Delete not using indexes
Hi, I'm a fairly new user of Oracle XMLDB 9.2.0.4 so please bear with me. I registered a schema and inserted about 130k rows into an XMLType table. Retrieval time took a severe hit as expected, but I created some indexes and it seemed to solve the problem. Autotrace showed that indexes were working correctly.
However, delete does not seem to use those indexes, and instead performs a full table scan. The only difference between the statements used were:
SELECT * FROM <table> where existsNode(...)
DELETE FROM <table> where existsNode(...)
Does anyone know how to alleviate full table scans on deletes?
Thanks in advance,
Justin
Thanks for your time Mark.
I messed around with 9.2.0.4 a little more, and realized that delete will use the index if it's an element that is indexed (like your example pointed out). However, delete doesn't seem to use indexed attributes.
(Deleting based on an indexed element)
explain plan for
delete
from purchaseorder x
where existsNode ( value(x), '/PurchaseOrder/LineItems/LineItem[@ItemNumber="1"]/Part[@Id="715515011129"]') = 1
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | DELETE STATEMENT | | 1 | 19946 | 1 |
| 1 | DELETE | PURCHASEORDER | | | |
|* 2 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 19946 | 1 |
|* 3 | INDEX RANGE SCAN | IPURCHASEORDERUSER | 2 | | 1 |
(retrieving based on an indexed attribute)
explain plan for
select value(x)
from purchaseorder x
where existsNode ( value(x), '/PurchaseOrder/LineItems/LineItem[@ItemNumber="1"]/Part[@Id="715515011129"]') = 1
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | SELECT STATEMENT | | 1 | 24142 | 6 |
|* 1 | INDEX RANGE SCAN | SYS_IOT_TOP_35381 | 1 | 2038 | 2 |
|* 2 | INDEX RANGE SCAN | SYS_IOT_TOP_35386 | 1 | 4214 | 2 |
| 3 | NESTED LOOPS | | 1 | 24142 | 6 |
| 4 | SORT UNIQUE | | | | |
|* 5 | INDEX UNIQUE SCAN | SYS_IOT_TOP_35386 | 1 | 4216 | 2 |
|* 6 | INDEX RANGE SCAN | ILINEITEMPARTNUMBER | 1 | | 2 |
|* 7 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 4 | 79704 | 1 |
|* 8 | INDEX UNIQUE SCAN | SYS_C003455 | 102 | | |
Predicate Information (identified by operation id):
1 - access("SYS_NT5e0stCgbSQ6Dg7Md7+/Y0A=="."NESTED_TABLE_ID"=:B1)
2 - access("SYS_NTyLtUmo5HRjCEB+0PWmS+kA=="."NESTED_TABLE_ID"=:B1)
5 - access("SYS_NTyLtUmo5HRjCEB+0PWmS+kA=="."ITEMNUMBER"=1)
filter("SYS_NTyLtUmo5HRjCEB+0PWmS+kA=="."SYS_NC00011$"='715515011129')
6 - access("SYS_NTyLtUmo5HRjCEB+0PWmS+kA=="."ITEMNUMBER"=1)
7 - filter(SYS_CHECKACL("SYS_ALIAS_4"."ACLOID","SYS_ALIAS_4"."OWNERID",xmltype(''<
privilege xmlns="http://xmlns.oracle.com/xdb/acl.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-pr
operties/><read-contents/></privilege>''))=1)
8 - access("SYS_NTyLtUmo5HRjCEB+0PWmS+kA=="."NESTED_TABLE_ID"="SYS_ALIAS_4"."SYS_N
C0003400035$")
Note: cpu costing is off
(Deleting based on indexed attribute)
explain plan for
delete
from purchaseorder x
where existsNode ( value(x), '/PurchaseOrder/LineItems/LineItem[@ItemNumber="1"]/Part[@Id="715515011129"]') = 1
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | DELETE STATEMENT | | 1 | 19946 | 13 |
| 1 | DELETE | PURCHASEORDER | | | |
|* 2 | FILTER | | | | |
|* 3 | TABLE ACCESS FULL | PURCHASEORDER | 1 | 19946 | 2 |
|* 4 | COLLECTION ITERATOR PICKLER FETCH| | | | |
Predicate Information (identified by operation id):
2 - filter( EXISTS (SELECT /*+ */ 0 FROM
TABLE(SYS_OP_ATG(SYS_OP_ATG(:B1,10,11,3),2,3,3)) "KOKBF$" WHERE
SYS_OP_ATG(VALUE(KOKBF$),2,3,2)=1 AND SYS_OP_ATG(SYS_OP_ATG(VALUE(KOKBF$),4,5,3),2,3,2
)='715515011129'))
3 - filter(SYS_CHECKACL("SYS_ALIAS_4"."ACLOID","SYS_ALIAS_4"."OWNERID",xmltype(''<p
rivilege xmlns="http://xmlns.oracle.com/xdb/acl.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><update/>
<unlink-from/></privilege>''))=1)
4 - filter(SYS_OP_ATG(VALUE(KOKBF$),2,3,2)=1 AND
SYS_OP_ATG(SYS_OP_ATG(VALUE(KOKBF$),4,5,3),2,3,2)='715515011129')
Note: cpu costing is off
Thanks again,
Justin
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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] -
hi all.
