Quelle mpb008.cob Sprache: Cobol

       IDENTIFICATION DIVISION.
       PROGRAM-ID.  MPB008.
       ENVIRONMENT DIVISION.
       CONFIGURATION SECTION.
       SOURCE-COMPUTER.  xyz.
       OBJECT-COMPUTER.  xyz.
       DATA DIVISION.
       WORKING-STORAGE SECTION.

      * EMBEDDED COBOL (file "MPB008.PCO")

      ****************************************************************
      *
      *                 COMMENT SECTION
      *
      * DATE 1992/07/31 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.
      *
      * MPB008.PCO
      * WRITTEN BY: David W. Flater
      *
      * THIS PROGRAM IS PART B OF A TWO-PART PROGRAM(A & B) THAT
      * TESTS THE CONCURRENCY OF SQL
      *
      * REFERENCES
      *   ANSI SQL-1992
      *     4.28  SQL-transactions
      *
      ****************************************************************

           EXEC SQL BEGIN DECLARE SECTION END-EXEC
       01  uid PIC  X(18).
       01  knum PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  uidx PIC  X(18).
             EXEC SQL END DECLARE SECTION END-EXEC
       01  i PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  j PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       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  code1 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  loops PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  flcnt PIC S9(9) DISPLAY SIGN LEADING SEPARATE.
       01  mxfail 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, mpb008.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

             MOVE 1 TO pauze
             MOVE 1 TO loops
             MOVE 0 TO flcnt
             MOVE 50 TO mxfail

      ******************** BEGIN TEST0517 *******************

             DISPLAY " TEST0517 "
             DISPLAY " Transactions serializable: Twins Problem"
             DISPLAY "Reference ANSI SQL-1992 section 4.28
      -    " SQL-transactions"
             DISPLAY " - - - - - - - - - - - - - - - - - - -"

             DISPLAY "*** This program is part B of a two-part"
             DISPLAY "*** program (A & B)."

             DISPLAY " This is Program B which starts after Program A...
      -    " "

      *                      -----Synchronization-----
           .
        P105.
             MOVE 0 TO knum
             EXEC SQL SELECT COUNT(*)
               INTO :knum
               FROM MP8_NEXTKEY WHERE AUTHOR = 'A' 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 MPA008!!! "
               GO TO P105
             END-IF

           .
        P106.
             MOVE 0 TO code1
             EXEC SQL INSERT INTO MP8_NEXTKEY (KEYNUM,AUTHOR)
               VALUES(2, 'B') END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT =  0) then
               MOVE 1 TO code1
             END-IF
             if (code1  NOT =  0) then
               EXEC SQL ROLLBACK WORK END-EXEC
               MOVE SQLCODE TO SQL-COD
               DISPLAY "Retrying synchronization logic."
               GO TO P106
             END-IF

      *YES, we are in sync!

             DISPLAY "Transaction B Starts!! "
      *date_time print
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME
             DISPLAY  " "
             DISPLAY "IF this test lasts too long, DEADLOCK"
             DISPLAY "has taken place, STOP this test!"

             DISPLAY  " "
             DISPLAY "This part of the test loops continuously trying
      -    " to"
             DISPLAY "insert a duplicate row into MP8_AA. If it
      -    " succeeds,"
             DISPLAY "there has been a serializability or unique
      -    " constraint"
             DISPLAY "failure."
             DISPLAY  " "

           .
        P101.
             DISPLAY "INSERT INTO MP8_AA VALUES (3,'B');"
             EXEC SQL INSERT INTO MP8_AA VALUES (3,'B') END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  <  0) then
               GO TO P120
             END-IF

             DISPLAY "COMMIT WORK;"
             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             if (SQLCODE  NOT <  0) then
               GO TO P166
             END-IF

           .
        P120.
             COMPUTE flcnt = flcnt + 1
             if (flcnt  >  mxfail) then
               GO TO P180
             END-IF
             DISPLAY "*** Negative SQLCODE (Deadlock or UNIQUE
      -    " violation?) ***"
      *date_time print
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME
             DISPLAY "Restarting transaction"
             EXEC SQL ROLLBACK WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             GO TO P101

           .
        P180.
             DISPLAY  " "
             DISPLAY "Maximum number of negative SQLCODEs exceeded"
      *date_time print
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME
             DISPLAY "THIS IS CORRECT BEHAVIOR FOR THIS TEST."
             EXEC SQL ROLLBACK WORK END-EXEC
             MOVE SQLCODE TO SQL-COD
             GO TO P198

           .
        P166.
             DISPLAY  " "
      *date_time print
           ACCEPT TO-DAY FROM DATE
           ACCEPT THE-TIME FROM TIME
           DISPLAY "Date run YYMMDD: " TO-DAY " at hhmmssff: " THE-TIME
             DISPLAY "TRANSACTION COMPLETED--THIS SHOULD NOT HAVE
      -    " HAPPENED!!"
             DISPLAY " mpb008.pco *** fail *** "
             EXEC SQL INSERT INTO HU.TESTREPORT
               VALUES('0517','fail','PCO') END-EXEC
             MOVE SQLCODE TO SQL-COD
             COMPUTE errcnt = errcnt + 1
             EXEC SQL COMMIT WORK END-EXEC
             MOVE SQLCODE TO SQL-COD

           .
        P198.
             DISPLAY  " "
             DISPLAY
             "===================================================="

      ******************** END TEST0517 *******************

      **** TESTER MAY CHOOSE TO INSERT CODE FOR errcnt > 0
           STOP RUN.

      *    ****  Procedures for PERFORM statements

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