Index With Trim Function?
Jun 26, 2012
I have the below SQL with cust_id is indexed
DELETE FROM ALERT WHERE TRIM(CUST_CD)=TRIM('100350378');
Output of the plan table is
OBJECT_NAME OPTION COST
ALERT 1866
ALERT BY INDEX ROWID 1866
DELETE FROM ALERT WHERE CUST_CD=TRIM('100350378');
Output of the plan table is
OBJECT_NAME OPTION COST
ALERT 3
ALERT BY INDEX ROWID 3
how to use trim on indexed column.
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Jun 22, 2011
I have created a function based index(FBI) with trim(header_date), but when i query the table by passing the hardcoded date, it is not working and i have to manually apply trim to get the result?
my query after applying FBI is
select * from abc where header_date = '21-JUN-11', no results are returned and when i apply trim to header_date it works fine .
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Feb 22, 2011
Is there any possibilites to remove the symbol '*' only from LEFT or RIGHT side, instead BOTH the side.
select '>' || trim (both '*' from '***removing stars at both sides***') || '<' "Stars removed" from dual;
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May 9, 2013
I am calling a function in front end, from front end i am passing space, now i want to trim space in parameter itself, it's psssible, assume the below is the function defination, i want to trim the p_region_name parameter like this trim(p_region_name), is this possible?
FUNCTION add_country_region_column (
p_s_country_code_iso_2 IN varchar2_table_type,
p_type IN d_country.c1_type%TYPE,
p_name IN d_country.c1_name%TYPE,
p_desc IN d_country.c1_desc%TYPE,
[Code]....
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Jun 15, 2012
Is anyway to create function based index for group function columns.
For example
select max(timestamp),min(age),averge(sal).... ... .. from tab;
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Jun 27, 2011
I have a table which sees a lot of use for queries
CREATE TABLE CASE_STAGE
(
ID NUMBER(9) NOT NULL,
STAGE_ID NUMBER(9) NOT NULL,
CASE_PHASE_ID NUMBER(9) NOT NULL,
"CURRENT" NUMBER(1) NOT NULL,
--and other columns
)
ID is a primary key
CASE_PHASE_ID is a foreign key
"CURRENT" should only ever have values of 0 or 1. When it has a value of 1 it is unique for that CASE_PHASE_ID
What I have tried that doesn't work is
create unique index case_stage_F_IDX1 on case_stage("CURRENT", case_Phase_id) which gives me
ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
What is the correct syntax, something like ("CURRENT"=1,case_phase_id) seems right but fails with an error about a missing bracket. Do I need to use a CASE statement here?
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Apr 14, 2012
I have a requirement where the user input values will be passed as comma separated string to backend, which is queried against the table using instr. But the index present on the table is not using the index , due to the instr function.How can I create a index in such a way that The instr function uses it.
CREATE TABLE TEST_IDX
(
CCN VARCHAR2(10 CHAR),
SKU_NUM VARCHAR2(10 CHAR),
MOD VARCHAR2(10 CHAR),
SKU_STATUS VARCHAR2(2 CHAR),
RPT_FLAG VARCHAR2(2 CHAR),
CYCLE_AS_OF_DATE DATE,
SMP_IDENTIFIER NUMBER,
MEASURE_NAME VARCHAR2(100 CHAR)
);
CREATE INDEX TEST_IDX1 ON TEST_IDX
(CCN, SMP_IDENTIFIER, MOD, CYCLE_AS_OF_DATE, RPT_FLAG,
MEASURE_NAME);
The below query is going for full table scan due to this.
select * from test_idx where (INSTR (','||'E10000'||',', ',' || ccn || ',') <> 0 OR 'E10000' = 'DEFAULT')
and mod='90396' and rpt_flag='O' and smp_identifier=2
how to recreate the above index so that these queries uses this index.
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Feb 22, 2012
I have a table which has 4M records
This table has a query where one of the condition is
AND STATUS <> 'C'
Now the data is as following
select count(*) record_count, status from new_business group by status;
record_countstatus
4298025C
15N
13Q
122S
I want to know if following index would be useful in this case while the condition in where clause is
"AND STATUS <> 'C'"
create index nb_index_1 on new_business(case when status in('N','Q','S') then 1 else NULL end);
Or
create index nb_index_1 on new_business(case when status ='N' then 'N' when status='Q' then 'Q' when status='S' then 'S' else NULL end);
I tried it on a sample table but the index is simply not picked up even when hinted following are the db level settings
query_rewrite_enabled string TRUE
query_rewrite_integrity string enforced
I tried it 'query_rewrite_integrity' with 'trusted' as well .
