SQL model fibonacci
Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE Production 11.2.0.3.0
AMT for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
Hi there thank you in advance. I learn the sql model and try this fibonacci:
SELECT x, s
OF THE DOUBLE
MODEL OF RETURN ALL ROWS
DIMENSION (1 x)
MEASURES (0 s AS)
IGNORE THE NAV
RULES
(s [1] = 0,)
s [2] = 1;
s [BETWEEN 3 AND 5 x] = s [x = cv (x)-1] + s [x = cv (x) - 2])
but it stops after printing 2 rows:
| 1 | 0 |
| 2 | 1 |
My question is: why the third rule s [BETWEEN 3 AND 5 x] = s [x = cv (x)-1] + s [x = cv (x) - 2]) does not work?
It is positional and symbolic references.
Creation of new cells only works for positional references.
s [x > 3] is a reference to symboic that x is the symbol of the dimension.
s [3] is a positional reference.
References in the loops FOR are considered to be positional referecenes, even if they are formulated using symbols.
1 x SELECT, s
2 FROM TWO
MODEL 3 RETURNS ALL ROWS
4 DIMENSION BY (1 x)
5 MEASURES (0 s AS)
6 SKIP NAV
7 RULES
8 (s [1] = 0,
9 s [2] = 1,
10 s upsert [3] = 1
11)
12 * order by s
X S ---------- ----------
1 0 2 1 3 1
Tags: Database
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Thank you for reading I'm waiting for suggestions to improve the performance of this statement.select * from table(dbms_xplan.display_cursor('474frsqbc1n4d', null, 'ALLSTATS LAST')); PLAN_TABLE_OUTPUT SQL_ID 474frsqbc1n4d, child number 0 ------------------------------------- SELECT /*+ gather_plan_statistics */ c.* FROM table_a c INNER JOIN table_a_b ab ON c.id = ab.media_fk WHERE ab.channel_fk IN (7, 1) Plan hash value: 3781163428 --------------------------------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | Writes | OMem | 1Mem | Used-Mem | --------------------------------------------------------------------------------------------------------------------------------------------------- |* 1 | HASH JOIN | | 1 | 1352K| 1050 |00:00:40.93 | 198K| 182K| 209K| 29M| 5266K| 3320K (1)| |* 2 | INDEX FAST FULL SCAN| SYS_IOT_TOP_316310 | 1 | 1352K| 1336K|00:00:01.34 | 10874 | 0 | 0 | | | | | 3 | TABLE ACCESS FULL | TABLE_A | 1 | 2190K| 2267K|00:02:45.56 | 187K| 182K| 0 | | | | --------------------------------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 1 - access(""AB"".""MEDIA_FK""=""C"".""ID"") 2 - filter((""AB"".""CHANNEL_FK""=1 OR ""AB"".""CHANNEL_FK""=7))
-----
H3. Backgroud
There are many years my company made decided to maintain many-to-many relationships in our database using pipe delimited fields. An example of field value:
Each delimited value refers to a unique "short" code TABLE_B (there is also a real digital foreign key to TABLE_B, which is what I use in the junction table). We are regularly using these columns with the next SQL style:'|ABC|XYZ|VTR|DVD|'
Appropriate indexes have been created over the years to make this process as soon a possible.... WHERE INSTR(pipedcolumn, '|ABC|') > 0 OR INSTR(pipedcolumn, '|XYZ|' > 0 ...
