Very imp testing

what does it mean by regression testing.

Hi,
Regression testing means rerunning test cases from existing test suites to build confidence that software changes have no unintended side-effects. The u201Cidealu201D process would be to create an extensive test suite and run it after each and every change. Unfortunately, for many projects this is just impossible because test suites are too large, because changes come in too fast, because humans are in the testing loop, because scarce, highly in-demand simulation laboratories are needed, or because testing must be done on many different hardware and OS platforms.
Researchers have tried to make regression testing more effective and efficient by developing regression test selection (RTS) techniques, but many problem remain, such as:
Unpredictable performance. RTS techniques sometimes save time and money, but they sometimes select most or all of the original test cases. Thus, developers using RTS techniques can find themselves worse off for having done so.
Incompatible process assumptions. Testing time is often limited (e.g., must be done overnight). RTS techniques do not consider such constraints and, therefore, can and do select more test cases than can be run.
Inappropriate evaluation models. RTS techniques try to maximize average regression testing performance rather than optimize aggregate performance over many testing sessions. However, companies that test frequently might accept less effective, but cheaper individual testing sessions if the system would, nonetheless, be well-tested over some short period of time.
Some strategies and factors to consider during this process include the following:
Test fixed bugs promptly. The programmer might have handled the symptoms but not have gotten to the underlying cause.
Watch for side effects of fixes. The bug itself might be fixed but the fix might create other bugs.
Write a regression test for each bug fixed.
If two or more tests are similar, determine which is less effective and get rid of it.
Identify tests that the program consistently passes and archive them.
Focus on functional issues, not those related to design.
Make changes (small and large) to data and find any resulting corruption.
Trace the effects of the changes on program memory.
Also see http://en.wikipedia.org/wiki/Regression_testing
Thanks & Regards,
raju

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Very very imp question plz......reply atleast one step

<b>plz tell me the statements which will be burdon for the databaSe</b>..and to over come tha which statements we should use...fro example INSTEAD OF INNER JOINS WE USE FOR ALL ENTRIES TO UTILIZE DATABASE MUCH MORE EFFECIENTLY PLZ REPLY MY QUESTION WITH GREAT HEART THANK U