I want to know wich querys in not using indexes. this is posible??
My db version is 10.2
Thanks.gomcar wrote:
hi all.
I want to know wich querys in not using indexes. this is posible??
My db version is 10.2
Thanks.Here is something that I just put together as a possible solution. You probably do not want to execute this SQL statement frequently as it might cause a latching problem (note, not thoroughly tested):
SELECT /*+ ORDERED */
SP.SQL_ID,
SP.HASH_VALUE,
SP.CHILD_NUMBER,
S.SQL_TEXT
FROM
(SELECT
SP.SQL_ID,
SP.HASH_VALUE,
SP.CHILD_NUMBER,
SUM(DECODE(INSTR(SP.OBJECT_TYPE,'INDEX'),0,0,1)) COUNTER
FROM
V$SQL_PLAN_STATISTICS_ALL SP
WHERE
SP.OBJECT_TYPE IS NOT NULL
GROUP BY
SP.SQL_ID,
SP.HASH_VALUE,
SP.CHILD_NUMBER
HAVING
SUM(DECODE(INSTR(SP.OBJECT_TYPE,'INDEX'),0,0,1))=0) SP,
V$SQL S
WHERE
SP.SQL_ID=S.SQL_ID
AND SP.HASH_VALUE=S.HASH_VALUE
AND SP.CHILD_NUMBER=S.CHILD_NUMBER
ORDER BY
S.SQL_TEXT;Explanation of the above:
The above looks at the stored execution plans for the queries currently in the shared pool, throwing out any line in the plan where no object is specified. If the OBJECT_TYPE column is found to not contain the word INDEX, a 0 is returned, otherwise a 1 is returned for that line in the plan. The sum of this generated column is calculated for each plan, and those plans having the sum of the generated column equal to 0 are returned. This inline view then drives into the V$SQL view to retrieve the matching SQL statements. An ordered hint is used to make certain that Oracle drives from the inline view into V$SQL.
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc. -
We installed and configured a new environment of OBIEE and are trying to run a simple query in our data warehouse. This simple query takes only 7 seconds to complete in our previous data warehouse using TOAD but is taking 8+ minutes to complete in our new environment also using TOAD.
Looking at the explain plans, the query in the new environment is not using indexes. Does anyone have an idea why it is not using the indexes? We checked and all of the indexes have been created and still exist. We also ran Analyze again on the two tables used n the query but the query still did not use the indexes.
Please let me know if anyone has ideas ASAP since we are baffled.- Are the object statistics identical? The ANALYZE statement has been depricated for a while, particularly for data warehouse environments where there may be partitioning. Were you not using the DBMS_STATS package to gather statistics in the previous environment? Were statistics computed on the indexes?
- Can you post the two query plans (formatted via DBMS_XPLAN and including the filter conditions)? It is not immediately obvious to me what index(es) might be useful here unless one of the two conditions is particularly selective which doesn't seem terribly likely based on just the table names involved.
- When you do post the query plans, please use the \[code\] and \[code\] tags to preserve the white space so that the output is readable.
Justin -
1,i found a sql :select userid,repute from user_attribute where
repute>3000 order by repute desc
cost heavily;
SELECT STATEMENT Cost = 637
SORT ORDER BY
TABLE ACCESS FULL USER_ATTRIBUTE
2,i use: select index_name from user_indexes where table_name
= 'USER_ATTRIBUTE'
INDEX_NAME
IDX_USER_ATTRIBUTE_FACE
IDX_USER_ATTRIBUTE_POWER
IDX_USER_ATTRIBUTE_REPUTE
IDX_USER_ATTRIBUTE_USERID
so column repute has indexed
3, i use CBO with analysize shema compute
optimizer_index_caching integer 99
optimizer_index_cost_adj integer 5
4,i use: select /*index(IDX_USER_ATTRIBUTE_REPUTE)*/
userid,repute from user_attribute where repute>3000 order by
repute desc
i got same explain plan as old
5,why it can not use index to query,thanks.I think your optimizer hint syntax is wrong. you need a "+"
sign to indicate that the comment block is an optimizer hint,
and the table name is not optional in the index hints
select /*+ index(user_attribute
IDX_USER_ATTRIBUTE_REPUTE)*/
userid,repute from user_attribute where repute>3000 order
by
repute desc
also, try ...
