1

HR7.5 Department Security Tree Tuning

David KurtzGo-Faster Consultancy Ltd.

david@go-faster.co.uk

www.go-faster.co.uk

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Why Trees?

3

This is a technical presentation

Complex SQL Optimisers Query Execution

Plans Indexes Replication

4

PeopleSoft Applications

• HRMS– Department

Security Tree

• Financials– Roll-Up Reporting– nVision

• Summary Ledgers

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Department Security Tree

• A operator has access to those employees who have, or who will have, jobs in or below (as defined by the department security tree in force as at a given date) those departments to which the operator has been given access

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Panel Search Dialogue

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Panel Search Record Query

SELECT DISTINCT EMPLID, NAME, LAST_NAME_SRCH, ...

FROM PS_PERS_SRCH_GBL WHERE EMPLID LIKE '8%'AND OPRCLASS='ALLPANLS' ORDER BY EMPLID

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PERS_SRCH / EMPLMT_SRCH

CREATE OR REPLACE VIEW PS_PERS_SRCH_GBL (...) AS SELECT …FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND, PS_NID_TYPE_TBL NDT, PS_SCRTY_TBL_DEPT SEC WHERE A.EMPLID=B.EMPLID AND A.EMPLID=ND.EMPLID AND ND.COUNTRY=NDT.COUNTRY AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE AND ( B.EFFDT>=%CURRENTDATEIN

OR ( B.EFFDT=( SELECT MAX(B2.EFFDT)FROM PS_JOB B2WHERE B2.EMPLID=B.EMPLID AND B2.EMPL_RCD#=B.EMPL_RCD# AND B2.EFFDT<=%CURRENTDATEIN) AND B.EFFSEQ= (SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B3.EMPLID=B.EMPLID AND B3.EMPL_RCD#=B.EMPL_RCD# AND B3.EFFDT=B.EFFDT ) ) )

AND SEC.ACCESS_CD='Y' AND EXISTS (SELECT 'X'

FROM PSTREENODE SEC3 WHERE SEC3.SETID = SEC.SETID AND SEC3.SETID = B.SETID_DEPT AND SEC3.TREE_NAME='DEPT_SECURITY' AND SEC3.EFFDT= SEC.TREE_EFFDTAND SEC3.TREE_NODE=B.DEPTID AND SEC3.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END AND NOT EXISTS (SELECT 'X' FROM PS_SCRTY_TBL_DEPT SEC2 WHERE SEC.OPRID = SEC2.OPRID AND SEC.SETID = SEC2.SETID AND SEC.TREE_NODE_NUM <> SEC2.TREE_NODE_NUM AND SEC3.TREE_NODE_NUM BETWEEN SEC2.TREE_NODE_NUM AND SEC2.TREE_NODE_NUM_END AND SEC2.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END))

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Tree-Reading Security View

EMPLID

PS_PERSONAL_DATA A PS_JOB B

PS_SCRTY_TBL_DEPTSEC

PSTREENODESEC3

EMPLID

PS_JOB D

EMPLID, EMPL_RCD#, EFFDT

SETID,EFFDT,

NODE_NUM

SETID, DEPTID

PS_SCRTY_TBL_DEPTSEC2

SETID,OPRID,

NODE_NUM NODE_NUM

PS_PERS_NID ND PS_NID_TYPE_TBL NDT

COUNTRY, NATIONAL_ID_TYPE

SETID, DEPTID

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Options for Optimisation

• Simplification– Flattening

• Optimiser– Oracle only: Cost -v- Rule

• Pre-process– Generated tables

• Replication

– Data Latency -v- Performance

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Optimisers

• Rule– Old (Stable)

– Inflexible

– Predictable

– Influence

• Cost– New

– Hints (Oracle)

– Statistics

– Distributions

– Maintenance

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WHERE EXISTS(sub-query)

CREATE OR REPLACE VIEW PS_PERS_SRCH_GBL (...) AS SELECT …FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND, PS_NID_TYPE_TBL NDT, PS_SCRTY_TBL_DEPT SEC WHERE A.EMPLID=B.EMPLID AND A.EMPLID=ND.EMPLID AND ND.COUNTRY=NDT.COUNTRY AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE AND (B.EFFDT>=%CURRENTDATEIN

