How to Access DB2 Efficiently from FOCUS
Michelle Cavanaugh
Information Builders Summit 2010 User
Conference
June 2010
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2009 CIGNA
How to Access DB2 Efficiently from FOCUS
Agenda
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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
2
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
How to Access DB2 Efficiently from FOCUS
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.
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
How to Access DB2 Efficiently from FOCUS
Introductions & Level Set
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
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
Basic FOCUS/DB2 Processing
1. FOCUS
 FOCUS calls requested module (TABLE, GRAPH)
 Reads & Parses MFD
 Parses the request (FOCEXEC)
 Calls the FOCUS/DB2 Interface
FOCUS
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
FOCUS/DB2
Interface
3. DB2
 Analyzes & Optimizes the passed SQL
 Chooses the access path & retrieval method
 Retrieves data
 Creates answer set
DB2
5
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Basic FOCUS/DB2 Processing
4. FOCUS/DB2 Interface
 DB2 sends 1 row of data or a SQL status message to
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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)
FOCUS
FOCUS/DB2
Interface
5. FOCUS
 Processes the Internal Matrix
 The report is displayed
DB2
6
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FOCUS/DB2 Optimization
Optimization Order
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
7
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FOCUS/DB2 Optimization
1. Projection & Record Selection – Translates FOCUS to SQL
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>’)
8
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization
2. JOIN Optimization
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
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FOCUS/DB2 Optimization
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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FOCUS/DB2 Optimization
4. Aggregation Optimization – Optional
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
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Trace Facility
Available Traces
1. STMTRACE – Statement Trace
2. SQLAGGR – SQL Aggregate Trace
3. SQLDI – SQL Details Trace
4. SQLCALL – See All Trace
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Trace Facility
1. STMTRACE
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
2. SQLAGGR
JOIN, SORT & Aggregate Optimization Analysis
 Last optimization level completed
Best = “AGGREGATION DONE…”
Pre-FOCUS 7.2 = FSTRACE3
13
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Trace Facility
3. SQLDI
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
4. SQLCALL
Shows All Commands & Data exchange between
Physical & Logical Layers of the Data Adaptor
New with FOCUS 7.2
14
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Basic Steps to Optimize FOCUS/DB2 Code
Optimization Steps:
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
15
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Optimization Steps
1. Setup Job for Traces
 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)
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
Optimization Steps
2. Restrict Data Retrieval
 Eliminate Database Retrieval:
SET XRETRIEVAL = OFF
 Limit the Number of Rows Being Read:
YES - IF READLIMIT EQ 100
NO - IF RECORDLIMIT EQ 100
3. Pick Your Trace Levels
 Recommended levels are:
STMTRACE & SQLAGGR
 Use only if absolutely necessary:
SQLDI & SQLCALL
17
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
Optimization Steps
4. Activate Selected Traces
 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
18
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
Optimization Steps
5. Review Trace Output
 You should try for only one SELECT statement
 There should be WHEREs
 You should see “AGGREGATION DONE…”
If not – return to & try again!
19
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Example:
Single TABLE
“CIGNA” and the “Tree of Life” logo are registered service marks of CIGNA Intellectual Property, Inc., licensed for use by CIGNA
Corporation and its operating subsidiaries. All products and services are provided exclusively by such operating subsidiaries and not
by CIGNA Corporation. Such operating subsidiaries include International Rehabilitation Associates, Inc. (Intracorp), CIGNA Behavioral
Health, Inc., vielife Limited, Connecticut General Life Insurance Company and HMO subsidiaries of CIGNA Health Corporation.
000000 00/09 © 2010 CIGNA
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2009 CIGNA
FOCUS/DB2 Optimization - Setup
DB2OPT FOCEXEC
-* 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 JCL
Allocate all the Required FOCUS files and...
//* ALLOCATE TRACE FILE
//FSTRACE DD DSN=TEST.FOCUS.FSTRACE,DISP=SHR
//*
//SYSIN
DD *
EXEC DB2OPT
<- Opt Set up
EXEC <FOCEXEC to be optimized>
FIN
/*
//
<- FSTRACE
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Single DB2 TABLE
MASTER File Description - MFD
$$$ CREATED BY AUTODB2 ON 06/24/04 AT
FILENAME=HTRARGEL,SUFFIX=SQLDS,$
SEGNAME='ARGUS_EL',SEGTYPE=S0,$
FIELD=CUST_NUM
,CUST_NUM
,A4
FIELD=CLNT_NUM
,CLNT_NUM
,A4
FIELD=HMO_CD
,HMO_CD
,A3
FIELD=MBR_END_DT
,MBR_END_DT
,A10
MANY MORE FIELDS...