select /*+ index_desc(user_attribute
IDX_USER_ATTRIBUTE_REPUTE)*/
userid,repute from user_attribute where repute>3000
This should order the result for you. -
select *
from hrm_career x
WHERE x.begin_date = ( SELECT MAX(begin_date)
FROM hrm_career y
WHERE y.employee_id = x.employee_id AND
begin_date <= SYSDATE AND
primary_job = 'Y') AND
x.primary_job = 'Y'
I have the above query which is not using the index created on the BEGIN_DT column
I tried to force using still not using
but when i apply a value say
select *
from hrm_career x
WHERE x.begin_date ='10-20-2007'
It is using index and resulting in very fast response
Can some throw some ideas on it...
Where should i look into here ..SQL> set autotrace traceonly
SQL> select *
2 from hrm_career x
3 WHERE x.begin_date = ( SELECT MAX(begin_date)
4 FROM hrm_career y
5 WHERE y.employee_id = x.employee_id AND
6 begin_date <= SYSDATE AND
7 primary_job = 'Y') AND
8 x.primary_job = 'Y';
13454 rows selected.
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=1417 Card=152 Bytes=
35568)
1 0 FILTER
2 1 SORT (GROUP BY) (Cost=1417 Card=152 Bytes=35568)
3 2 HASH JOIN (Cost=254 Card=47127 Bytes=11027718)
4 3 INDEX (FAST FULL SCAN) OF 'HRM_CAREER_PK' (UNIQUE) (
Cost=12 Card=25026 Bytes=500520)
5 3 TABLE ACCESS (FULL) OF 'HRM_CAREER' (Cost=81 Card=25
335 Bytes=5421690)
Statistics
3671 recursive calls
9 db block gets
1758 consistent gets
2130 physical reads
0 redo size
2217762 bytes sent via SQL*Net to client
10359 bytes received via SQL*Net from client
898 SQL*Net roundtrips to/from client
128 sorts (memory)
1 sorts (disk)
13454 rows processed
TKPROF
TKPROF: Release 9.2.0.6.0 - Production on Wed Dec 12 18:40:56 2007
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Trace file: qnhg_ora_500.trc
Sort options: default
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
ALTER SESSION SET EVENTS '10046 trace name context forever, level 8'
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 1 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
Misses in library cache during execute: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 34.45 34.45
select condition
from
cdef$ where rowid=:1
call count cpu elapsed disk query current rows
Parse 4 0.00 0.00 0 0 0 0
Execute 4 0.00 0.00 0 0 0 0
Fetch 4 0.00 0.00 0 8 0 4
total 12 0.00 0.00 0 8 0 4
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: SYS (recursive depth: 1)
Rows Row Source Operation
1 TABLE ACCESS BY USER ROWID CDEF$
select *
from hrm_career x
WHERE x.begin_date = ( SELECT MAX(begin_date)
FROM hrm_career y
WHERE y.employee_id = x.employee_id AND
begin_date <= SYSDATE AND
primary_job = 'Y') AND
x.primary_job = 'Y'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.07 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 898 0.00 2.39 2038 946 9 13454
total 900 0.00 2.46 2038 946 9 13454
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Rows Row Source Operation
13454 FILTER
25335 SORT GROUP BY
67496 HASH JOIN
25333 INDEX FAST FULL SCAN HRM_CAREER_PK (object id 25292)
25336 TABLE ACCESS FULL HRM_CAREER
Rows Execution Plan
0 SELECT STATEMENT GOAL: CHOOSE
13454 FILTER
25335 SORT (GROUP BY)
67496 HASH JOIN
25333 INDEX GOAL: ANALYZED (FAST FULL SCAN) OF 'HRM_CAREER_PK'
(UNIQUE)
25336 TABLE ACCESS GOAL: ANALYZED (FULL) OF 'HRM_CAREER'
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 898 0.00 0.00
SQL*Net more data to client 877 0.00 0.05
db file sequential read 1 0.01 0.01
db file scattered read 60 0.00 0.14
direct path write 9 0.00 0.00
direct path read 125 0.05 0.13
SQL*Net message from client 898 0.02 1.47
DELETE FROM PLAN_TABLE
WHERE
STATEMENT_ID=:1
call count cpu elapsed disk query current rows
Parse 2 0.00 0.00 0 0 0 0
Execute 2 0.00 0.00 0 6 6 6
Fetch 0 0.00 0.00 0 0 0 0
total 4 0.00 0.00 0 6 6 6
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Rows Row Source Operation
