Column Name Under Explain Table
Nov 4, 2013
Explain plan for <SQL_STATEMENT>" and ranselect plan_table_output from table(dbms_xplan.display()) afterward.
There's an object "vm_nwvm_1" under the column "name" and I have no ideas where this objects come from. I query the table user_objects and look for the name and I don't see it. Before the I did dbms_stat command on the schema. My performance was very reason able and I didn't see the object "vm_nwvm_1" under the explain plan. I only see it after "dbms_stat".
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May 12, 2011
I have created an non unique index lk_fein on lookup_fein( code,map_id,trash). When I check the explain plan it does a full table scan on lookup_fein. if I force it to use index by it does and the cost also decreases.
SQL> SELECT WORK_FEIN,
2 NON_FEIN ,
3 FI_FEIN ,
4 MFEIN ,
5 TOTAL_FEIN ,
[code]...
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Oct 3, 2013
I saw code in KEY-CLRFRM trigger...
Declare
Itm1 varchar2(30) := :system.trigger_item;
Begin
CLEAR_FORM(NO_VALIDATE,FULL_ROLLBACK);
:B1.NEW_FORM := :SYSTEM.CURRENT_FORM; --Here B1 is the Block Name
Go_Item(Itm1);
End;
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May 24, 2012
what privilege is require for a user to execute explain plan? I get below error while try to execute explain plan.
SQL> explain plan for SELECT /*+ FULL(t) */ COUNT(*) FROM "DREAM"."CONSUMER.TAB" t WHERE ROWNUM <= 1000000;
explain plan for SELECT /*+ FULL(t) */ COUNT(*) FROM "DREAM"."CONSUMER.TAB" t WHERE ROWNUM <= 1000000
*
ERROR at line 1:
ORA-01031: insufficient privileges
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Jul 1, 2013
We have recently upgraded application (from Oracle Applications 11.5.9 to 12.1.3) and database (from 9.2.0.5.0 to 11.2.0.3.0).Since we are confronting to performances issues, i try to analyse some queries which Explains plans seems strange (in my opinion).Studying one of them i discover the next case (which according to my logic, i can't explain): --
Just bind variable --select *from MTL_MATERIAL_TRANSACTIONS mmtwhere 1 = 1and mmt.INVENTORY_ITEM_ID = :p1and mmt.ORGANIZATION_ID = :p2and mmt.TRANSACTION_REFERENCE = :p3--and mmt.SUBINVENTORY_CODE = :p4 PlanSELECT STATEMENT ALL_ROWS Cost: 5 Bytes: 361 Cardinality: 1 2 TABLE ACCESS BY INDEX ROWID TABLE INV.MTL_MATERIAL_TRANSACTIONS Cost: 5 Bytes: 361 Cardinality: 1 1 INDEX RANGE SCAN INDEX XXSPE.XXSPE_MTL_MATERIAL_TRANSAC_N99 Cost: 3 Cardinality: 2-- Nvl on bind variable --select *from MTL_MATERIAL_TRANSACTIONS mmtwhere 1 = 1and mmt.INVENTORY_ITEM_ID = :p1and
[code]...
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Aug 17, 2012
I am facing a weird situation wherein the explain plan of same sql in SIT and PROD is different.In fact the explain plan is very costly in Prod.Also the DB version of both SIT and PROD is same.
Below is the sql and corresponding explain plan in Prod and SIT respectively.
Query:
SELECT seq,CCN,ProcessorPart,root_item,comp_path,Item,comp_item,comp_item_type,
lag(comp_item_type,1,'PART') over(PARTITION BY seq ORDER BY lvl)Nxt_comp_item_type,lvl,bom_qty,
ROUND(CASE min(abs(bom_qty)) OVER (PARTITION BY seq ORDER BY lvl)
WHEN 0 THEN 0 ELSE 1 END * EXP (SUM (LN (nullif(abs(bom_qty),0))) OVER (PARTITION BY seq ORDER BY lvl))) Ulti_qty,
'AMER'
[code]...
