201011 FUN How to Access DB2 Efficiently From FOCUS

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How to Access DB2 Efficiently from FOCUS

Michelle Cavanaugh

Information Builders Summit 2010 User Conference

June 2010


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Introduction & Level Set Basic FOCUS/DB2 Steps DB2 Optimization Steps Traces How to Optimize FOCUS/DB2

Code Examples Q & A’s

Agenda

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CIGNA Corporation is…

“An employee benefits company uniquely positioned to help companies succeed and help people enjoy a better quality of life.”

Disclaimer:

The opinions and conclusions expressed are those of the speaker and not those of CIGNA Corporation.


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Me: Installation Troubleshooting Optimization

Hardware: 3 IBM z10’s 5 Complexes/Groups 15 LPARs (Logical PARtitions)

Software: OS: z/OS 1.10 & 1.11 DB2: 27 SSIDs

- V8 New Function Mode (NFM)- V9 Conversion Mode (CM) & NFM

FOCUS:7.3.1 - Production & 7.6.10 - Test

Introductions & Level Set

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Basic FOCUS/DB2 Processing

FOCUS calls requested module (TABLE, GRAPH) Reads & Parses MFD Parses the request (FOCEXEC) Calls the FOCUS/DB2 Interface

1. FOCUS

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2. FOCUS/DB2 Interface

Reads & Parses the AFD Checks for Optimization – System Level Analyzes & Optimizes the request Creates SELECT statements Prepares, allocates & opens cursors Calls DB2 to FETCH the rows of data

3. DB2

Analyzes & Optimizes the passed SQL Chooses the access path & retrieval method Retrieves data Creates answer set

FOCUS

FOCUS/DB2Interface

DB2


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Basic FOCUS/DB2 Processing

DB2 sends 1 row of data or a SQL status message to FOCUS

Converts non-standard data into FOCUS formats FOCUS processes are done (IF/WHERE, DEFINEs, etc.) Puts valid rows into the FOCUS Internal Matrix Loops back to get the next row of the DB2 answer set

This continues until the end of the answer set –

SQL code 100+ (End)

4. FOCUS/DB2 Interface

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5. FOCUS

Processes the Internal Matrix The report is displayed

FOCUS

FOCUS/DB2Interface

DB2


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FOCUS/DB2 Optimization

1. Projection & Record Selection – Always Done

2. JOINs

3. SORTs

4. Aggregation - When Required

If your code does not pass these steps, your request is not optimized

Optimization Order

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Projection – Specific columns only – SELECT PRINT/SUM/COUNT Fields Objects of JOINs & DEFINEs PRINT * - All columns in Master – Never a SELECT *

Record Selection – SQL WHERE DEFINEs – Within a Single Segment YMD or YYMD Date Fields LIKEs - With Same Length or Wildcards (%)*

WHERE (T1.<Field> LIKE ‘<Value>’)

* If different lengths or no wildcards WHERE (T1.<Field> = ‘<value>’)

1. Projection & Record Selection – Translates FOCUS to SQL

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JOIN is Optimized: Single SELECT Statement One DB2 Subsystem (SSID) AFD has KEYS >0 Less than 15 TABLEs in a Single JOIN

JOIN Optimized = JOIN Order does not matter

JOIN is Not Optimized: FOCUS-Managed JOIN Multiple DB2 Subsystems (SSID) MASTER contains an OCCURS DB2 to Fix files

JOIN is NOT Optimized = JOIN Order Critical

If JOINs Optimizes SORTs are checked

2. JOIN Optimization

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3. SORT Optimization

SORT is Optimized: SQL ORDER BY SORT on REAL fields SORT on COMPUTE fields before DEFINE fields With FST. & LST. – MFD/AFD KEYs must be correct

SORT is Not Optimized if: JOIN was not Optimized Multi-Verb Request ACROSS’s, RETYPE’s, & COMPUTE’s that use Direct Operators Direct Operators that require the Internal Matrix (e.g. TOT.PCT. or RPCT.)