0 DELETE
0 TABLE ACCESS FULL PLAN_TABLE
Rows Execution Plan
0 DELETE STATEMENT GOAL: CHOOSE
0 DELETE OF 'PLAN_TABLE'
0 TABLE ACCESS (FULL) OF 'PLAN_TABLE'
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 14.77 14.79
select o.owner#,o.name,o.namespace,o.remoteowner,o.linkname,o.subname,
o.dataobj#,o.flags
from
obj$ o where o.obj#=:1
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 3 0 1
total 3 0.00 0.00 0 3 0 1
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: SYS (recursive depth: 1)
EXPLAIN PLAN SET STATEMENT_ID='PLUS74964' FOR select *
from hrm_career x
WHERE x.begin_date = ( SELECT MAX(begin_date)
FROM hrm_career y
WHERE y.employee_id = x.employee_id AND
begin_date <= SYSDATE AND
primary_job = 'Y') AND
x.primary_job = 'Y'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.01 0 4 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.01 0 4 0 0
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
insert into plan_table (statement_id, timestamp, operation, options,
object_node, object_owner, object_name, object_instance, object_type,
search_columns, id, parent_id, position, other,optimizer, cost, cardinality,
bytes, other_tag, partition_start, partition_stop, partition_id,
distribution, cpu_cost, io_cost, temp_space, access_predicates,
filter_predicates )
values
(:1,SYSDATE,:2,:3,:4,:5,:6,:7,:8,:9,:10,:11,:12,:13,:14,:15,:16,:17,:18,:19,
:20,:21,:22,:23,:24,:25,:26,:27)
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 6 0.00 0.00 0 3 6 6
Fetch 0 0.00 0.00 0 0 0 0
total 7 0.00 0.00 0 3 6 6
Misses in library cache during parse: 1
Misses in library cache during execute: 2
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN) (recursive depth: 1)
Rows Execution Plan
0 INSERT STATEMENT GOAL: CHOOSE
select o.name, u.name
from
sys.obj$ o, sys.user$ u where obj# = :1 and owner# = user#
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 0 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 1 0.00 0.00 0 0 0 0
Misses in library cache during parse: 1
Parsing user id: SYS (recursive depth: 1)
SELECT ID ID_PLUS_EXP,PARENT_ID PARENT_ID_PLUS_EXP,LPAD(' ',2*(LEVEL-1))
||OPERATION||DECODE(OTHER_TAG,NULL,'','*')||DECODE(OPTIONS,NULL,'','
('||OPTIONS||')')||DECODE(OBJECT_NAME,NULL,'',' OF '''||OBJECT_NAME||'''')
||DECODE(OBJECT_TYPE,NULL,'',' ('||OBJECT_TYPE||')')||DECODE(ID,0,
DECODE(OPTIMIZER,NULL,'',' Optimizer='||OPTIMIZER))||DECODE(COST,NULL,'','
(Cost='||COST||DECODE(CARDINALITY,NULL,'',' Card='||CARDINALITY)
||DECODE(BYTES,NULL,'',' Bytes='||BYTES)||')') PLAN_PLUS_EXP,OBJECT_NODE
OBJECT_NODE_PLUS_EXP
FROM
PLAN_TABLE START WITH ID=0 AND STATEMENT_ID=:1 CONNECT BY PRIOR ID=PARENT_ID
AND STATEMENT_ID=:1 ORDER BY ID,POSITION
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 22 0 6
total 4 0.00 0.00 0 22 0 6
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Rows Row Source Operation
6 SORT ORDER BY
6 CONNECT BY WITH FILTERING
1 NESTED LOOPS
1 TABLE ACCESS FULL PLAN_TABLE
1 TABLE ACCESS BY USER ROWID PLAN_TABLE
5 NESTED LOOPS
6 BUFFER SORT
6 CONNECT BY PUMP
5 TABLE ACCESS FULL PLAN_TABLE
Rows Execution Plan
0 SELECT STATEMENT GOAL: CHOOSE
6 SORT (ORDER BY)
6 CONNECT BY (WITH FILTERING)
1 NESTED LOOPS
1 TABLE ACCESS (FULL) OF 'PLAN_TABLE'
1 TABLE ACCESS (BY USER ROWID) OF 'PLAN_TABLE'
5 NESTED LOOPS
6 BUFFER (SORT)
6 CONNECT BY PUMP
5 TABLE ACCESS (FULL) OF 'PLAN_TABLE'
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 0.09 0.09
SELECT ID ID_PLUS_EXP,OTHER_TAG OTHER_TAG_PLUS_EXP,OTHER OTHER_PLUS_EXP
FROM
PLAN_TABLE WHERE STATEMENT_ID=:1 AND OTHER_TAG IS NOT NULL ORDER BY ID
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 3 0 0
total 3 0.00 0.00 0 3 0 0
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
Rows Row Source Operation
0 SORT ORDER BY
0 TABLE ACCESS FULL PLAN_TABLE
