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Intro To IDMS

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Margaret Sliming

This presentation covers basic concepts of the IDMS database structure including data relationships, database architecture, database definition, currency, COBOL commands for accessing an IDMS database, error handling, and additional information sources. The presentation agenda includes explaining data relationships like one-to-one, one-to-many and many-to-many relationships. It also discusses database architecture including how records are stored in areas and pages with unique database keys. Database definition concepts like record attributes, location modes, set attributes and indexed sets are also covered.

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09/06/16 M Sliming 1 Intro to IDMSIntro to IDMS Margaret SlimingMargaret Sliming OfOf DivaProgrammer, LLCDivaProgrammer, LLC www.web2IDMS.comwww.web2IDMS.com
09/06/16 2M Sliming IntroductionIntroduction This presentation will cover the basicThis presentation will cover the basic concepts of IDMS database structure, dataconcepts of IDMS database structure, data relationships and access methods.relationships and access methods.
09/06/16 3M Sliming AgendaAgenda  Data RelationshipsData Relationships  Database ArchitectureDatabase Architecture  Database DefinitionDatabase Definition  CurrencyCurrency  COBOL CommandsCOBOL Commands  Error HandlingError Handling  Central VersionCentral Version  CulpritCulprit  SQLSQL  Additional Information / SourcesAdditional Information / Sources
09/06/16 4M Sliming Data RelationshipsData Relationships TABLE RELATIONSHIPS PAYROLL ID TCHR SSN SALARY TEACHER ID NAME SSN DEPT ID DEPARTMENT ID NAME STUD-CRSE STUD ID CRSE ID COURSE ID NAME TCHR ID STUDENT ID NAME ADDR One-to-One One-to-Many Many-to-Many
09/06/16 5M Sliming Data Relationships (Con’t)Data Relationships (Con’t)  Data relates in three ways:Data relates in three ways:  One-to-One (eg. Payroll & Teacher)One-to-One (eg. Payroll & Teacher)  One-to-Many (eg. Teacher & Course)One-to-Many (eg. Teacher & Course)  Many-to-Many (eg. Course & Student)Many-to-Many (eg. Course & Student)  Relational databases use foreign keys to relateRelational databases use foreign keys to relate records and IDMS uses sets.records and IDMS uses sets.
09/06/16 6M Sliming Database ArchitectureDatabase Architecture
09/06/16 7M Sliming Database ArchitectureDatabase Architecture  The preceding page illustrates how records areThe preceding page illustrates how records are stored in IDMS.stored in IDMS.  The database is comprised of areas which areThe database is comprised of areas which are mapped to disk files. Areas are broken up intomapped to disk files. Areas are broken up into pages which contain the database records. Thepages which contain the database records. The records are uniquely identified by the pagerecords are uniquely identified by the page number, they reside on, and a sequence number,number, they reside on, and a sequence number, called a line number. This makes up what iscalled a line number. This makes up what is known as the database key or DB-KEY.known as the database key or DB-KEY.
09/06/16 8M Sliming Database ArchitectureDatabase Architecture Database Page
09/06/16 9M Sliming Database ArchitectureDatabase Architecture DATABASE KEYS
09/06/16 10M Sliming Database DefinitionDatabase Definition PAYROLL-100 100 F CALC 100-PYRL-ID DN ADMIN-AREA STUDENT-500 500 F CALC 500-STUD-ID DN ADMIN-AREACOURSE-400 400 F CALC 400-CRSE-ID DN ACADEMIC-AREA TEACHER-200 200 F CALC 200-TCHR-ID DN FACULTY-AREA STUD-CRSE-600 600 F VIA CRSE-STUDCRSE DN ACADEMIC-AREA DEPT-300 300 F CALC 300-DEPT-ID DN FACULTY-AREA TEACHER -COURSE STUDENT-STUDCRSE COURSE-STUDCRSE TEACHER-PAYROLL DEPT-TEACHER
09/06/16 11M Sliming Database DefinitionDatabase Definition 01 PAYROLL-100.01 PAYROLL-100. 01 COURSE-400.01 COURSE-400. 05 100-PYRL-ID PIC X(9).05 100-PYRL-ID PIC X(9). 05 400-CRSE-ID PIC X(3).05 400-CRSE-ID PIC X(3). 05 100-PYRL-SSN PIC 9(9).05 100-PYRL-SSN PIC 9(9). 05 400-CRSE-TITLE PIC X(20).05 400-CRSE-TITLE PIC X(20). 05 100-PYRL-SALARY PIC 9(6)V9(2).05 100-PYRL-SALARY PIC 9(6)V9(2). 05 400-CRSE-TCHR PIC X(5).05 400-CRSE-TCHR PIC X(5). 01 TEACHER-200.01 TEACHER-200. 01 STUDENT-500.01 STUDENT-500. 05 200-TCHR-ID PIC X(4).05 200-TCHR-ID PIC X(4). 05 500-STUD-ID PIC X(4).05 500-STUD-ID PIC X(4). 05 200-TCHR-SSN PIC 9(9).05 200-TCHR-SSN PIC 9(9). 05 500-STUD-NAME PIC X(30).05 500-STUD-NAME PIC X(30). 05 200-TCHR-NAME PIC X(30).05 200-TCHR-NAME PIC X(30). 05 500-STUD-ADDR PIC X(40).05 500-STUD-ADDR PIC X(40). 05 200-TCHR-DEPT PIC X(4).05 200-TCHR-DEPT PIC X(4). 01 DEPT-300.01 DEPT-300. 01 STUD-CRSE-600.01 STUD-CRSE-600. 05 300-DEPT-ID PIC X(4).05 300-DEPT-ID PIC X(4). 05 600-STUD-ID PIC X(4).05 600-STUD-ID PIC X(4). 05 300-DEPT-NAME PIC X(15).05 300-DEPT-NAME PIC X(15). 05 600-CRSE-ID PIC X(3).05 600-CRSE-ID PIC X(3). Record Descriptions
09/06/16 12M Sliming Database DefinitionDatabase Definition  A Schema contains the record, set and areaA Schema contains the record, set and area definitions for an IDMS database.definitions for an IDMS database.  A Subschema contains the records, sets andA Subschema contains the records, sets and areas that can be referenced by an applicationareas that can be referenced by an application and whether they can be updated or retrievedand whether they can be updated or retrieved only.only.  A DMCL maps the database areas to fileA DMCL maps the database areas to file blocks.blocks.
09/06/16 13M Sliming Database DefinitionDatabase Definition  To program IDMS applications, our mostTo program IDMS applications, our most valuable tool is the schema definition and/orvaluable tool is the schema definition and/or diagram, seen on slide 10, known as thediagram, seen on slide 10, known as the “Bachman” diagram.“Bachman” diagram.  In order to retrieve and/or update informationIn order to retrieve and/or update information in the database, we have to know how to get toin the database, we have to know how to get to it.it.  The following pages will detail how we defineThe following pages will detail how we define data relationships in IDMS.data relationships in IDMS.
09/06/16 14M Sliming Database DefinitionDatabase Definition  Record AttributesRecord Attributes  Location ModesLocation Modes  Set AttributesSet Attributes  Indexed SetsIndexed Sets  Area SweepsArea Sweeps
09/06/16 15M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes
09/06/16 16M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes  Record ID:Record ID: Unique numeric value within theUnique numeric value within the schema assigned to the record. It’s helpful toschema assigned to the record. It’s helpful to include this number in the record name and to alsoinclude this number in the record name and to also prefix each record element with it.prefix each record element with it.  Storage Mode:Storage Mode: This means storing the record asThis means storing the record as fixed or variable. Fixed is the most desirable so thefixed or variable. Fixed is the most desirable so the record does not change size when it gets updated.record does not change size when it gets updated. Variable records can get fragmented and thus takeVariable records can get fragmented and thus take more I/O to retrieve.more I/O to retrieve.
09/06/16 17M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes  Record Length:Record Length: This value includes the total length ofThis value includes the total length of all data elements plus four bytes for each pointerall data elements plus four bytes for each pointer database key associated with the record. Pointers willdatabase key associated with the record. Pointers will be discussed later with set options.be discussed later with set options.  Location ModeLocation Mode,, Set NameSet Name andand DuplicatesDuplicates IndicatorIndicator will we discussed in more detail later in thiswill we discussed in more detail later in this section.section.  Area Name:Area Name: Name of the database area the record isName of the database area the record is stored in.stored in.