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Apr 3, 2012
One of our query is not using function based index, the required priv is granted to the user executing the query and also tables stats are gathered? what could be the reason for the query to not to pick the FBIndx? the table is a huge one having million of records, is it that CBO thinks that not picking FB indx is the best execution plan? let me know how can we make the query use the FB indx, also there is a restriction that we cannot force it using hints.
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Jul 2, 2010
Using oracle 10g R2 on sun-solaris 10 (sparc-64) Well in the MIS system we have lot of ad-hoc queries coming up. We have proper indexing. Say an example which runs very slow;
SELECT GLKCO, GLDCT, GLDOC, GLDGJ, GLJELN, GLEXTL, GLPOST, GLICU, GLICUT, GLDICJ, GLDSYJ,
GLTICU, GLCO, GLANI, GLAM, GLAID, GLMCU, GLOBJ, GLSUB, GLSBL, GLSBLT, GLLT, GLPN, GLCTRY, GLFY, GLFQ,GLCRCD, GLCRR, GLHCRR, GLHDGJ, GLAA, GLU, GLUM, GLGLC, GLRE, GLEXA, GLEXR, GLUPMJ, GLUPMT, GLBCRC, GLCRRM, GLACR, GLAN8
FROM "PRODDTA"."F0911"
WHERE GLUPMJ <> 0
AND TO_DATE('1 JAN' || (19+substr( GLUPMJ , 1, 1)) || substr( GLUPMJ ,2,2)) + substr( GLUPMJ , 4, 3 ) -1 BETWEEN SYSDATE - 365 AND SYSDATE
[code]....
Here GLUPMJ already indexed so the second query returing an index scan but the first query does a FTS naturally.Now even if I plan to create a function based index on 'the bold highlighted' but how.
create index glupmj_idx on f0911(TO_DATE('1 JAN' || (19+substr( GLUPMJ , 1, 1)) || substr( GLUPMJ ,2,2)) + substr( GLUPMJ , 4, 3 ));..Error If I don't use a FBI my query will result in FTS.
1> how to create a FBI here in this case
2> In MIS systems where 'n' no of ad-hoc queries can come up, how to avoid FTS.
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Jun 27, 2013
It is not possible to run SHRINK SPACE against a table with a function based index. This is documented, and I've tested on the current release. I've reverse engineered it a bit, and the issue is in fact that you cannot SHRINK SPACE if there is an index on a virtual column:SQL> SQL> create table t1(c1 number, c2 as (c1*2)) segment creation immediate;
Table created.
SQL> alter table t1 enable row movement;
Table altered.
SQL> alter table t1 shrink space;
Table altered.
SQL> create index i1 on t1(c2);
Index created.
SQL> alter table t1 shrink space;
alter table t1 shrink space
ERROR at line 1: ORA-10631: SHRINK clause should not be specified for this object.
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Aug 9, 2013
I have a field "Email". The length of it is restricted to 30. But i mayget more than 30 characters. So how to trim the email address so that its max length is 30 characters.
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Aug 20, 2013
read the data and write into the textfile. I have a target text file with one column in varchar2(8000) length size. Whenever i write into this textfile, after the first row entered, for example, the first row string is 'H2001', then it will automatically spacing 7995 spaces. What I want is, when i enter the second row, it will auto write into the file in next row without all the spaces in row 1. I had been tried using trim, rpad, substr. and still don't get the thing that i want.
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Mar 11, 2010
Need to do this
Column1
--------
5648_6844_20020201
6878_6845_20051201
9845_6548_20080307
Need to change it to this
Column1
--------
20020201
20051201
20080307
So I basically need to remove the leading part of the string using the "_" underscore as the delimiter.
So I thought this would work, but no luck.
SELECT LTRIM('_', Column1) "NewCOL" From table;
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Aug 15, 2010
How to write a pl/sql query to trim/remove more than one character from string.
Like the itemfield is 'Profit CY' I want it to show as 'Profit' but only for itemfields that say 'Profit CY' in the column for remaining items in column such as 'Loss CY' should stay as it is.
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Feb 1, 2013
trim down the following sql to within 255 characters help:
select indate
from (
select case count(inputDate)
when 1 then inputdate
end as indate
from commLeaseBut5
[code]...
This sql is check a date field in the database for record which, if the date field is blank it should be a new record. Then the sql will assigned the current timestamp and stored to the new record. Otherwise, the sql will return the record timestamp for display.
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Aug 18, 2011
I am trying to compare 2 char columns using trim to avoid space padding
CREATE TABLE TRIAL_A
(ABC CHAR(6));
INSERT ALL
[Code]....
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Apr 9, 2012
My control file is :
LOAD DATA
APPEND
INTO TABLE IPGITLREDATA WHEN ITL_REC_TYPE = 'D'
FIELDS TERMINATED BY ','
TRAILING NULLCOLS
(
[code].....