Rows Execution Plan
0 SELECT STATEMENT GOAL: CHOOSE
0 SORT (ORDER BY)
0 TABLE ACCESS (FULL) OF 'PLAN_TABLE'
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 0.00 0.00
ALTER SESSION SET EVENTS '10046 trace name context off'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 0 0 0
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 30 (ADMIN)
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 7 0.00 0.09 0 4 0 0
Execute 8 0.00 0.00 0 6 6 6
Fetch 901 0.00 2.39 2038 971 9 13460
total 916 0.00 2.49 2038 981 15 13466
Misses in library cache during parse: 6
Misses in library cache during execute: 1
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 906 0.00 0.00
SQL*Net message from client 906 34.45 50.82
SQL*Net more data to client 877 0.00 0.05
db file sequential read 1 0.01 0.01
db file scattered read 60 0.00 0.14
direct path write 9 0.00 0.00
direct path read 125 0.05 0.13
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 7 0.00 0.00 0 0 0 0
Execute 11 0.00 0.00 0 3 6 6
Fetch 5 0.00 0.00 0 11 0 5
total 23 0.00 0.00 0 14 6 11
Misses in library cache during parse: 4
Misses in library cache during execute: 2
9 user SQL statements in session.
6 internal SQL statements in session.
15 SQL statements in session.
5 statements EXPLAINed in this session.
Trace file: qnhg_ora_500.trc
Trace file compatibility: 9.02.00
Sort options: default
3 sessions in tracefile.
12 user SQL statements in trace file.
8 internal SQL statements in trace file.
15 SQL statements in trace file.
11 unique SQL statements in trace file.
5 SQL statements EXPLAINed using schema:
ADMIN.prof$plan_table
Default table was used.
Table was created.
Table was dropped.
3945 lines in trace file.
Message was edited by:
Maran Viswarayar -
Update databse from internal table statement not using index
Hi Guys,
We are updating a databse table from a file. The file has a couple of fields which have data different from what the database has (non-primary fields :). We upload the file data into an internal table and then update the database table from internal table. At a time, internal table is supposed to have 10,000 records. I did SQL trace and found that the update statement is not making use of the databse index.
Should not the update statement here be using the table index (for primary key)?
Regards,
Munish... as often there are recommendations in this forum which makes me wonder, how people overestimate their knowledge!!!
Updates and Deletes do of course use indexes, as can be seen in the SQL Trace (use explain).
Inserts don't use indexes, because in many databases inserts are just done somewhere, But also with the INSERT, the primary key is the constraint for the uniqueness condition, duplicate keys are not allowed.
Coming to the original question, what is you actually coding for the update?
What is the table, which fields are in the internal table and what are the indexes?
Siegfried -
Not using Index when SDO_RELATE in Spatial Query is used in LEFT OUTER JOIN
I want to know for every City (Point geometry) in which Municipality (Polygon geometry) it is.
Some cities will not be covered by any municipality (as there is no data for it), so its municipality name should be blank in the result
We have 4942 cities (point geometries)
and 500 municipalities (polygon geometry)
SELECT T1.NAME as City, T2.NAME as Municipality
FROM CITY T1
LEFT OUTER JOIN MUNICIPALITY T2 ON SDO_RELATE(T1.GEOM, T2.GEOM, 'MASK=ANYINTERACT') = 'TRUE'The explain plan for this query is:
SELECT STATEMENT
FILTER
Filter Predicates
MDSYS.SDO_RTREE_RELATE(T1.GEOM, T2.GEOM, 'mask=ANYINTERACT querytype=window ') = 'TRUE'
MERGE JOIN
TABLE ACCESS CITY FULL 11
BUFFER SORT 100605
TABLE ACCESS MUNICIPALITY FULL 20So the cost is in the BUFFER (whatever that is), it takes +2000 seconds to run this, it is not using the spatial index.