09/06/16 18M Sliming Database Definitiion - Location ModesDatabase Definitiion - Location Modes  The manner in which a record occurrence is physicallyThe manner in which a record occurrence is physically located in an area of the database. The three types are:located in an area of the database. The three types are: CALC, VIA and DIRECT.CALC, VIA and DIRECT.  CALC: A method of determining the target page forCALC: A method of determining the target page for storage of a record in the database. The target page isstorage of a record in the database. The target page is calculated is calculated by means of a randomizingcalculated is calculated by means of a randomizing routine executed against the value of the Calc key in theroutine executed against the value of the Calc key in the record.record.
09/06/16 19M Sliming Database Definition - Location ModesDatabase Definition - Location Modes  VIA: Clusters member records in the same physicalVIA: Clusters member records in the same physical location for efficient database access. Optionally, Vialocation for efficient database access. Optionally, Via can cluster member records with their owners.can cluster member records with their owners.  DIRECT: Populates an area in the order the recordsDIRECT: Populates an area in the order the records are loaded. This mode is best used for data which isare loaded. This mode is best used for data which is static and will be retrieved in the order it physicallystatic and will be retrieved in the order it physically resides in the database.resides in the database.
09/06/16 20M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – CALC mode
09/06/16 21M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – VIA mode
09/06/16 22M Sliming Database Definition – Location ModesDatabase Definition – Location Modes This example illustrates how records are stored VIA when the owner and member reside in different areas.
09/06/16 23M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – DIRECT mode
09/06/16 24M Sliming Database Definition - Set AttributesDatabase Definition - Set Attributes  Sets relate records to each other in IDMS using aSets relate records to each other in IDMS using a number of parameters.number of parameters.  PointersPointers: Next, Prior, Owner, Index, Index Owner: Next, Prior, Owner, Index, Index Owner  MembershipMembership: Mandatory Automatic, Mandatory: Mandatory Automatic, Mandatory Manual, Optional Automatic, Optional ManualManual, Optional Automatic, Optional Manual  OrderOrder (Unsorted sets): First, Last, Next, Prior(Unsorted sets): First, Last, Next, Prior (Sorted sets): Ascending or(Sorted sets): Ascending or descending by keydescending by key  A database record contains a pointer (aka Db-key)A database record contains a pointer (aka Db-key) for each record it relates to. ie. If it is stored Next,for each record it relates to. ie. If it is stored Next, Prior and Owner in a set, it will contain the pointerPrior and Owner in a set, it will contain the pointer for the owner, previous and next record in the set.for the owner, previous and next record in the set.
09/06/16 25M Sliming Database Definition – Indexed SetsDatabase Definition – Indexed Sets SYSTEM-OWNED INDEX
09/06/16 26M Sliming Database Definition – Indexed SetsDatabase Definition – Indexed Sets USER-OWNED INDEX
09/06/16 27M Sliming Database Definition – Area SweepsDatabase Definition – Area Sweeps  This method of retrieval is used when records cannotThis method of retrieval is used when records cannot be retrieved using key information. The entire area isbe retrieved using key information. The entire area is read from beginning to end and the program selects theread from beginning to end and the program selects the desired records.desired records.  This can be a good method when all occurrences of aThis can be a good method when all occurrences of a record type are needed and there are not too manyrecord type are needed and there are not too many different record types in the area.different record types in the area.  The programmer must pay close attention to currencyThe programmer must pay close attention to currency when retrieving owner records with an area sweep andwhen retrieving owner records with an area sweep and then getting their member records when both recordsthen getting their member records when both records reside in the same area. Looping can occur if thereside in the same area. Looping can occur if the owner record is not made current of area before eachowner record is not made current of area before each obtain.obtain.
09/06/16 28M Sliming CurrencyCurrency  IDMS keeps track of record occurrences,IDMS keeps track of record occurrences, being processed, by area, set, record type andbeing processed, by area, set, record type and run-unit (program).run-unit (program).  The current record is usually the lastThe current record is usually the last record retrieved or updated.record retrieved or updated.  Currency is extremely important toCurrency is extremely important to understand, especially when updating aunderstand, especially when updating a database, for maintaining data integrity.database, for maintaining data integrity.
09/06/16 29M Sliming COBOL CommandsCOBOL Commands  ACCEPTACCEPT  BINDBIND  COMMITCOMMIT  CONNECTCONNECT  DISCONNECTDISCONNECT  ERASEERASE  FIND/OBTAINFIND/OBTAIN  FINISHFINISH  IFIF  MODIFYMODIFY  READYREADY  ROLLBACKROLLBACK
09/06/16 30M Sliming COBOL Commands -COBOL Commands - ACCEPTACCEPT  Retrieves information pertaining to the status of theRetrieves information pertaining to the status of the database.database.  Format:Format: ACCEPT {TASK CODE } INTOACCEPT {TASK CODE } INTO return-locationreturn-location.. {TASK ID }{TASK ID } {LTERM ID }{LTERM ID } {PTERM ID }{PTERM ID } {SYSVERSION}{SYSVERSION} {USER ID }{USER ID } {SCREENSIZE}{SCREENSIZE}
09/06/16 31M Sliming COBOL commands -COBOL commands - BINDBIND  Initiates a run-unit and establishes addressabilityInitiates a run-unit and establishes addressability in variable storage to the IDMS communicationin variable storage to the IDMS communication block, record types and optionally to procedureblock, record types and optionally to procedure control information.control information.  Format:Format: BIND {RUN-UNIT } .BIND {RUN-UNIT } . {record-name }{record-name }
09/06/16 32M Sliming COBOL Commands -COBOL Commands - COMMITCOMMIT  Makes database updates permanent. Ie. If aMakes database updates permanent. Ie. If a program abends without having issued anyprogram abends without having issued any ‘COMMIT’s, all updates issued by the program‘COMMIT’s, all updates issued by the program will be rolled back.will be rolled back.  Format:Format: COMMIT { } .COMMIT { } . {ALL}{ALL}
09/06/16 33M Sliming COBOL Commands -COBOL Commands - CONNECTCONNECT  Establishes a record occurrence as a member ofEstablishes a record occurrence as a member of a set occurrence. The set must not be defined asa set occurrence. The set must not be defined as Mandatory Automatic.Mandatory Automatic.  Format:Format: CONNECTCONNECT record-namerecord-name TOTO set-nameset-name ..
09/06/16 34M Sliming COBOL Commands -COBOL Commands - DISCONNECTDISCONNECT  Removes a member record occurrence from aRemoves a member record occurrence from a set but does not delete the record from theset but does not delete the record from the database. This command is only valid fordatabase. This command is only valid for records which are optional members of a set.records which are optional members of a set.  Format:Format: DISCONNECTDISCONNECT record-namerecord-name FROMFROM set-nameset-name ..
09/06/16 35M Sliming COBOL Commands -COBOL Commands - ERASEERASE  Deletes a record occurrence from the databaseDeletes a record occurrence from the database and optionally deletes records subordinate to it.and optionally deletes records subordinate to it.  Format:Format: ERASE record-name { } .ERASE record-name { } . {ALL MEMBERS}{ALL MEMBERS}
09/06/16 36M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN  The FIND statement locates a recordThe FIND statement locates a record occurrence in the database; the OBTAINoccurrence in the database; the OBTAIN statement locates a record and moves the datastatement locates a record and moves the data associated with the record to the record buffers.associated with the record to the record buffers. Because the FIND and OBTAIN commandBecause the FIND and OBTAIN command statements have identical formats, they arestatements have identical formats, they are discussed together. The six formats of thediscussed together. The six formats of the FIND/OBTAIN statement are as follows:FIND/OBTAIN statement are as follows:
09/06/16 37M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN  FIND/OBTAIN CALCFIND/OBTAIN CALC accesses a record occurrence by usingaccesses a record occurrence by using its CALC key value.its CALC key value.  FIND/OBTAIN CURRENTFIND/OBTAIN CURRENT accesses a record occurrence byaccesses a record occurrence by using established currencies.using established currencies.  FIND/OBTAIN DB-KEYFIND/OBTAIN DB-KEY accesses a record occurrence byaccesses a record occurrence by using its database key.using its database key.  FIND/OBTAIN OWNERFIND/OBTAIN OWNER accesses the owner record of a setaccesses the owner record of a set occurrence.occurrence.  FIND/OBTAIN WITHIN SET USING SORT KEYFIND/OBTAIN WITHIN SET USING SORT KEY accesses a record occurrence in a sorted set by using its sort keyaccesses a record occurrence in a sorted set by using its sort key value.value.  FIND/OBTAIN WITHIN SET/AREAFIND/OBTAIN WITHIN SET/AREA accesses a recordaccesses a record occurrence based on its logical location within a set or on itsoccurrence based on its logical location within a set or on its physical location within an area.physical location within an area.