We now have an opportunity to correct some of these errors of design and implementation of junction tables to replace the current field. Before that, we have decided to take a copy of a database to a client with the largest set of records and test. I created a new junction table:
And the analysis on a pipe delimited field, populated by this new table.TABLE_A_B DDL: CREATE TABLE TABLE_A_B ( media_fk NUMBER, channel_fk NUMBER, PRIMARY KEY (media_fk, channel_fk), FOREIGN KEY (media_fk) REFERENCES TABLE_A (ID), FOREIGN KEY (channel_fk) REFERENCES TABLE_B (ID) ) ORGANIZATION INDEX COMPRESS; CREATE INDEX C_M_INDEX ON TABLE_A_B (channel_fk, media_fk) COMPRESS;
I then compared the performance of the following SQL:
When x, y, n are values that occur less frequently in the TABLE_A_B.CHANNEL_FK performance are comparable. However once the frequency of x, y, n increases, performance suffers. Here is a summary of the data CHANNEL_FK in TABLE_A_B:SELECT a.* FROM table_a a INNER JOIN table_a_b ab ON a.id = ab.media_fk WHERE ab.channel_fk IN (x, y, n); -- Can be Many Minutes --vs. SELECT a.* FROM table_a a WHERE INSTR(OWNERS,'|x|') >0 OR INSTR(OWNERS,'|y|') >0 OR INSTR(OWNERS,'|n|') >0; -- About 1 second seemingly regardless
I noticed that whenever I use any combination of values that occur over approximately 800 000 times (i.e. IN (7, 1) = 780741 + 555407 = 1336148) then I get performance problems.--SQL For Summary Data SELECT channel_fk, count(channel_fk) FROM table_a_b GROUP BY channel_fk ORDER BY COUNT(channel_fk) DESC; CHANNEL_FK COUNT(CHANNEL_FK) ---------------------- ---------------------- 7 780741 1 555407 2 422493 3 189493 169 144663 9 79457 6 53051 171 28401 170 19857 49 12603 ...
I find it very difficult to accept that the old pipe delimited fields are a better solution (without taking into account any other than this search criterion!).
Thank you for reading this far. I really look forward to suggestions on how to improve the performance of this statement.
Published by: user1950227 on October 1, 2012 12:06
Table of link renamed in DDL.davebcast wrote:
The following SQL statement has been identified as a bad performance. It takes ~ 160 seconds to run, but similar (indicated below first statement) SQL statements run in ~ 1 second.
Keep in mind that the enforcement timeframe has elapsed is a poor metric to use for benchmarking of SQL. The reason is that the same workload does not mean that the same elapsed execution time.
The workload for example shows a block of 1000 readings. There will be a difference marked by this workload reading data of the slow physical disks, or making this workload by reading data from memory in memory cache. And if it happens to be in memory or on disk is a kind of "random" thing (depends on many environment and factors of execution).
Thus, rather than measure the elapsed time and use it to compare, rather compare actual workloads. A workload of 500 block reading is faster and better than a block of 1000 DSL - despite the fact that a point of elapsed time can show the 500 read being slow (e/s physical) block a block of 1000 to read (e/s logic).
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Formula of number first in PL/SQL
Hi friends,
Oracle 11.2.0.1
Windows XP Prof
Two questions, but almost of the same nature:
1. is there a formula by which we can get the total number of numbers first to a number given; I mean suppose I said 10, it means he must return 3; that is, there are total 3 prime number between 1 and 10.
Here I use a function that will tell me that a number is first or not, and I will make a loop to the given number. But this isn't really a formula, that kind of calculation. I'm looking for a formula fixed matehematical if there is or not. If exists, then how this PL/SQL block looks.
2 suppose I want to get 50 numbers first (starting from 1), then what will be the 50th prime number, I mean up to highest number my calculation will be expanded.
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I thought: Let me write here.
Concerning
Girish SharmaUsing SQL & MODEL. Not the fastest solution, but calculates the first 1000 prime numbers in 5 seconds:
CNT VARIABLE NUMBER
EXEC: cnt: = 1000;
First SELECT
OF the double
CONNECT BY LEVEL<>
MODEL
DIMENSION)
level i
)
MEASURES)
level begins,
probe 0,
is_prime 0,.
2 prime_cnt
)
RULES ITERATE (1e9) UNTIL(prime_cnt[1] >=:cnt))
(
the probe [any] = 2 * iteration_number + 3,
is_prime [1] = box
When min (mod (probe, award-winning)) [I have between 2 and probe [1] / 2] = 0
then 0
1 other
end,
prime_cnt [1] = prime_cnt [1] + is_prime [1].