11.47.33 BY XXXX
,A4
,A4
,A3
,A10
,MISSING=OFF,$
,MISSING=OFF,$
,MISSING=OFF,$
,MISSING=OFF,$
Access File Description - AFD
$$$ CREATED BY AUTODB2 ON 06/24/04 AT 11.47.33 BY XXXX
$$$ FILENAME=HTRARGEL,SUFFIX=SQLDS,$
SEGNAME='ARGUS_EL',
TABLENAME='"WINDSOR2_DB2P"."GHTR"."ARGUS_ELIGIBILITY"',
KEYS=04,WRITE=YES,KEYORDER=LOW,$
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Single DB2 TABLE
FOCEXEC
-SET &THISYY=EDIT(&DATEYYMD,'9999$$$$$$');
<- Date Setup
-SET &ENDYY=(&THISYY - 2);
-SET &THISMM=EDIT(&DATEYYMD,'$$$$$01$$$');
-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 Request
PRINT
CUST_NUM CLNT_NUM HMO_CD SUBACT_NO MBR_END_DT
IF CUST_NUM EQ '9999'
IF CLNT_NUM NE '9999'
IF TOSS350 EQ ‘Y'
IF MBR_END_DT GE '&ENDDT'
END
23
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FOCUS/DB2 Optimization – Single DB2 TABLE
FSTRACE Output
(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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FOCUS/DB2 Optimization – Single DB2 TABLE
Original FOCEXEC
DEFINE FILE HTRARGEL
<- DEFINEs
ACCT/A4 = EDIT(SUBACT_NO,'9999$$');
TOSS3501/A1 = IF HMO_CD EQ '200' THEN 'Y' ELSE 'N';
TOSS3502/A1 = IF ACCT FROM '0400' TO '0499' THEN 'Y' ELSE
IF ACCT FROM '4800' TO '4999' THEN 'Y' ELSE 'N';
TOSS3503/A2 = TOSS3501|TOSS3502;
TOSS350/A1 = IF TOSS3503 EQ 'YY' THEN 'Y' ELSE 'N';
END
-*
TABLE FILE HTRARGEL
<- TABLE
PRINT
CUST_NUM CLNT_NUM HMO_CD SUBACT_NO MBR_END_DT
IF CUST_NUM EQ '9999'
IF CLNT_NUM NE '9999'
IF TOSS350 EQ ‘Y‘
 FIELD not translated to SQL
IF MBR_END_DT GE '&ENDDT'
END
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FOCUS/DB2 Optimization – Single DB2 TABLE
Changes:
 Convert DEFINEs to WHEREs
 Make sure that you are using REAL fields
Modified FOCEXEC
DEFINE FILE HTRARGEL
ACCT/A4 = EDIT(SUBACT_NO,'9999$$');
END
-*
TABLE FILE HTRARGEL
PRINT
CUST_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 WHERE
WHERE (HMO_CD EQ '200') AND
((ACCT FROM '0400' TO '0499') OR (ACCT FROM '4800' TO
'4999'))
IF MBR_END_DT GE '&ENDDT'
END
26
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Single DB2 TABLE
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;
27
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Example:
Multiple TABLEs
“CIGNA” and the “Tree of Life” logo are registered service marks of CIGNA Intellectual Property, Inc., licensed for use by CIGNA
Corporation and its operating subsidiaries. All products and services are provided exclusively by such operating subsidiaries and not
by CIGNA Corporation. Such operating subsidiaries include International Rehabilitation Associates, Inc. (Intracorp), CIGNA Behavioral
Health, Inc., vielife Limited, Connecticut General Life Insurance Company and HMO subsidiaries of CIGNA Health Corporation.
000000 00/09 © 2010 CIGNA
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2009 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
JOIN Code:
JOIN NDC_NUM IN HTRACLM TO ALL NDC_NUM IN HTRNDC AS JOIN1
END
JOIN CUST_NUM AND CLNT_NUM AND MBR_NO IN HTRACLM
TO CUST_NUM AND CLNT_NUM AND MBR_NO IN HTRARGEL AS JOIN2
END
JOIN CLM_NUM IN HTRACLM TO CLM_NUM IN HTRCLSTF AS JOIN3
END
Active JOINs:
? JOIN
JOINS CURRENTLY ACTIVE
HOST
FIELD
FILE
TAG
---------NDC_NUM
HTRACLM
CUST_NUM HTRACLM
CLM_NUM
HTRACLM
CROSSREFERENCE
FIELD
FILE
TAG
---------NDC_NUM
HTRNDC
CUST_NUM HTRARGEL
CLM_NUM
HTRCLSTF
AS
ALL WH
---- -JOIN1 Y
N
JOIN2 N
N
JOIN3 N
N
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
JOIN Structure:
HOST
JOIN1
JOIN2
JOIN3
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
Access File Descriptions - AFDs
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 - HTRCLSTF
SEGNAME= HTRCLSTF ,TABLENAME= 'GHTR."CLAIM_STAFF"‘,
KEYS= 1
,WRITE= YES ,$
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Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
Original FOCEXEC
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 Request
LIST
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
32
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FOCUS/DB2 Optimization – Multiple DB2 TABLEs
FSTRACE Output - #1
(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;
33
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
1st Change - AFDs
(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 - HTRCLSTF
SEGNAME= HTRCLSTF ,TABLENAME= 'GHTR."CLAIM_STAFF"‘,
KEYS= 1
,WRITE= YES ,$ KEYORDER=LOW, $
34
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
FSTRACE Output - #2
(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 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 "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;
35
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
2nd Change – ALL Setting
(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
36
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
FSTRACE Output - #3
(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;
37
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
3rd Change – AFD
(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
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,$ Too Many Keys – Needs to be 02
JOIN3 - HTRCLSTF
SEGNAME= HTRCLSTF ,TABLENAME= ‘”GHTR”."CLAIM_STAFF"‘,
KEYS= 01
,WRITE= YES , KEYORDER=LOW,$
38
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
FOCUS/DB2 Optimization – Multiple DB2 TABLEs
FSTRACE Output - #4 – Optimized
(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;
39
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
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
40
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2010 CIGNA
Questions & Answers
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Health, Inc., vielife Limited, Connecticut General Life Insurance Company and HMO subsidiaries of CIGNA Health Corporation.
000000 00/09 © 2010 CIGNA
Confidential, unpublished property of CIGNA. Do not duplicate or distribute. Use and distribution limited solely to authorized personnel. © 2009 CIGNA