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SQL*Fingerprints

SQL*Fingerprints. David Kurtz Go-Faster Consultancy Ltd. david.kurtz@go-faster.co.uk www.go-faster.co.uk. DBA Independent consultant System Performance tuning PeopleSoft ERP Oracle RDBMS UK Oracle User Group Unix SIG Oak Table www.oaktable.net. Book www.psftdba.com. Who am I?.

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SQL*Fingerprints

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  1. SQL*Fingerprints David Kurtz Go-Faster Consultancy Ltd. david.kurtz@go-faster.co.uk www.go-faster.co.uk

  2. DBA Independent consultant System Performance tuning PeopleSoft ERP Oracle RDBMS UK Oracle User Group Unix SIG Oak Table www.oaktable.net Book www.psftdba.com Who am I? www.go-faster.co.uk

  3. Resources • If you can’t hear me say so now. • Please feel free to ask questions as we go along. • The presentation will be available from • www.ukoug.org • www.go-faster.co.uk • Further reading: • Chapter 11 of PeopleSoft for the Oracle DBA www.go-faster.co.uk

  4. Performance Tuning • What is Performance Tuning? • Response Time • Often down to poor SQL • Oracle RDBMS • V$ views, SQL*Trace • PeopleTools SQL Trace • PeopleCode headers • PeopleSoft Performance Monitor www.go-faster.co.uk

  5. Oracle RDBMS SQL*Trace • Trace batch processes via trigger • Enable trace on PSAPPSRV processes • List of all the SQL Statements www.go-faster.co.uk

  6. Where does the SQL Come From? • Most performance tools will identify poor SQL • But they won’t tell you who or what submitted it • Unless the application is instrumented www.go-faster.co.uk

  7. Tuning without code changes • Database Parameters • Indexes • Hints via Stored Outlines (Oracle only) www.go-faster.co.uk

  8. If you can find it, then you can change it! This presentation is about how to find the SQL. www.go-faster.co.uk

  9. DBMS_APPLICATION_INFO • Oracle implemented DBMS_APPLICATION_INFO module to solve this problem in Oracle Apps. • SET_MODULE • PeopleSoft only uses CLIENT_INFO • So you only know which OPRID is responsible for a statement www.go-faster.co.uk

  10. In the following slides I am going to show a number of SQL statements. • Can you work out what produced them? ALTER SESSION SET _AUDIENCE_PARTICIPATION_ENABLED=TRUE; www.go-faster.co.uk

  11. Component Processor SELECT EMPLID, PER_STATUS, TO_CHAR(BIRTHDATE,'YYYY-MM-DD'), BIRTHPLACE, BIRTHCOUNTRY,BIRTHSTATE, TO_CHAR(DT_OF_DEATH,'YYYY-MM-DD'), TO_CHAR(ORIG_HIRE_DT,'YYYY-MM-DD'), HIGHLY_COMP_EMPL_C, HIGHLY_COMP_EMPL_P FROM PS_PERSON WHERE EMPLID=:1 ORDER BY EMPLID www.go-faster.co.uk

  12. Component Processor • This SQL is interpreted from contents of PeopleTools tables • You won’t find this SQL anywhere in code. • Generally all UPPER CASE • Dates converted to strings in the format YYYY-MM-DD • Date-times converted to strings in the format YYYY-MM-DD-HH24.MI.SS."000000" • One SQL loading one table per scroll • Predicated and sorted by the ‘key’ fields. www.go-faster.co.uk

  13. Search Dialogue SELECT DISTINCT EMPLID, EMPL_RCD, NAME, LAST_NAME_SRCH, SETID_DEPT, DEPTID, NAME_AC, PER_STATUS FROM PS_PERS_SRCH_GBL WHERE ROWSECCLASS=:1 AND UPPER(NAME) LIKE UPPER('Smith') || '%' ESCAPE '\' ORDER BY NAME, EMPLID www.go-faster.co.uk

  14. Component Processor Variations • Search Dialogue queries are • always DISTINCT • Often contain ROWSECCLASS • User search criteria as literals • UPPER() function when case insensitive • Wildcard added automatically when search string shorter than column www.go-faster.co.uk