09/06/16 38M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN Formats:Formats:  FIND / OBTAIN CALCFIND / OBTAIN CALC record-namerecord-name ..  FIND / OBTAIN CURRENT {FIND / OBTAIN CURRENT { record-namerecord-name } .} . {WITHIN{WITHIN set-nameset-name }} {WITHIN{WITHIN area-namearea-name }}  FIND / OBTAIN DB-KEY ISFIND / OBTAIN DB-KEY IS db-keydb-key ..  FIND / OBTAIN OWNER WITHINFIND / OBTAIN OWNER WITHIN set-nameset-name ..  FIND / OBTAINFIND / OBTAIN record-namerecord-name WITHINWITHIN set-nameset-name USINGUSING sort-keysort-key..  FIND / OBTAIN {NEXT} { } WITHIN { set-name } .FIND / OBTAIN {NEXT} { } WITHIN { set-name } . {PRIOR} {{PRIOR} {record-name } { area-name } {FIRST} {LAST} {seq-nbr}
09/06/16 39M Sliming COBOL Commands -COBOL Commands - FINISHFINISH  Causes affected database sessions to terminate.Causes affected database sessions to terminate.  Format:Format: FINISH .FINISH .
09/06/16 40M Sliming COBOL Commands -COBOL Commands - IFIF  The IF statement allows the program to test for theThe IF statement allows the program to test for the presence of member record occurrences in a set and topresence of member record occurrences in a set and to determine the membership status of a recorddetermine the membership status of a record occurrence in a specified set; once the set has beenoccurrence in a specified set; once the set has been evaluated, the IF statement specifies further actionevaluated, the IF statement specifies further action based on the outcome of the evaluation. For example,based on the outcome of the evaluation. For example, an IF statement might be used to determine whether aan IF statement might be used to determine whether a set occurrence is empty and, if it is empty, to erase theset occurrence is empty and, if it is empty, to erase the owner record.owner record.  Note: DML IF statements cannot be nested within COBOL IF statements.
09/06/16 41M Sliming COBOL Commands -COBOL Commands - IFIF  Depending on its format, the IF statement uses set or run-unit currency. The object set occurrence of an IF statement is determined by the owner of the current record of the named set; the object record occurrence is determined by the current of run unit.  Each IF statement contains a conditional phrase and an imperative statement. When an IF is issued, the precompiler first generates a call to the DBMS to execute the conditional phrase; the results of the test determine whether or not the imperative statement is executed.
09/06/16 42M Sliming COBOL Commands -COBOL Commands - IFIF Formats:Formats:  IFIF set-nameset-name EMPTYEMPTY imperative-statementimperative-statement ..  IFIF set-nameset-name NOT EMPTYNOT EMPTY imperative-statement ..  IFIF set-nameset-name MEMBERMEMBER imperative-statementimperative-statement ..  IF NOTIF NOT set-nameset-name MEMBERMEMBER imperative-statementimperative-statement ..
09/06/16 43M Sliming COBOL Commands -COBOL Commands - ModifyModify  Replaces the contents of a database record occurrenceReplaces the contents of a database record occurrence with the values in it’s corresponding variable storage.with the values in it’s corresponding variable storage. Note: The database record being modified, mustNote: The database record being modified, must always be current of run-unit.always be current of run-unit.  Format:Format: MODIFYMODIFY record-namerecord-name ..
09/06/16 44M Sliming COBOL Commands -COBOL Commands - READYREADY  Prepares a database area for access by DML functions and specifies that area's usage mode.  Format: READY { } USAGE-MODE {UPDATE } .READY { } USAGE-MODE {UPDATE } . {{ area-namearea-name } {RETRIEVAL}} {RETRIEVAL}
09/06/16 45M Sliming COBOL Commands -COBOL Commands - ROLLBACKROLLBACK  Rolls back uncommitted changes made to the databaseRolls back uncommitted changes made to the database through an individual run unit.through an individual run unit.  Format:Format: ROLLBACK { CONTINUE } .ROLLBACK { CONTINUE } .  The CONTINUE option allows the run-unit to remainThe CONTINUE option allows the run-unit to remain active after the changes have been backed out.active after the changes have been backed out. Database access can be resumed without issuing BINDDatabase access can be resumed without issuing BIND and READY statements.and READY statements.
09/06/16 46M Sliming ERROR HANDLINGERROR HANDLING  After each IDMS command executes, a value isAfter each IDMS command executes, a value is returned into a field called ERROR-STATUS which isreturned into a field called ERROR-STATUS which is ‘0000’ if the command was successful, or a 4-byte value‘0000’ if the command was successful, or a 4-byte value indicating the command in error and the reason for theindicating the command in error and the reason for the error. The first two bytes of ERROR-STATUSerror. The first two bytes of ERROR-STATUS indicate the command and the last two bytes indicateindicate the command and the last two bytes indicate the cause of the error.the cause of the error.  Every IDMS error should be trapped and theEvery IDMS error should be trapped and the appropriate action should be taken. This action may beappropriate action should be taken. This action may be an error message or an Abort of the programan error message or an Abort of the program depending on the severity of the error.depending on the severity of the error.  A list of these error status codes can be found inA list of these error status codes can be found in Volume 4, Chapter 11 of the ‘IDMS Messages andVolume 4, Chapter 11 of the ‘IDMS Messages and Codes’ manuals.Codes’ manuals.
09/06/16 47M Sliming ERROR HANDLINGERROR HANDLING Component Major code DML functionComponent Major code DML function  00 Any DML function00 Any DML function  01 FINISH01 FINISH  02 ERASE02 ERASE  03 FIND/OBTAIN03 FIND/OBTAIN  05 GET05 GET  06 KEEP06 KEEP  07 CONNECT07 CONNECT  08 MODIFY08 MODIFY  09 READY09 READY  11 DISCONNECT11 DISCONNECT  12 STORE12 STORE  14 BIND14 BIND  15 ACCEPT15 ACCEPT  16 IF16 IF  17 RETURN17 RETURN  18 COMMIT18 COMMIT  19 ROLLBACK19 ROLLBACK  20 LRF requests20 LRF requests
09/06/16 48M Sliming Central Version / Local ModeCentral Version / Local Mode  CENTRAL VERSIONCENTRAL VERSION is an IDMS system that enablesis an IDMS system that enables multiple applications to access the database concurrently. Amultiple applications to access the database concurrently. A central version controls access to data at the individual recordcentral version controls access to data at the individual record (or row) level thus providing integrity while maximizing(or row) level thus providing integrity while maximizing concurrency. It also provides automatic recovery in the event ofconcurrency. It also provides automatic recovery in the event of failure. All applications executing within a TP monitorfailure. All applications executing within a TP monitor (including DC/UCF) use central version services to access(including DC/UCF) use central version services to access IDMS data. Batch applications can access data in centralIDMS data. Batch applications can access data in central version or local mode.version or local mode.  LOCAL MODELOCAL MODE is a mode of operation in which a batchis a mode of operation in which a batch program uses a dedicated copy DBMS to access the database.program uses a dedicated copy DBMS to access the database. In local mode, only one program can update the database at aIn local mode, only one program can update the database at a time. Updates in local mode are usually rare and only donetime. Updates in local mode are usually rare and only done when it is faster to back of the database, run the update programwhen it is faster to back of the database, run the update program and restore in the event of an abend than running under Centraland restore in the event of an abend than running under Central Version.Version.
09/06/16 49M Sliming Central Version / Local ModeCentral Version / Local Mode
09/06/16 50M Sliming CulpritCulprit Advantage CA-Culprit is a batch utility that generates reports from conventional and database files. Data Input: As shown in the diagram on the following page, Advantage CA-Culprit can extract data from several database and conventional file structures. As many as 32 conventional files can be read and processed in one Advantage CA-Culprit run. Each run can generate up to 100 reports from the same input data. Reports can be formatted as printed output, stored tables, or written to cards, tape, or disk. The diagram shows The Advantage CA-Culprit Data Access and Transfer Network. Advantage CA-Culprit can extract data from and write reports to several database and file structures. Advantage CA-Culprit is fully integrated with other products, such as Advantage CA-IDMS/DB, the Integrated Data Dictionary (IDD), and CA-ICMS.
