Modernizing the CA Datacom Data – SQL Access Part I

World®’16

ModernizingtheCADatacom®Data– SQLAccessPartIKevinShuma,VPProductManagementCATechnologies

MFX95SA

MAINFRAMEANDWORKLOADAUTOMATION

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Abstract

ThisisatwopartsessionthatprovidesanoverviewofstepsnecessarytotakemakeCADatacom®availableformodernapplicationsviaSQLandserver.

FormanyshopstheirCADatacom®/DBenvironmentwascreatedbeforetheimplementationofSQL.ThissessionwillwalkthroughthestepsnecessarytomakeallthetheirdataSQLaccessibleusingCADatacom®SQL.FromthereweaddtheODBCandJDBCsupportprovidedbyCADatacom®server.Oncecompletedyouwillhavedatathatisfullyaccessibletomodernapplicationsdevelopmentenvironments.

KevinShuma

CATechnologiesVP,ProductManagement


Agenda

WHYSHOULDWEIMPLEMENTSQL?

IMPLEMENTINGSQLACCESS

LEGACYDATASTRUCTURES

SQLCOLUMNREPORT

SUMMARY

1

2

3

4

5


WhyshouldweimplementSQL?

§ SQLprovidesthebasicaccesspointformodernapplications– ODBC/JDBCuseSQLunderthecovers

§ ImplementingSQLaccessontraditionaldata– Opensupcriticalbusinessdatatonewapplicationsandbusiness

functions– Doesnotinterferewithexistingtraditionalapplications

§ Peacefulcoexistenceismuchpreferredtorevolutionarychange(rewrites)

§ ImplementingSQLconstraintsontraditionaldata– Allowsbusinessrulestobeenforcedwithoutrequiringadditionalcoding

ModernizationistheKeytoGrowthinToday’sWorld


CADatacom®SQLandCADatacom®Server

CADatacomdataandbusiness

logicWeband

ApplicationServers

Webandmobileapps

ModernizationWithCoexistence

Batch

Traditionalapps


ImplementingSQL- AUTHIDs

§ AUTHIDsmustbeaddingtothesystembeforetheycanbeusedintablereferences

§ DefaultAUTHIDsprovidedwithDatacom– SYSADM(systemtables)– SYSUSR(defaultforusertables)

§ WerecommendthattheuserdefinemeaningfulAUTHIDsfortheirenvironment– user_authid (18characteruserspecifiedname)

CreatingtheSystemLevelSchemas- AUTHIDs


ImplementingSQL- AUTHIDs(Cont’d)CreatingtheSystemLevelSchemas- AUTHIDs

DBID AUTHID0100 DB01000200 DB02001294 DB1294

• UsinganAUTHIDthattiestobusinessfunctionmaymakeiteasiertogroupthetables

• AllSQLtablenamemustbeuniquewithAUTHID

• WithmultipleDBIDsperAUTHIDbecarefulwhenassigningSQLtablenames

AUTHID BusinessFunction DBID Table

PAYROLL Payroll 0100 All

VENDOR Accounts payable 0200 VND,VNA,VN3

INVENTORY Sales andordering 03000400

INV,ITM,DTLORD,ODL,ITM

• CADatacomalreadyrequires3charactertablenamestobeuniquewithinDBID• InthisexampleweareusingtheDBIDaspartoftheAUTHIDasasimpledefault• MakesitrelativelysimpleforexistinguserstoremembertheAUTHID


ImplementingSQL- AUTHIDs(Cont’d)

§ AUTHIDscanbeaddedtothesystemthroughvariousutilities– Theyonlyneedtobedefinedonceperenvironment(MUF)

CreatingtheSystemLevelSchemas- AUTHIDs

Datadictionarybatch Datadictionaryonline SQLstatement


ImplementingSQL– DatabaseModelAddingSQLNamestotheDatabaseModelinPRODStatus

DDEntity

Attribute Req. Values Default Status Comment

Schema AUTHID No 18Character No ADDCPYPROD

Mustbedefinedin PRODbeforeusingfortables

Database SQL-Security

No YorN N UPDPROD

Use defaultorsettoN,Useexternalsecurity

SQL-NAME N/A 32Character None UPDPROD

Usedfordocumentationonly

Area SQL-Name No 32Character None UPDPROD

NeededifaddingnewtablesviaDDL(CREATE TABLE…IN…)


ImplementingSQL– DatabaseModel(Cont’d)AddingSQLNamestotheDatabaseModelinPRODStatus

DDEntity

Attribute Req.