  15. Translate Values • Hint added from PT8.43 SELECT /*+ FIRST_ROWS */ NAME_TYPE, ORDER_BY_SEQ, NAME_TYPE_DESCR FROM PS_NAME_TYPE_TBL A ORDER BY NAME_TYPE www.go-faster.co.uk

  16. PeopleCode • PeopleSoft’s proprietary 3GL • Tokenised in PeopleTools tables • Can also be executed by Application Engine www.go-faster.co.uk

  17. SQLExec() Select A.BEN_STATUS from PS_ACTN_REASON_TBL A where A.ACTION = :1 and A.ACTION_REASON = (Select min(AA.ACTION_REASON) from PS_ACTN_REASON_TBL AA where AA.ACTION = A.ACTION) and A.EFFDT = (Select max(AAA.EFFDT) from PS_ACTN_REASON_TBL AAA where AAA.ACTION = A.ACTION and AAA.ACTION_REASON = A.ACTION_REASON) www.go-faster.co.uk

  18. SQLExec() SQLExec("Select A.BEN_STATUS from PS_ACTN_REASON_TBL A where A.ACTION = :1 and A.ACTION_REASON = (Select min(AA.ACTION_REASON) from PS_ACTN_REASON_TBL AA where AA.ACTION = A.ACTION) and A.EFFDT = (Select max(AAA.EFFDT) from PS_ACTN_REASON_TBL AAA where AAA.ACTION = A.ACTION and AAA.ACTION_REASON = A.ACTION_REASON)", &ACTION, &FETCH_STATUS); www.go-faster.co.uk

  19. SQLExec() • What you code is what you get • Mixed Case • More complex • Joins several tables • Hand Coded • Multi character row source identifiers (table aliases) • Mostly using bind variables • literals possible if dynamically generate SQL www.go-faster.co.uk

  20. ScrollSelect() SELECT SETID, DEPTID, POSITION_POOL_ID, SETID_JOBCODE, JOBCODE, POSITION_NBR, EMPLID, EMPL_RCD, JOB_REQ_NBR, TRIGGER_RECORD, TIME_STAMP, TO_CHAR(TIME_STAMP,'YYYY-MM-DD-HH24.MI.SS."000000"'), PROCESSED FROM PS_ENCUMB_TRIGGER Where TRIGGER_RECORD = 'J' and emplid = :1 and EMPL_RCD = :2 and PROCESSED = 'N' ORDER BY SETID, DEPTID, POSITION_POOL_ID, SETID_JOBCODE, JOBCODE, POSITION_NBR, EMPLID, EMPL_RCD, JOB_REQ_NBR, TRIGGER_RECORD, TIME_STAMP www.go-faster.co.uk

  21. ScrollSelect() ScrollSelect(1, Record.ENCUMB_TRIGGER, Record.ENCUMB_TRIGGER, "Where TRIGGER_RECORD = 'J' and emplid = :1 and EMPL_RCD = :2 and PROCESSED = 'N'", &EMPLID, &EMPL_RCD); www.go-faster.co.uk

  22. Upper Case Select clause All the columns/fields From clause Table name Order by clause Key fields Where clause As coded Binds and/or literals ScrollSelect() www.go-faster.co.uk

  23. Rowset Fill() function SELECT FILL.PNLNAME, FILL.PNLFLDID, FILL.FIELDNUM, FILL.PNLFIELDNAME, FILL.FIELDTYPE, FILL.RECNAME, FILL.FIELDNAME, FILL.LBLTYPE, FILL.GOTOPORTALNAME, FILL.GOTONODENAME, FILL.GOTOMENUNAME, FILL.GOTOPNLGRPNAME, FILL.GOTOMKTNAME, FILL.GOTOPNLNAME, FILL.GOTOPNLACTION FROM PS_CO_PNLFIELD_VW FILL WHERE PNLNAME = :1 and FIELDTYPE = 16 and LBLTYPE = 7 AND RECNAME = :2 and FIELDNAME = :3 www.go-faster.co.uk

  24. Rowset Fill() function &PnlField_Rs = CreateRowset(Record.CO_PNLFIELD_VW); &PnlField_Rs.Flush(); &PnlField_Rs.Fill("WHERE PNLNAME = :1 and FIELDTYPE = 16 and LBLTYPE = 7 AND RECNAME = :2 and FIELDNAME = :3", %Page, &LinkRecName, &LinkFieldName); www.go-faster.co.uk

