REF Partitioning Is Affecting On Complex Queries
Apr 30, 2013
I am having 7 tables consider A,B,C,D,E,F,G. whereas A is master table and others are dependent on table A. columnA is referential key for all tables. Table A is having one DateRange column.I have successfully created range partitioning with partitioning key is DateRange. and Refeernce partitioning on other tables with column referring to ColumnA with foreign key. Also created local indexes on partitioned key DateRange.
Problem is that, while fetching complex queries for reports, it is taking more time as compared to non partitioning structure. Is ref partitioning affecting on complex queries, queries returning more rows?
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Jan 23, 2007
our system has always been running on mysql database and recently we have switched to oracle. As the current system is coded using mysql query syntax, when i run this program using oracle database, i got a error. The language that I'm using is JSP.
this is the error message:
The following query could not run on oracle. To convert these mysql queries to oracle compatible queries.
SELECT productID,productName FROM products order by productName;
select newsID,newsDate,newsHeadLine1 from news order by newsDate Desc limit 3
SELECT fuji_products.productID, productName_Display FROM products,products_availability where products_availability.productID=products.productID and (product_status='enabled' or product_status='all') AND category='12'
SELECT catID, catSub1 from category where catSub = '"+ prodCat +"' AND catSub1 is not null group by catSub1 order by catSub1
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Apr 4, 2013
I have problem to transfer data in non partitioning table to partitioning table.
I have non partitioning table and i create new table partitioning that have same column and type like in non partitioning. So how can i transfer data from table in non partitioning to table in partitioning?
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Jun 12, 2012
primary key constraint on transaction_dtl_bk is affecting the insertion of next correct rows.
CREATE OR REPLACE PROCEDURE NP_DB.san_po_nt_wnpg_1 (
dt DATE
)
IS
v_sql_error VARCHAR2 (100); -- added by sanjiv
v_sqlcode VARCHAR2 (100); ---- added by sanjiv added by sanjiv
[code]...
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Sep 29, 2012
My database version
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - ProductionOS version:
Windows 7 64bit I have schema(scott) export with schema level option and imported with different name as (scott1).At regular period of time i need to import the scott to scott1 without affecting existing records.such as
*1. Need to append new created records.*
*2. Need to append updated records.*
for the above requirement I did in the following way
expdp xxxx/******** schemas=SCOTT directory=dumpdir dumpfile=SCOTT_28-SEP-2012.dmp logfile=exp_SCOTT_28-SEP-2012.log imported in the following way impdp xxxx/******** AS SYSDBA REMAP_SCHEMA=SCOTT:SCOTT1 directory=DUMPDIR dumpfile=SCOTT_28-SEP-2012.dmp logfile=imp_SCOTT2_28-09-2012.log TRANSFORM=SEGMENT_ATTRIBUTES:n TABLE_EXISTS_ACTION=APPEND.
The problem is i couldn'table to append the records to existing tables the log error show such ways.
ORA-31684: Object type USER:"SCOTT1" already exists
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
[code].....
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Apr 27, 2010
I have a table "TSKIDENT" with below structure:
CREATE TABLE TSKIDENT
(
TSKID CHAR(11 BYTE) NOT NULL,
NBRSEQ INTEGER,
IDCODE INTEGER,
FIELDNBR INTEGER,
FIELDVALUE CHAR(50 BYTE) NOT NULL
[code]....
For each TSKID/IDCODE combination there are 4 FIELDNBRS with some values. For each set of 4, there is one NBRSEQ which can change depending on the order in which the a set of same TSKID/IDCODE is entered in the table. For 1st set of 4 for a given taskid, it will be 1. For second set for same Taskid it will be 2 and so on. But if the second set has a different taskid then the number starts from 1 for the new TASKID.
Now I want to Find all the tasks which has same FIELDVALUE for a complete SET of 4. Lets say I want to find a task which meets following criteria:
IDCODE = 97
FLDNBR = 1
FIELDVALUE = 1
IDCODE = 97
FLDNBR = 2
[code]....
I want to know if the query can be restructured to a less complex than this and fetch the same results. In our example it should fetch taskid = T222222222.
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Mar 25, 2011
I have the following questions you can create a bulk collect in which he has 3 fields and one of them is a type collect failing index or other bulk collect?.If so, how would the procedure for when to insert the first record sub fill the bulk collect. being for example something like this:
-----------------------------------------------------------------
index | codigo | nombre | telefono
| | |-----------------------
| index | telefono
-----------------------------------------------------------------
| | | |
[code]...
