Back2 basics - A Day In The Life Of An Oracle Analytics Query

1. Back2Basics A day in the life of an Oracle BI query www.dimensionality.ch @Nephentur #obihackers | freenode

2. • Owner of Dimensionality GmbH in Switzerland • Hacking OBI since 2001 (nQuire + Peregrin aquisitions by Siebel) • Oracle ACE Associate BI/DWH • Speaker at OpenWorld, KScope, regional Oracle User Groups... • Part-time blogger on Oracle BI (http://dimensionality.ch) • Full-time IRC (freenode | #obihackers) and OTN addict • Oracle BI trainer for Oracle University since 2006 • Proud geek and gamer • Responding to any and all questions 24 / 7 – especially on IRC Who am I? www.dimensionality.ch @Nephentur #obihackers | freenode

3. Who am I? www.dimensionality.ch @Nephentur #obihackers | freenode

4. Outline • Why this presentation • Overview / What the packaging says • VA / DV / DVD / BICS / ASCS • The actual day in the life of a query • Query execution details • Summary www.dimensionality.ch @Nephentur #obihackers | freenode

6. Why this presentation? • Oracle BI has matured and is quite wide-spread • As a result it’s often done worse than ever… • Problem being: core of a whole range of products • Hence: Back to basics presentation series • Not understanding and comprehending query mechanisms is a cardinal sin for any developer • And no, “cloud” doesn’t eliminate the need for “comprehension” www.dimensionality.ch @Nephentur #obihackers | freenode

7. Why this presentation? • Alternative title “A normal day on the OTN forums” www.dimensionality.ch @Nephentur #obihackers | freenode

8. Why this presentation? • Going more into details from my “Worst practices” presentation www.dimensionality.ch @Nephentur #obihackers | freenode

9. Why this presentation? • Alleviate your struggle • How can I get from front-end problems to the actual root cause? • Why is my report returning the data it does? • Why do I get old data back? (Spoiler alert: Cache!) • Where can I find all bits and pieces of information for my investigation? • Why doesn’t my request hit the source I thought it would? • Why does it bypass our aggregate tables? • If I change the RPD – what will be the impact? www.dimensionality.ch @Nephentur #obihackers | freenode

10. Why this presentation? Simply put: Without a solid understanding of how and why queries function inside the Oracle BI core you will have a very hard time of analyzing any issue pertaining to data, aggregations, modelling, performance etc. ! www.dimensionality.ch @Nephentur #obihackers | freenode

12. What the packaging says www.dimensionality.ch @Nephentur #obihackers | freenode

15. And “under the covers”? www.dimensionality.ch @Nephentur #obihackers | freenode Needs more detail…

16. A little archeology www.dimensionality.ch @Nephentur #obihackers | freenode

17. Wait, wait… www.dimensionality.ch @Nephentur #obihackers | freenode …did you just say “Siebel Analytics”; so what about versions?

21. VA / DV / DVD / BICS / ASCS? www.dimensionality.ch @Nephentur #obihackers | freenode But Christian it’s all about cloud, data visualization and mashups now! Surely I don’t need to bother with all this query stuff?

22. VA / DV / DVD / BICS? www.dimensionality.ch @Nephentur #obihackers | freenode

23. VA / DV / DVD / BICS? www.dimensionality.ch @Nephentur #obihackers | freenode

24. VA / DV / DVD / BICS? www.dimensionality.ch @Nephentur #obihackers | freenode But Christian it’s all about data visualization and mashups now! Surely I don’t need to bother with all this?

25. So what about VA / DV / DVD / BICS? www.dimensionality.ch @Nephentur #obihackers | freenode Yes DV/ASCS/BICS are way(s) forward, but… Really? Think about it: • They all still access Subject Areas (indirectly) • Performance problems won’t just automagically disappear – You’ll probably run into even more thanks to mashups and file uploads • Just because there are nice graphs doesn’t mean there isn’t still a very clever system in the background! • But yes, there’s a new toy and new possibilities • Watch out for the next dissection talk!

26. So what about VA / DV / DVD / BICS? www.dimensionality.ch @Nephentur #obihackers | freenode Yes VA, DV and DVD are the way forward, but… Really? Think about it: • They all still access Subject Areas (indirectly) • Performance problems won’t just automagically disappear – You’ll probably run into even more thanks to mashups and file uploads • Just because there are nice graphs doesn’t mean there isn’t still a very clever system in the background! • But yes, there’s a new toy and new possibilities • Watch out for the next dissection talk!