If SORT Optimizes Aggregates are checked


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Why? DB2 is much better at aggregation Less data returned to FOCUS Less Data = Faster FOCUS Processing

Aggregates that are Translated to SQL: Verbs (SUM, COUNT & WRITE) Direct Operators: MIN. MAX. AVE. Most DEFINE fields

- Constant fields using CNT.- Expressions that return with an arithmetic or character string

value

Aggregates that DO NOT get Translated to SQL: COUNT with MISSING=ON Multi-verb Requests

Aggregation can be turned off via the following command:SQL <engine> SET OPTIMIZATION NO AGGR

4. Aggregation Optimization – Optional

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Trace Facility

1. STMTRACE – Statement Trace

2. SQLAGGR – SQL Aggregate Trace

3. SQLDI – SQL Details Trace

4. SQLCALL – See All Trace

Available Traces

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Trace Facility

All SQL & DDL code All generated SQL code – SELECTs & WHEREs All SQL Data Definition Language (DDL) for CREATEs Output can be saved & Run in native SQL

Pre- FOCUS 7.2 = FSTRACE4

1. STMTRACE

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2. SQLAGGR

JOIN, SORT & Aggregate Optimization Analysis Last optimization level completed

Best = “AGGREGATION DONE…”

Pre-FOCUS 7.2 = FSTRACE3


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Trace Facility

Shows All the details SQL Statements DB2 Return Codes (RC) COMMIT & ROLLBACK Commands SQL Cursor Operations Works with ALL FOCUS Requests

Pre-FOCUS 7.2 = FSTRACE

3. SQLDI

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4. SQLCALL

Shows All Commands & Data exchange between

Physical & Logical Layers of the Data Adaptor

New with FOCUS 7.2


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Basic Steps to Optimize FOCUS/DB2 Code

1. Set up Job for Traces

2. Restrict Record Retrieval

3. Pick your Trace Levels

4. Activate Selected Traces

5. Review Trace Output – Optimization Levels & SQL Code

Did you make it to “AGGREGATION DONE…”?

If not – Modify your FOCUS code and try again

Optimization Steps:

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Optimization Steps

Setup Trace file – FSTRACE

Pre-Allocate FSTRACE & Reference in FOCUS JCL:

//FSTRACE DD DSN=<file name>,// DCB=(LRECL=80,BLKSIZE=80,RECFM=F),// VOL=SER=<pack name>,SPACE=(CYL,(1,5,5)),// DISP=(NEW,CATLG,DELETE),UNIT=SYSALLDA

And in your job...

//FSTRACE DD DSN=<file name>,DISP=SHR

SYSOUT:

//FSTRACE DD SYSOUT=*, DCB=(LRECL=80, BLKSIZE=80,RECFM=F)

1. Setup Job for Traces

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Optimization Steps

Eliminate Database Retrieval:

SET XRETRIEVAL = OFF

Limit the Number of Rows Being Read:

YES - IF READLIMIT EQ 100

NO - IF RECORDLIMIT EQ 100

2. Restrict Data Retrieval

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3. Pick Your Trace Levels

Recommended levels are:

STMTRACE & SQLAGGR

Use only if absolutely necessary:

SQLDI & SQLCALL


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Optimization Steps

Start the Trace Facility

SET TRACEUSER = ON

SET TRACEOFF = ALL

Activate the Requested Traces

SET TRACEON=SQLAGGR/DB2/FSTRACE

SET TRACEON=STMTRACE/DB2/FSTRACE

Check Trace Levels:

SET TRACEON = ?

Execute your FOCUS/DB2 request

4. Activate Selected Traces

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Optimization Steps

You should try for only one SELECT statement

There should be WHEREs

You should see “AGGREGATION DONE…”

If not – return to & try again!

5. Review Trace Output

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FOCUS/DB2 Example:Single TABLE

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FOCUS/DB2 Optimization - Setup

-* TURN OFF DATA RETRIEVAL SET XRETRIEVAL = OFF-* ACTIVATE THE TRACE FACILITY SET TRACEUSER=ON SET TRACEOFF=ALL -* ACTIVATE SPECIFIC TRACES SET TRACEON=SQLAGGR/DB2/FSTRACE SET TRACEON=STMTRACE/DB2/FSTRACE -* CHECK TRACE LEVEL SET TRACEON = ?