probe [1] = box
When is_prime [1] = 0
then 1
probe on the other [1]
end,
first [probe [1]] = probe [1]
)
/
FIRST
----------
1
2
3
5
7
11
13
17
19
23
29FIRST
----------
31
37
41
43
47
53
59
61
67
71
73FIRST
----------
79
83
89
97
101
103
107
109
113
127
131FIRST
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137
139
149
151
157
163
167
173
179
181
191FIRST
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193
197
199
211
223
227
229
233
239
241
251FIRST
----------
257
263
269
271
277
281
283
293
307
311
313FIRST
----------
317
331
337
347
349
353
359
367
373
379
383FIRST
----------
389
397
401
409
419
421
431
433
439
443
449FIRST
----------
457
461
463
467
479
487
491
499
503
509
521FIRST
----------
523
541
547
557
563
569
571
577
587
593
599FIRST
----------
601
607
613
617
619
631
641
643
647
653
659FIRST
----------
661
673
677
683
691
701
709
719
727
733
739FIRST
----------
743
751
757
761
769
773
787
797
809
811
821FIRST
----------
823
827
829
839
853
857
859
863
877
881
883FIRST
----------
887
907
911
919
929
937
941
947
953
967
971FIRST
----------
977
983
991
997
1009
1013
1019
1021
1031
1033
1039FIRST
----------
1049
1051
1061
1063
1069
1087
1091
1093
1097
1103
1109FIRST
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1117
1123
1129
1151
1153
1163
1171
1181
1187
1193
1201FIRST
----------
1213
1217
1223
1229
1231
1237
1249
1259
1277
1279
1283FIRST
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1289
1291
1297
1301
1303
1307
1319
1321
1327
1361
1367FIRST
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1373
1381
1399
1409
1423
1427
1429
1433
1439
1447
1451FIRST
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1453
1459
1471
1481
1483
1487
1489
1493
1499
1511
1523FIRST
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1531
1543
1549
1553
1559
1567
1571
1579
1583
1597
1601FIRST
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1607
1609
1613
1619
1621
1627
1637
1657
1663
1667
1669FIRST
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1693
1697
1699
1709
1721
1723
1733
1741
1747
1753
1759FIRST
----------
1777
1783
1787
1789
1801
1811
1823
1831
1847
1861
1867FIRST
----------
1871
1873
1877
1879
1889
1901
1907
1913
1931
1933
1949FIRST
----------
1951
1973
1979
1987
1993
1997
1999
2003
2011
2017
2027FIRST
----------
2029
2039
2053
2063
2069
2081
2083
2087
2089
2099
2111FIRST
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2113
2129
2131
2137
2141
2143
2153
2161
2179
2203
2207FIRST
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2213
2221
2237
2239
2243
2251
2267
2269
2273
2281
2287FIRST
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2293
2297
2309
2311
2333
2339
2341
2347
2351
2357
2371FIRST
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2377
2381
2383
2389
2393
2399
2411
2417
2423
2437
2441FIRST
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2447
2459
2467
2473
2477
2503
2521
2531
2539
2543
2549FIRST
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2551
2557
2579
2591
2593
2609
2617
2621
2633
2647
2657FIRST
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2659
2663
2671
2677
2683
2687
2689
2693
2699
2707
2711FIRST
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2713
2719
2729
2731
2741
2749
2753
2767
2777
2789
2791FIRST
----------
2797
2801
2803
2819
2833
2837
2843
No. 2851
2857
2861
2879FIRST
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2887
2897
2903
2909
2917
2927
2939
2953
2957
2963
2969FIRST
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2971
2999
3001
3011
3019
3023
3037
3041
3049
3061
3067FIRST
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3079
3083
3089
3109
3119
3121
3137
3163
3167
3169
3181FIRST
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3187
3191
3203
3209
3217
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3229
3251
3253
3257
3259FIRST
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3271
3299
3301
3307
3313
3319
3323
3329
3331
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3359
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3457FIRST
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3461
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3539
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3613FIRST
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3617
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79071000 selected lines.
Elapsed time: 00:00:05.07
SQL >SY.
-
Version
My querySQL> select * 2 from v$version; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi PL/SQL Release 10.2.0.4.0 - Production CORE 10.2.0.4.0 Production TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Productio NLSRTL Version 10.2.0.4.0 - Production
Desired output:with tmp AS ( select 1 as num, 'karthik' as txt from dual UNION select 2 as num, 'john' as txt from dual UNION select 3 as num, '' as txt from dual UNION select 4 as num, '' as txt from dual UNION select 14 as num, 'tom' as txt from dual UNION select 15 as num, '' as txt from dual UNION select 26 as num, 'sam' as txt from dual UNION select 27 as num, '' as txt from dual UNION select 28 as num, '' as txt from dual ) select * from ( select num,txt,rw,'G'||dense_rank() over(order by (num-rw)) grp_id from ( select num, txt,row_number() over(order by num) rw from tmp ) ) model partition by(grp_id) dimension by(num) measures(txt,cast(null as varchar2(4000)) as last_row_col) rules (last_row_col[(num)] = max(txt)[num < cv()]) GRP_ID NUM TXT LAST_ROW_COL ----------------------------------------- ---------- ------- -------------------------------------------------------------------------------- G1 1 karthik G1 2 john karthik G1 3 karthik G1 4 karthik G3 26 sam G3 27 sam G3 28 sam G2 14 tom G2 15 tom
i.e.within Group (GRP_ID) the LAST_ROW_COL column must have the most recent (order by num desc) not null not the value that is displayed in the last line of this group in particular.GRP_ID NUM TXT LAST_ROW_COL G1 1 karthik karthik G1 2 john G1 3 G1 4 john G3 26 sam G3 27 G3 28 sam G2 14 tom G2 15 tom
So, it should be 'john' for the rest of the null values in the group G1 (Kiss will remain as for num = 1) which should appear on the final line of this group in particular.