28. The workday www.dimensionality.ch @Nephentur #obihackers | freenode ?

29. This is where very few magic should happen This is where THE magic happens We don’t really care about this part This is where the actual workload should happen “The workday” aka detailed query flow www.dimensionality.ch @Nephentur #obihackers | freenode Browser, SmartView, other tools BI Server WLS Managed Server Presentation Server Sources Browser, SmartView, other tools BI Server WLS Managed Server Presentation Server

30. To this detail architectureMapping these flow details in the BI Server “Magic” details www.dimensionality.ch @Nephentur #obihackers | freenode

31. Your friend the log www.dimensionality.ch @Nephentur 12c: obis1-query.log 11g: nqquery.log #obihackers | freenode

32. Your friend the log www.dimensionality.ch @Nephentur 12c: obis1-query.log 11g: nqquery.log -------------------- SQL Request, logical request hash:a180d345SET VARIABLE OBIS_REFRESH_CACHE=1,QUERY_SRC_CD='Report',SAW_SRC_PATH='/users/web logic/Preso/Main',PREFERRED_CURRENCY='USD',DISABLE_CACHE=1,LOG_LEVEL= 2; SELECT 0 s_0, "D - Sample Federated"."Time"."T05 Per Name Year" s_1, "D - Sample Federated"."Measures"."1a- Revenue (Orcl Db Tables Only)" s_2 FROM "D - Sample Federated" ORDER BY 2 ASC NULLS LAST FETCH FIRST 5000001 ROWS ONLY #obihackers | freenode

33. Your friend the log www.dimensionality.ch @Nephentur 12c: obis1-query.log 11g: nqquery.log -------------------- SQL Request, logical request hash:a180d345SET VARIABLE OBIS_REFRESH_CACHE=1,QUERY_SRC_CD='Report',SAW_SRC_PATH='/users/web logic/Preso/Main',PREFERRED_CURRENCY='USD',DISABLE_CACHE=1,LOG_LEVEL= 2; SELECT 0 s_0, "D - Sample Federated"."Time"."T05 Per Name Year" s_1, "D - Sample Federated"."Measures"."1a- Revenue (Orcl Db Tables Only)" s_2 FROM "D - Sample Federated" ORDER BY 2 ASC NULLS LAST FETCH FIRST 5000001 ROWS ONLY [2016-05-27T13:40:38.29+00:00] [OBIS] [TRACE:3] [] [] [ecid: aa89eaf6-8094- 45b1-8c59-ea46b2a1e14e-00008dd6,0:1:17:5] [sik: ssi] [tid: 996f4700] [messageid: USER-18] [requestid: e295001d] [sessionid: e2950000] [username: weblogic] -------------------- Sending query to database named 01 - Sample App Data (ORCL) (id: <<387385>>), connection pool named Sample Relational Connection, logical request hash a180d345, physical request hash f5274c5e: [[ WITH SAWITH0 AS (select sum(T418.Revenue) as c1, T653.Per_Name_Year as c2 From BISAMPLE.SAMP_TIME_MTH_D T653 /* D02 Time Month Grain */ , BISAMPLE.SAMP_REVENUE_F T418 /* F10 Billed Rev */ where ( T418.Bill_Mth_Key = T653.Mth_Key ) group by T653.Per_Name_Year)select D1.c1 as c1, D1.c2 as c2, D1.c3 as c3 from ( select 0 as c1, D1.c2 as c2, D1.c1 as c3from SAWITH0 D1order by c2 ) D1 where rownum <= 5000001 #obihackers | freenode

35. Intelligent Request Generation www.dimensionality.ch @Nephentur #obihackers | freenode • Receives the queries from the front-end • Answers, SmartView, Visual Analyzer, Data Visualization (Desktop) • Other tools using the Oracle BI Server ODBC API or Web Servives

36. Logical Request Generation www.dimensionality.ch @Nephentur #obihackers | freenode • Creates the actual logical request to be processed • Doesn’t “write the query” • Doesn’t decide which business models, LTSs or sources to use • Preparation stage for Cache Services and Navigator