OR ( B.EFFDT=( SELECT MAX(B2.EFFDT)FROM PS_JOB B2WHERE B2.EMPLID=B.EMPLID AND B2.EMPL_RCD#=B.EMPL_RCD# AND B2.EFFDT<=%CURRENTDATEIN) AND B.EFFSEQ= (SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B3.EMPLID=B.EMPLID AND B3.EMPL_RCD#=B.EMPL_RCD# AND B3.EFFDT=B.EFFDT ) ) )

AND SEC.ACCESS_CD='Y' AND EXISTS (SELECT 'X'

FROM PSTREENODE SEC3 WHERE SEC3.SETID = SEC.SETID AND SEC3.SETID = B.SETID_DEPT AND SEC3.TREE_NAME='DEPT_SECURITY' AND SEC3.EFFDT= SEC.TREE_EFFDTAND SEC3.TREE_NODE=B.DEPTID AND SEC3.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END AND NOT EXISTS (SELECT 'X' FROM PS_SCRTY_TBL_DEPT SEC2 WHERE SEC.OPRID = SEC2.OPRID AND SEC.SETID = SEC2.SETID AND SEC.TREE_NODE_NUM <> SEC2.TREE_NODE_NUM AND SEC3.TREE_NODE_NUM BETWEEN SEC2.TREE_NODE_NUM AND SEC2.TREE_NODE_NUM_END AND SEC2.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END))

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WHERE EXISTS(sub-query)

... AND EXISTS (SELECT 'X'

FROM PSTREENODE SEC3 WHERE SEC3.SETID = SEC.SETID AND SEC3.SETID = B.SETID_DEPT AND SEC3.TREE_NAME='DEPT_SECURITY' AND SEC3.EFFDT= SEC.TREE_EFFDTAND SEC3.TREE_NODE=B.DEPTID AND SEC3.TREE_NODE_NUM

BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END

...

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WHERE NOT EXISTS(sub-query)

CREATE OR REPLACE VIEW PS_PERS_SRCH_GBL (...) AS SELECT …

FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND, PS_NID_TYPE_TBL NDT, PS_SCRTY_TBL_DEPT SEC, PSTREENODE SEC3

WHERE A.EMPLID=B.EMPLID

AND A.EMPLID=ND.EMPLID

AND B.EMPLID=ND.EMPLID

AND ND.COUNTRY=NDT.COUNTRY

AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE

AND ( B.EFFDT>=%CURRENTDATEIN

OR ( B.EFFDT=( SELECT MAX(B2.EFFDT)

FROM PS_JOB B2

WHERE B.EMPLID=B2.EMPLID

AND B.EMPL_RCD#=B2.EMPL_RCD#

AND B2.EFFDT<=%CURRENTDATEIN )

AND B.EFFSEQ=( SELECT MAX(B3.EFFSEQ)

FROM PS_JOB B3

WHERE B.EMPLID=B3.EMPLID

AND B.EMPL_RCD#=B3.EMPL_RCD#

AND B.EFFDT=B3.EFFDT)))

AND SEC.ACCESS_CD='Y'

AND SEC3.SETID = SEC.SETID

AND SEC3.SETID = B.SETID_DEPT

AND SEC3.TREE_NAME='DEPT_SECURITY'

AND SEC3.EFFDT= SEC.TREE_EFFDT

AND SEC3.TREE_NODE=B.DEPTID

AND SEC3.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM

AND SEC.TREE_NODE_NUM_END

AND NOT EXISTS ( SELECT 'X'

FROM PS_SCRTY_TBL_DEPT SEC2

WHERE SEC.OPRID = SEC2.OPRID

AND SEC.SETID = SEC2.SETID

AND SEC.TREE_NODE_NUM <> SEC2.TREE_NODE_NUM

AND SEC3.TREE_NODE_NUM BETWEEN SEC2.TREE_NODE_NUM AND SEC2.TREE_NODE_NUM_END

AND SEC2.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END)