DB2OPT FOCEXEC

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DB2OPT JCL

Allocate all the Required FOCUS files and...//* ALLOCATE TRACE FILE //FSTRACE DD DSN=TEST.FOCUS.FSTRACE,DISP=SHR <- FSTRACE //*//SYSIN DD *EXEC DB2OPT <- Opt Set up EXEC <FOCEXEC to be optimized> FIN /* //


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FOCUS/DB2 Optimization – Single DB2 TABLE

MASTER File Description - MFD

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$$$ CREATED BY AUTODB2 ON 06/24/04 AT 11.47.33 BY XXXXFILENAME=HTRARGEL,SUFFIX=SQLDS,$SEGNAME='ARGUS_EL',SEGTYPE=S0,$FIELD=CUST_NUM ,CUST_NUM ,A4 ,A4 ,MISSING=OFF,$FIELD=CLNT_NUM ,CLNT_NUM ,A4 ,A4 ,MISSING=OFF,$FIELD=HMO_CD ,HMO_CD ,A3 ,A3 ,MISSING=OFF,$FIELD=MBR_END_DT ,MBR_END_DT ,A10 ,A10 ,MISSING=OFF,$ MANY MORE FIELDS...

Access File Description - AFD

$$$ CREATED BY AUTODB2 ON 06/24/04 AT 11.47.33 BY XXXX $$$ FILENAME=HTRARGEL,SUFFIX=SQLDS,$

SEGNAME='ARGUS_EL', TABLENAME='"WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY"',KEYS=04,WRITE=YES,KEYORDER=LOW,$


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FOCEXEC

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-SET &THISYY=EDIT(&DATEYYMD,'9999$$$$$$'); <- Date Setup

-SET &ENDYY=(&THISYY - 2);-SET &THISMM=EDIT(&DATEYYMD,'$$$$$01$$$');-SET &THISDD=EDIT(&DATEYYMD,'$$$$$$$$01');-SET &ENDDT8=(&ENDYY | &THISMM | &THISDD);-SET &ENDDT=EDIT(&ENDDT8,'9999-$01-$01');-* DEFINE FILE HTRARGEL

<- DEFINEs ACCT/A4 = EDIT(SUBACT_NO,'9999$$');TOSS3501/A1 = IF HMO_CD EQ '200' THEN 'Y' ELSE 'N';TOSS3502/A1 = IF ACCT FROM '0400' TO '0499' THEN 'Y' ELSE IF ACCT FROM '4800' TO '4999' THEN 'Y' ELSE 'N'; TOSS3503/A2 = TOSS3501|TOSS3502;TOSS350/A1 = IF TOSS3503 EQ 'YY' THEN 'Y' ELSE 'N';END -* TABLE FILE HTRARGEL <- TABLE RequestPRINT CUST_NUM CLNT_NUM HMO_CD SUBACT_NO MBR_END_DTIF CUST_NUM EQ '9999' IF CLNT_NUM NE '9999' IF TOSS350 EQ ‘Y'IF MBR_END_DT GE '&ENDDT' END


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FSTRACE Output

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(FOC2598) FOCUS IF/WHERE TEST CANNOT BE PASSED TO SQL : TOSS350 (FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2596) ONE OR MORE EXPRESSION(S) CAN NOT BE TRANSLATED TO SQL SELECT T1."CUST_NUM",T1."CLNT_NUM",T1."HMO_CD",T1."SUBACT_NO", T1."MBR_END_DT" FROM "WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY" T1 WHERE (T1."MBR_END_DT" >= '2008-01-01') AND (T1."CLNT_NUM" <> '9999') AND (T1."CUST_NUM" = '9999') FOR FETCH ONLY;

FSTRACE Translation

Record Selection Failed:(FOC2598) FOCUS IF/WHERE TEST CANNOT BE PASSED TO SQL : TOSS350

Aggregation Failed:(FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2596) ONE OR MORE EXPRESSION(S) CAN NOT BE TRANSLATED TO SQL

The SET’s Passed: WHERE (T1."MBR_END_DT" >= '2008-01-01')


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Original FOCEXEC

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DEFINE FILE HTRARGEL <- DEFINEs

