Quelle  mpa004.cob   Sprache: Cobol

       IDENTIFICATION DIVISION.
       PROGRAM-ID.  MPA004.
       ENVIRONMENT DIVISION.
       CONFIGURATION SECTION.
       SOURCE-COMPUTER.  xyz.
       OBJECT-COMPUTER.  xyz.
       DATA DIVISION.
       WORKING-STORAGE SECTION.



      * EMBEDDED COBOL (file "MPA004.PCO")  

      ****************************************************************
      *                                                              
      *                 COMMENT SECTION                              
      *                                                              
      * DATE 1989/10/07 EMBEDDED COBOL LANGUAGE                          
      * NIST SQL VALIDATION TEST SUITE V6.0                          
      *  DISCLAIMER:                                                  
      *  This program was written by employees of NIST to test SQL    
      *  implementations for conformance to the SQL standards.        
      *  NIST assumes no responsibility for any party's use of        
      *  this program.
      *                                                              
      * MPA004.PCO                                                    
      * WRITTEN BY: SUN DAJUN                                        
      *                                                              
      * THIS PROGRAM IS PART A OF A TWO-PART PROGRAM(A & B) THAT     
      * TESTS THE CONCURRENCY OF SQL                                 
      *                                                              
      * REFERENCES                                                   
      *       AMERICAN NATIONAL STANDARD database language - SQL     
      *                         X3.135-1989                          
      *                                                              
      *          SECTION  4.16 Transactions                          
      *                   Paragraph Two                              
      ****************************************************************




           EXEC SQL BEGIN DECLARE SECTION END-EXEC
       01  who1 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  who2 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  knum PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  rslt1 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  rslt2 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  test1 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  test2 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  uid PIC  X(18).
       01  uidx PIC  X(18).
             EXEC SQL END DECLARE SECTION END-EXEC
       01  SQLCODE PIC S9(9) COMP.
       01  errcnt PIC S9(9) DISPLAY SIGN LEADING SEPARATE.

      *date_time declaration 
       01  TO-DAY PIC 9(6).
       01  THE-TIME PIC 9(8).

       01  cnt PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  code1 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  times1 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  pauze PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  pauze2 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  pauze3 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  retrys PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  i PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  tranct PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  tx PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  txls19 PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  CXXL3T PIC S9(9) DISPLAY SIGN LEADING SEPARATE.

       01  SQL-COD PIC S9(9) DISPLAY SIGN LEADING SEPARATE.

       PROCEDURE DIVISION.
       P0.


             MOVE "SULLIVAN1" TO uid
             CALL "AUTHID" USING uid
             MOVE "not logged in, not" TO uidx
             EXEC SQL SELECT USER INTO :uidx FROM HU.ECCO END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (uid  NOT  =   uidx) then
               DISPLAY "ERROR: User ", uid " expected. User ", uidx "
      -    " connected"
             STOP RUN
             END-IF
             MOVE 0 TO errcnt
             DISPLAY 
           "SQL Test Suite, V6.0, Embedded COBOL, mpa004.pco"
             DISPLAY 
           "59-byte ID"
           DISPLAY "TEd Version #"

      *date_time print 
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME

      *concurrency tuning variables follow: 
             MOVE 1 TO pauze
             MOVE 300 TO pauze2
             MOVE 300 TO pauze3
             MOVE 13 TO retrys
             MOVE 50 TO tranct

             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

      ******************** BEGIN TEST0268 *******************

             DISPLAY " TEST0268 "
             DISPLAY " Reference X3.135-1989 Section 4.16 Transactions
      -    " "
             DISPLAY " Paragraph Two "
             DISPLAY " - - - - - - - - - - - - - - - - - - -"

             DISPLAY "*** This program is part A of a two-part
      -    " "
             DISPLAY "*** program (A & B) that tests deadlock management
      -    " "
             DISPLAY "*** in SQL. An implementation which rolls back "
             DISPLAY "*** without a negative SQLCODE will fail"

             DISPLAY " This is Program A which starts first and
      -    " waits.... "