37. Logical Request Generation www.dimensionality.ch @Nephentur #obihackers | freenode -------------------- SQL Request, logical request hash: ee9cf87d SET VARIABLE OBIS_REFRESH_CACHE=1,QUERY_SRC_CD='Report',SAW_SRC_PATH='/users/weblogic/Preso/Main',PREFER RED_CURRENCY='USD',DISABLE_CACHE=1,LOG_LEVEL=5; SELECT 0 s_0, "D - Sample Federated"."Time"."T05 Per Name Year" s_1, "D - Sample Federated"."Measures"."1a- Revenue (Orcl Db Tables Only)" s_2, "D - Sample Federated"."Measures"."1b- Revenue (Essbase Cube Only)" s_3 FROM "D - Sample Federated" ORDER BY 2 ASC NULLS LAST FETCH FIRST 5000001 ROWS ONLY

38. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode • Optional step: Caching enabled? • Checks if request can be fulfilled by existing cache entries • Cache doesn’t need to match 1:1 – Existing entries can be aggregated – Subsets can be extracted • Cache can be forcibly circumvented

39. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode • Optional step: Caching enabled? • Checks if request can be fulfilled by existing cache entries • Cache doesn’t need to match 1:1 – Existing entries can be aggregated – Subsets can be extracted • Cache can be forcibly circumvented

40. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode • Optional step: Caching enabled? • Checks if request can be fulfilled by existing cache entries • Cache doesn’t need to match 1:1 – Existing entries can be aggregated – Subsets can be extracted • Cache can be forcibly circumvented-------------------- SQL Request, logical request hash: ee9cf87d SET VARIABLE OBIS_REFRESH_CACHE=1,QUERY_SRC_CD='Report',SAW_SRC_PATH='/users/weblogic/Preso/Main',PREFER RED_CURRENCY='USD',DISABLE_CACHE=1,LOG_LEVEL=5; […] ORDER BY 2 ASC NULLS LAST FETCH FIRST 5000001 ROWS ONLY

41. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode • All SELECT columns – Existing in cache entries or – Derived from cache entries (bins, substring or other analysis-based formulas/functions) • WHERE clause must match or be a subset of cache entries – Query for 10 US states will hit a cache entry containing all the US states • Join conditions must match or be a subset

42. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode

43. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:18:40.151+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6- dd95618de970-000006a9,0:1:23:5] [sik: ssi] [tid: df80700] [messageid: USER-18] [requestid: f7340009] [sessionid: f7340000] [username: weblogic] -------------------- Sending query to database named 01 - Sample App Data (ORCL) (id: <<112556>>), connection pool named Sample Relational Connection, logical request hash e019650e, physical request hash 61dd43b2: [[ WITH SAWITH0 AS (select distinct T795.PER_NAME_YEAR as c1 from BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ ) select D1.c1 as c1, D1.c2 as c2 from ( select 0 as c1, D1.c1 as c2 from SAWITH0 D1 order by c2 ) D1 where rownum <= 5000001

44. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:18:40.151+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6- dd95618de970-000006a9,0:1:23:5] [sik: ssi] [tid: df80700] [messageid: USER-18] [requestid: f7340009] [sessionid: f7340000] [username: weblogic] -------------------- Sending query to database named 01 - Sample App Data (ORCL) (id: <<112556>>), connection pool named Sample Relational Connection, logical request hash e019650e, physical request hash 61dd43b2: [[ WITH SAWITH0 AS (select distinct T795.PER_NAME_YEAR as c1 from BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ ) select D1.c1 as c1, D1.c2 as c2 from ( select 0 as c1, D1.c1 as c2 from SAWITH0 D1 order by c2 ) D1 where rownum <= 5000001 [2016-05-28T15:18:40.182+00:00] [OBIS] [TRACE:3] [] [] [ecid: 005D_Wap^cJFw000jzwkno0001Qq000EG0,0] [sik: ssi] [tid: 6fe3700] [messageid: USER-27] [requestid: f7340009] [sessionid: f7340000] [username: weblogic] -------------------- Total Cache elapsed time 0.028 (seconds) [2016-05-28T15:18:40.183+00:00] [OBIS] [TRACE:3] [] [] [ecid: 005D_Wap^cJFw000jzwkno0001Qq000EG0,0] [sik: ssi] [tid: 6fe3700] [messageid: USER-42] [requestid: f7340009] [sessionid: f7340000] [username: weblogic] -------------------- Query Result Cache: [59124] The query for user 'weblogic' was inserted into the query result cache. The filename is '/app/oracle/biee/user_projects/domains/bi/servers/obis1/cache/NQS__736145_55120_0.TBL'. [2016-05-28T15:18:40.183+00:00] [OBIS] [TRACE:3] [] [] [ecid: 005D_Wap^cJFw000jzwkno0001Qq000EG0,0] [sik: ssi] [tid: 6fe3700] [messageid: USER-50] [requestid: f7340009] [sessionid: f7340000] [username: weblogic] -------------------- The logical query seeds the plan cache [[ plan RqList <<307721>> [for database 0:0,9] T1.1 as c1 [for database 0:0,9], T1.2 as c2 [for database 0:0,9] Child Nodes (RqJoinSpec): <<307730>> [for database 0:0,1] RqJoinNode <<307729>> [] CacheTable T1

45. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode

46. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:31:22.112+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:24:5] [sik: ssi] [tid: de7b700] [messageid: USER-21] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Cache Hit on query: [[ Matching Query: SET VARIABLE OBIS_REFRESH_CACHE=1,QUERY_SRC_CD='Report',SAW_DASHBOARD='/users/weblogic/_portal',SAW_DASHBOARD_PG='page 1',SAW_SRC_PATH='/users/weblogic/Preso/Cache Hit',PREFERRED_CURRENCY='USD';SELECT 0 s_0, "A - Sample Sales"."Time"."T05 Per Name Year" s_1 FROM "A - Sample Sales" ORDER BY 2 ASC NULLS LAST FETCH FIRST 5000001 ROWS ONLY Created by: weblogic ]] [2016-05-28T15:31:22.114+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:24:5] [sik: ssi] [tid: de7b700] [messageid: USER-55] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Order By Safely Removed [[ 'OrderBy: D1.c2 asc NULLS LAST [ added for join ] ' above the cache hit plan is safely dropped due to the preserved order by ' OrderBy: c2 asc NULLS LAST' from cache entry

47. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:31:22.114+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:24:5] [sik: ssi] [tid: de7b700] [messageid: USER-50] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- The logical query seed the plan cache [[ plan RqList <<120136>> [for database 0:0,0] /* FETCH FIRST 5000001 ROWS ONLY */ 0 as c1 [for database 0:0,1], D1.c2 as c2 [for database 0:0,0] Child Nodes (RqJoinSpec): <<120142>> [for database 0:0,0] RqJoinNode <<120143>> [] ( RqList <<120146>> [for database 0:0,9] T1.2 as c2 [for database 0:0,9], T1.2 as c3 [for database 0:0,9] Child Nodes (RqJoinSpec): <<120152>> [for database 0:0,9] RqJoinNode <<120153>> [] CacheTable T1 ) as D1 DetailFilter: not D1.c3 < '2012' [for database 0:0,0]

48. Cache Services www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:31:22.139+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:28] [sik: ssi] [tid: de7b700] [messageid: USER-34] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Query Status: Successful Completion [2016-05-28T15:31:22.139+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:28] [sik: ssi] [tid: de7b700] [messageid: USER-29] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Physical Query Summary Stats: Number of physical queries 1, Cumulative time 0.000, DB-connect time 0.000 (seconds) [2016-05-28T15:31:22.139+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:28] [sik: ssi] [tid: de7b700] [messageid: USER-24] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Rows returned to Client 2 [2016-05-28T15:31:22.139+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970-00000820,0:1:28] [sik: ssi] [tid: de7b700] [messageid: USER-33] [requestid: f7340014] [sessionid: f7340000] [username: weblogic] -------------------- Logical Query Summary Stats: Elapsed time 0.030, Total time in BI Server 0.029, Execution time 0.008, Response time 0.029, Compilation time 0.007 (seconds), logical request hash 48047dfa

49. Navigator www.dimensionality.ch @Nephentur #obihackers | freenode • The true brain of the operation • Parses BI Server metadata • Decides on actual logical tables, logical table sources etc. • Uses 3 components to decide on details – Multi-pass / sub-request – Fragmentation – Aggregates