ACCT/A4 = EDIT(SUBACT_NO,'9999$$');TOSS3501/A1 = IF HMO_CD EQ '200' THEN 'Y' ELSE 'N';TOSS3502/A1 = IF ACCT FROM '0400' TO '0499' THEN 'Y' ELSE IF ACCT FROM '4800' TO '4999' THEN 'Y' ELSE 'N'; TOSS3503/A2 = TOSS3501|TOSS3502;TOSS350/A1 = IF TOSS3503 EQ 'YY' THEN 'Y' ELSE 'N';END -* TABLE FILE HTRARGEL <- TABLEPRINT CUST_NUM CLNT_NUM HMO_CD SUBACT_NO MBR_END_DTIF CUST_NUM EQ '9999' IF CLNT_NUM NE '9999' IF TOSS350 EQ ‘Y‘ FIELD not translated to SQLIF MBR_END_DT GE '&ENDDT' END


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Modified FOCEXEC

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DEFINE FILE HTRARGEL

ACCT/A4 = EDIT(SUBACT_NO,'9999$$'); END -* TABLE FILE HTRARGEL PRINTCUST_NUM CLNT_NUM HMO_CD SUBACT_NO MBR_END_DT IF CUST_NUM EQ '9999'IF CLNT_NUM NE '9999'-* CHANGE THE DEFINE TO A WHEREWHERE (HMO_CD EQ '200') AND ((ACCT FROM '0400' TO '0499') OR (ACCT FROM '4800' TO

'4999'))IF MBR_END_DT GE '&ENDDT'

END

Changes:

Convert DEFINEs to WHEREs Make sure that you are using REAL fields


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FSTRACE Output

(FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2594) AGGREGATION IS NOT APPLICABLE TO THE VERB USED SELECT T1."CUST_NUM",T1."CLNT_NUM",T1."HMO_CD",T1."SUBACT_NO", T1."MBR_END_DT" FROM "WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY" T1 WHERE (T1."MBR_END_DT" >= '2008-01-01') AND (T1."HMO_CD" = '200') AND (T1."CLNT_NUM" <> '9999') AND (T1."CUST_NUM" = '9999') AND (((SUBSTR(T1."SUBACT_NO", 1, 4)) BETWEEN '0400' AND '0499') OR ((SUBSTR(T1."SUBACT_NO", 1, 4)) BETWEEN '4800' AND '4999')) FOR FETCH ONLY;


FOCUS/DB2 Example:Multiple TABLEs



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FOCUS/DB2 Optimization – Multiple DB2 TABLEs

JOIN NDC_NUM IN HTRACLM TO ALL NDC_NUM IN HTRNDC AS JOIN1ENDJOIN CUST_NUM AND CLNT_NUM AND MBR_NO IN HTRACLMTO CUST_NUM AND CLNT_NUM AND MBR_NO IN HTRARGEL AS JOIN2ENDJOIN CLM_NUM IN HTRACLM TO CLM_NUM IN HTRCLSTF AS JOIN3END

JOIN Code:

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Active JOINs:

? JOIN

JOINS CURRENTLY ACTIVE HOST CROSSREFERENCE

FIELD FILE TAG FIELD FILE TAG AS ALL WH----- ---- --- ----- ---- --- -- --- --NDC_NUM HTRACLM NDC_NUM HTRNDC JOIN1 Y N CUST_NUM HTRACLM CUST_NUM HTRARGEL JOIN2 N N CLM_NUM HTRACLM CLM_NUM HTRCLSTF JOIN3 N N


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JOIN Structure:

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HOST

JOIN1 JOIN2 JOIN3


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HOST - HTRACLM $$$ CREATED BY AUTODB2 ON 07/29/04 AT 07.38.29 BY XXXX $$$ FILENAME=HTRACLM,SUFFIX=SQLDS,$ SEGNAME='CLAIM',TABLENAME='"GHTR"."CLAIM"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN1 - HTRNDC $$$ CREATED BY AUTODB2 ON 09/28/04 AT 11.19.52 BY XXXX $$$ FILENAME=HTRNDC,SUFFIX=SQLDS,$ SEGNAME='NDC',TABLENAME='"GHTR"."NDC"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN2 - HTRARGE $$$ CREATED BY AUTODB2 ON 06/24/04 AT 11.47.33 BY XXXX $$$ FILENAME=HTRARGEL,SUFFIX=SQLDS,$ SEGNAME='ARGUS_EL', TABLENAME='"WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY"', KEYS=04,WRITE=YES,KEYORDER=LOW,$