Thanks in advance.
Published by: RUSSO on January 2, 2012 04:18RUSSO says:
I thought that this could be done easily using the power of the sql model clause
with tmp AS ( select 1 as num, 'karthik' as txt from dual UNION ALL select 2 as num, 'john' as txt from dual UNION ALL select 3 as num, '' as txt from dual UNION ALL select 4 as num, '' as txt from dual UNION ALL select 14 as num, 'tom' as txt from dual UNION ALL select 15 as num, '' as txt from dual UNION ALL select 26 as num, 'sam' as txt from dual UNION ALL select 27 as num, '' as txt from dual UNION ALL select 28 as num, '' as txt from dual ) select grp_id, num, txt, last_row_col from tmp model dimension by(row_number() over(order by num) rw) measures(num,txt,txt last_row_col,cast(null as varchar2(5)) grp_id) rules( grp_id[any] = 'G' || dense_rank() over(order by num[cv()] - cv(rw)), last_row_col[rw > 1] order by rw = case when last_row_col[cv()] is null then last_row_col[cv() - 1] else last_row_col[cv()] end, last_row_col[rw > 1] order by rw = case last_row_col[cv() + 1] when last_row_col[cv()] then null else last_row_col[cv()] end ) / GRP_I NUM TXT LAST_RO ----- ---------- ------- ------- G1 1 karthik karthik G1 2 john G1 3 G1 4 john G2 14 tom G2 15 tom G3 26 sam G3 27 G3 28 sam 9 rows selected. SQL>SY.
Published by: Solomon Yakobson January 2, 2012 09:35
-
SQL statements consume several times
Hi all
Recently I have faced the issue, 10 processes are taking place (means 10 sql statements) 4 declarations are huge time. For timebieng, I killed all sessions, but I know that's not just solve the problem. Can someone please explain briefly how to analyze the issue, root cause conclusion and giving if possible solutions for example please...
What are the parameter that should be considered for the solution.
Concerning
KRISHNAHello Krishna,
The steps you need to take are explained in this thread:
How to post a SQL tuning application HOW TO: post a request for tuning SQL - model poster statementIn short:
review the query plans, or ideally: trace/tkprof processes.
After the output here, as well as your database version and optimizer parameter values. -
Hi all
My env is: oracle 10 g 2 on RHEL4.0, Dell power edge 7 series.
My Q? is
is - the AWR report useful to see why the slow query exec?
Initially this setting must be considered for adjustment for a particular query.
Kind regards
KKMany things come into play with regard to tuning.
Initially this setting must be considered for adjustment for a particular query.
I always start with the execution plan.
These discussions could help you understand about what you can do:
When your query takes too long: when your query takes too long...
How to post a SQL tuning request: HOW TO: post a request for tuning SQL - model poster statementIn addition, you need to explore the
Oracle® Database Performance Tuning Guide: http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/toc.htm
and do some research on this forum and http://asktom.oracle.com should give you more ideas. -
Hi,
I believe that this sql can be improved, but honestly i don't know how.
--------
Select * From Ctb_Mov m Where m.CodEmp = 1 and m.Plano='G' and
Cg Between '211' and '211'
and cx between '1' and '9999999'
and (M.GRUPO is NULL or
M.GRUPO in (select m1.GRUPO
from ctb_mov M1
where M1.CODEMP = m.codemp and
M1.PLANO = m.plano and
M1.cg = M.cg and
M1.cx = M.cx and
M1.GRUPO = M.GRUPO and
M1.datamov <= to_date('17092009','ddmmyyyy') and
M1.GRUPO <> 9999999
group by M1.CODEMP, M1.PLANO, M1.cg,
M1.CX, M1.GRUPO
having sum(M1.VLD - M1.VLC) <> 0))
-------
Suggestions?