  25. Rowset functions • Replacing older scroll functions • [OT: Although I think they are less efficient at run time!] • Complexities hidden inside view • Upper Case select clause • Mixed case where clause www.go-faster.co.uk

  26. A useful trick • Joining tables in Scroll/Fill functions &PnlField_Rs = CreateRowset(Record.X); &PnlField_Rs.Fill(",PS_Y A WHERE FILL.MYCOL = A.MYCOL …",…); • And this is what you get SELECT FILL.… FROM PS_X FILL ,PS_Y A WHERE FILL.MYCOL = A.MYCOL … • This can be more efficient than burying everything in a view • especially if a group function is involved. www.go-faster.co.uk

  27. Searching PeopleCode • Application Designer ‘Find In…’ Utility • Effective but slow • Save all PeopleCode to a text file • Search for ; • Save result • Search text file with word www.go-faster.co.uk

  28. Query SELECT A.EMPLID, A.ATTENDANCE, A.COURSE, B.DESCR, D.NAME, A.SESSION_NBR, TO_CHAR(A.STATUS_DT,'YYYY-MM-DD'),B.COURSE FROM PS_TRAINING A, PS_COURSE_TBL B, PS_PERSONAL_DTA_VW D, PS_PERS_SRCH_QRY D1 WHERE D.EMPLID = D1.EMPLID AND D1.ROWSECCLASS = 'HCDPALL' AND ( A.COURSE = :1 AND A.ATTENDANCE IN ('S','W') AND A.COURSE = B.COURSE AND A.EMPLID = D.EMPLID ) www.go-faster.co.uk

  29. But Which query? SELECT a.oprid, a.qryname FROM psqryrecord a , psqryrecord b , psqryrecord d WHERE a.oprid = b.oprid AND a.qryname = b.qryname AND a.oprid = d.oprid AND a.qryname = d.qryname AND a.corrname = 'A' AND a.recname = 'TRAINING' AND b.corrname = 'B' AND b.recname = 'COURSE_TBL' AND d.corrname = 'D' AND d.recname = 'PERSONAL_DTA_VW'; www.go-faster.co.uk

  30. But Which query? • One of these OPRID QRYNAME ----------------------------- ----------------------------- TRN002__SESSION_ROSTER TRN003__COURSE_WAITING_LIST • CAUTION: Unrestricted use of query will bring a system to its knees! • Users often clone public queries to their own private queries, and make a few tweaks. www.go-faster.co.uk

  31. Batch Programs • You know from the session • a batch program • which type of batch program • v$session.process • v$session.program www.go-faster.co.uk

  32. Cobol Stored Statement DELETE FROM PS_GP_PYE_STAT_WRK WHERE CAL_RUN_ID=:1 AND EMPLID BETWEEN :2 AND :3 ; • It is impossible to be certain by just looking at the SQL statement. www.go-faster.co.uk

  33. Cobol • Stored Statements • Delivered as Data Mover scripts • %PS_HOME%/src/cbl/base • Dynamic Statements • Strings built by Cobol programs during execution www.go-faster.co.uk

  34. Stored Statement STORE GPPCANCL_D_WRKSTAT DELETE FROM PS_GP_PYE_STAT_WRK WHERE CAL_RUN_ID=:1 AND EMPLID BETWEEN :2 AND :3 ; www.go-faster.co.uk

  35. Stored Statements • Stored statements usually contain bind variables • Dynamic statements sometimes contain literal values • But not always! • Individually named in timings report • Can be difficult to distinguish www.go-faster.co.uk

  36. PeopleTools Trace COBOL • Stored Statement • GETSTMT Stmt=FSPJCOMB_S_COMGRP, length=297 COM Stmt=SELECT A.PROCESS_GROUP … • Dynamic Statement • DYNAMIC Stmt=FSPJECHF_U_CFERROR COM Stmt=UPDATE PS_PSA_ACCTDSTGL SET … www.go-faster.co.uk

  37. Identify Stored Statements STORE GPPCANCL_D_WRKSTAT DELETE /*GPPCANCL_D_WRKSTAT*/ FROM PS_GP_PYE_STAT_WRK WHERE CAL_RUN_ID=:1 AND EMPLID BETWEEN :2 AND :3 ; www.go-faster.co.uk