JOIN3 - HTRCLSTFSEGNAME= HTRCLSTF ,TABLENAME= 'GHTR."CLAIM_STAFF"‘, KEYS= 1 ,WRITE= YES ,$

Access File Descriptions - AFDs

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SET ALL=PASS SET ALL

-* DEFINE FILE HTRACLM

DEFINEs INGRD_CST_AMT/P9.2=IF CLNT_INGRD_CST_AMT GT 0 THEN CLNT_INGRD_CST_AMT ELSE INGRD_CST_AMT ;DISP_FEE/D9.2=IF CLNT_INGRD_CST_AMT GT 0 THEN CLNT_DISP_FEE_AMT ELSE DISP_FEE_AMT ;TOT_PD_AMT/P9.2=IF CLNT_INGRD_CST_AMT GT 0 THEN CLNT_TOT_PD_AMT ELSE TOT_PD_AMT ;FILL/A10=EDIT(FILL_DT,'9999-99-99') ;PAID/A10=EDIT(PAID_DT,'9999-99-99') ;MBR_NO/A12=IF CUST_NUM NE '0215' THEN MBR_NO ELSE IF NEW_MBR_NO EQ ' ' THEN MBR_NO ELSE NEW_MBR_NO ;EMP_ID/A9=EDIT(MBR_NO,'999999999$$$') ;END-* TABLE FILE HTRACLM

TABLE RequestLIST MBR_NO EMP_ID FILL_DT PAID_DT RX_ACCT_NUM INGRD_CST_AMT DISP_FEE TOT_PD_AMT CUST_NUM CLNT_NUM BY CLM_NUM BY HIGHEST 1 ARGUS_RUN_DT WHERE RX_ACCT_NUM IN ('3209348') AND (PAID_DT GE '2013-01-01') AND (PAID_DT LT '2018-01-01') AND PLAN_OF_BEN IN ('COMP3') AND FUNDNG_SVC_CD EQ '2'ON TABLE HOLD AS HOLD2 END

Original FOCEXEC

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(FOC2510) FOCUS-MANAGED JOIN SELECTED FOR FOLLOWING REASON(S):

(FOC2519) THE JOINED SEGMENTS RESIDE IN MORE THAN ONE NODE OR SUBSYSTEM

(FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON:

(FOC2592) RDBMS-MANAGED JOIN HAS BEEN DISABLED SELECT T1."CLM_NUM",T1."CUST_NUM",T1."CLNT_NUM",

T1."RX_ACCT_NUM",T1."PLAN_OF_BEN",T1."MBR_NO",

T1."NABP_PHARMCY_NUM",T1."FILL_DT",T1."PAID_DT",

T1."COPAY_COIN_AMT",T1."INGRD_CST_AMT",T1."AWP_INGRD_CST_AMT",

T1."DISP_FEE_AMT",T1."SALES_TAX_AMT",T1."TOT_PD_AMT",

T1."UNC_AMT",T1."NEW_MBR_NO",T1."FUNDNG_SVC_CD" FROM

"GHTR"."CLAIM" T1 WHERE (T1."FUNDNG_SVC_CD" = '2') AND

(T1."PLAN_OF_BEN" = 'COMP3') AND (T1."PAID_DT" < '2011-01-01')

AND (T1."PAID_DT" >= '2006-01-01') AND (T1."RX_ACCT_NUM" =

'3209348') FOR FETCH ONLY;

SELECT T2."MBR_FRST_NM",T2."MBR_LAST_NM",T2."MBR_BRTH_DT",

T2."ARGUS_RUN_DT" FROM

"WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY" T2 WHERE

(T2."CUST_NUM" = ?) AND (T2."CLNT_NUM" = ?) AND (T2."MBR_NO" =

?) FOR FETCH ONLY;

SELECT T3."CLNT_INGRD_CST_AMT",T3."CLNT_DISP_FEE_AMT", T3."CLNT_TOT_PD_AMT" FROM GHTR."CLAIM_STAFF" T3 WHERE (T3."CLM_NUM" = ?) FOR FETCH ONLY;

FSTRACE Output - #1

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(FOC2519) THE JOINED SEGMENTS RESIDE IN MORE THAN ONE NODE OR SUBSYSTEM