The tables referred in above query is small tables containing arnd 10k records.The above tables are partitioned on Region and not indexed.
Explain Plan in Prod: COST CARDINALITY BYTES
SELECT STATEMENT, GOAL = ALL_ROWS165173613539322883634804
SORT UNIQUE236360
UNION-ALL
PARTITION LIST SINGLE117240
[code]...
Explain Plan in SIT: COST CARDINALITY BYTES
SELECT STATEMENT, GOAL = ALL_ROWS3211689
SORT UNIQUE347240
UNION-ALL
PARTITION LIST SINGLE172120
[code]...
I am not able to attribute why there is a huge change in Cost between SIT and Prod.Apparently the Job is going for 3-5 hours which used to get completed within 20mins in SIT.
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Oct 24, 2011
however I was able to identify a poorly performing query that seemed to be maxing out our CPU. I have been trying to understand the Explain Plan. The plan below is from our test system which has considerably less information in the tables than our PROD system.
I can see there are a bunch of table scans at the end which may indicate missing indexes, but I am unclear on whether this is actually a problem as the %CPU seems to be worse for the JOIN near the top of the plan.
-------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time | Inst |IN-OUT|
-------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1870M| 3018G| | 677M (1)|999:59:59 | | |
| 1 | SORT ORDER BY | | 1870M| 3018G| 3567G| 677M (1)|999:59:59 | | |
[code]...
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Jul 3, 2009
How to find explain plan of a query in oracle using TOAD(any) and SQL Developer(any)?
If there any functional key to find out let me know.
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Sep 7, 2011
1. In previous version of Toad (9.7.2) during executing a statement I was able to click on 'Explain plan current statement'. In this version of Toad (10.6.0. 42) is not a possible to do it.In the Toad options I've filled the sign: "use a separate connection when Toad itself is generating transactions"
2. During executing a statement I still see 'clock' cursor.Is it a possible to disable to see it?
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Dec 14, 2010
I need to warn readers that I am not a DBA but am heavily involved in application development. Whatever I know about database tuning is whatever I've managed to pick up via self-learning, and I must admit that the sum total of my knowledge isn't a lot.
Anyway, our "DBAs" recently did an upgrade to our 10g database, going from version 10.2.0.2.0 to 10.2.0.4.0. Immediately after the upgrade, a particular query has started to under-perform. The query itself was not altered in any way during the upgrade.
We have two explain plans for the query, a before and an after plan. The two plans are similar but not identical. The plans are too massive to post here, so I hope the following synopsis of the differences will do.
The 10.2.0.2.0 plan:
shows a HASH GROUP BY
has a TempSpc column in the explain plan
shows a particular table (EMP_HISTORY) as having ~1700 rows
The 10.2.0.4.0 plan:
shows SORT GROUP BY instead of HASH GROUP BY does not show a TempSpc column in the explain plan shows the EMP_HISTORY table as having only 25 rows
Other than these points, no other discernible differences can be noted. I'm wondering what would cause HASH to change to SORT. I'm told that stats are up-to-date.
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Jul 21, 2010
I have two Oracle instances that are setup identically.When I run a query on one of them, it takes around 3 seconds, on the other it takes around 200 seconds.
I have looked at the explain plans, and it has shown me what I think is the problem. On one instance, it does a join on two tables, then runs the other filter/access predicates. On the other instance it runs the filter/access predicated first, then does the expensice join. The one that does the join first is the one that takes around 200 seconds. How to tell Oracle to make this join after runnning the other predicates?
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Aug 3, 2010
when i runnung the explain plan syntax , show error :
running --- SELECT * FROM TABLE(dbms_xplan.display) ;
ERROR: an uncaught error in function display has happened;
please contact Oracle support
Please provide also a DMP file of the used plan table
PLAN_TABLE
ORA-00904: "OTHER_TAG": 無效的 ID
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Dec 12, 2011
since the optimizer (during explain plan) assumes all bind variable to be of varchar type, while checking plan for SQL statement using bind variable of numeric and date type shall we convert (typecast) it as following?
variable n_sal number
variable dt_joining date
exec n_sal:= 1000
exec dt_joining := '12-dec-2005'
select first_name from emp_data where sal=to_number(n_sal) and joining=to_date(dt_joining);
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May 15, 2011
i have two questions.