And we are not getting all rows, but only the ones interacting with a municipality, e.g. 2436 rows.
But I want all rows, including the ones not interacting with any Municipality.
When we want only those cities that actually are in a municipality, I use a different query and it will use the index.
SELECT T1.NAME as City, T2.NAME as Municipality
FROM CITY T1, MUNICIPALITY T2
WHERE SDO_RELATE(T1.GEOM, T2.GEOM, 'MASK=ANYINTERACT') = 'TRUE'I get (only) 2436 rows (as expected) in 5 seconds (it is fast) and the explain plan shows it is using the spatial index.
But in this case, I am not getting any cities not inside any municipality (of course)
SELECT STATEMENT
NESTED LOOPS
TABLE ACCESS MUNICIPALITY FULL 22
TABLE ACCESS CITY BY INDEX ROWID 22
DOMAIN INDEX CITY_SDX 0
Access Predicates
MDSYS.SDO_RTREE_RELATE(T1.GEOM, T2.GEOM, 'mask=ANYINTERACT querytype=window ') = 'TRUE'I always thought a LEFT OUTER JOIN would return all rows from the Table, whatever happens in the next,
but it seems the query has been rewritten so that it is now using a Filter Predicate in the end, which filters those geometries having no interaction.
As an example I also do thing alphanumerically, I do get 4942 rows, including the ones which have no Municipality name.
In this case the names must match, so its only for testing if the LEFT OUTER JOIN returns stuff correctly, which it does in this case.
SELECT T1.NAME as City, T2.NAME as Municipality
FROM CITY T1
LEFT OUTER JOIN MUNICIPALITY T2 ON T1.NAME = T2.NAMEIs this an Oracle Spatial bug, e.g. not return 4942 rows, but only 2436 rows on the first query?
Note all tests performed on Oracle 11g R2 (11.2.0.1.0)Patrick,
Even so, your geoms in the relate were the wrong way around.
Also, I don't recall you saying (or showing) that you wanted the municipality geometry returned. Still,
no matter, easy to do.
Here are some additional suggestions. I don't have your data so I have had to use some of my own.
set serveroutput on timing on autotrace on
SELECT T1.SPECIES as City,
(SELECT T2.ADMIN_NAME FROM AUSTRALIAN_STATES T2 WHERE SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE') as Municipality,
(SELECT T2.GEOM FROM AUSTRALIAN_STATES T2 WHERE SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE') as geom
FROM GUTDATA T1;
762 rows selected
Elapsed: 00:00:21.656
Plan hash value: 2160035213
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 762 | 49530 | 5 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| AUSTRALIAN_STATES | 1 | 115 | 0 (0)| 00:00:01 |
|* 2 | DOMAIN INDEX | AUSTRALIAN_STATES_GEOM_SPX | | | 0 (0)| 00:00:01 |
| 3 | TABLE ACCESS BY INDEX ROWID| AUSTRALIAN_STATES | 1 | 115 | 0 (0)| 00:00:01 |
|* 4 | DOMAIN INDEX | AUSTRALIAN_STATES_GEOM_SPX | | | 0 (0)| 00:00:01 |
| 5 | TABLE ACCESS FULL | GUTDATA | 762 | 49530 | 5 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"(:B1,10000,0.5,'UNIT=M'))='TRUE')
4 - access("MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"(:B1,10000,0.5,'UNIT=M'))='TRUE')
Statistics
7 user calls
24576 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
0 TBS Extension: bytes extended
0 total number of times SMON posted
0 SMON posted for undo segment recovery
0 SMON posted for dropping temp segment
0 segment prealloc tasksThe above can look messy as you add more (SELECT ...) attributes, but is is fast (though can't use in Materialized Views).