50. Multi-pass / sub-request www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-27T14:28:54.799+00:00] [OBIS] [TRACE:3] [] [] [ecid: aa89eaf6-8094-45b1-8c59-ea46b2a1e14e-000092ae,0:1:9:3] [sik: ssi] [tid: 996f4700] [messageid: USER-23] [requestid: af740029] [sessionid: af740000] [username: weblogic] -------------------- General Query Info: [[ Repository: ssi, Subject Area: 06 - Federated Sources, Presentation: D - Sample Federated ]] [2016-05-27T14:28:54.800+00:00] [OBIS] [TRACE:3] [] [] [ecid: aa89eaf6-8094-45b1-8c59-ea46b2a1e14e-000092ae,0:1:9:3] [sik: ssi] [tid: 996f4700] [messageid: USER-2] [requestid: af740029] [sessionid: af740000] [username: weblogic] -------------------- Logical Request (before navigation): [[ RqList [1] 0 as c1 GB, D0 Time.T05 Per Name Year as c2 GB, 1a- Revenue (Orcl Db Tables Only):[DAggr(F0 Revenue Base Measures.1a- Revenue (Orcl Db Tables Only) by [ D0 Time.T05 Per Name Year] )] as c3 GB, 1b- Revenue (Essbase Cube Only):[DAggr(F0 Revenue Base Measures.1b- Revenue (Essbase Cube Only) by [ D0 Time.T05 Per Name Year] )] as c4 GB OrderBy: c2 asc NULLS LAST

51. Multi-pass / sub-request www.dimensionality.ch @Nephentur #obihackers | freenode RqBreakFilter <<390156>>[2] [for database 0:0,0] /* FETCH FIRST 5000001 ROWS ONLY */ RqList <<390157>> [for database 0:0,0] 0 as c1 GB [for database 0:0,1], D901.c5 as c2 GB [for database 0:0,0], D901.c1 as c3 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D901.c2 as c4 GB [for database 0:0,0] Child Nodes (RqJoinSpec): <<390167>> [for database 0:0,0] RqJoinNode <<390168>> [] ( RqList <<390171>> [for database 0:0,0] D1.c1 as c1 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D2.c1 as c2 GB [for database 0:0,0], coalesce( D1.c2 , D2.c2) as c5 GB [for database 0:0,0] Child Nodes (RqJoinSpec): <<390181>> [for database 0:0,0] RqJoinNode <<390182>> [] ( RqList <<390186>> [for database 3023:28:01 - Sample App Data (ORCL),78] sum(F10 Billed Rev.Revenue by [ D02 Time Month Grain.Per_Name_Year] ) as c1 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D02 Time Month Grain.Per_Name_Year as c2 GB [for database 3023:28:01 - Sample App Data (ORCL),78] Child Nodes (RqJoinSpec): <<390195>> [for database 3023:28:01 - Sample App Data (ORCL),78] RqJoinNode <<390196>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_TIME_MTH_D AS D02 Time Month Grain RqJoinNode <<390199>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_REVENUE_F AS F10 Billed Rev DetailFilter: F10 Billed Rev.Bill_Mth_Key = D02 Time Month Grain.Mth_Key [for database 3023:28:01 - Sample App Data (ORCL),78] GroupBy: [ D02 Time Month Grain.Per_Name_Year] [for database 3023:28:01 - Sample App Data (ORCL),78] OrderBy: c2 asc [for database 3023:28:01 - Sample App Data (ORCL),78] ) as D1 FullOuterStitchJoin <<390183>> On D1.c2 = D2.c2; actual join vectors: [ 1 ] = [ 1 ] ( RqList <<390215>> [for database 0:0,0] distinct D1.c1 as c1 [for database 0:0,0], D1.c2 as c2 [for database 0:0,0] Child Nodes (RqJoinSpec): <<390221>> [for database 0:0,0] RqJoinNode <<390222>> [] ( RqList <<390225>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] sum(Sample Flattened.Gross Revenue by [ Sample Flattened.Years] ) as c1 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84], Sample Flattened.Years as c2 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84] Child Nodes (RqJoinSpec): <<390234>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] RqJoinNode <<390235>> [] Sample T12016 GroupBy: [ Sample Flattened.Years] [for database 3023:10:03 - Essbase Sample E1 Flat,84] ) as D1 OrderBy: c2 asc [for database 0:0,0] ) as D2 OrderBy: c5 asc NULLS LAST [for database 0:0,0] ) as D901