HOST - HTRACLM SEGNAME='CLAIM',TABLENAME='"GHTR"."CLAIM"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN1 - HTRNDC SEGNAME='NDC',TABLENAME='"GHTR"."NDC"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN2 - HTRARGE SEGNAME='ARGUS_EL', TABLENAME='"WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY"', KEYS=04,WRITE=YES,KEYORDER=LOW,$

JOIN3 - HTRCLSTFSEGNAME= HTRCLSTF ,TABLENAME= 'GHTR."CLAIM_STAFF"‘, KEYS= 1 ,WRITE= YES ,$

1st Change - AFDs

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KEYORDER=LOW, $


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(FOC2510) FOCUS-MANAGED JOIN SELECTED FOR FOLLOWING REASON(S): (FOC2513) OUTER JOIN (ALL=ON or ALL=PASS) CANNOT BE PASSED (FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2592) RDBMS-MANAGED JOIN HAS BEEN DISABLEDSELECT T1."CLM_NUM",T1."CUST_NUM",T1."CLNT_NUM",

T1."RX_ACCT_NUM",T1."PLAN_OF_BEN",T1."MBR_NO",

T1."NABP_PHARMCY_NUM",T1."FILL_DT",T1."PAID_DT",

T1."COPAY_COIN_AMT",T1."INGRD_CST_AMT",T1."AWP_INGRD_CST_AMT",

T1."DISP_FEE_AMT",T1."SALES_TAX_AMT",T1."TOT_PD_AMT",

T1."UNC_AMT",T1."NEW_MBR_NO",T1."FUNDNG_SVC_CD" FROM

"GHTR"."CLAIM" T1 WHERE (T1."FUNDNG_SVC_CD" = '2') AND

(T1."PLAN_OF_BEN" = 'COMP3') AND (T1."PAID_DT" < '2011-01-01')

AND (T1."PAID_DT" >= '2006-01-01') AND (T1."RX_ACCT_NUM" =

'3209348') FOR FETCH ONLY;

SELECT T2."MBR_FRST_NM",T2."MBR_LAST_NM",T2."MBR_BRTH_DT",

T2."ARGUS_RUN_DT" FROM "GHTR"."ARGUS_ELIGIBILITY" T2 WHERE

(T2."CUST_NUM" = ?) AND (T2."CLNT_NUM" = ?) AND (T2."MBR_NO" =

?) FOR FETCH ONLY;

SELECT T3."CLNT_INGRD_CST_AMT",T3."CLNT_DISP_FEE_AMT", T3."CLNT_TOT_PD_AMT" FROM GHTR."CLAIM_STAFF" T3 WHERE (T3."CLM_NUM" = ?) FOR FETCH ONLY;

FSTRACE Output - #2

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(FOC2513) OUTER JOIN (ALL=ON or ALL=PASS) CANNOT BE PASSED

Original Code: SET ALL=PASS

Optimized Code: Delete the line or SET ALL=OFF/ON

The ALL setting handles missing segment instances in a report.

OFF = Always tries to Optimizes - DEFAULT

ON = Outer JOIN – Missing cross-referenced rows are processed – R 7.0.9

SET <SQL engine> SET SQLJOIN OUTER ON/OFF

PASS = Never Optimizes

2nd Change – ALL Setting

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(FOC2525) FOREIGN KEY IS NOT A SUPERSET OF PRIMARY KEY FOR SEGMENT: ARGUS_EL(FOC2509) RDBMS-MANAGED JOIN SELECTED BUT RESULTS MAY BE INACCURATE(FOC2524) JOIN TO A UNIQUE SEGMENT DOES NOT COVER ITS PRIMARY KEY(FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2594) AGGREGATION IS NOT APPLICABLE TO THE VERB USED SELECT T1."CLM_NUM",T1."CUST_NUM",T1."CLNT_NUM", T1."RX_ACCT_NUM",T1."PLAN_OF_BEN",T1."MBR_NO",T1."FILL_DT", T1."PAID_DT",T1."INGRD_CST_AMT",T1."DISP_FEE_AMT", T1."TOT_PD_AMT",T1."NEW_MBR_NO",T1."FUNDNG_SVC_CD", T2."ARGUS_RUN_DT",T3."CLNT_INGRD_CST_AMT", T3."CLNT_DISP_FEE_AMT",T3."CLNT_TOT_PD_AMT" FROM "GHTR"."CLAIM" T1,"GHTR"."ARGUS_ELIGIBILITY" T2,"GHTR"."CLAIM_STAFF" T3 WHERE (T2."CUST_NUM" = T1."CUST_NUM") AND (T2."CLNT_NUM" = T1."CLNT_NUM") AND (T2."MBR_NO" = T1."MBR_NO") AND (T3."CLM_NUM" = T1."CLM_NUM") AND (T1."FUNDNG_SVC_CD" = '2') AND (T1."PLAN_OF_BEN" = 'COMP3') AND (T1."PAID_DT" < '2018-01-01') AND (T1."PAID_DT" >= '2013-01-01') AND (T1."RX_ACCT_NUM" = '3209348') ORDER BY T1."CLM_NUM", T2."ARGUS_RUN_DT" DESC FOR FETCH ONLY;