09/06/16 51M Sliming CulpritCulprit
09/06/16 52M Sliming CulpritCulprit Sample program to list Service Office Address History for a Provider:Sample program to list Service Office Address History for a Provider: DATABASE DICTNAME=DICT05DATABASE DICTNAME=DICT05 IN DB SS=DPU001IN DB SS=DPU001 PATHAA DPR-PROVSVOFC DPR-ADDRHISTPATHAA DPR-PROVSVOFC DPR-ADDRHIST 01OUT 132 1330 D PS(3375) DD=SYS036,36 LT=S01OUT 132 1330 D PS(3375) DD=SYS036,36 LT=S 0151*010 339-BILL-PROV-ID-NBR SZ=60151*010 339-BILL-PROV-ID-NBR SZ=6 0151*020 339-SERVICE-OFC-NBR SZ=20151*020 339-SERVICE-OFC-NBR SZ=2 0151*030 364-SERVICE-OFC-ADDR-GRP SZ=790151*030 364-SERVICE-OFC-ADDR-GRP SZ=79 0151*040 364-SVCOFC-STATUS-CODE SZ=10151*040 364-SVCOFC-STATUS-CODE SZ=1 0151*050 364-SVCOFC-ADDR-EFFDATE-FULL SZ=80151*050 364-SVCOFC-ADDR-EFFDATE-FULL SZ=8 0151*060 364-SVCOFC-ADDR-ENDDATE-FULL SZ=80151*060 364-SVCOFC-ADDR-ENDDATE-FULL SZ=8 0151*070 364-SVCOFC-PROVL-DATE-TIME SZ=140151*070 364-SVCOFC-PROVL-DATE-TIME SZ=14 017 IF 339-BILL-PROV-ID-NBR = 'B20000' 010017 IF 339-BILL-PROV-ID-NBR = 'B20000' 010 017 DROP017 DROP 017010 TAKE017010 TAKE
09/06/16 53M Sliming CulpritCulprit Output from Sample program:Output from Sample program: B20000 52 7117 DAWN VIEW CT SUITE 5225 CITRUS HEIGHTS CA956100000C20 C 20040910 20040910 20040910140146B20000 52 7117 DAWN VIEW CT SUITE 5225 CITRUS HEIGHTS CA956100000C20 C 20040910 20040910 20040910140146 B20000 52 11432123N VIEW CT SUITE CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135446B20000 52 11432123N VIEW CT SUITE CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135446 B20000 52 11432123N VIEW CT CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135041B20000 52 11432123N VIEW CT CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135041 B20000 52 7117 DAWN VIEW CT CITRUS HEIGHTS CA956100000A20 A 20040828 20040910 20040910124434B20000 52 7117 DAWN VIEW CT CITRUS HEIGHTS CA956100000A20 A 20040828 20040910 20040910124434 B20000 56 NEW ADDRESS DIAMOND SPRINGS CA956190000A20 A 20050801 20050830 20050826105313B20000 56 NEW ADDRESS DIAMOND SPRINGS CA956190000A20 A 20050801 20050830 20050826105313 B20000 47 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000C20 C 20041001 20041005 20041005100933B20000 47 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000C20 C 20041001 20041005 20041005100933 B20000 30 7117 NEW ADDRESS CITRUS HEIGHTS CA956213501C20 C 20050829 20050829 20050829143219B20000 30 7117 NEW ADDRESS CITRUS HEIGHTS CA956213501C20 C 20050829 20050829 20050829143219 B20000 54 75 CH CA956100000A20 A 20040901 20040907 20040907150639B20000 54 75 CH CA956100000A20 A 20040901 20040907 20040907150639 B20000 55 TEST ADDRESSS TT CITY CA956100000C20 C 20030901 20040830 20041026154158B20000 55 TEST ADDRESSS TT CITY CA956100000C20 C 20030901 20040830 20041026154158 B20000 55 TEST ADDRESSS CITY CA956100000A20 A 20040901 20041026 20040923141317B20000 55 TEST ADDRESSS CITY CA956100000A20 A 20040901 20041026 20040923141317 B20000 50 785 CH CA956100000A20 A 20040701 20041005 20040830143345B20000 50 785 CH CA956100000A20 A 20040701 20041005 20040830143345 B20000 48 12123 DH CA956100000C20 C 20041002 20041005 20041005101456B20000 48 12123 DH CA956100000C20 C 20041002 20041005 20041005101456 B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20060316 20060328111055B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20060316 20060328111055 B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20040901 20040910 20040907150441B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20040901 20040910 20040907150441 B20000 5 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956284011C20 C 20040828 20040907 20040907132818B20000 5 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956284011C20 C 20040828 20040907 20040907132818 B20000 53 75 X CH CA956100000C20 C 20041001 20041005 20041005101533B20000 53 75 X CH CA956100000C20 C 20041001 20041005 20041005101533 B20000 53 75 CH CA956100000A20 A 20040401 20041005 20040901155604B20000 53 75 CH CA956100000A20 A 20040401 20041005 20040901155604 B20000 1 5555555555555ET PLACERVILLE CA956213501C20 C 20060314 20060315113330B20000 1 5555555555555ET PLACERVILLE CA956213501C20 C 20060314 20060315113330 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060308 20060315 20060309113516B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060308 20060315 20060309113516 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060207 20060216 20060207161221B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060207 20060216 20060207161221 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060205 20060207 20060206131043B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060205 20060207 20060206131043 B20000 1 555 MAIN STREET PO BOX 5 PLACERVILLE CA956213501C20 C 20040830 20041207 20040901160019B20000 1 555 MAIN STREET PO BOX 5 PLACERVILLE CA956213501C20 C 20040830 20041207 20040901160019 B20000 46 DD X CC CA956100000C20 C 20041001 20041005 20041005101738B20000 46 DD X CC CA956100000C20 C 20041001 20041005 20041005101738 B20000 51 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000A20 A 20040828 20041005 20040831153728B20000 51 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000A20 A 20040828 20041005 20040831153728
09/06/16 54M Sliming CulpritCulprit ADDITIONAL INFORMATIONADDITIONAL INFORMATION G:SYSGRPIDMS R16 ManualsIDMS Manuals – PDFB01287-1EG:SYSGRPIDMS R16 ManualsIDMS Manuals – PDFB01287-1E TSO DATASETS:TSO DATASETS:  DLST.CULP.SOURCEDLST.CULP.SOURCE  DLST.CULP.JCLDLST.CULP.JCL  DLST.CULP.PROCDLST.CULP.PROC
09/06/16 55M Sliming SQLSQL  With the SQL feature, non-SQL defined IDMSWith the SQL feature, non-SQL defined IDMS databases can be accessed using SQL DML (IDMSdatabases can be accessed using SQL DML (IDMS version of SQL). This is done by either using theversion of SQL). This is done by either using the Online Command Facility (OCF) or the batch programOnline Command Facility (OCF) or the batch program IDMSBCF.IDMSBCF.  An SQL schema is created which maps to that of theAn SQL schema is created which maps to that of the non-SQL IDMS database.non-SQL IDMS database.  Records defined in the non-SQL schema can then be accessed as tables in SQL.  The following page show an example of executing aThe following page show an example of executing a SELECT statement using OCF.SELECT statement using OCF.
09/06/16 56M Sliming SQLSQL
09/06/16 57M Sliming Additional Information / SourcesAdditional Information / Sources  List of manuals and file names located on G:List of manuals and file names located on G: drive at: G:SYSGRPIDMS R16 Manualsdrive at: G:SYSGRPIDMS R16 Manuals  Glossary: B01251-1EGlossary: B01251-1E  DML Reference – COBOL: B01247-1EDML Reference – COBOL: B01247-1E  Messages and Codes – Volume 4: B01259-2EMessages and Codes – Volume 4: B01259-2E  SQL Option Self-Training Guide B01274-1ESQL Option Self-Training Guide B01274-1E  G:SYSGRP2006 IUA WorkshopG:SYSGRP2006 IUA Workshop  CDMMIS Schema Definition:CDMMIS Schema Definition: DDLST.IDMS.RPTS(CV5SCHEM)LST.IDMS.RPTS(CV5SCHEM)

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Intro To IDMS

  • 1. 09/06/16 M Sliming 1 Intro to IDMSIntro to IDMS Margaret SlimingMargaret Sliming OfOf DivaProgrammer, LLCDivaProgrammer, LLC www.web2IDMS.comwww.web2IDMS.com
  • 2. 09/06/16 2M Sliming IntroductionIntroduction This presentation will cover the basicThis presentation will cover the basic concepts of IDMS database structure, dataconcepts of IDMS database structure, data relationships and access methods.relationships and access methods.