52. Multi-pass / sub-request www.dimensionality.ch @Nephentur #obihackers | freenode RqBreakFilter <<390156>>[2] [for database 0:0,0] /* FETCH FIRST 5000001 ROWS ONLY */ RqList <<390157>> [for database 0:0,0] 0 as c1 GB [for database 0:0,1], D901.c5 as c2 GB [for database 0:0,0], D901.c1 as c3 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D901.c2 as c4 GB [for database 0:0,0] Child Nodes (RqJoinSpec): <<390167>> [for database 0:0,0] RqJoinNode <<390168>> [] ( RqList <<390171>> [for database 0:0,0] D1.c1 as c1 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D2.c1 as c2 GB [for database 0:0,0], coalesce( D1.c2 , D2.c2) as c5 GB [for database 0:0,0] Child Nodes (RqJoinSpec): <<390181>> [for database 0:0,0] RqJoinNode <<390182>> [] ( RqList <<390186>> [for database 3023:28:01 - Sample App Data (ORCL),78] sum(F10 Billed Rev.Revenue by [ D02 Time Month Grain.Per_Name_Year] ) as c1 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D02 Time Month Grain.Per_Name_Year as c2 GB [for database 3023:28:01 - Sample App Data (ORCL),78] Child Nodes (RqJoinSpec): <<390195>> [for database 3023:28:01 - Sample App Data (ORCL),78] RqJoinNode <<390196>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_TIME_MTH_D AS D02 Time Month Grain RqJoinNode <<390199>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_REVENUE_F AS F10 Billed Rev DetailFilter: F10 Billed Rev.Bill_Mth_Key = D02 Time Month Grain.Mth_Key [for database 3023:28:01 - Sample App Data (ORCL),78] GroupBy: [ D02 Time Month Grain.Per_Name_Year] [for database 3023:28:01 - Sample App Data (ORCL),78] OrderBy: c2 asc [for database 3023:28:01 - Sample App Data (ORCL),78] ) as D1 FullOuterStitchJoin <<390183>> On D1.c2 = D2.c2; actual join vectors: [ 1 ] = [ 1 ] ( RqList <<390215>> [for database 0:0,0] distinct D1.c1 as c1 [for database 0:0,0], D1.c2 as c2 [for database 0:0,0] Child Nodes (RqJoinSpec): <<390221>> [for database 0:0,0] RqJoinNode <<390222>> [] ( RqList <<390225>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] sum(Sample Flattened.Gross Revenue by [ Sample Flattened.Years] ) as c1 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84], Sample Flattened.Years as c2 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84] Child Nodes (RqJoinSpec): <<390234>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] RqJoinNode <<390235>> [] Sample T12016 GroupBy: [ Sample Flattened.Years] [for database 3023:10:03 - Essbase Sample E1 Flat,84] ) as D1 OrderBy: c2 asc [for database 0:0,0] ) as D2 OrderBy: c5 asc NULLS LAST [for database 0:0,0] ) as D901 RqBreakFilter <<390156>>[2] [for database 0:0,0] /* FETCH FIRST 5000001 ROWS ONLY */ ( ( RqList <<390186>> [for database 3023:28:01 - Sample App Data (ORCL),78] sum(F10 Billed Rev.Revenue by [ D02 Time Month Grain.Per_Name_Year] ) as c1 GB [for database 3023:28:01 - Sample App Data (ORCL),78], D02 Time Month Grain.Per_Name_Year as c2 GB [for database 3023:28:01 - Sample App Data (ORCL),78] Child Nodes (RqJoinSpec): <<390195>> [for database 3023:28:01 - Sample App Data (ORCL),78] RqJoinNode <<390196>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_TIME_MTH_D AS D02 Time Month Grain RqJoinNode <<390199>> [(InNode:<<390196>>) (OutNode:<<390199>>) ] SAMP_REVENUE_F AS F10 Billed Rev DetailFilter: F10 Billed Rev.Bill_Mth_Key = D02 Time Month Grain.Mth_Key [for database 3023:28:01 - Sample App Data (ORCL),78] GroupBy: [ D02 Time Month Grain.Per_Name_Year] [for database 3023:28:01 - Sample App Data (ORCL),78] OrderBy: c2 asc [for database 3023:28:01 - Sample App Data (ORCL),78] ) as D1 FullOuterStitchJoin <<390183>> On D1.c2 = D2.c2; actual join vectors: [ 1 ] = [ 1 ] ( RqList <<390215>> [for database 0:0,0] distinct D1.c1 as c1 [for database 0:0,0], D1.c2 as c2 [for database 0:0,0] Child Nodes (RqJoinSpec): <<390221>> [for database:0,0] RqJoinNode <<390222>> [] ( RqList <<390225>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] sum(Sample Flattened.Gross Revenue by [ Sample Flattened.Years] ) as c1 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84], Sample Flattened.Years as c2 GB [for database 3023:10:03 - Essbase Sample E1 Flat,84] Child Nodes (RqJoinSpec): <<390234>> [for database 3023:10:03 - Essbase Sample E1 Flat,84] RqJoinNode <<390235>> [] Sample T12016 GroupBy: [ Sample Flattened.Years] [for database 3023:10:03 - Essbase Sample E1 Flat,84] ) as D1 ) as D2 ) as D901