(1) how can i fill some value in a table column based on some existing column value automatically without user intervention. my actual problem is i have 'expiry date' column and 'status'. the 'status' column should get filled automatically based on the current system date. ex: if expiry date is '25-Apr-2011' and current date is '14-May-2011', then status should be filled as 'EXPIRED'
(2)hOw can i build 'select' query in a report (report 6i) so that it will show me list of items 'EXPIRED' or 'NOT EXPIRED' or both expired and not expired separately in a single report based on user choice. 'EXPIRED' & 'NOT EXPIRED' can be taken from the above question no. 1.
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May 11, 2012
I am trying to update currency column of one table using the currency column of other table using the following sql code.
update ODS.SO_ITEM OSI
set CURRENCY__CODE=(select currency__code from sa_sales.SO_ITEM SSI where SSI.ID=OSI.ID)
This update is taking taking a lot of time and is never ending.
should i create index on source table (SA_SALES.SO_ITEM) or on target table (ODS.SO_ITEM) ?
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Jun 16, 2010
How to add column 'col_new' in below table after the column 'col1'?
Table name: ofq1
table structure.
columnname datatype
------- -------
COL1VARCHAR2(20 BYTE)
COL2NUMBER
COL3DATE
COL4DATE
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Feb 22, 2011
if a table contains two columns and both are part of the primary key of that table (Kind of obvoius).
should i opt for a index organized tbale in this case ?Or should i opt for another running sequential colum which would serve as a primary key of this table and define the actual two columns of the system as unique keys.
there is a drawback if a most of the tables of a database contain composite primary keys?
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Jul 18, 2012
I am trying to join column names from a table with data from a different table. I think i should be able to pass the parameter to a 'select list' in a query. Look at my sample data below. And the data in sales table can grow till 15 rows and similarly corresponding columns in saleshist.
CREATE TABLE SALESHIST
(
PRODUCT VARCHAR2(30 BYTE),
Q1 VARCHAR2(30),
Q2 VARCHAR2(30),
Q3 VARCHAR2(30),
Q4 VARCHAR2(30)
)
[code]......
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Sep 28, 2012
I have a requirement as to find all the tables and columns containing keyword "SELECT" in my database. I followed forum
Re: How to find the column name and table name with a value
But when i run the below query on 11.0.2g Oracle Database
select table_name,
column_name,
:search_string search_string,
result
from (select column_name,
[Code]...
I get
ORA-29913: error in executing contains callout ORA-20000: Oracle Text error: 29913. 00000 - "error in executing %s callout"
*Cause: The execution of the specified callout caused an error.
*Action: Examine the error messages take appropriate action.
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Aug 17, 2011
I have two table country and state.Columns are given below
SQL> DESC Country
Name Null? Type
----------------- -------- --------------
PRIMARY_KEY NOT NULL NUMBER
DISPLAY_ORDER NOT NULL NUMBER
NAME NOT NULL VARCHAR2(50)
TREE_POSITION NOT NULL VARCHAR2(250)
PARENT_ID NUMBER
SQL> desc state
Name Null? Type
----------------- -------- -------------------------
PRIMARY_KEY NOT NULL NUMBER
DISPLAY_ORDER NOT NULL NUMBER
NAME NOT NULL VARCHAR2(50 CHAR)
VALUE NOT NULL VARCHAR2(50 CHAR)
TREE_POSITION NOT NULL VARCHAR2(250 CHAR)
PARENT_ID NUMBER
Now I have to insert the values in the state table taking from the country table.