           .
        P100.
      *                      -----Initialization----- 
             MOVE 0 TO code1
             EXEC SQL DELETE FROM MP4_NEXTKEY END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  <  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL DELETE FROM MP4_NN END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  <  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL DELETE FROM MP4_MM2 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  <  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL INSERT
               INTO MP4_NEXTKEY (KEYNUM,AUTHOR)
               VALUES (1,'A') END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL INSERT INTO MP4_NN
               VALUES ( 1) END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL INSERT INTO MP4_MM2
               VALUES ( 100) END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF

             if (code1  =  1) then
               DISPLAY "*****Error initializing tables ****"
               EXEC SQL ROLLBACK WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
               GO TO P100
             END-IF


             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               DISPLAY "*********Setup will not commit ********"
               EXEC SQL ROLLBACK WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
               GO TO P100
             END-IF

      *                      -----Synchronization----- 

             DISPLAY " PLEASE start program MPB004!!! "

           .
        P105.
      *pause a little 
      *increase value of variable pauze if MPB004 has trouble 
      *  getting table MP4_NEXTKEY. 
             MOVE 0 TO i
           .
        P106.
             EXEC SQL UPDATE MP4_NN
               SET NUMTEST = 1 END-EXEC
             MOVE SQLCODE TO SQL-COD
             COMPUTE i = i + 1
             if (i  <  pauze) then
               GO TO P106
             END-IF
      *end of pause 

             MOVE 0 TO knum
             EXEC SQL SELECT COUNT(*)
               INTO :knum
               FROM MP4_NEXTKEY WHERE AUTHOR = 'B' END-EXEC
             MOVE SQLCODE TO SQL-COD

             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

      *are we in sync? 

             if (knum  =  0) then
               DISPLAY " PLEASE start program MPB004!!! "
               GO TO P105
             END-IF

      *YES, we are in sync! 

             DISPLAY "Transaction A Starts!! "
             DISPLAY  " "
             DISPLAY "IF this test lasts too long, DEADLOCK"
             DISPLAY "has taken place, STOP this test!"

             MOVE 0 TO times1

      *          -----Concurrent Transactions Loop----- 
           .
        P110.
             MOVE 0 TO code1
             if (times1  >  retrys) then
               DISPLAY "TEST 0268 Aborted"
               GO TO P193
             END-IF
             EXEC SQL SELECT NUMTEST
               INTO :who1
               FROM MP4_NN END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF

      *MP4_NN UPDATE loop 
             MOVE 0 TO i
           .
        P111.
             EXEC SQL UPDATE MP4_NN
               SET NUMTEST = NUMTEST + 3 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             COMPUTE i = i + 1
             if (i  <  tranct  AND  code1  =  0) then
               GO TO P111
             END-IF

             EXEC SQL SELECT NUMTEST INTO :who2 FROM MP4_MM2 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF

      *MP4_MM2 UPDATE loop 
             MOVE 0 TO i

           .
        P112.
             EXEC SQL UPDATE MP4_MM2
               SET NUMTEST = NUMTEST + 5 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             COMPUTE i = i + 1
             if (i  <  4  AND  code1  =  0) then
               GO TO P112
             END-IF

             EXEC SQL SELECT NUMTEST INTO :rslt1 FROM MP4_NN END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL SELECT NUMTEST INTO :rslt2 FROM MP4_MM2 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF

             if (code1  =  0) then
               EXEC SQL COMMIT WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
             END-IF
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF

             if (code1  =  0  OR  times1  NOT =  2) then
               GO TO P114
             END-IF
             DISPLAY "After 3 attempts, let Program B go first."
             EXEC SQL ROLLBACK WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             MOVE 0 TO cnt

           .
        P113.
             EXEC SQL UPDATE MP4_NEXTKEY
               SET KEYNUM = KEYNUM +1 END-EXEC
             MOVE SQLCODE TO SQL-COD
             COMPUTE cnt = cnt + 1
             if (cnt  <  pauze2) then
               GO TO P113
             END-IF
             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