FSTRACE Output - #3

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(FOC2525) FOREIGN KEY IS NOT A SUPERSET OF PRIMARY KEY FOR SEGMENT: ARGUS_EL(FOC2509) RDBMS-MANAGED JOIN SELECTED BUT RESULTS MAY BE INACCURATE(FOC2524) JOIN TO A UNIQUE SEGMENT DOES NOT COVER ITS PRIMARY KEY

3rd Change – AFD

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HOST - HTRACLM SEGNAME='CLAIM',TABLENAME='"GHTR"."CLAIM"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN1 - HTRNDC SEGNAME='NDC',TABLENAME='"GHTR"."NDC"', KEYS=01,WRITE=YES,KEYORDER=LOW,$

JOIN2 - HTRARGEL SEGNAME='ARGUS_EL', TABLENAME='"GHTR"."ARGUS_ELIGIBILITY"', KEYS=04,WRITE=YES,KEYORDER=LOW,$

JOIN3 - HTRCLSTFSEGNAME= HTRCLSTF ,TABLENAME= ‘”GHTR”."CLAIM_STAFF"‘, KEYS= 01 ,WRITE= YES , KEYORDER=LOW,$

Too Many Keys – Needs to be 02


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(FOC2590) AGGREGATION NOT DONE FOR THE FOLLOWING REASON: (FOC2594) AGGREGATION IS NOT APPLICABLE TO THE VERB USED SELECT T1."CLM_NUM",T1."CUST_NUM",T1."CLNT_NUM", T1."RX_ACCT_NUM",T1."PLAN_OF_BEN",T1."MBR_NO",T1."FILL_DT", T1."PAID_DT",T1."INGRD_CST_AMT",T1."DISP_FEE_AMT", T1."TOT_PD_AMT",T1."NEW_MBR_NO",T1."FUNDNG_SVC_CD", T2."ARGUS_RUN_DT",T3."CLNT_INGRD_CST_AMT", T3."CLNT_DISP_FEE_AMT",T3."CLNT_TOT_PD_AMT" FROM "GHTR"."CLAIM" T1,"GHTR"."ARGUS_ELIGIBILITY" T2,"GHTR"."CLAIM_STAFF" T3 WHERE (T2."CUST_NUM" = T1."CUST_NUM") AND (T2."CLNT_NUM" = T1."CLNT_NUM") AND (T2."MBR_NO" = T1."MBR_NO") AND (T3."CLM_NUM" = T1."CLM_NUM") AND (T1."FUNDNG_SVC_CD" = '2') AND (T1."PLAN_OF_BEN" = 'COMP3') AND (T1."PAID_DT" < '2018-01-01') AND (T1."PAID_DT" >= '2013-01-01') AND (T1."RX_ACCT_NUM" = '3209348') ORDER BY T1."CLM_NUM",

T2."ARGUS_RUN_DT" DESC FOR FETCH ONLY;

FSTRACE Output - #4 – Optimized

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FOCUS/DB2 & FOCUS Optimization Documentation

FOCUS Documentation is Available at: http://documentation.informationbuilders.com/masterindex/doc.asp

Current FOCUS/DB2 Documentation:

FOCUS for S/390 Relational Data Adapter - User’s Manual - Version 7.2

Document Number: DN1001155.1002

Current Optimization Documentation:

FOCUS for S/390 PowerBook - Version 7.0

Document Number: DN1001134.0401

http://documentation.informationbuilders.com/masterindex/doc.asp


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201011 FUN How to Access DB2 Efficiently From FOCUS