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WHERE NOT EXISTS(sub-query)

… AND NOT EXISTS(SELECT 'X' FROM PS_SCRTY_TBL_DEPT SEC2 WHERE SEC.OPRID = SEC2.OPRID AND SEC.SETID = SEC2.SETID AND SEC.TREE_NODE_NUM <>

SEC2.TREE_NODE_NUM AND SEC3.TREE_NODE_NUM

BETWEEN SEC2.TREE_NODE_NUM AND SEC2.TREE_NODE_NUM_END

AND SEC2.TREE_NODE_NUM BETWEEN SEC.TREE_NODE_NUM AND SEC.TREE_NODE_NUM_END)

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Workaround to Outer-join to 2 tables

CREATE OR REPLACE VIEW fudge_vw (...) AS SELECT ... FROM PSTREENODE E,

PS_SCRTY_TBL_DEPT CWHERE C.ACCESS_CD='Y'AND E.SETID=C.SETIDAND E.TREE_NAME='DEPT_SECURITY'AND E.EFFDT=C.TREE_EFFDTAND E.TREE_NODE_NUM

BETWEEN C.TREE_NODE_NUM AND C.TREE_NODE_NUM_END

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WHERE NOT EXISTS(sub-query)

• Don’t try this at home

AND FDG.SETID = B.SETID_DEPT AND FDG.TREE_NODE=B.DEPTID AND SEC2.OPRID IS NULLAND FDG.OPRID = SEC2.OPRID(+)AND FDG.SETID = SEC2.SETID(+)AND FDG.T_TREE_NODE_NUM >= SEC2.TREE_NODE_NUM(+)AND FDG.T_TREE_NODE_NUM <=SEC2.TREE_NODE_NUM_END(+)AND FDG.S_TREE_NODE_NUM <> SEC2.TREE_NODE_NUM (+)AND FDG.S_TREE_NODE_NUM <= SEC2.TREE_NODE_NUM (+)AND FDG.S_TREE_NODE_NUM_END >= SEC2.TREE_NODE_NUM (+)

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Fully Flattened View

• Don’t try this at homeCREATE OR REPLACE VIEW PS_PERS_SRCH_GBL (...) AS SELECT ... FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND, PS_NID_TYPE_TBL NDT, PS_SCRTY_TBL_DEPT SEC2, PS_FUDGE_VW FDGWHERE A.EMPLID=B.EMPLID AND A.EMPLID=ND.EMPLID AND B.EMPLID=ND.EMPLIDAND ND.COUNTRY=NDT.COUNTRY AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE AND ( B.EFFDT>= %CURRENTDATEIN

OR ( B.EFFDT=( SELECT MAX(B2.EFFDT) FROM PS_JOB B2 WHERE B.EMPLID=B2.EMPLID AND B.EMPL_RCD#=B2.EMPL_RCD# AND B2.EFFDT<= %CURRENTDATEIN)

AND B.EFFSEQ=( SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B.EMPLID=B3.EMPLID AND B.EMPL_RCD#=B3.EMPL_RCD# AND B.EFFDT=B3.EFFDT)))

AND FDG.SETID = B.SETID_DEPT AND FDG.TREE_NODE=B.DEPTID AND SEC2.OPRID IS NULLAND FDG.OPRID = SEC2.OPRID(+)AND FDG.SETID = SEC2.SETID(+)AND FDG.T_TREE_NODE_NUM >= SEC2.TREE_NODE_NUM(+)AND FDG.T_TREE_NODE_NUM <= SEC2.TREE_NODE_NUM_END(+)AND FDG.S_TREE_NODE_NUM <> SEC2.TREE_NODE_NUM(+)AND FDG.S_TREE_NODE_NUM <= SEC2.TREE_NODE_NUM(+)AND FDG.S_TREE_NODE_NUM_END >= SEC2.TREE_NODE_NUM(+)

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So what is the benefit of flattening?