Regards
Jomar[HOW: publish an application for tuning SQL - model showing statement | http://forums.oracle.com/forums/thread.jspa?threadID=863295&tstart=0]
This thread will give you a good overview on how to ask questions in this forum of the performance. After that you will get good answers!
-
Hello
The goal for the following statement is so that it can be created as a point of view, but it takes 45 minutes minimum to complete. He returned about 200 000 lines and will gradually increase approximately 1,000 lines a day. Please bear with me, I couldn't get the output autotrace and dbms_xplan.display_cursor, because it takes ages to run. I've included output from v$ sql sql instead, hope this helps.
Database version: 10.2.0.1
Here are the coded sql statement:
Here is the output of the explain plan:select tbl_4.col1, tbl_1.col2, tbl_1.col3, tbl_1.col4, tbl_5.col5, tbl_1.col6, tbl_1.col7, tbl_2.col8, tbl_2.col9, tbl_2.col10, tbl_2.col11, tbl_2.col12, tbl_3.col13, substr(tbl_6.col14, 1, 2), substr(tbl_6.col14, 4, 10), a.number_of_sales, decode (tbl_1.year, 99, 1999, 00, 2000, 98,1998), NVL2(tbl_7.col16, 'Yes', 'None'), NVL2(tbl_8.col17, tbl_8.col1, 'N/A'), NVL2(tbl_8.col18, tbl_8.col1, 'N'), NVL2(tbl_8.col19, tbl_8.col1, 'N'), NVL2(tbl_8.col20, tbl_8.col1, 'N'), tbl_6.col21 from tbl_1 join tbl_2 on (tbl_2.guid = tbl_1.guid) join tbl_3 on (tbl_3.guid = tbl_1.guid) join tbl_5 on (tbl_5.guid = tbl_1.guid) join tbl_6 on (tbl_6.guid = tbl_1.guid) join (select prod, number_of_sales from tbl_1 where prod IN (select guid from tbl_6) MODEL PARTITION BY (country) DIMENSION BY (prod, year) MEASURES (prod as number_of_sales) IGNORE NAV UNIQUE DIMENSION RULES UPDATE SEQUENTIAL ORDER ( number_of_sales[ANY, ANY] = CASE WHEN count(number_of_sales)[ANY, '1999'] > 0 THEN count(number_of_sales)[ANY, '1999'] ELSE (CASE WHEN count(number_of_sales)[ANY, '2000'] > 0 THEN count(number_of_sales)[ANY, '2000'] ELSE (CASE WHEN count(number_of_sales)[ANY, '1998'] > 0 THEN count(number_of_sales)[ANY, '1998'] ELSE 0 END) END) END ));a on (a.prod = tbl_1.prod) left outer join tbl_7 on (tbl_7.guid = tbl_1.guid) left outer join tbl_8 on (tbl_8.guid = tbl_1.guid) left outer join tbl_4 on (tbl_4.col22 = tbl_1.col23);
Here is the optimizer settings:PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- Plan hash value: 2231252653 --------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time | --------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 60357 | 29M| | 25428 (2)| 00:05:06 | |* 1 | HASH JOIN RIGHT OUTER | | 60357 | 29M| | 25428 (2)| 00:05:06 | | 2 | TABLE ACCESS FULL | TBL_8 | 727 | 53798 | | 6 (0)| 00:00:01 | |* 3 | HASH JOIN RIGHT OUTER | | 60357 | 25M| | 25420 (2)| 00:05:06 | | 4 | TABLE ACCESS FULL | TBL_4 | 102 | 7854 | | 3 (0)| 00:00:01 | |* 5 | HASH JOIN | | 60357 | 20M| 17M| 25415 (2)| 00:05:05 | PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- |* 6 | HASH JOIN | | 60742 | 16M| 15M| 21282 (2)| 00:04:16 | |* 7 | HASH JOIN | | 63196 | 15M| 14M| 19152 (2)| 00:03:50 | |* 8 | HASH JOIN | | 66797 | 13M| 5696K| 16578 (2)| 00:03:19 | | 9 | VIEW | | 176K| 3619K| | 6779 (2)| 00:01:22 | | 10 | BUFFER SORT | | 176K| 15M| | | | | 11 | SQL MODEL ORDERED | | 176K| 15M| | | | |* 12 | HASH JOIN | | 176K| 15M| 6152K| 6779 (2)| 00:01:22 | | 13 | INDEX FAST FULL SCAN| TBL_6_PK | 128K| 4643K| | 214 (2)| 00:00:03 | | 14 | TABLE ACCESS FULL | TBL_1 | 466K| 25M| | 4701 (2)| 00:00:57 | |* 15 | HASH JOIN RIGHT OUTER | | 176K| 32M| | 7814 (2)| 00:01:34 | | 16 | TABLE ACCESS FULL | TBL_7 | 467 | 19614 | | 3 (0)| 00:00:01 | PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- |* 17 | HASH JOIN | | 176K| 25M| 7536K| 7808 (2)| 00:01:34 | | 18 | TABLE ACCESS FULL | TBL_6 | 128K| 6023K| | 225 (3)| 00:00:03 | | 19 | TABLE ACCESS FULL | TBL_1 | 466K| 44M| | 4701 (2)| 00:00:57 | | 20 | TABLE ACCESS FULL | TBL_3 | 321K| 12M| | 1059 (3)| 00:00:13 | | 21 | TABLE ACCESS FULL | TBL_5 | 326K| 12M| | 523 (3)| 00:00:07 | | 22 | TABLE ACCESS FULL | TBL_2 | 337K| 22M| | 1919 (3)| 00:00:24 | --------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- 1 - access("TBL_8"."GUID"(+)="TBL_1"."GUID") 3 - access("TBL_4"."COL22"(+)="TBL_1"."COL23") 5 - access("TBL_2"."GUID"="TBL_1"."GUID") 6 - access("TBL_5"."GUID"="TBL_1"."GUID") 7 - access("TBL_3"."GUID"="TBL_1"."GUID") 8 - access("A"."PROD"="TBL_1"."PROD") 12 - access("GUID"="GUID") 15 - access("TBL_7"."GUID"(+)="TBL_1"."GUID") 17 - access("TBL_6"."GUID"="TBL_1"."GUID")
Here is the TKProf output:NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ optimizer_dynamic_sampling integer 2 optimizer_features_enable string 10.2.0.1 optimizer_index_caching integer 0 optimizer_index_cost_adj integer 100 optimizer_mode string ALL_ROWS optimizer_secure_view_merging boolean TRUE db_file_multiblock_read_count integer 16 db_block_size integer 8192 cursor_sharing string EXACT SNAME PNAME PVAL1 PVAL2 -------------------- -------------------- ---------- -------------------- SYSSTATS_INFO STATUS COMPLETED SYSSTATS_INFO DSTART 08-30-2005 15:04 SYSSTATS_INFO DSTOP 08-30-2005 15:04 SYSSTATS_INFO FLAGS 1 SYSSTATS_MAIN CPUSPEEDNW 484.974958 SYSSTATS_MAIN IOSEEKTIM 10 SYSSTATS_MAIN IOTFRSPEED 4096 SYSSTATS_MAIN SREADTIM SYSSTATS_MAIN MREADTIM SYSSTATS_MAIN CPUSPEED SYSSTATS_MAIN MBRC SNAME PNAME PVAL1 PVAL2 -------------------- -------------------- ---------- -------------------- SYSSTATS_MAIN MAXTHR SYSSTATS_MAIN SLAVETHR
Here is the output from v$ sqlcall count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.48 0.52 10 48 192 0 Execute 1 0.00 0.00 0 0 0 0 Fetch 4112 87.79 1099.84 3890789 61207 2 205504 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 4114 88.28 1100.36 3890799 61255 194 205504 Misses in library cache during parse: 1 Optimizer mode: ALL_ROWS Parsing user id: 72 Rows Row Source Operation ------- --------------------------------------------------- 205504 HASH JOIN RIGHT OUTER (cr=61207 pr=3890789 pw=3336846 time=1099316224 us) 731 TABLE ACCESS FULL TBL_8 (cr=23 pr=11 pw=0 time=11508 us) 205504 HASH JOIN RIGHT OUTER (cr=61184 pr=3890778 pw=3336846 time=1098446711 us) 102 TABLE ACCESS FULL TBL_4 (cr=7 pr=6 pw=0 time=10685 us) 205504 HASH JOIN (cr=61177 pr=3890772 pw=3336846 time=1097406100 us) 205504 HASH JOIN (cr=52309 pr=3876731 