  • 3. 09/06/16 3M Sliming AgendaAgenda  Data RelationshipsData Relationships  Database ArchitectureDatabase Architecture  Database DefinitionDatabase Definition  CurrencyCurrency  COBOL CommandsCOBOL Commands  Error HandlingError Handling  Central VersionCentral Version  CulpritCulprit  SQLSQL  Additional Information / SourcesAdditional Information / Sources
  • 4. 09/06/16 4M Sliming Data RelationshipsData Relationships TABLE RELATIONSHIPS PAYROLL ID TCHR SSN SALARY TEACHER ID NAME SSN DEPT ID DEPARTMENT ID NAME STUD-CRSE STUD ID CRSE ID COURSE ID NAME TCHR ID STUDENT ID NAME ADDR One-to-One One-to-Many Many-to-Many
  • 5. 09/06/16 5M Sliming Data Relationships (Con’t)Data Relationships (Con’t)  Data relates in three ways:Data relates in three ways:  One-to-One (eg. Payroll & Teacher)One-to-One (eg. Payroll & Teacher)  One-to-Many (eg. Teacher & Course)One-to-Many (eg. Teacher & Course)  Many-to-Many (eg. Course & Student)Many-to-Many (eg. Course & Student)  Relational databases use foreign keys to relateRelational databases use foreign keys to relate records and IDMS uses sets.records and IDMS uses sets.
  • 6. 09/06/16 6M Sliming Database ArchitectureDatabase Architecture
  • 7. 09/06/16 7M Sliming Database ArchitectureDatabase Architecture  The preceding page illustrates how records areThe preceding page illustrates how records are stored in IDMS.stored in IDMS.  The database is comprised of areas which areThe database is comprised of areas which are mapped to disk files. Areas are broken up intomapped to disk files. Areas are broken up into pages which contain the database records. Thepages which contain the database records. The records are uniquely identified by the pagerecords are uniquely identified by the page number, they reside on, and a sequence number,number, they reside on, and a sequence number, called a line number. This makes up what iscalled a line number. This makes up what is known as the database key or DB-KEY.known as the database key or DB-KEY.
  • 8. 09/06/16 8M Sliming Database ArchitectureDatabase Architecture Database Page
  • 9. 09/06/16 9M Sliming Database ArchitectureDatabase Architecture DATABASE KEYS
  • 10. 09/06/16 10M Sliming Database DefinitionDatabase Definition PAYROLL-100 100 F CALC 100-PYRL-ID DN ADMIN-AREA STUDENT-500 500 F CALC 500-STUD-ID DN ADMIN-AREACOURSE-400 400 F CALC 400-CRSE-ID DN ACADEMIC-AREA TEACHER-200 200 F CALC 200-TCHR-ID DN FACULTY-AREA STUD-CRSE-600 600 F VIA CRSE-STUDCRSE DN ACADEMIC-AREA DEPT-300 300 F CALC 300-DEPT-ID DN FACULTY-AREA TEACHER -COURSE STUDENT-STUDCRSE COURSE-STUDCRSE TEACHER-PAYROLL DEPT-TEACHER
  • 11. 09/06/16 11M Sliming Database DefinitionDatabase Definition 01 PAYROLL-100.01 PAYROLL-100. 01 COURSE-400.01 COURSE-400. 05 100-PYRL-ID PIC X(9).05 100-PYRL-ID PIC X(9). 05 400-CRSE-ID PIC X(3).05 400-CRSE-ID PIC X(3). 05 100-PYRL-SSN PIC 9(9).05 100-PYRL-SSN PIC 9(9). 05 400-CRSE-TITLE PIC X(20).05 400-CRSE-TITLE PIC X(20). 05 100-PYRL-SALARY PIC 9(6)V9(2).05 100-PYRL-SALARY PIC 9(6)V9(2). 05 400-CRSE-TCHR PIC X(5).05 400-CRSE-TCHR PIC X(5). 01 TEACHER-200.01 TEACHER-200. 01 STUDENT-500.01 STUDENT-500. 05 200-TCHR-ID PIC X(4).05 200-TCHR-ID PIC X(4). 05 500-STUD-ID PIC X(4).05 500-STUD-ID PIC X(4). 05 200-TCHR-SSN PIC 9(9).05 200-TCHR-SSN PIC 9(9). 05 500-STUD-NAME PIC X(30).05 500-STUD-NAME PIC X(30). 05 200-TCHR-NAME PIC X(30).05 200-TCHR-NAME PIC X(30). 05 500-STUD-ADDR PIC X(40).05 500-STUD-ADDR PIC X(40). 05 200-TCHR-DEPT PIC X(4).05 200-TCHR-DEPT PIC X(4). 01 DEPT-300.01 DEPT-300. 01 STUD-CRSE-600.01 STUD-CRSE-600. 05 300-DEPT-ID PIC X(4).05 300-DEPT-ID PIC X(4). 05 600-STUD-ID PIC X(4).05 600-STUD-ID PIC X(4). 05 300-DEPT-NAME PIC X(15).05 300-DEPT-NAME PIC X(15). 05 600-CRSE-ID PIC X(3).05 600-CRSE-ID PIC X(3). Record Descriptions
  • 12. 09/06/16 12M Sliming Database DefinitionDatabase Definition  A Schema contains the record, set and areaA Schema contains the record, set and area definitions for an IDMS database.definitions for an IDMS database.  A Subschema contains the records, sets andA Subschema contains the records, sets and areas that can be referenced by an applicationareas that can be referenced by an application and whether they can be updated or retrievedand whether they can be updated or retrieved only.only.  A DMCL maps the database areas to fileA DMCL maps the database areas to file blocks.blocks.
  • 13. 09/06/16 13M Sliming Database DefinitionDatabase Definition  To program IDMS applications, our mostTo program IDMS applications, our most valuable tool is the schema definition and/orvaluable tool is the schema definition and/or diagram, seen on slide 10, known as thediagram, seen on slide 10, known as the “Bachman” diagram.“Bachman” diagram.  In order to retrieve and/or update informationIn order to retrieve and/or update information in the database, we have to know how to get toin the database, we have to know how to get to it.it.  The following pages will detail how we defineThe following pages will detail how we define data relationships in IDMS.data relationships in IDMS.
  • 14. 09/06/16 14M Sliming Database DefinitionDatabase Definition  Record AttributesRecord Attributes  Location ModesLocation Modes  Set AttributesSet Attributes  Indexed SetsIndexed Sets  Area SweepsArea Sweeps
  • 15. 09/06/16 15M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes
  • 16. 09/06/16 16M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes  Record ID:Record ID: Unique numeric value within theUnique numeric value within the schema assigned to the record. It’s helpful toschema assigned to the record. It’s helpful to include this number in the record name and to alsoinclude this number in the record name and to also prefix each record element with it.prefix each record element with it.  Storage Mode:Storage Mode: This means storing the record asThis means storing the record as fixed or variable. Fixed is the most desirable so thefixed or variable. Fixed is the most desirable so the record does not change size when it gets updated.record does not change size when it gets updated. Variable records can get fragmented and thus takeVariable records can get fragmented and thus take more I/O to retrieve.more I/O to retrieve.
  • 17. 09/06/16 17M Sliming Database Definition - Record AttributesDatabase Definition - Record Attributes  Record Length:Record Length: This value includes the total length ofThis value includes the total length of all data elements plus four bytes for each pointerall data elements plus four bytes for each pointer database key associated with the record. Pointers willdatabase key associated with the record. Pointers will be discussed later with set options.be discussed later with set options.  Location ModeLocation Mode,, Set NameSet Name andand DuplicatesDuplicates IndicatorIndicator will we discussed in more detail later in thiswill we discussed in more detail later in this section.section.  Area Name:Area Name: Name of the database area the record isName of the database area the record is stored in.stored in.
  • 18. 09/06/16 18M Sliming Database Definitiion - Location ModesDatabase Definitiion - Location Modes  The manner in which a record occurrence is physicallyThe manner in which a record occurrence is physically located in an area of the database. The three types are:located in an area of the database. The three types are: CALC, VIA and DIRECT.CALC, VIA and DIRECT.  CALC: A method of determining the target page forCALC: A method of determining the target page for storage of a record in the database. The target page isstorage of a record in the database. The target page is calculated is calculated by means of a randomizingcalculated is calculated by means of a randomizing routine executed against the value of the Calc key in theroutine executed against the value of the Calc key in the record.record.