• Depends upon the conditions– WHERE EMPLID = ‘1234’

• slightly worse

– WHERE EMPLID like ‘1234%’• no difference

– WHERE NAME = ‘SMITH’• better

– WHERE NAME LIKE ‘SMI%’• much better

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So what is the benefit of flattening?

0

10000

20000

30000

40000

50000

60000

Vanilla PartiallyFlattened

Full Flattened

i/o RULE

COST

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And there’s more!

EMPLID

PS_PERSONAL_DATA A PS_JOB B

PS_SCRTY_TBL_DEPTSEC

PSTREENODESEC3

EMPLID

PS_JOB D

EMPLID, EMPL_RCD#, EFFDT

SETID,EFFDT,

NODE_NUM

SETID, DEPTID

PS_SCRTY_TBL_DEPTSEC2

SETID,OPRID,

NODE_NUM NODE_NUM

PS_PERS_NID ND PS_NID_TYPE_TBL NDT

COUNTRY, NATIONAL_ID_TYPE

SETID, DEPTID

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Pre-generated tables

• Pre-join the data– Once when generate

– Not every time in the view

• Extra indexes• Latency

– frequency of regeneration

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Security Table

CREATE TABLE PS_SECURITY ASSELECT E.TREE_NODE, C.OPRID, C.SETIDFROM PS_SCRTY_TBL_DEPT C,

PSTREENODE EWHERE C.ACCESS_CD='Y'AND E.SETID=C.SETIDAND E.TREE_NAME='DEPT_SECURITY'AND E.EFFDT=C.TREE_EFFDTAND E.TREE_NODE_NUM BETWEEN C.TREE_NODE_NUM AND C.TREE_NODE_NUM_ENDAND NOT EXISTS(

SELECT 'X'FROM PS_SCRTY_TBL_DEPT GWHERE C.OPRID=G.OPRIDAND C.TREE_NODE_NUM<>G.TREE_NODE_NUMAND E.TREE_NODE_NUM BETWEEN

G.TREE_NODE_NUM AND G.TREE_NODE_NUM_ENDAND G.TREE_NODE_NUM BETWEEN

C.TREE_NODE_NUM AND C.TREE_NODE_NUM_END)

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PERS_SRCH

CREATE OR REPLACE VIEW PS_PERS_SRCH_GBL (...) AS SELECT ...FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND,

PS_PERS_NID_TYPE NDT, SECURITY SECWHERE A.EMPLID=B.EMPLID AND A.EMPLID=ND.EMPLID AND B.EMPLID=ND.EMPLIDAND ND.COUNTRY=NDT.COUNTRY AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE AND ( B.EFFDT>= %CURRENTDATEIN

OR ( B.EFFDT=(SELECT MAX(B2.EFFDT) FROM PS_JOB B2 WHERE B.EMPLID=B2.EMPLID AND B.EMPL_RCD#=B2.EMPL_RCD# AND B2.EFFDT<= %CURRENTDATEIN)

AND B.EFFSEQ=(SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B.EMPLID=B3.EMPLID AND B.EMPL_RCD#=B3.EMPL_RCD# AND B.EFFDT=B3.EFFDT)))

AND SEC.SETID = B.SETID_DEPT AND SEC.TREE_NODE=B.DEPTID

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PERSONAL_DATA, JOB & NID

CREATE TABLE PS_GEN_JOB_TBL(...) AS SELECT DISTINCT ...FROM PS_PERSONAL_DATA A, PS_JOB B, PS_PERS_NID ND,

PS_NID_TYPE_TBL NDTWHERE A.EMPLID=B.EMPLIDAND A.EMPLID=ND.EMPLIDAND B.EMPLID=ND.EMPLIDAND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPEAND ( B.EFFDT>=%CURRENTDATEIN

OR ( B.EFFDT=( SELECT MAX(B2.EFFDT)FROM PS_JOB B2WHERE B2.EMPLID=B.EMPLID AND B2.EMPL_RCD#=B.EMPL_RCD# AND B2.EFFDT<=%CURRENTDATEIN)