The data file might have a value of " D " instead of "D" for ITL_REC_TYPE and ITL_REC_TYPE is in the WHEN clause. How can I check for the trimmed value of ITL_REC_TYPE in the WHEN clause ?
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Aug 8, 2013
Can i use a trim(col_name) to check a NULL value in a table? as IS NULL function is taking a long time.
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Sep 9, 2010
I am attempting to insert date data into a column using sqlldr...Here's the current format:
2010-03-01 00:20:19.277
So far, I haven't gotten anything to work. I would like to trim the .277 from the existing date. Here's my latest attempt:
birthdate DATE "to_date(substr(birthdate,1,19),'YYYY-MM-DD HH24:MI:SS')"
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Jul 1, 2013
A computation after submit pl/sql function process to trim off the first part of the string (CQ..) within the list manager values. Support for example the list manager contains values such as
CQ..SAMPLE1..TEST1CQ..SAMPLE2..TEST2CQ..SAMPLE1..TEST2
The computation process should trim off the first part(CQ..) and should return the list manager value as SAMPLE1..TEST1SAMPLE2..TEST2SAMPLE1..TEST2 Oracle APEX 4.0.2 is the version and Oracle 10g r2 is the database.
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Jun 27, 2012
I am on 11.2.0.3 Enterprise Edition. We are using the new feature "Composite Domain Index" for a Domain index on a very large table (>250.000.000 rows). It really works with mixed queries. We added two number columns using FILTER BY.We have lots of DML on this table. Therefore, we are executing synchronize and optimize once the week. The synch behaves pretty normal. But "optimize_index" takes a very very long time to complete. I have switsched on 'logging' for the optimize process. The $I table takes some time but is finished normally. But the optimization of the $S table (that is the table created for the CDI feature) is running over 12 hours now - and far from being finished. From the logfile, I can see that it optimizes 1000 rows every 20 minutes. Here is the output of the logfile:
Oracle Text, 11.2.0.3.0
14:33:05 06/26/12 begin logging
14:33:05 06/26/12 event
14:33:05 06/26/12 process $N for optimize: SEQDEV.GEN_GES_DESCRIPTION_CTX_I
14:33:16 06/26/12
14:33:16 06/26/12
[code]....
I haven't found a recommendation from Oracle not to use "optimize_index" for Domain Indexes with CDI. But in my case, it would be much faster just to drop and recreate the Domain Index in question.
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Jun 28, 2011
I have a huge table (about 60 gb) partition over range. The index on this table is global index created on 4 columns together. I have a query which is running very slowly. The explain plan is showing the use of this global index.Explain plan is not showing pstart and pend because the index is global.
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Jun 23, 2011
I have a global index and I want to convert it to local index.Is there a way to recreate local index with out dropping the global index.
I can create a local index first and then drop the global index. But is there a way to create it with out dropping the global index, just convert it.
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Nov 29, 2010
I am facing the error "ORA-01502: index or partition of such index is in unusable state " while loading the text data using
sql loader with direct path (direct = Y ,rows = 10000) option. Table consists an composite non unique index. If I query the dba indexes for the effected index it shows the index status as VALID. There was no maintaince done on the effected table or index. I have tried loading the same data using conventional path but didn't found any issues for the same.
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Nov 19, 2010
I have a query which had a join:
a.c1=b.c1 and a.c2=@var
where @var is user supplied input at runtime...We had a index on a.c2 . The CBO would use this index to generate an opitimised query plan.We found some records from table "b" were dropping due to inner join. So we made a change in join. It'd be like
a.c1(+)=b.c1 and nvl(a.c2,@var)=@var
This query is no longer using the index, instead its doing a full table scan causing the query to slowdown.I have tried creating index on nvl(a.c2,'31-dec-9999')
But the CBO won't use it.Anyway to create index on this col so that full table scan can be avoided?
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Aug 9, 2013
How to force an index if the table not using the index?
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Aug 27, 2012
We have occurrences of enq : TX - index contentions in the database. Using the SQL ID, we have identified the INSERT statement and the table which they are trying to insert.
This table has almost 25 different indexes, some of which are unique as well.I am wondering how to identify the actual index causing issue, out of these 25 indexes.
Is there any way to pin point to the name of index which is causing the lock?My plan is, once the index is identified, I would like to check the extents and inittrans and other attributes of this index to fix.
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Jul 11, 2012
Can we create non-cluster index on a clustered index?
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Aug 3, 2010
Any on give explanation for difference between Index and Clustered Index?
It will be great if i get explanation how memory allocation and Execution takes place.?
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