53. Multi-pass / sub-request www.dimensionality.ch @Nephentur #obihackers | freenode

59. Multi-pass / sub-request www.dimensionality.ch @Nephentur #obihackers | freenode [2016-05-28T15:54:26.741+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970- 00000be7,0:1:1:5] [sik: ssi] [tid: de7b700] [messageid: USER-18] [requestid: f7340057] [sessionid: f7340000] [username: weblogic] -------------------- Sending query to database named 01 - Sample App Data (ORCL) (id: <<128861>>), connection pool named Sample Relational Connection, logical request hash c0e3e3eb, physical request hash f6e07fd4: [[ select sum(T432.Revenue_Usd) as c1, T795.PER_NAME_YEAR as c2 from BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ , BISAMPLE.SAMP_REVENUE_CURR_F T432 /* F19 Rev. (Converted) */ where ( T432.Bill_Qtr_Key = T795.QTR_KEY ) group by T795.PER_NAME_YEAR order by c2 ]] [2016-05-28T15:54:26.742+00:00] [OBIS] [TRACE:3] [] [] [ecid: 86cb6a39-9f56-4305-a0e6-dd95618de970- 00000be7,0:1:1:5] [sik: ssi] [tid: de7b700] [messageid: USER-18] [requestid: f7340057] [sessionid: f7340000] [username: weblogic] -------------------- Sending query to database named 01 - Sample App Data (ORCL) (id: <<128903>>), connection pool named Sample Relational Connection, logical request hash c0e3e3eb, physical request hash 343379a9: [[ select sum(T216.Revenue) as c1, T795.PER_NAME_YEAR as c2 from BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ , BISAMPLE.SAMP_REVENUE_FA2 T216 /* F21 Rev. (Aggregate 2) */ where ( T216.Bill_Qtr_Key = T795.QTR_KEY ) group by T795.PER_NAME_YEAR order by c2

60. Fragmentation www.dimensionality.ch @Nephentur #obihackers | freenode • Are fragmented logical table sources being used?

61. Fragmentation www.dimensionality.ch @Nephentur #obihackers | freenode • Are fragmented logical table sources being used? [...] RqJoinNode <<406134>> [] (( RqList <<406138>> [for database 3023:16:Y01 - Custom Demo Datasets,78] WEATHER_HAIL.STATE as c2 [for database 3023:16:Y01 - Custom Demo Datasets,78], 'Hail' as c3 [for database 3023:16:Y01 - Custom Demo Datasets,78], WEATHER_HAIL.ID as c4 [for database 3023:16:Y01 - Custom Demo Datasets,78] Child Nodes (RqJoinSpec): <<406146>> [for database 3023:16:Y01 - Custom Demo Datasets,78] RqJoinNode <<406147>> [] WEATHER_HAIL T403 RqUnion All <<406137>> [for database 3023:16:Y01 - Custom Demo Datasets,78] RqList <<406150>> [for database 3023:16:Y01 - Custom Demo Datasets,78] WEATHER_TORNADOES.STATE as c2 [for database 3023:16:Y01 - Custom Demo Datasets,78], 'Tornado' as c3 [for database 3023:16:Y01 - Custom Demo Datasets,78], WEATHER_TORNADOES.ID as c4 [for database 3023:16:Y01 - Custom Demo Datasets,78] Child Nodes (RqJoinSpec): <<406158>> [for database 3023:16:Y01 - Custom Demo Datasets,78] RqJoinNode <<406159>> [] WEATHER_TORNADOES T525 RqUnion All <<406137>> [for database 3023:16:Y01 - Custom Demo Datasets,78] RqList <<406162>> [for database 3023:16:Y01 - Custom Demo Datasets,78] WEATHER_WIND.STATE as c2 [for database 3023:16:Y01 - Custom Demo Datasets,78], 'Wind' as c3 [for database 3023:16:Y01 - Custom Demo Datasets,78], WEATHER_WIND.ID as c4 [for database 3023:16:Y01 - Custom Demo Datasets,78] Child Nodes (RqJoinSpec): <<406170>> [for database 3023:16:Y01 - Custom Demo Datasets,78] RqJoinNode <<406171>> [] WEATHER_WIND T375) ) as D6 [...]