Values Default Status Comment

Table SQL-Intent Yes N,YorR N UPDPROD

UseYforfullSQLaccessUseRforSQLreadaccessonly

AUTHID Yes ExistingAUTHID

None UPDPROD

Mustbealready defined

SQL-Name YES 32Character None UPDPROD

Mustbedefinedto accesstablewithSQL

Key AUTHID N/A Assigned totablevalue

auto UPDPROD

Automaticallyassigned

SQL-Name NO 32Character None UPDPROD

Mustbedefinedto accessindexwithSQL(ALTERorDROP)


ImplementingSQL– DatabaseModel(Cont’d)AddingSQLNamestotheDatabaseModelinPRODStatus

DDEntity

Attribute Req. Values Default Status Comment

Column AUTHID N/A Assigned totablevalue

auto UPDPROD


SQL-Name NO 32Character Generated UPDPROD

Generatedusingexistingcolumnname

Column AUTHID N/A Assigned totablevalue

auto UPDPROD


SQL-Name NO 32Character Userspecified

UPDTestCPY PROD

UserwantsspecificSQLname

Userspecifiednameforcolumnrequiresextrasteps


SampleDDUPDATEJobtoAddSQLAttributes

UpdateSQLattributesinPRODstatus

CatalogPRODtoCXXandDDD


MakingtheSQLAttributes“Live”

§ SQLattributesaresetthroughDatadictionaryprocesses– SQLattributesmadeusableduringtheCXXCATALOG

§ SQLdefinitionsarestoredintheDDD§ Only“active/production”definitionsareinDDD

UpdateTABLECopytoPROD

DDUPDATE

MUF

DD0002

Catalog DDUPDATE

MUF

DD0002

CXX

DDD0015


LegacyDataStructures

§ Legacydatastructuresmayhavesome“SQL”accesslimits– Alltablesareaccessible,butthecontentaccessmaybelimited

§ SQLaccessibilitytolegacytabledefinitions– GroupfieldsareignoredbySQL

§ Onlyelementaryfieldsareviewable– 2nd redefinitioncolumnsarenotaccessible

§ Onlythefirstsetofcolumndefinitionsareviewable;anythingaftertheREDEFINEisignored

– Elementsofrepeatinggroupsarenotdistinguishable§ Repeatinggroup(array)isrepresentedasasinglecharactercolumn

MayHaveBeenBuiltUsingOlderDataStructures(VSAM,COBOLCopybooks)


SQLColumnReport

§ Canbeexecutedagainstanyexistingtable– RegardlessofSQL-INTENTsetting– CanbeusedtopreviewSQLaccessibility

QuickWaytoDetermineHowSQLAccessibleLegacyTableDefinitionsAre


SQLColumnReport(Cont’d)QuickWaytoDetermineHowSQLAccessibleLegacyTableDefinitionsAre


SQLColumnReport(Cont’d)SQLACCESSSTD.- ShowsCurrentSQLAccessibility

STD– indicatesifcolumnisaccessiblebystandardSQL

NO- willincludereasondataisnotaccessible• CMP– columnisacompound

(group)field• RPT– Columnisarepeating

field• RDF– Columisaredefinition

(2nd definition)


ExperiencesSQLColumnreportprovidesadetailedreportshowingSQLcolumnaccessibilityforanytable.

KeyTopicsAddingSQLaccessibilitytoexistingtableswillallownewmodernapplicationstobecreatedthatpeacefullycoexistwithexistinglegacyapplications.

FindingsItisasimpleprocesstomakeanexistingtableSQLaccessible.

SummaryPartI


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MFX99S BirdsofaFeather/StumptheTechie! 11/17/2016at3:45pm


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Modernizing the CA Datacom Data – SQL Access Part I