EXAMPLE :
INSERT INTO STATE (PRIMARY_KEY, DISPLAY_ORDER, NAME, VALUE, PARENT_ID, TREE_POSITION) VALUES (251, 1, 'Alaska', 'AK', 233, 'STAT_USUS_AKAK');
but here the tree position is static it can be anything at the client side so I want to make it dynamic. So to make dynamic what I have used is mentioned below:
INSERT INTO STATE
(PRIMARY_KEY,DISPLAY_ORDER,NAME, VALUE,
PARENT_ID,
TREE_POSITION)
VALUES
[code].....
Now I want that Quote: select tree_position from L_STATE_ITEM where name ='United States')||'_ALAL' which i have used in the state table to put value in the tree_position, I want to make the other half part after the concatenation operator "_ALAL" also dynamic.
So I was just wondering If I can pic that value from the "VALUE COLUMN" of the same table.
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Dec 29, 2010
How can I add new column at the specified location in a oracle table? I am having a flat file from which data is inserted to the table..But initially I don't need that column so I m not having this column in the table but if further i need that column at the particular location then how can I do this..?
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Oct 22, 2010
I have a table ITEM as under;
ARTICLE VRTCODENAMESTATUSNEW_NAME
4KABAN.NM.12.21121143SU19I
4KABAN.NM.12.21564101SU23I
4KABAN.NM.24,5.22491015SR08I
4KABAN.NM.24,5.23181038SR22I
4KABAN.NM.24,5.23491015SR08I
4KABAN.NM.24,5.24121161SR26I
how to update the filed from NAME to NEW_NAME, I need following output.
ARTICLE VRTCODENAMESTATUSNEW_NAME
4KABAN.NM.12.21121143SU19ISU19
4KABAN.NM.12.21564101SU23ISU23
4KABAN.NM.24,5.22491015SR08ISR08
4KABAN.NM.24,5.23181038SR22ISR22
4KABAN.NM.24,5.23491015SR08ISR08
4KABAN.NM.24,5.24121161SR26ISR26
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Nov 5, 2012
I have some tables. TABLE1 contains columns called query_id and a column called List_name TABLE2 holds a list of data and the TABLE_NAME = value in TABLE1 held under LIST_NAME TABLE3 contains column with Query_ID and other info.
Is it possible to grab the entry in TABLE1 under LIST_NAME as a TABLE_NAME in a data source?
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Dec 3, 2008
I'm having a table which has a column which has values given inside square brackets.
[[[123412]]] ,[[[[werer34]]]],'[[qw2_w3rt]]
Now, the requirement is to get the values which are inside the innermost square brackets.Such as in
First case : 123412
Second one: werer34
Third : qw2_w3rt
Only the values inside are needed. Is there any way to achieve it using Pl-Sql or just using Sql ?
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May 17, 2012
i'v a problem regarding dual table,i logged to oracle as sys as sysdba and i add a column to dual table and then want to delete that added column but oracle gives "ORA-12988: cannot drop column from table owned by SYS"
i'm not able to drop any user oracle gives "ORA-00604: error occurred at recursive SQL level 1" "ORA-01031: insufficient privileges"
another error:: SP2-0575: Use of Oracle SQL feature not in SQL92 Entry Level oracle gives error when i want to switch user all problems starts when i add that column to dual table
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Sep 2, 2009
I want to find out all the tables that contains a known column name?
I know a column name called 'receiving_number', but don't what what table it's in.
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Oct 29, 2010
why the dual table has only column?
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Aug 30, 2010
How to set default value of particular column of a table ?
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Nov 9, 2011
To find out column in which table it is located.
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Jul 22, 2010
I have one table which has 90 columns all has varchar2 datatype except one Column[primary key (Number)]. In this Table we have 1000 records, I want to fetch those records from Table which has value in all 90 columns means there is no null value in any column.
I know simple method Like this :-
column_name1 IS NOT NULL AND Column_name2 IS NOT NULL.
Like this we can write IS NOT NULL condition for all column.Is there any other way to write this Query because it makes Query very longer and it is very tedious job to write this Condition for all Columns.
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