AND B.EFFSEQ= (SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B3.EMPLID=B.EMPLID AND B3.EMPL_RCD#=B.EMPL_RCD# AND B3.EFFDT=B.EFFDT)))

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Current and future JOB

CREATE TABLE PS_GEN_JOB_TBL(...) AS SELECT DISTINCT B.EMPLID, B.EMPL_RCD#, B.DEPTID, B.SETID_DEPTFROM PS_JOB BWHERE ( B.EFFDT>=%CURRENTDATEIN

OR ( B.EFFDT=(SELECT MAX(B2.EFFDT)FROM PS_JOB B2WHERE B2.EMPLID=B.EMPLID AND B2.EMPL_RCD#=B.EMPL_RCD# AND B2.EFFDT<=%CURRENTDATEIN)

AND B.EFFSEQ=(SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B3.EMPLID=B.EMPLID AND B3.EMPL_RCD#=B.EMPL_RCD# AND B3.EFFDT=B.EFFDT)))

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Maintain via PeopleCode

• JOB.DEPTID.SavePostChg/* maintain GEN_JOB_TBL whenever an update to PS_JOB is

made */SQLExec(”delete from PS_GEN_JOB_TBL where EMPLID = :1 and

EMPL_RCD# = :2", EMPLID, EMPL_RCD#);SQLExec("insert into PS_GEN_JOB_TBL select * from

PS_GEN_JOB_VW where EMPLID = :1 and EMPL_RCD# = :2", EMPLID, EMPL_RCD#);

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Current or first JOB, but no future

CREATE TABLE PS_GEN_JOB_TBL(...) AS SELECT B.EMPLID, B.EMPL_RCD#, B.DEPTID, B.SETID_DEPT

FROM PS_JOB BWHERE ( B.EFFDT= (SELECT MAX(D.EFFDT)

FROM PS_JOB DWHERE B.EMPLID=D.EMPLIDAND B.EMPL_RCD#=D.EMPL_RCD#AND D.EFFDT<=%CURRENTDATEIN)

OR B.EFFDT= (SELECT MIN(E.EFFDT)FROM PS_JOB EWHERE B.EMPLID=e.EMPLIDAND B.EMPL_RCD#=E.EMPL_RCD#HAVING MIN(E.EFFDT)>%CURRENTDATEIN))

AND B.EFFSEQ=(SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B.EMPLID=B3.EMPLID AND B.EMPL_RCD#=B3.EMPL_RCD# AND B.EFFDT=B3.EFFDT))

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Maintain via PeopleCode

• JOB.DEPTID.SavePostChg

/* maintain GEN_JOB_TBL whenever an update to PS_JOB is made */&TMP = 0;SQLExec("select 1 from PS_GEN_JOB_TBL where EMPLID = :1 and

EMPL_RCD# = :2", EMPLID, EMPL_RCD#, &TMP);If %SqlRows > 0 Then SQLExec("update PS_GEN_JOB_TBL set (DEPTID, SETID_DEPT) =

(SELECT DEPTID, SETID_DEPT) from PS_GEN_JOB_VW where EMPLID = :1 and EMPL_RCD# = :2) where EMPLID = :1 and EMPL_RCD# = :2", EMPLID, EMPL_RCD#);

Else SQLExec("insert into PS_GEN_JOB_TBL select * from

PS_GEN_JOB_VW where EMPLID = :1 and EMPL_RCD# = :2", EMPLID, EMPL_RCD#);

End-If;

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Panel Search Record

CREATE OR REPLACE VIEW PERS_SRCH_GBL(...)AS SELECT /*+ALL_ROWS*/ ...FROM PS_PERSONAL_DATA A, PS_GEN_JOB_TBL B,

PS_PERS_NID ND, PS_NID_TYPE_TBL NDT, PS_SECURITY SEC

WHERE A.EMPLID=B.EMPLID AND A.EMPLID=ND.EMPLID AND B.EMPLID=ND.EMPLIDAND ND.COUNTRY=NDT.COUNTRY AND ND.NATIONAL_ID_TYPE=NDT.NATIONAL_ID_TYPE AND SEC.SETID = B.SETID_DEPT AND SEC.TREE_NODE=B.DEPTID