           .
        P114.
             if (code1  NOT =  0) then
               DISPLAY " "
               DISPLAY "!+!+!+!+!+!+!+!+ DEADLOCK?
      -    " !+!+!+!+!+!+!+!+!+!+!"
               DISPLAY "Negative SQLCODE (Deadlock?) was returned
      -    " earlier"
               DISPLAY "!+!+!+!+!+!+!+!+ DEADLOCK?
      -    " !+!+!+!+!+!+!+!+!+!+!"
               COMPUTE times1 = times1 + 1
               EXEC SQL ROLLBACK WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
               GO TO P110
             END-IF

      *                          -----Evaluation----- 
      *---- compute difference from original value ---- 
             COMPUTE rslt1 = rslt1 - who1
             COMPUTE rslt2 = rslt2 - who2

      *---- Give Program B time to finish ----- 
             DISPLAY "MPA004 transaction completed."
             MOVE 0 TO cnt
           .
        P115.
             EXEC SQL UPDATE MP4_NEXTKEY
               SET KEYNUM = KEYNUM +1 END-EXEC
             MOVE SQLCODE TO SQL-COD
             COMPUTE cnt = cnt + 1
             if (cnt  <  pauze3) then
               GO TO P115
             END-IF
             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

             COMPUTE tx = tranct * 3
             COMPUTE txls19 = tx - 19
             COMPUTE CXXL3T = 120 - (3 * tranct)

           .
        P116.
             MOVE 0 TO code1
             DISPLAY "MPB004 should be finished by now:"
      *date_time print 
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME
             EXEC SQL SELECT NUMTEST INTO :test2 FROM MP4_MM2 END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL SELECT NUMTEST INTO :test1 FROM MP4_NN END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             if (code1  =  1)    then
               DISPLAY "Cannot select from MP4_MM2 or MP4_NN"
               EXEC SQL COMMIT WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
               GO TO P116
             END-IF

             DISPLAY " The correct answer is :"
             DISPLAY " rslt1 is ", tx
             DISPLAY " rslt2 is 20"
             DISPLAY " test1 is ", txls19
             DISPLAY " test2 is ", CXXL3T
             DISPLAY " Your answer is :"
             DISPLAY " rslt1 is ", rslt1
             DISPLAY " rslt2 is ", rslt2
             DISPLAY " test1 is ", test1
             DISPLAY " test2 is ", test2

             if ( rslt1  =  tx  AND  rslt2  =  20  AND  test1  =  txls19
              AND  test2  =  CXXL3T) then
               DISPLAY "mpa004.pco: *** pass *** "
               EXEC SQL INSERT INTO HU.TESTREPORT
                 VALUES('0268','pass','PCO') END-EXEC
               MOVE SQLCODE TO SQL-COD
             else
               DISPLAY "mpa004.pco: *** fail *** "
               EXEC SQL INSERT INTO HU.TESTREPORT
                 VALUES('0268','fail','PCO') END-EXEC
               MOVE SQLCODE TO SQL-COD
               COMPUTE errcnt = errcnt + 1
               DISPLAY "MPA004 must check the total workload"
               DISPLAY " after MPB004 commits its results,"
               DISPLAY " otherwise, MPA004 will issues a false *** fail
      -    " ***"
               DISPLAY "If MPA004 fails and MPA004 finished first,"
               DISPLAY " then delete the results from TESTREPORT and
      -    " RERUN"
               DISPLAY " after (using TEd) to increase the value of
      -    " pauze3."
             END-IF

           .
        P193.
             DISPLAY  " "
             DISPLAY
             "===================================================="

             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

             if (times1  =  0) then
               DISPLAY "Look for DEADLOCK message from MPB004."
               DISPLAY "If MPB004 does not issues a DEADLOCK message,"
               DISPLAY " you will need to RERUN this test, after"
               DISPLAY " (using TEd) increasing value of variable
      -    " tranct."
             END-IF


      ******************** END TEST0268 *******************

      **** TESTER MAY CHOOSE TO INSERT CODE FOR errcnt > 0

           STOP RUN.

      *    ****  Procedures for PERFORM statements