmund Hurlbut
Self Registered
Simpsonville SC US
Original Message:
Sent: 06-14-2023 15:38
From: Brian Speirs
Subject: Working with indexes and SELECTINDEXV
Hi Ted,
There is a sample class routine for walking indexes in the QMSYS BP file named 'index.cls'. Of course, you have to use object syntax to use that class which takes a while to get used to. But even if you don't use this class, then reading the code will help you understand how to use the indices in OpenQM.
Cheers,
Brian
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Brian Speirs
Senior Analyst - Information Systems
Self Registered
Wellington NZ
Original Message:
Sent: 06-13-2023 08:49
From: Tedmund Hurlbut
Subject: Working with indexes and SELECTINDEXV
Angel,
Thanks. This sure helped. I did it without the loop since if I had a hit, all I wanted was the MEMBERS ID. No abort!
PROGRAM TEST.SELECTINDEXV
OPEN "MEMBERS" TO MF ELSE CRT "CANNOT OPEN MEMBERS"; STOP
SELECTINDEXV 6,"999-999-9999" FROM MF TO MEMBER.ID
CRT MEMBER.ID
READLIST MYLIST FROM MEMBER.ID
CRT "MYLIST '":MYLIST:"'"
IF MYLIST="" THEN
CRT "NO VALUE"
END
END
:RUN BP TEST-INDEX2
00500
MYLIST '00500'
:
------------------------------
Tedmund Hurlbut
Self Registered
Simpsonville SC US
Original Message:
Sent: 06-13-2023 07:32
From: Angel Rivas
Subject: Working with indexes and SELECTINDEXV
MEMBER.ID is an array of members.
Your program must be this way:
PROGRAM TEST.SELECTINDEXV
OPEN "MEMBERS" TO MF ELSE CRT "CANNOT OPEN MEMBERS"; STOP
SELECTINDEXV 6,"999-999-9999" FROM MF TO MEMBER.ID
LOOP
READNEXT ID FROM MEMBER.ID THEN
...do something
CRT ID
END ELSE
EXIT
END
REPEAT
STOP
END
or this way:
PROGRAM TEST.SELECTINDEXV
OPEN "MEMBERS" TO MF ELSE CRT "CANNOT OPEN MEMBERS"; STOP
SELECTINDEXV 6,"999-999-9999" FROM MF TO MEMBER.ID
READLIST MYLIST FROM MEMBER.ID
CCO=DCOUNT(MYLIST,@AM)
FOR I=1 TO CCO
...do something
CRT MYLIST<I>
NEXT I
STOP
END
HTH
------------------------------
Angel Rivas
Kosday
Original Message:
Sent: 06-13-2023 06:27
From: Tedmund Hurlbut
Subject: Working with indexes and SELECTINDEXV
I am learning how index work in OpenQM. But, my program is aborting when I try to address the "list.var"
SELECTINDEXV index.name {, value} FROM file.var TO list.var
Here is my test program:
PROGRAM TEST.SELECTINDEXV
OPEN "MEMBERS" TO MF ELSE CRT "CANNOT OPEN MEMBERS"; STOP
SELECTINDEXV 6,"999-999-9999" FROM MF TO MEMBER.ID
CRT MEMBER.ID
IF MEMBER.ID="" THEN
CRT "NO VALUE"
END
END
Here my results with the abort. MEMBER.ID is the correct ID.
:RUN BP TEST-INDEX2
00500
00000121: Value not found where required at line 5 of /usr/qmsys/TEST/BP.OUT/TEST-INDEX2
:
------------------------------
Tedmund Hurlbut
Self Registered
Simpsonville SC US
------------------------------