62. Fragmentation www.dimensionality.ch @Nephentur #obihackers | freenode

63. Fragmentation www.dimensionality.ch @Nephentur #obihackers | freenode • Are fragmented logical table sources being used?

64. Aggregate Navigator www.dimensionality.ch @Nephentur #obihackers | freenode • Which LTS contains data on a level of aggregation to fulfill the query with the least amount of effort? • Hierarchy logical level # of elements • LTS priority group • LTS order

65. Aggregate Navigator www.dimensionality.ch @Nephentur #obihackers | freenode

66. Aggregate Navigator www.dimensionality.ch @Nephentur #obihackers | freenode WITH SAWITH0 AS (select sum(T216.Revenue) as c1, T795.PER_NAME_YEAR as c2 from BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ ,BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ ,BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ ,BISAMPLE.SAMP_TIME_QTR_D T795 /* D03 Time Quarter Grain */ , BISAMPLE.SAMP_REVENUE_FA2 T216 /* F21 Rev. (Aggregate 2) */ where ( T216.Bill_Qtr_Key = T795.QTR_KEY ) group by T795.PER_NAME_YEAR) select D1.c1 as c1, D1.c2 as c2, D1.c3 as c3 from ( select 0 as c1, D1.c2 as c2, D1.c1 as c3 from SAWITH0 D1 order by c2 ) D1 where rownum <= 5000001

67. Aggregate Navigator www.dimensionality.ch @Nephentur #obihackers | freenode

68. Aggregate Navigator www.dimensionality.ch @Nephentur #obihackers | freenode WITH SAWITH0 AS (select sum(T418.Revenue) as c1, T42.Calendar_Date as c2, T42.Per_Name_Year as c3 from BISAMPLE.SAMP_TIME_DAY_D T42 /* D01 Time Day Grain */ ,BISAMPLE.SAMP_TIME_DAY_D T42 /* D01 Time Day Grain */ ,BISAMPLE.SAMP_TIME_DAY_D T42 /* D01 Time Day Grain */ ,BISAMPLE.SAMP_TIME_DAY_D T42 /* D01 Time Day Grain */ , BISAMPLE.SAMP_REVENUE_F T418 /* F10 Billed Rev */ where ( T42.Calendar_Date = T418.Bill_Day_Dt and T42.Per_Name_Year = '2012' ) group by T42.Calendar_Date, T42.Per_Name_Year) select D1.c1 as c1, D1.c2 as c2, D1.c3 as c3, D1.c4 as c4 from ( select 0 as c1, D1.c2 as c2, D1.c3 as c3, D1.c1 as c4 from SAWITH0 D1 order by c3, c2 ) D1 where rownum <= 5000001

69. Optimized Query Rewrites www.dimensionality.ch @Nephentur #obihackers | freenode • Writes the effective query sent against a source • Source type • Source features • Native function shipping driven by these configurations (and version)

70. Optimized Query Rewrites www.dimensionality.ch @Nephentur #obihackers | freenode

71. Optimized Query Rewrites www.dimensionality.ch @Nephentur #obihackers | freenode

72. Optimized Query Rewrites www.dimensionality.ch @Nephentur #obihackers | freenode • Results are retrieved from sources • Combined and post-calculated as needed • Written into the cache • Passed to the initially calling interface

74. Summary www.dimensionality.ch @Nephentur #obihackers | freenode 1. Know the flow This is where very few magic should happen This is where THE magic happens We don’t really care about this part This is where the actual workload should happen Browser, SmartView, other tools BI Server WLS Managed Server Presentation Server Sources Browser, SmartView, other tools BI Server WLS Managed Server Presentation Server

75. Summary 2. Understand the magic

76. Summary 3. You’ll be fine!

77. www.dimensionality.ch @Nephentur #obihackers | freenode

Back2 basics - A Day In The Life Of An Oracle Analytics Query

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