  • 19. 09/06/16 19M Sliming Database Definition - Location ModesDatabase Definition - Location Modes  VIA: Clusters member records in the same physicalVIA: Clusters member records in the same physical location for efficient database access. Optionally, Vialocation for efficient database access. Optionally, Via can cluster member records with their owners.can cluster member records with their owners.  DIRECT: Populates an area in the order the recordsDIRECT: Populates an area in the order the records are loaded. This mode is best used for data which isare loaded. This mode is best used for data which is static and will be retrieved in the order it physicallystatic and will be retrieved in the order it physically resides in the database.resides in the database.
  • 20. 09/06/16 20M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – CALC mode
  • 21. 09/06/16 21M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – VIA mode
  • 22. 09/06/16 22M Sliming Database Definition – Location ModesDatabase Definition – Location Modes This example illustrates how records are stored VIA when the owner and member reside in different areas.
  • 23. 09/06/16 23M Sliming Database Definition - Location ModesDatabase Definition - Location Modes Example – DIRECT mode
  • 24. 09/06/16 24M Sliming Database Definition - Set AttributesDatabase Definition - Set Attributes  Sets relate records to each other in IDMS using aSets relate records to each other in IDMS using a number of parameters.number of parameters.  PointersPointers: Next, Prior, Owner, Index, Index Owner: Next, Prior, Owner, Index, Index Owner  MembershipMembership: Mandatory Automatic, Mandatory: Mandatory Automatic, Mandatory Manual, Optional Automatic, Optional ManualManual, Optional Automatic, Optional Manual  OrderOrder (Unsorted sets): First, Last, Next, Prior(Unsorted sets): First, Last, Next, Prior (Sorted sets): Ascending or(Sorted sets): Ascending or descending by keydescending by key  A database record contains a pointer (aka Db-key)A database record contains a pointer (aka Db-key) for each record it relates to. ie. If it is stored Next,for each record it relates to. ie. If it is stored Next, Prior and Owner in a set, it will contain the pointerPrior and Owner in a set, it will contain the pointer for the owner, previous and next record in the set.for the owner, previous and next record in the set.
  • 25. 09/06/16 25M Sliming Database Definition – Indexed SetsDatabase Definition – Indexed Sets SYSTEM-OWNED INDEX
  • 26. 09/06/16 26M Sliming Database Definition – Indexed SetsDatabase Definition – Indexed Sets USER-OWNED INDEX
  • 27. 09/06/16 27M Sliming Database Definition – Area SweepsDatabase Definition – Area Sweeps  This method of retrieval is used when records cannotThis method of retrieval is used when records cannot be retrieved using key information. The entire area isbe retrieved using key information. The entire area is read from beginning to end and the program selects theread from beginning to end and the program selects the desired records.desired records.  This can be a good method when all occurrences of aThis can be a good method when all occurrences of a record type are needed and there are not too manyrecord type are needed and there are not too many different record types in the area.different record types in the area.  The programmer must pay close attention to currencyThe programmer must pay close attention to currency when retrieving owner records with an area sweep andwhen retrieving owner records with an area sweep and then getting their member records when both recordsthen getting their member records when both records reside in the same area. Looping can occur if thereside in the same area. Looping can occur if the owner record is not made current of area before eachowner record is not made current of area before each obtain.obtain.
  • 28. 09/06/16 28M Sliming CurrencyCurrency  IDMS keeps track of record occurrences,IDMS keeps track of record occurrences, being processed, by area, set, record type andbeing processed, by area, set, record type and run-unit (program).run-unit (program).  The current record is usually the lastThe current record is usually the last record retrieved or updated.record retrieved or updated.  Currency is extremely important toCurrency is extremely important to understand, especially when updating aunderstand, especially when updating a database, for maintaining data integrity.database, for maintaining data integrity.
  • 29. 09/06/16 29M Sliming COBOL CommandsCOBOL Commands  ACCEPTACCEPT  BINDBIND  COMMITCOMMIT  CONNECTCONNECT  DISCONNECTDISCONNECT  ERASEERASE  FIND/OBTAINFIND/OBTAIN  FINISHFINISH  IFIF  MODIFYMODIFY  READYREADY  ROLLBACKROLLBACK
  • 30. 09/06/16 30M Sliming COBOL Commands -COBOL Commands - ACCEPTACCEPT  Retrieves information pertaining to the status of theRetrieves information pertaining to the status of the database.database.  Format:Format: ACCEPT {TASK CODE } INTOACCEPT {TASK CODE } INTO return-locationreturn-location.. {TASK ID }{TASK ID } {LTERM ID }{LTERM ID } {PTERM ID }{PTERM ID } {SYSVERSION}{SYSVERSION} {USER ID }{USER ID } {SCREENSIZE}{SCREENSIZE}
  • 31. 09/06/16 31M Sliming COBOL commands -COBOL commands - BINDBIND  Initiates a run-unit and establishes addressabilityInitiates a run-unit and establishes addressability in variable storage to the IDMS communicationin variable storage to the IDMS communication block, record types and optionally to procedureblock, record types and optionally to procedure control information.control information.  Format:Format: BIND {RUN-UNIT } .BIND {RUN-UNIT } . {record-name }{record-name }
  • 32. 09/06/16 32M Sliming COBOL Commands -COBOL Commands - COMMITCOMMIT  Makes database updates permanent. Ie. If aMakes database updates permanent. Ie. If a program abends without having issued anyprogram abends without having issued any ‘COMMIT’s, all updates issued by the program‘COMMIT’s, all updates issued by the program will be rolled back.will be rolled back.  Format:Format: COMMIT { } .COMMIT { } . {ALL}{ALL}
  • 33. 09/06/16 33M Sliming COBOL Commands -COBOL Commands - CONNECTCONNECT  Establishes a record occurrence as a member ofEstablishes a record occurrence as a member of a set occurrence. The set must not be defined asa set occurrence. The set must not be defined as Mandatory Automatic.Mandatory Automatic.  Format:Format: CONNECTCONNECT record-namerecord-name TOTO set-nameset-name ..
  • 34. 09/06/16 34M Sliming COBOL Commands -COBOL Commands - DISCONNECTDISCONNECT  Removes a member record occurrence from aRemoves a member record occurrence from a set but does not delete the record from theset but does not delete the record from the database. This command is only valid fordatabase. This command is only valid for records which are optional members of a set.records which are optional members of a set.  Format:Format: DISCONNECTDISCONNECT record-namerecord-name FROMFROM set-nameset-name ..
  • 35. 09/06/16 35M Sliming COBOL Commands -COBOL Commands - ERASEERASE  Deletes a record occurrence from the databaseDeletes a record occurrence from the database and optionally deletes records subordinate to it.and optionally deletes records subordinate to it.  Format:Format: ERASE record-name { } .ERASE record-name { } . {ALL MEMBERS}{ALL MEMBERS}
  • 36. 09/06/16 36M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN  The FIND statement locates a recordThe FIND statement locates a record occurrence in the database; the OBTAINoccurrence in the database; the OBTAIN statement locates a record and moves the datastatement locates a record and moves the data associated with the record to the record buffers.associated with the record to the record buffers. Because the FIND and OBTAIN commandBecause the FIND and OBTAIN command statements have identical formats, they arestatements have identical formats, they are discussed together. The six formats of thediscussed together. The six formats of the FIND/OBTAIN statement are as follows:FIND/OBTAIN statement are as follows:
  • 37. 09/06/16 37M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN  FIND/OBTAIN CALCFIND/OBTAIN CALC accesses a record occurrence by usingaccesses a record occurrence by using its CALC key value.its CALC key value.  FIND/OBTAIN CURRENTFIND/OBTAIN CURRENT accesses a record occurrence byaccesses a record occurrence by using established currencies.using established currencies.  FIND/OBTAIN DB-KEYFIND/OBTAIN DB-KEY accesses a record occurrence byaccesses a record occurrence by using its database key.using its database key.  FIND/OBTAIN OWNERFIND/OBTAIN OWNER accesses the owner record of a setaccesses the owner record of a set occurrence.occurrence.  FIND/OBTAIN WITHIN SET USING SORT KEYFIND/OBTAIN WITHIN SET USING SORT KEY accesses a record occurrence in a sorted set by using its sort keyaccesses a record occurrence in a sorted set by using its sort key value.value.  FIND/OBTAIN WITHIN SET/AREAFIND/OBTAIN WITHIN SET/AREA accesses a recordaccesses a record occurrence based on its logical location within a set or on itsoccurrence based on its logical location within a set or on its physical location within an area.physical location within an area.