/* The set of all cities not in municipalities */
SELECT T1.SPECIES as City,
cast(null as varchar2(42)) as municipality,
cast(null as sdo_geometry) as geom
FROM GUTDATA T1
WHERE NOT EXISTS (SELECT 1
FROM AUSTRALIAN_STATES T2
WHERE SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE')
UNION ALL
/* The set of all cities in municipalities */
SELECT T1.SPECIES as City,
T2.ADMIN_NAME as Municipality,
T2.GEOM as geom
FROM GUTDATA T1
INNER JOIN
AUSTRALIAN_STATES T2 ON (SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE');
762 rows selected
Elapsed: 00:00:59.953
Plan hash value: 2854682795
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 99 | 13450 | 38 (87)| 00:00:01 |
| 1 | UNION-ALL | | | | | |
|* 2 | FILTER | | | | | |
| 3 | TABLE ACCESS FULL| GUTDATA | 762 | 49530 | 5 (0)| 00:00:01 |
|* 4 | DOMAIN INDEX | AUSTRALIAN_STATES_GEOM_SPX | | | 0 (0)| 00:00:01 |
| 5 | NESTED LOOPS | | 61 | 10980 | 33 (0)| 00:00:01 |
| 6 | TABLE ACCESS FULL| AUSTRALIAN_STATES | 8 | 920 | 3 (0)| 00:00:01 |
|* 7 | TABLE ACCESS FULL| GUTDATA | 8 | 520 | 4 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter( NOT EXISTS (SELECT 0 FROM "AUSTRALIAN_STATES" "T2" WHERE "MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"(:B1,10000,0.5,'UNIT=M'))='TRUE'))
4 - access("MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"(:B1,10000,0.5,'UNIT=M'))='TRUE')
7 - filter("MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"("T1"."GEOM",10000,0.5,'UNIT=M'))='TRUE')
Statistics
7 user calls
131072 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
0 TBS Extension: bytes extended
0 total number of times SMON posted
0 SMON posted for undo segment recovery
0 SMON posted for dropping temp segment
0 segment prealloc tasksMuch slower but Materialized View friendly.
This one is a bit more "natural" but still slower than the first.
set serveroutput on timing on autotrace on
/* The set of all cities in municipalities */
WITH municipal_cities As (
SELECT T1.ID as City,
T2.ADMIN_NAME as Municipality,
T2.GEOM as geom
FROM GUTDATA T1
INNER JOIN
AUSTRALIAN_STATES T2 ON (SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE')
SELECT T1.ID as City,
T2.Municipality as Municipality,
T2.GEOM as geom
FROM GUTDATA T1
LEFT OUTER JOIN
municipal_cities T2
ON (T2.CITY = T1.ID);
762 rows selected
Elapsed: 00:00:50.228
Plan hash value: 745978991
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 762 | 44196 | 36 (3)| 00:00:01 |
|* 1 | HASH JOIN RIGHT OUTER| | 762 | 44196 | 36 (3)| 00:00:01 |
| 2 | VIEW | | 61 | 3294 | 33 (0)| 00:00:01 |
| 3 | NESTED LOOPS | | 61 | 10980 | 33 (0)| 00:00:01 |
| 4 | TABLE ACCESS FULL | AUSTRALIAN_STATES | 8 | 920 | 3 (0)| 00:00:01 |
|* 5 | TABLE ACCESS FULL | GUTDATA | 8 | 520 | 4 (0)| 00:00:01 |
| 6 | INDEX FAST FULL SCAN| GUTDATA_ID_PK | 762 | 3048 | 2 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - access("T2"."CITY"(+)="T1"."ID")
5 - filter("MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"("T1"."GEOM",10000,0.5,'UNIT=M'))='TRUE')
Statistics
7 user calls
49152 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
0 TBS Extension: bytes extended
0 total number of times SMON posted
0 SMON posted for undo segment recovery
0 SMON posted for dropping temp segment
0 segment prealloc tasksFinally, the Pièce de résistance: trick the LEFT OUTER JOIN operator...
set serveroutput on timing on autotrace on
SELECT T1.SPECIES as City,
T2.ADMIN_NAME as Municipality,
T2.GEOM as geom
FROM GUTDATA T1
LEFT OUTER JOIN
AUSTRALIAN_STATES T2
ON (t2.admin_name = to_char(t1.ID) OR
SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE');
762 rows selected
Elapsed: 00:00:50.273
Plan hash value: 158854308
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 762 | 92964 | 2294 (1)| 00:00:28 |
| 1 | NESTED LOOPS OUTER | | 762 | 92964 | 2294 (1)| 00:00:28 |
| 2 | TABLE ACCESS FULL | GUTDATA | 762 | 49530 | 5 (0)| 00:00:01 |
| 3 | VIEW | | 1 | 57 | 3 (0)| 00:00:01 |
|* 4 | TABLE ACCESS FULL| AUSTRALIAN_STATES | 1 | 115 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
4 - filter("T2"."ADMIN_NAME"=TO_CHAR("T1"."ID") OR
"MDSYS"."SDO_ANYINTERACT"("T2"."GEOM","SDO_GEOM"."SDO_BUFFER"("T1"."GEOM",10000,0.5,'UNIT=M'))='TRUE')
Statistics
7 user calls
0 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
0 TBS Extension: bytes extended
0 total number of times SMON posted
0 SMON posted for undo segment recovery
0 SMON posted for dropping temp segment
0 segment prealloc tasksTry these combinations to see what works for you.