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Query Security Record

CREATE OR REPLACE VIEW PS_EMPLMT_SRCH_QRY(EMPLID, EMPL_RCD#, OPRCLASS)AS SELECT DISTINCT A.EMPLID, A.EMPL_RCD#, S.OPRIDFROM PS_SECURITY S,PS_GEN_JOB_TBL AWHERE S.TREE_NODE=A.DEPTIDAND S.SETID=A.SETID_DEPT

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Current & Current or future JOB

CREATE TABLE PS_GEN_JOB_TBL(...) AS SELECT B.EMPLID, B.EMPL_RCD#, B.DEPTID, B.SETID_DEPT, MIN(B.EFFDT)FROM PS_JOB BWHERE (B.EFFDT>=

(SELECT NVL(MAX(D.EFFDT),%CURRENTDATEIN)FROM PS_JOB DWHERE B.EMPLID=D.EMPLIDAND B.EMPL_RCD#=D.EMPL_RCD#AND D.EFFDT<=%CURRENTDATEIN)

AND B.EFFSEQ=(SELECT MAX(B3.EFFSEQ) FROM PS_JOB B3 WHERE B.EMPLID=B3.EMPLID AND B.EMPL_RCD#=B3.EMPL_RCD# AND B.EFFDT=B3.EFFDT))

GROUP BY B.EMPLID, B.EMPL_RCD#, B.DEPTID, B.SETID_DEPT

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Read only & Read/Write Security

CREATE TABLE PS_SECURITY ASSELECT E.TREE_NODE, C.OPRID, C.SETID, C.ACCESS_CDFROM PS_SCRTY_TBL_DEPT C,

PSTREENODE EWHERE C.ACCESS_CD != 'N'AND E.SETID=C.SETIDAND E.TREE_NAME='DEPT_SECURITY'AND E.EFFDT=C.TREE_EFFDTAND E.TREE_NODE_NUM BETWEEN C.TREE_NODE_NUM AND C.TREE_NODE_NUM_ENDAND NOT EXISTS(

SELECT 'X'FROM PS_SCRTY_TBL_DEPT GWHERE C.OPRID=G.OPRIDAND C.TREE_NODE_NUM<>G.TREE_NODE_NUMAND E.TREE_NODE_NUM BETWEEN

G.TREE_NODE_NUM AND G.TREE_NODE_NUM_ENDAND G.TREE_NODE_NUM BETWEEN

C.TREE_NODE_NUM AND C.TREE_NODE_NUM_END)

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Current Only/Read Write Security

• Current & Current or future JOB

CREATE OR REPLACE VIEW PS_EMPLMT_SRCH_QRY(EMPLID, EMPL_RCD#, OPRCLASS)AS SELECT DISTINCT A.EMPLID, A.EMPL_RCD#, S.OPRIDFROM PS_SECURITY S,PS_GEN_JOB_TBL AWHERE S.TREE_NODE=A.DEPTIDAND S.SETID=A.SETID_DEPTAND A.EFFDT <= %CURRENTDATEINAND S.ACCESS_CD = 'Y'

35

The benefit of generated tables?

0

10000

20000

30000

40000

50000

60000

Vanilla Partially Flattened Full Flattened Security Table Fully Generated

i/o RULE

COST

36

The benefit of generated tables?

1

10

100

1000

10000

100000

i/o RULE

COST

RULE 13840 13840 14318 13825 42

COST 56836 3319 12233 1377 9

VanillaPartially

FlattenedFull

FlattenedSecurity

TableFully

Generated

37

Tree Reading Query Performance

• Security Views– Flatten

– Cost Based Optimiser

– Pre-Generated tables

38

Implementation recommendations

• Panel Search Records– Two generated tables with PeopleCode

• Query Security Records– Two generated tables

– Remove duplicates• Distinct

• Current Security Only

39

HR7.5 Department Security Tree Tuning

David KurtzGo-Faster Consultancy Ltd.

david@go-faster.co.uk

www.go-faster.co.uk