  • 38. 09/06/16 38M Sliming COBOL Commands -COBOL Commands - FIND / OBTAINFIND / OBTAIN Formats:Formats:  FIND / OBTAIN CALCFIND / OBTAIN CALC record-namerecord-name ..  FIND / OBTAIN CURRENT {FIND / OBTAIN CURRENT { record-namerecord-name } .} . {WITHIN{WITHIN set-nameset-name }} {WITHIN{WITHIN area-namearea-name }}  FIND / OBTAIN DB-KEY ISFIND / OBTAIN DB-KEY IS db-keydb-key ..  FIND / OBTAIN OWNER WITHINFIND / OBTAIN OWNER WITHIN set-nameset-name ..  FIND / OBTAINFIND / OBTAIN record-namerecord-name WITHINWITHIN set-nameset-name USINGUSING sort-keysort-key..  FIND / OBTAIN {NEXT} { } WITHIN { set-name } .FIND / OBTAIN {NEXT} { } WITHIN { set-name } . {PRIOR} {{PRIOR} {record-name } { area-name } {FIRST} {LAST} {seq-nbr}
  • 39. 09/06/16 39M Sliming COBOL Commands -COBOL Commands - FINISHFINISH  Causes affected database sessions to terminate.Causes affected database sessions to terminate.  Format:Format: FINISH .FINISH .
  • 40. 09/06/16 40M Sliming COBOL Commands -COBOL Commands - IFIF  The IF statement allows the program to test for theThe IF statement allows the program to test for the presence of member record occurrences in a set and topresence of member record occurrences in a set and to determine the membership status of a recorddetermine the membership status of a record occurrence in a specified set; once the set has beenoccurrence in a specified set; once the set has been evaluated, the IF statement specifies further actionevaluated, the IF statement specifies further action based on the outcome of the evaluation. For example,based on the outcome of the evaluation. For example, an IF statement might be used to determine whether aan IF statement might be used to determine whether a set occurrence is empty and, if it is empty, to erase theset occurrence is empty and, if it is empty, to erase the owner record.owner record.  Note: DML IF statements cannot be nested within COBOL IF statements.
  • 41. 09/06/16 41M Sliming COBOL Commands -COBOL Commands - IFIF  Depending on its format, the IF statement uses set or run-unit currency. The object set occurrence of an IF statement is determined by the owner of the current record of the named set; the object record occurrence is determined by the current of run unit.  Each IF statement contains a conditional phrase and an imperative statement. When an IF is issued, the precompiler first generates a call to the DBMS to execute the conditional phrase; the results of the test determine whether or not the imperative statement is executed.
  • 42. 09/06/16 42M Sliming COBOL Commands -COBOL Commands - IFIF Formats:Formats:  IFIF set-nameset-name EMPTYEMPTY imperative-statementimperative-statement ..  IFIF set-nameset-name NOT EMPTYNOT EMPTY imperative-statement ..  IFIF set-nameset-name MEMBERMEMBER imperative-statementimperative-statement ..  IF NOTIF NOT set-nameset-name MEMBERMEMBER imperative-statementimperative-statement ..
  • 43. 09/06/16 43M Sliming COBOL Commands -COBOL Commands - ModifyModify  Replaces the contents of a database record occurrenceReplaces the contents of a database record occurrence with the values in it’s corresponding variable storage.with the values in it’s corresponding variable storage. Note: The database record being modified, mustNote: The database record being modified, must always be current of run-unit.always be current of run-unit.  Format:Format: MODIFYMODIFY record-namerecord-name ..
  • 44. 09/06/16 44M Sliming COBOL Commands -COBOL Commands - READYREADY  Prepares a database area for access by DML functions and specifies that area's usage mode.  Format: READY { } USAGE-MODE {UPDATE } .READY { } USAGE-MODE {UPDATE } . {{ area-namearea-name } {RETRIEVAL}} {RETRIEVAL}
  • 45. 09/06/16 45M Sliming COBOL Commands -COBOL Commands - ROLLBACKROLLBACK  Rolls back uncommitted changes made to the databaseRolls back uncommitted changes made to the database through an individual run unit.through an individual run unit.  Format:Format: ROLLBACK { CONTINUE } .ROLLBACK { CONTINUE } .  The CONTINUE option allows the run-unit to remainThe CONTINUE option allows the run-unit to remain active after the changes have been backed out.active after the changes have been backed out. Database access can be resumed without issuing BINDDatabase access can be resumed without issuing BIND and READY statements.and READY statements.
  • 46. 09/06/16 46M Sliming ERROR HANDLINGERROR HANDLING  After each IDMS command executes, a value isAfter each IDMS command executes, a value is returned into a field called ERROR-STATUS which isreturned into a field called ERROR-STATUS which is ‘0000’ if the command was successful, or a 4-byte value‘0000’ if the command was successful, or a 4-byte value indicating the command in error and the reason for theindicating the command in error and the reason for the error. The first two bytes of ERROR-STATUSerror. The first two bytes of ERROR-STATUS indicate the command and the last two bytes indicateindicate the command and the last two bytes indicate the cause of the error.the cause of the error.  Every IDMS error should be trapped and theEvery IDMS error should be trapped and the appropriate action should be taken. This action may beappropriate action should be taken. This action may be an error message or an Abort of the programan error message or an Abort of the program depending on the severity of the error.depending on the severity of the error.  A list of these error status codes can be found inA list of these error status codes can be found in Volume 4, Chapter 11 of the ‘IDMS Messages andVolume 4, Chapter 11 of the ‘IDMS Messages and Codes’ manuals.Codes’ manuals.
  • 47. 09/06/16 47M Sliming ERROR HANDLINGERROR HANDLING Component Major code DML functionComponent Major code DML function  00 Any DML function00 Any DML function  01 FINISH01 FINISH  02 ERASE02 ERASE  03 FIND/OBTAIN03 FIND/OBTAIN  05 GET05 GET  06 KEEP06 KEEP  07 CONNECT07 CONNECT  08 MODIFY08 MODIFY  09 READY09 READY  11 DISCONNECT11 DISCONNECT  12 STORE12 STORE  14 BIND14 BIND  15 ACCEPT15 ACCEPT  16 IF16 IF  17 RETURN17 RETURN  18 COMMIT18 COMMIT  19 ROLLBACK19 ROLLBACK  20 LRF requests20 LRF requests
  • 48. 09/06/16 48M Sliming Central Version / Local ModeCentral Version / Local Mode  CENTRAL VERSIONCENTRAL VERSION is an IDMS system that enablesis an IDMS system that enables multiple applications to access the database concurrently. Amultiple applications to access the database concurrently. A central version controls access to data at the individual recordcentral version controls access to data at the individual record (or row) level thus providing integrity while maximizing(or row) level thus providing integrity while maximizing concurrency. It also provides automatic recovery in the event ofconcurrency. It also provides automatic recovery in the event of failure. All applications executing within a TP monitorfailure. All applications executing within a TP monitor (including DC/UCF) use central version services to access(including DC/UCF) use central version services to access IDMS data. Batch applications can access data in centralIDMS data. Batch applications can access data in central version or local mode.version or local mode.  LOCAL MODELOCAL MODE is a mode of operation in which a batchis a mode of operation in which a batch program uses a dedicated copy DBMS to access the database.program uses a dedicated copy DBMS to access the database. In local mode, only one program can update the database at aIn local mode, only one program can update the database at a time. Updates in local mode are usually rare and only donetime. Updates in local mode are usually rare and only done when it is faster to back of the database, run the update programwhen it is faster to back of the database, run the update program and restore in the event of an abend than running under Centraland restore in the event of an abend than running under Central Version.Version.
  • 49. 09/06/16 49M Sliming Central Version / Local ModeCentral Version / Local Mode
  • 50. 09/06/16 50M Sliming CulpritCulprit Advantage CA-Culprit is a batch utility that generates reports from conventional and database files. Data Input: As shown in the diagram on the following page, Advantage CA-Culprit can extract data from several database and conventional file structures. As many as 32 conventional files can be read and processed in one Advantage CA-Culprit run. Each run can generate up to 100 reports from the same input data. Reports can be formatted as printed output, stored tables, or written to cards, tape, or disk. The diagram shows The Advantage CA-Culprit Data Access and Transfer Network. Advantage CA-Culprit can extract data from and write reports to several database and file structures. Advantage CA-Culprit is fully integrated with other products, such as Advantage CA-IDMS/DB, the Integrated Data Dictionary (IDD), and CA-ICMS.