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Sep 27, 2013
I have folliwng table
CREATE TABLE abcd
(
trans_type VARCHAR2(10) nn,
original_tran_no NUMBER,
original_line_item NUMBER(20),
original_trans_dt DATE);
I have to create a constraint when trans_type = 'R'then (original_tran_no and original_trans_dt ) should be not null else can be null able; is the follwing stmt right?
alter table abcd add constraint t1_chk1
check (
( case when trans_type = 'R' then (original_tran_no is not null
and original_trans_dt is not null))
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Feb 1, 2011
I need to develop a complex report , i have information in following table.vehicle with two fields number date_of_renewal date
what i need is to generate a calendar that will show all the vehicles that due for renewal based on the date.On the top it will be years , next is months for that year and below vehicles which needs renewal
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Feb 6, 2013
I use a sequence to generate an alphanumeric code and I need to update all rows of a table with that sequence. The sequence is created with this code:
SELECT (CHR(TRUNC(s.nextval/1000) + ASCII('A')) || LTRIM(TO_CHAR(MOD(s.currval,1000),'099'))
FROM dual;
I have tried many things - most recently
Update t3_temp_table
SET mergecode =
SELECT (CHR(TRUNC(s.nextval/1000) + ASCII('A')) || LTRIM(TO_CHAR(MOD(s.currval,1000),'099'))
FROM dual;
I get missing expression error.
It works fine if I use a straight s.nextval
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Jul 31, 2012
There is XMLType table with structural storage. Is there a way to make schema validation disabled on some elements of complex type?
It is unpractical to maintain a schema for the element due to high volatility. Ideally it will be stored in CLOB and extracted as is a whole branch without validation, none of the elements under this complex type will be extracted separately.
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Apr 5, 2013
How Can I delete the returned two rows?
1 select s.reg_no,s.course_code,
2 s.section src_sec,a.section a_sec,a.att_date,a.att_flag
3 from attendance a ,src s
4 where a.semester_code=1
5 and a.semester_year=2013
6 and s.semester_code=1
[code]....
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Sep 26, 2013
create materialized view ino_crm.MV_IDENTIFICATION_DETAILS REFRESH FAST as SELECT billing_account_id, i.s1 KEYS_ , COALESCE(i.s2, i.b, i.d) VALUES_ FROM ba_personal_details pd , xmltable ( '//entry[string = "identification Details"]//entry' passing xmltype(pd.details) columns s1 VARCHAR2 (255) path 'string[1]' ,s2 VARCHAR2(255) path 'string[2]' ,b VARCHAR2(255) path 'boolean' ,d VARCHAR2(255) path 'date' ) i WHERE pd.mandator_key = 'VSO01' AND pd.valid_to = to_date('01.01.4000', 'DD.MM.YYYY'); and
I get an exception like: SQL Error: ORA-12015: cannot create a fast refresh materialized view from a complex query 12015. 00000 - "cannot create a fast refresh materialized view from a complex query"
*Cause: Neither ROWIDs and nor primary key constraints are supported for complex queries.
*Action: Reissue the command with the REFRESH FORCE or REFRESH COMPLETE option or create a simple materialized view.
I have found this URL....
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May 19, 2011
I have a case expression as follows:
(CASE WHEN DATEa=DATEb THEN 0
WHEN DATEa> DATEb THEN NETWORKDAYS(DATEb, DATEa)
WHEN DATEa < DATEb THEN NETWORKDAYS(DATEa, DATEb)
WHEN STATUS='PENDING' THEN NULL
ELSE NULL
END) AS RESULTa,
Now what I need to be able to do is place those results in buckets, similar to this:
(CASE WHEN RESULTa < 0 THEN '<0'
WHEN RESULTa between -1 AND 6 THEN '<=5'
WHEN RESULTa >5 THEN '>5'
ELSE ''
END) AS BUCKETa
I understand that I can't call an alias from a previous case expresson to get these desired results and how I could combine the two statements to get the desired bucket.
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May 22, 2010
The data in one of the temporary table has been compiled as below. Number of Days elapsed between two transaction dates is required to be computed and multiplied with the balance. There can be multiple number of same transaction dates. When previous date and the current transaction dates are same the resulting number of day difference should be 0. But when they are different the difference between them is to be computed. On the last day of the Financial Year i.e. '31/03' of any year the difference day should be shown as 1 so as to make 365 or 366 days in a year. Simply deducting d1 from d2 on 31st will not be suffice as the difference is one day less.
----------------------------------------------------------------------------------------- -------
Transaction Narration DebitCreditBalanceNo of DaysProduct
DateDifference
----------------------------------------------------------------------------------------- --------
01/04/2009Opening Balance 45020450277346654
17/06/2009ByAmt5044521253424
29/06/2009By Amt1004352156678912
02/12/2009By Amt424310119476000
[code]....
improve the above code and get the desired output result.