Hi,
Performance tuning for Data Selection Statement
For all entries
The for all entries creates a where clause, where all the entries in the driver table are combined with OR. If the number of
entries in the driver table is larger than rsdb/max_blocking_factor, several similar SQL statements are executed to limit the
length of the WHERE clause.
The plus
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     Mixing processing and reading of data
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The Minus
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     Memory could be critical (use FREE or PACKAGE size)
Some steps that might make FOR ALL ENTRIES more efficient:
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     Sorting the driver table
If possible, convert the data in the driver table to ranges so a BETWEEN statement is used instead of and OR statement:
FOR ALL ENTRIES IN i_tab
WHERE mykey >= i_tab-low and
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Nested selects
The plus:
     Small amount of data
     Mixing processing and reading of data
     Easy to code - and understand
The minus:
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     Performance killer no. 1
Select using JOINS
The plus
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     Not so memory critical
The minus
     Very difficult to program/understand
     Mixing processing and reading of data not possible
Use the selection criteria
SELECT * FROM SBOOK.
CHECK: SBOOK-CARRID = 'LH' AND
                  SBOOK-CONNID = '0400'.
ENDSELECT.
SELECT * FROM SBOOK
WHERE CARRID = 'LH' AND
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ENDSELECT.
Use the aggregated functions
C4A = '000'.
SELECT * FROM T100
WHERE SPRSL = 'D' AND
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CHECK: T100-MSGNR > C4A.
C4A = T100-MSGNR.
ENDSELECT.
SELECT MAX( MSGNR ) FROM T100 INTO C4A
WHERE SPRSL = 'D' AND
       ARBGB = '00'.
Select with view
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
SELECT SINGLE * FROM DD01T
    WHERE   DOMNAME    = DD01L-DOMNAME
        AND AS4LOCAL   = 'A'
        AND AS4VERS    = DD01L-AS4VERS
        AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
SELECT * FROM DD01V
WHERE DOMNAME LIKE 'CHAR%'
       AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
Select with index support
SELECT * FROM T100
WHERE     ARBGB = '00'
       AND MSGNR = '999'.
ENDSELECT.
SELECT * FROM T002.
SELECT * FROM T100
    WHERE     SPRSL = T002-SPRAS
          AND ARBGB = '00'
          AND MSGNR = '999'.
ENDSELECT.
ENDSELECT.
Select Into table
REFRESH X006.
SELECT * FROM T006 INTO X006.
APPEND X006.
ENDSELECT
SELECT * FROM T006 INTO TABLE X006.
Select with selection list
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
ENDSELECT
SELECT DOMNAME FROM DD01L
INTO DD01L-DOMNAME
WHERE DOMNAME LIKE 'CHAR%'
       AND AS4LOCAL = 'A'.
ENDSELECT
Key access to multiple lines
LOOP AT TAB.
CHECK TAB-K = KVAL.
ENDLOOP.
LOOP AT TAB WHERE K = KVAL.
ENDLOOP.
Copying internal tables
REFRESH TAB_DEST.
LOOP AT TAB_SRC INTO TAB_DEST.
APPEND TAB_DEST.
ENDLOOP.
TAB_DEST[] = TAB_SRC[].
Modifying a set of lines
LOOP AT TAB.
IF TAB-FLAG IS INITIAL.
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MODIFY TAB.
ENDLOOP.
TAB-FLAG = 'X'.
MODIFY TAB TRANSPORTING FLAG
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Deleting a sequence of lines
DO 101 TIMES.
DELETE TAB_DEST INDEX 450.
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DELETE TAB_DEST FROM 450 TO 550.
Linear search vs. binary
READ TABLE TAB WITH KEY K = 'X'.
READ TABLE TAB WITH KEY K = 'X' BINARY SEARCH.
Comparison of internal tables
DESCRIBE TABLE: TAB1 LINES L1,
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IF L1 <> L2.
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ELSE.
TAB_DIFFERENT = SPACE.
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ENDIF.
IF TAB_DIFFERENT = SPACE.
ENDIF.
IF TAB1[] = TAB2[].
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Modify selected components
LOOP AT TAB.
TAB-DATE = SY-DATUM.
MODIFY TAB.
ENDLOOP.
WA-DATE = SY-DATUM.
LOOP AT TAB.
MODIFY TAB FROM WA TRANSPORTING DATE.
ENDLOOP.
Appending two internal tables
LOOP AT TAB_SRC.
APPEND TAB_SRC TO TAB_DEST.
ENDLOOP
APPEND LINES OF TAB_SRC TO TAB_DEST.
Deleting a set of lines
LOOP AT TAB_DEST WHERE K = KVAL.
DELETE TAB_DEST.
ENDLOOP
DELETE TAB_DEST WHERE K = KVAL.
Tools available in SAP to pin-point a performance problem
The runtime analysis (SE30)
SQL Trace (ST05)
Tips and Tricks tool
The performance database
Optimizing the load of the database
Using table buffering
Using buffered tables improves the performance considerably. Note that in some cases a stament can not be used with a buffered table, so when using these staments the buffer will be bypassed. These staments are:
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     Any WHERE clasuse that contains a subquery or IS NULL expression
     JOIN s
     A SELECT... FOR UPDATE
If you wnat to explicitly bypass the bufer, use the BYPASS BUFFER addition to the SELECT clause.
Use the ABAP SORT Clause Instead of ORDER BY
The ORDER BY clause is executed on the database server while the ABAP SORT statement is executed on the application server. The datbase server will usually be the bottleneck, so sometimes it is better to move thje sort from the datsbase server to the application server.
If you are not sorting by the primary key ( E.g. using the ORDER BY PRIMARY key statement) but are sorting by another key, it could be better to use the ABAP SORT stament to sort the data in an internal table. Note however that for very large result sets it might not be a feasible solution and you would want to let the datbase server sort it.
Avoid ther SELECT DISTINCT Statement
As with the ORDER BY clause it could be better to avoid using SELECT DISTINCT, if some of the fields are not part of an index. Instead use ABAP SORT + DELETE ADJACENT DUPLICATES on an internal table, to delete duplciate rows.
Regards,
Kumar.