  38. Identify Stored Statements • Stored in PS_SQLSTMT_TBL • Can add comment with PL/SQL • Download code for book • Ch.11: stmtid.sql (Oracle Only) • If you customise stored statements then add the comment manually to the .dms script • Remember to compare DMS scripts at upgrade time • The PeopleSoft documentation won’t remind you! www.go-faster.co.uk

  39. SQR • What you code is what you get • Search for the SQL in the SQR • And the included SQC files • Can also embed string variables in SQL • content of variable dynamically becomes a part of the SQL statement. • Source of hard parsing www.go-faster.co.uk

  40. SQR ... FROM PS_GP_CAL_RUN_DTL A, PS_GP_CALENDAR B, PS_GP_CAL_PRD C WHERE A.CAL_RUN_ID = $Cal_Run_ID [$Where] AND B.GP_PAYGROUP = A.GP_PAYGROUP AND B.CAL_ID = A.CAL_ID AND C.CAL_PRD_ID = B.CAL_PRD_ID ... www.go-faster.co.uk

  41. SQR let $Where = '' if not isblank($Paygroup) let $Where = ' AND GRP.GP_PAYGROUP = ''' || $Paygroup || '''' let $Where_B = ' AND B.GP_PAYGROUP = ''' || $Paygroup || '''' End-If www.go-faster.co.uk

  42. Hints in SQR Begin-Select On-Error=SQL-Error /*+ALL_ROWS*/ m.model_statement m.parmcount m.statement_type ... www.go-faster.co.uk

  43. Hints in SQR begin-SELECT DISTINCT on-Error=SQL-Error /*SYSRECORD-13*/ RECNAME &Record13_RecName if (((#current-line + 1) = #sqr-max-lines) and $DetailErrFound = 'Y') or ($DetailErrFound = 'N') move 'Y' to $DetailErrFound do PrintSectionHeadings end-if let #rows = #rows +1 print &Record13_RecName (+1,#Start1) FROM PSRECDEFN , (SELECT /*+ALL_ROWS*/ 'x' FROM DUAL) WHERE RECTYPE = 7 AND SQLTABLENAME <> ' ' ORDER BY RECNAME end-SELECT www.go-faster.co.uk

  44. Hints and Comments in SQR SELECT DISTINCT /*SYSRECORD-13*/ RECNAME FROM PSRECDEFN , (SELECT /*+ALL_ROWS*/ 'x' FROM DUAL) WHERE RECTYPE = 7 AND SQLTABLENAME <> ' ' ORDER BY RECNAME www.go-faster.co.uk

  45. SQR Cursor Status Report • -s parameter causes SQR to print cursor status report • after execution • Static SQL only • Parsed before execution begins. • If there is a syntax error in static SQL then program will fail immediately www.go-faster.co.uk

  46. SQR Cursor Status Report Cursor Status: … Cursor #34: SQL = SELECT substr(C.PRCSNAME, 1, 5), C.PRCSNAME FROM PS_PRCSDEFN C WHERE C.PRCSTYPE like 'SQR%' Compiles = 2 Executes = 1 Rows = 11 … www.go-faster.co.uk

  47. SQR Cursor Status Report www.go-faster.co.uk

  48. Application Engine SELECT SERVERNAME FROM PSSERVERSTAT WHERE SERVERNAME <> 'PSNT' AND SERVERSTATUS = '3' AND ( ROUND((( SYSDATE) - (LASTUPDDTTM)) * 1440, 0) < 10) / www.go-faster.co.uk

  49. Application Engine %Select(PRCSPURGE_AET.SERVERNAME) SELECT SERVERNAME FROM PSSERVERSTAT WHERE SERVERNAME <> %Bind(PRCSPURGE_AET.SERVERNAMERUN) AND SERVERSTATUS = '3' AND ( %DateTimeDiff(LASTUPDDTTM, %CurrentDateTimeIn) < 10) www.go-faster.co.uk

  50. Application Engine • Mostly, what you code is what you get • &Bind() variables mostly replaced with literal values • Lots of hard parsing • ReuseStatement attribute on AE step • From PeopleTools 8.x, rewritten in C++, and so can execute PeopleCode. • Bind variables in PeopleCode remain bind variables in SQL. www.go-faster.co.uk

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