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Oct 20, 2011
I'm trying to call a Java function from within a PL/SQL aggregation function with a (array of) complex data type.
a) basic definitions (work and are ok)
CREATE OR REPLACE TYPE eventtype AS OBJECT
(
relevance NUMBER,
bid1 NUMBER,tid1 NUMBER,prob1 NUMBER,
bid2 NUMBER,tid2 NUMBER,prob2 NUMBER,
bid3 NUMBER,tid3 NUMBER,prob3 NUMBER,
bid4 NUMBER,tid4 NUMBER,prob4 NUMBER,
bid5 NUMBER,tid5 NUMBER,prob5 NUMBER,
bid6 NUMBER,tid6 NUMBER,prob6 NUMBER
);
CREATE OR REPLACE TYPE eventtuple IS TABLE OF eventtype;
/
b) The following call works (but is not exactly that what I want):
public class pcompDP {
public static NUMBER probComputation(oracle.sql.STRUCT pin) throws java.sql.SQLException {
...
}
}
create or replace FUNCTION pcompDPFunc(cin IN eventtype) RETURN NUMBER PARALLEL_ENABLE DETERMINISTIC AS LANGUAGE JAVA NAME 'pcompDP.probComputation(oracle.sql.STRUCT) return BigDecimal';
/
SELECT pcompDPFunc(eventtype(5, 6, 0.3, 10, 20, 0.45, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)) from dual;
c) The following call doesn't work (but should have the intended semantics):
public class pcompDP {
public static NUMBER probComputation(oracle.sql.STRUCT[] pin) throws java.sql.SQLException {
...
}
}
create or replace FUNCTION pcompDPFunc(cin IN eventtype) RETURN NUMBER PARALLEL_ENABLE DETERMINISTIC AS LANGUAGE JAVA NAME 'pcompDP.probComputation(oracle.sql.STRUCT[]) return BigDecimal';
/
SELECT pcompDPFunc(eventtuple(eventtype(2, 3, 0.234, 1, 1, 0.123, 0, 0, 0, 0, 0, 0, 0, 0, 0), eventtype(5, 6, 0.3, 10, 20, 0.45, 0, 0, 0, 0, 0, 0, 0, 0, 0))) from dual;
d) What's the error? Do I have to use JPublisher or is it possible without it? I guess an array should be possible without it.
The type of the parameter seems to be wrong. Question is whether in PL/SQL, Java or SQL.
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Aug 21, 2013
1)I have created a complex view, and created an instead of trigger on this view
example:
create or replace trigger tr_x instead of before update on test_view_name for each row
-------
2) I have created an update policy on this view
DBMS_RLS.ADD_POLICY (
object_schema := schema_name,
object_name := name of the view,
policy_name := ploicy name,
function_schema := func schema name,
policy_function := pkg_test.fn_get_where,
statement_types := 'UPDATE',
update_check := TRUE,
policy_type := dbms_rls.dynamic);
3) function pkg_test.fn_get_where, which is used in the policy function always return 1 = 2, so that update should fail.
4) Now I will issue an update statement on the view test_view_name
update test_view_name set test_col = 1;
but still it updates the records, though update policy returns the where cluse 1 = 2
same where clause for select policy works perfectly fine.
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Apr 27, 2011
I'm trying to create materialized view, successfully create logs for all the tables involved.
CREATE MATERIALIZED VIEW LOG ON tbJournal
WITH ROWID, SEQUENCE (tabid, companyid, storelocid, tabstatus, linetype)
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW LOG ON TBTABS
WITH ROWID, SEQUENCE (TSTAMP, COMPANYID, NUMGUESTS, POSITIONID, STORELOCID, TABSSTATUS)
INCLUDING NEW VALUES;
[code]....
The result is ora-12015: cannot create a fast refresh materialized view from a complex query
It does work fine if I remove
AND EXISTS (SELECT 1 FROM tbJournal J
WHERE j.tabstatus NOT BETWEEN -6 AND -4
AND j.linetype = 1
AND T.tabid = J.tabid
AND T.companyid = J.companyid
AND T.storelocid = J.storelocid)
from the where clause
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Sep 20, 2012
I want to practice partitioning, I have schema which has sales table but that is already partitioned. I want to know if there are some schema available for download which has non partitioned tables and records more than 10000.
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Mar 13, 2012
There is a very large fact table that is range partitioned by a column DATE_KEY of type NUMBER(38), such that every hour is a different partition. There is a bitmap index BX$FACT#DATE_KEY on field DATE_KEY, which also is a foreign key referencing DATE_DIM (DATE_KEY). There is a different DATE_KEY for every hour, generated as YYYYMMDDHH24.