  • 52. 09/06/16 52M Sliming CulpritCulprit Sample program to list Service Office Address History for a Provider:Sample program to list Service Office Address History for a Provider: DATABASE DICTNAME=DICT05DATABASE DICTNAME=DICT05 IN DB SS=DPU001IN DB SS=DPU001 PATHAA DPR-PROVSVOFC DPR-ADDRHISTPATHAA DPR-PROVSVOFC DPR-ADDRHIST 01OUT 132 1330 D PS(3375) DD=SYS036,36 LT=S01OUT 132 1330 D PS(3375) DD=SYS036,36 LT=S 0151*010 339-BILL-PROV-ID-NBR SZ=60151*010 339-BILL-PROV-ID-NBR SZ=6 0151*020 339-SERVICE-OFC-NBR SZ=20151*020 339-SERVICE-OFC-NBR SZ=2 0151*030 364-SERVICE-OFC-ADDR-GRP SZ=790151*030 364-SERVICE-OFC-ADDR-GRP SZ=79 0151*040 364-SVCOFC-STATUS-CODE SZ=10151*040 364-SVCOFC-STATUS-CODE SZ=1 0151*050 364-SVCOFC-ADDR-EFFDATE-FULL SZ=80151*050 364-SVCOFC-ADDR-EFFDATE-FULL SZ=8 0151*060 364-SVCOFC-ADDR-ENDDATE-FULL SZ=80151*060 364-SVCOFC-ADDR-ENDDATE-FULL SZ=8 0151*070 364-SVCOFC-PROVL-DATE-TIME SZ=140151*070 364-SVCOFC-PROVL-DATE-TIME SZ=14 017 IF 339-BILL-PROV-ID-NBR = 'B20000' 010017 IF 339-BILL-PROV-ID-NBR = 'B20000' 010 017 DROP017 DROP 017010 TAKE017010 TAKE
  • 53. 09/06/16 53M Sliming CulpritCulprit Output from Sample program:Output from Sample program: B20000 52 7117 DAWN VIEW CT SUITE 5225 CITRUS HEIGHTS CA956100000C20 C 20040910 20040910 20040910140146B20000 52 7117 DAWN VIEW CT SUITE 5225 CITRUS HEIGHTS CA956100000C20 C 20040910 20040910 20040910140146 B20000 52 11432123N VIEW CT SUITE CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135446B20000 52 11432123N VIEW CT SUITE CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135446 B20000 52 11432123N VIEW CT CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135041B20000 52 11432123N VIEW CT CITRUS HEIGHTS CA956100000C20 C 20040901 20040910 20040910135041 B20000 52 7117 DAWN VIEW CT CITRUS HEIGHTS CA956100000A20 A 20040828 20040910 20040910124434B20000 52 7117 DAWN VIEW CT CITRUS HEIGHTS CA956100000A20 A 20040828 20040910 20040910124434 B20000 56 NEW ADDRESS DIAMOND SPRINGS CA956190000A20 A 20050801 20050830 20050826105313B20000 56 NEW ADDRESS DIAMOND SPRINGS CA956190000A20 A 20050801 20050830 20050826105313 B20000 47 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000C20 C 20041001 20041005 20041005100933B20000 47 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000C20 C 20041001 20041005 20041005100933 B20000 30 7117 NEW ADDRESS CITRUS HEIGHTS CA956213501C20 C 20050829 20050829 20050829143219B20000 30 7117 NEW ADDRESS CITRUS HEIGHTS CA956213501C20 C 20050829 20050829 20050829143219 B20000 54 75 CH CA956100000A20 A 20040901 20040907 20040907150639B20000 54 75 CH CA956100000A20 A 20040901 20040907 20040907150639 B20000 55 TEST ADDRESSS TT CITY CA956100000C20 C 20030901 20040830 20041026154158B20000 55 TEST ADDRESSS TT CITY CA956100000C20 C 20030901 20040830 20041026154158 B20000 55 TEST ADDRESSS CITY CA956100000A20 A 20040901 20041026 20040923141317B20000 55 TEST ADDRESSS CITY CA956100000A20 A 20040901 20041026 20040923141317 B20000 50 785 CH CA956100000A20 A 20040701 20041005 20040830143345B20000 50 785 CH CA956100000A20 A 20040701 20041005 20040830143345 B20000 48 12123 DH CA956100000C20 C 20041002 20041005 20041005101456B20000 48 12123 DH CA956100000C20 C 20041002 20041005 20041005101456 B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20060316 20060328111055B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20060316 20060328111055 B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20040901 20040910 20040907150441B20000 5 7117 DAWN VIEW CT CITRUS HEIGHTS CA956284011C20 C 20040901 20040910 20040907150441 B20000 5 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956284011C20 C 20040828 20040907 20040907132818B20000 5 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956284011C20 C 20040828 20040907 20040907132818 B20000 53 75 X CH CA956100000C20 C 20041001 20041005 20041005101533B20000 53 75 X CH CA956100000C20 C 20041001 20041005 20041005101533 B20000 53 75 CH CA956100000A20 A 20040401 20041005 20040901155604B20000 53 75 CH CA956100000A20 A 20040401 20041005 20040901155604 B20000 1 5555555555555ET PLACERVILLE CA956213501C20 C 20060314 20060315113330B20000 1 5555555555555ET PLACERVILLE CA956213501C20 C 20060314 20060315113330 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060308 20060315 20060309113516B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060308 20060315 20060309113516 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060207 20060216 20060207161221B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060207 20060216 20060207161221 B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060205 20060207 20060206131043B20000 1 555 MAIN STREET PLACERVILLE CA956213501C20 C 20060205 20060207 20060206131043 B20000 1 555 MAIN STREET PO BOX 5 PLACERVILLE CA956213501C20 C 20040830 20041207 20040901160019B20000 1 555 MAIN STREET PO BOX 5 PLACERVILLE CA956213501C20 C 20040830 20041207 20040901160019 B20000 46 DD X CC CA956100000C20 C 20041001 20041005 20041005101738B20000 46 DD X CC CA956100000C20 C 20041001 20041005 20041005101738 B20000 51 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000A20 A 20040828 20041005 20040831153728B20000 51 7505 SYLVAN VALLEY WAY CITRUS HEIGHTS CA956100000A20 A 20040828 20041005 20040831153728
  • 54. 09/06/16 54M Sliming CulpritCulprit ADDITIONAL INFORMATIONADDITIONAL INFORMATION G:SYSGRPIDMS R16 ManualsIDMS Manuals – PDFB01287-1EG:SYSGRPIDMS R16 ManualsIDMS Manuals – PDFB01287-1E TSO DATASETS:TSO DATASETS:  DLST.CULP.SOURCEDLST.CULP.SOURCE  DLST.CULP.JCLDLST.CULP.JCL  DLST.CULP.PROCDLST.CULP.PROC
  • 55. 09/06/16 55M Sliming SQLSQL  With the SQL feature, non-SQL defined IDMSWith the SQL feature, non-SQL defined IDMS databases can be accessed using SQL DML (IDMSdatabases can be accessed using SQL DML (IDMS version of SQL). This is done by either using theversion of SQL). This is done by either using the Online Command Facility (OCF) or the batch programOnline Command Facility (OCF) or the batch program IDMSBCF.IDMSBCF.  An SQL schema is created which maps to that of theAn SQL schema is created which maps to that of the non-SQL IDMS database.non-SQL IDMS database.  Records defined in the non-SQL schema can then be accessed as tables in SQL.  The following page show an example of executing aThe following page show an example of executing a SELECT statement using OCF.SELECT statement using OCF.
  • 57. 09/06/16 57M Sliming Additional Information / SourcesAdditional Information / Sources  List of manuals and file names located on G:List of manuals and file names located on G: drive at: G:SYSGRPIDMS R16 Manualsdrive at: G:SYSGRPIDMS R16 Manuals  Glossary: B01251-1EGlossary: B01251-1E  DML Reference – COBOL: B01247-1EDML Reference – COBOL: B01247-1E  Messages and Codes – Volume 4: B01259-2EMessages and Codes – Volume 4: B01259-2E  SQL Option Self-Training Guide B01274-1ESQL Option Self-Training Guide B01274-1E  G:SYSGRP2006 IUA WorkshopG:SYSGRP2006 IUA Workshop  CDMMIS Schema Definition:CDMMIS Schema Definition: DDLST.IDMS.RPTS(CV5SCHEM)LST.IDMS.RPTS(CV5SCHEM)