pw=3331582 time=1092251311 us) 205504 HASH JOIN (cr=49818 pr=3872092 pw=3327095 time=1088296724 us) 205504 HASH JOIN (cr=44805 pr=3862788 pw=3322741 time=1083430636 us) 205504 VIEW (cr=22340 pr=3824447 pw=3312710 time=1064542304 us) 205504 BUFFER SORT (cr=22340 pr=3824447 pw=3312710 time=1064131291 us) 205504 SQL MODEL ORDERED (cr=22340 pr=3823920 pw=3312183 time=79100422 us) 205504 HASH JOIN (cr=22340 pr=24845 pw=3829 time=22189967 us) 135074 INDEX FAST FULL SCAN TBL_6_PK (cr=1011 pr=869 pw=0 time=955438 us)(object id 103575) 469544 TABLE ACCESS FULL TBL_1 (cr=21329 pr=17067 pw=0 time=12229819 us) 205504 HASH JOIN RIGHT OUTER (cr=22465 pr=34519 pw=6209 time=18445327 us) 497 TABLE ACCESS FULL TBL_7 (cr=7 pr=3 pw=0 time=15547 us) 205504 HASH JOIN (cr=22458 pr=34516 pw=6209 time=17560031 us) 135074 TABLE ACCESS FULL TBL_6 (cr=1082 pr=1059 pw=0 time=157502 us) 469544 TABLE ACCESS FULL TBL_1 (cr=21376 pr=16734 pw=0 time=11749176 us) 341927 TABLE ACCESS FULL TBL_3 (cr=5013 pr=4950 pw=0 time=2080124 us) 341935 TABLE ACCESS FULL TBL_5 (cr=2491 pr=152 pw=0 time=5129098 us) 341932 TABLE ACCESS FULL TBL_2 (cr=8868 pr=8777 pw=0 time=3436425 us)SQL_TEXT select tbl_4… SQL_FULLTEXT SQL_ID bh7z3jzt6vw06 SHARABLE_MEM 66824 PERSISTENT_MEM 25756 RUNTIME_MEM 23808 SORTS 1 LOADED_VERSIONS 1 OPEN_VERSIONS 1 USERS_OPENING 1 FETCHES 1 EXECUTIONS 1 PX_SERVERS_EXECUTIONS 0 END_OF_FETCH_COUNT 0 USERS_EXECUTING 1 LOADS 1 FIRST_LOAD_TIME 2009-08-14/15:59:08 INVALIDATIONS 0 PARSE_CALLS 1 DISK_READS 3905090 DIRECT_WRITES 3340053 BUFFER_GETS 62290 APPLICATION_WAIT_TIME 0 CONCURRENCY_WAIT_TIME 0 CLUSTER_WAIT_TIME 0 USER_IO_WAIT_TIME 1042926858 PLSQL_EXEC_TIME 0 JAVA_EXEC_TIME 0 ROWS_PROCESSED 50 COMMAND_TYPE 3 OPTIMIZER_MODE ALL_ROWS OPTIMIZER_COST 25428 OPTIMIZER_ENV E289FB....... OPTIMIZER_ENV_HASH_VALUE 1151412318 PARSING_USER_ID 72 PARSING_SCHEMA_ID 72 PARSING_SCHEMA_NAME DATA KEPT_VERSIONS 0 ADDRESS 569F083C TYPE_CHK_HEAP 00 HASH_VALUE 4067291142 OLD_HASH_VALUE 1777942244 PLAN_HASH_VALUE 2231252653 CHILD_NUMBER 0 SERVICE SYS$USERS SERVICE_HASH 0 MODULE SQL Developer MODULE_HASH 0 ACTION ACTION_HASH 0 SERIALIZABLE_ABORTS 0 OUTLINE_CATEGORY CPU_TIME 81093819 ELAPSED_TIME 1122285962 OUTLINE_SID CHILD_ADDRESS 52541620 SQLTYPE 6 REMOTE N OBJECT_STATUS VALID LITERAL_HASH_VALUE 0 LAST_LOAD_TIME 2009-08-14/15:59:08 IS_OBSOLETE N CHILD_LATCH 3 SQL_PROFILE PROGRAM_ID 101200 PROGRAM_LINE# 2 EXACT_MATCHING_SIGNATURE 4.3484E+18 FORCE_MATCHING_SIGNATURE 1.5863E+19 LAST_ACTIVE_TIME 14-AUG-09 BIND_DATAThere is a large gap between the time cpu and elapsed time. So a lot of time - more than 1000 seconds of 1100 seconds in total - were spent waiting. Please repeat track/tkprof step you took, but this time include the record of the expectations. You can do, for example, by launching:
alter session set events '10046 trace name context forever, level 8'I think for now, is that your PGA is undersized for this query, because the time is especially dedicated to step "BUFFER FATE." If the report of tkprof including wait, reveals a lot of 'direct path read temp' and 'direct path write temp', then we know for sure.