When I run
"SELECT * FROM FACT WHERE DATE_KEY >= 2012031207 AND DATE_KEY < 2012031208"
to get all the records for 7 am on March 12th, partition pruning kicks in and sees that only one partition is used. The CBO then decides to do a full scan of the partition. This behavior is correct/desired.
If, however, I run
"SELECT * FROM FACT WHERE DATE_KEY = 2012031207 AND DATE_KEY < 2012031209"
to get all the records for 7 and 8 am, Oracle knows that it will have to scan two partitions. The CBO then decides that using the BX$FACT#DATE_KEY must be a good idea and, instead of doing a full scan of the partitions, does access by local index rowid, which is many times slower.
I think I understand the cause - when more than a single partition is involved, Oracle has to use the global index stats (instead of the local ones, like in the first scenario) and the CBO decides to use it because that the selectivity for the global index is great, when in fact the query will return all the rows for that particular partition (no selectivity).
How to get the CBO to choose a full scan in the second scenario as well? I need to support ad-hoc queries generated by a BI tool, so I cannot add hints to the queries. I also can't get rid of the index on DATE_KEY, because in real life the predicates are on fields of the date dimension, not directly on the key, so I need to join on it.
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Jul 27, 2012
How to partition a table which is already having data.I have a STUDENT table along with following fields which is having million of rows.
studentid name class Gender
Now I want to partition this table based on gender MALE and FEMALE.
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Sep 23, 2013
I have a partitioned table with 1 lakh records
if i disable the partition feature im my database will it affect my table data.
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Mar 4, 2013
how should i do to make horizontal partitioning?
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Jan 24, 2013
we apply partitioning concept on a table which don't have any primary key ?
I just want to add one more field as primary key with some sequence generated values while partitioning ? Is it possible ?
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Jun 2, 2010
an existing normal table be converted to a partitioned table without recreating the table or truncating/reloaded data?
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Nov 2, 2012
Oracle 10.2.0.4
I partitioned a source table of around 100 million rows (62GB) in DEV server. The target database was created new. It was range partioned on a date column as follows:
PARTITION BY RANGE (ENTRY_DATE_TIME)
(
PARTITION ppre2012 values less than (TO_DATE('01/01/2012','DD/MM/YYYY')) TABLESPACE WST_LRG_D,
PARTITION p2012 values less than (TO_DATE('01/01/2013','DD/MM/YYYY')) TABLESPACE WST_LRG_D,
PARTITION p2013 values less than (TO_DATE('01/01/2014','DD/MM/YYYY')) TABLESPACE WST_LRG_D,
PARTITION p2014 values less than (MAXVALUE) TABLESPACE WST_LRG_D
)
That is yearly basis. Anything before 2012 went to ppre2012, then p2012, p2013 and so forth. There is 20 million rows in p2012. and around 75 million rows in ppre2012. We needed both the source (un-partitioned) and target (partitioned) tables in DEv for comparision. The queries are normally on the current year partition. Just to state taht I am a developer and don't have full visibility to the production instance.
Now that our tests are complete, we would like to promote this in production. Obviously in production we would not not need both source and target tables. In all probability this will be performed over a weekend window. Therefore I would like to suggest the following .
1) use expdp to export source table
2) drop the source table
3) create a new source table "partitioned" with no indexes
4) use impdp to get data back into table
5) create global index (it is a unique index to enforce uniquness) and the rest of indexes as local
6) perform dbms_stats.gather_table_stats(user,'SOURCE', cascade=>true). This takes around 2 hours in dev
My point is that whether importing 100 million rows will not cause issues with undo segments. Can we import data say first to the current partition p2012 (20 million rows) first.
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Mar 28, 2013
If a Interval Partitioning can be created on a table for every fortnight ? db version is 11g.
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Jan 7, 2013
Interval partitioning I keep getting the below error on a table.A more discerning eye is needed
PARTITION DEC_2012 VALUES LESS THAN (TO_DATE('01-01-2013', 'DD-MM-YYYY')),
*
ERROR at line 26:
ORA-14037: partition bound of partition "DEC_2012" is too high
CREATE TABLE STATISTICS_PART
(
ID_KEY NUMBER(10) NOT NULL,
LUD DATE DEFAULT sysdate,
[code]....
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Mar 19, 2013
Explain me steps to do vertical partitioning in oracle .
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Feb 4, 2013
I have little bit confuse in data partitioning in database, I have read about it and i understand that there ate two type called vertical partitioning and another horizontal partitioning...I have three questions are
1- is data partitioning used of in networks or can be in one PC?
2- the data partitioning divided data that in table to partitions (groups) , according what ??? is to quantity or meaning of data that inside table?
3- Is clustering that can be execute by Oracle using CTX_CLS.CLUSTERING type of it or partitioning not related to it?
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