Very imp MRP

HI EXPERTS,
1)iam creating a material with 4 mrp views and i selected automatic reorder point planning with fixed lot size proceedure .while saving the data iam getting a error message which says that i need to maintain forecasting data.so my question is why should i require to maintain forecasting data when iam creating a material with automatic reorderpoint palnning
please answer my queery
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it is understood that the stock is not held in inventory because of immediate consumption but why cant the cost is assigned
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regards meena

Hi,
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2. It depends on the material type you select for creation of materials.
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rgds
gsc

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Hi All,
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(SELECT Substr(MAX(Replace(Sys_connect_by_path(srd_emp_id, '/'),
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names
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sr_id,
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srd_emp_id ) row#
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sr_id
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OR a.sr_assign_dt < :P119_FROM_DT
AND a.sr_delivered_dt IS NULL )) b
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sr_id,
sr_clnt_id,
sr_desc,
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status
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hi experts could u [please expalin me the difference between
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thank u

Unit testing is done in bit and pieces. Like e.g. in SD standard order cycle; we do have 1-create order, then 2-delivery, then 3-transfer order, then 4-PGI and then 5-Invoice. So we will be testing 1,2,3,4 and 5 seperately alone one by one using test cases and test data. We will not be looking and checking/testing any integration between order and delivery; delivery and TO; TO and PGI and then invoice.
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Please can any body translate it to eng (it's very imp for investigation)

Hi, please can some body translate this to english,
      LENUM_KONSISTENZ_PRUEFEN
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if possible please tell me the the form ,'LENUM_KONSISTENZ_PRUEFEN', function, why it's used?

hi David,
please find translation of :
"Es wird geprüft ob bei lage inver walteten Lagertypen auch eine Lagereinheit in der TA-Position sitzt. Das kann nur passieren wenn der Userexit zur Lagereinheitenkonvertierung aktiv ist und dieser Userexit keine LE-Nummer zurückgibt"
To
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Its very dificult to tell the functionally of the form "LENUM_KONSISTENZ_PRUEFEN" after looking at the name....can you tellme the name of the program....
rewards Point.
Cheers,
Sagun Desai....

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OlsonBW,
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Very imp on purchase order

here is the scenario for my client.
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Hi,
U can find in ME2M report all the purchases for perticular vendor with there valuation.
OR
u can develop a query through SQVI.
wherein u can get the list of ALL PO aganst vendor with net value.from that u can easily identify the old PO valuation.
regards,
sujit

Very imp outline agreements.

hi experts,
1)in which type of outline agreement does the price updates in info record .
2)i created a quantity contract and created a pur order with reference to contract, now i want to see how much quantity is still left in the contract target quantity.
please advice me
regards

Hi,
Point wise answers as below:
1) For value contact and Scheduling agreements will update the info record but it depends upon the indicator you are setting in additional data of agreement.
2) Go to T.Code: ME33K and to item Over view and select line item> Item > Statistics > Release documentation (or Ctrl + Shift + F12)
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Regards.
Chinna

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regards
meena

1. SPRO>MM>Purchasing>Vendor Evaluation> Define Weighting Keys
2. SPRO>MM>Purchasing>Vendor Evaluation> Define Criteria
Price,
Quality,
Delivery,
Service
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Criteria Sub-Criteria
3. SPRO->MM->Purchasing>Vendor Evaluation>Define Scope List.
4. SPRO->MM->Purchasing>Vendor Evaluation> Maintain Purchasing Organization Data
5.Run ME61
Note: Follow the below links
http://www.sap-img.com/mm009.htm
http://help.sap.com/saphelp_470/helpdata/en/8d/b97db3414511d188fc0000e8322f96/frameset.htm
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/MMISVE/MMISVE.pdf

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