Kind regards
Rob. -
How to add constraints not null
Data modeling Version 4.1.1.888 SQL
How to add constraints not null in sql modeling data and rename the default constraint name that is getting generated when marking column as required.
You can edit the template for the names of constraint not Null under properties-> setting->-> models naming standards. Change one marked 'not forced Null. Then, under preferences-> Data Modeler-> DDL, you must uncheck "generate short form constraint NOT NULL".
-
problem with a loop in a cursor
Hello
I wrote following PL/SQL procedure to create indexes on a table to particular warehouse. WAR_ETL_INDEX table is a table of store, I created that contains the table name, column name, and the name of the index of this column. I pick up all these details in the WAR_ETL_INDEX table and create indexes using the following procedure. Now, after compiling the code, when I am trying to execute the following procedure with
"set serveroutput on .
EXEC RECREATE_INDEX("W_General_D"); "it seems that it is not picking all the files lets assume if the cursor has 3 records this code tries to run create 3 index but all three times its operation for the first record." Thus, its closure for 3 times, but for all his race for the first record only loop. Could you please review the code and share if you find any problem.
CREATE or REPLACE PROCEDURE RECREATE_INDEX (par_table_name VARCHAR2)
IS
INDEX_NAME WAR_ETL_INDEX. INDEX_NAME % TYPE;
WAR_ETL_INDEX OF COLUMN_NAME. COLUMN_NAME % TYPE;
l_sql DEFAULT CLOB "TABLESPACE in CREATE BITMAP INDEX INDEX_NAME ON TABLE_NAME ('COLUMN_NAME') 'P1_DW_IDX" ";
CURSOR C1 IS
SELECT INDEX_NAME, COLUMN_NAME
WAR_ETL_INDEX WHERE TABLE_NAME FROM = par_table_name;
BEGIN
OPEN C1;
LOOP
FETCH C1 INTO INDEX_NAME, COLUMN_NAME;
WHEN EXIT C1% NOTFOUND;
l_sql: = REPLACE (REPLACE (REPLACE(l_sql,'INDEX_NAME',INDEX_NAME), 'TABLE_NAME', par_table_name), 'COLUMN_NAME', COLUMN_NAME);
dbms_output.put_line (l_sql);
EXECUTE immediate l_sql;
END LOOP;
commit;
CLOSE C1;
END RECREATE_INDEX;
You need to reset your variable l_sql with the SQL model on each loop. You have no need for a commit, DDL has an implicit validation thus creating an index will do. Try something like this...
CREATE or replace PROCEDURE Recreate_index (par_table_name VARCHAR2) IS
l_sql CLOB.
CLOB constant l_templatesql: = "TABLESPACE in CREATE BITMAP INDEX INDEX_NAME ON TABLE_NAME ('COLUMN_NAME') 'P1_DW_IDX" ";
BEGIN
FOR rec in (SELECT index_name,
column_name
OF war_etl_index
WHERE table_name = par_table_name)
LOOP
l_sql: = l_templatesql; -Reset DDL index
l_sql: = Replace (replace (Replace (l_sql, 'INDEX_NAME', rec.index_name))
(('TABLE_NAME', par_table_name), 'COLUMN_NAME', rec.column_name);
dbms_output. Put_line (l_sql);
EXECUTE IMMEDIATE l_sql;
END LOOP;
END recreate_index;
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Y at - it a keyboard shortcut to insert snippets?
Is it possible to insert a snippet without resorting to code snippets panel? Something like completion for extracts Insight would be much more useful.
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