Interestingly, for me, the following returns absolutely nothing.
SELECT T1.SPECIES as City,
T2.ADMIN_NAME as Municipality
FROM GUTDATA T1
LEFT OUTER JOIN
AUSTRALIAN_STATES T2
ON (SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE')
MINUS
SELECT T1.SPECIES as City,
T2.ADMIN_NAME as Municipality
FROM GUTDATA T1
LEFT OUTER JOIN
AUSTRALIAN_STATES T2
ON (t2.admin_name = to_char(t1.ID) OR
SDO_ANYINTERACT(T2.GEOM, SDO_GEOM.SDO_BUFFER(T1.GEOM,10000,0.5,'UNIT=M')) = 'TRUE');(I leave it to you to see if you can see why as the LEFT OUTER JOIN seems to be working correctly for me but I am not going to dedicate time to detailed checking of results.)
Note all tests performed on Oracle 11g R2 (11.2.0.1.0)
If you get the answer you want: mark the post as answered to assign points.
regards
Simon -
Optimizer not using index even after giving the hint
Hi All,
I am wondering why Optimixzer is not using the index in the below query
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
SQL> select column_expression
2 from ALL_IND_EXPRESSIONS
3 where table_name like 'GTXN_DTL_V1'
4 and index_name = 'IDX_TXN11_V1';
COLUMN_EXPRESSION
TO_DATE("BOOKING_DATE",'YYYYMMDD')
SQL> select num_rows from all_tables
2 where table_name like 'GTXN_DTL_V1';
NUM_ROWS
29020867
SQL> explain plan for select * from gtxn_dtl_v1 where to_date(booking_date,'yyyymmdd') = to_date('030109','DDMMRR');
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3140624094
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 55489 | 15M| 215K (4)| 00:43:08 |
|* 1 | TABLE ACCESS FULL| GTXN_DTL_V1 | 55489 | 15M| 215K (4)| 00:43:08 |
Predicate Information (identified by operation id):
1 - filter(TO_DATE("BOOKING_DATE",'yyyymmdd')=TO_DATE('030109','DDMMRR
14 rows selected.
--Giving Hint..
SQL> explain plan for select /*+ index(gtxn_dtl_v1 IDX_TXN11_V1) */ *
2 from gtxn_dtl_v1
3 where to_date(booking_date,'yyyymmdd') = to_date('030109','DDMMRR')
4 /
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3140624094
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 55489 | 15M| 215K (4)| 00:43:08 |
|* 1 | TABLE ACCESS FULL| GTXN_DTL_V1 | 55489 | 15M| 215K (4)| 00:43:08 |
Predicate Information (identified by operation id):
1 - filter(TO_DATE("BOOKING_DATE",'yyyymmdd')=TO_DATE('030109','DDMMRR
14 rows selected.Please suggest.
Thanks in advance,
Jeneeshporzer wrote:
Hi!
Why are you using the to_date ont the booking_date column? Is it a varchar2 column, what type is it.
Because if it's a varchar2 column you could simply use
select * from gtxn_dtl_v1 where booking_date = '20090103';
So you wouldn't even need a function based index.
On the other hand if it's a date you shouldn't do a to_date as well.
Best regards,
PPThat is not the original qury used in production. I am investigating on the prformance of the below query.
select txn.account_number,to_number(txn.amount_lcy) txn_amt,to_date(booking_date,'yyyymmdd') TXN_DATE,
sal.latest_sal,sal.sal_date,customer_name,employer_name,
decode(COMMUNICATION_TYPE_1,'MOBILE',COMMUNICATION_NO_1,decode(COMMUNICATION_TYPE_2,'MOBILE',COMMUNICATION_NO_2)) mob,
txn.CURRENCY, CHEQUE_NUMBER,trans_dets,trans_reference,target,teller_id,acc.category,acc.inactive_marker,acc.posting_restrict,cus.sector,cus.industry
from coreadmin.Gtxn_dtl_v1 txn,
(select account_number,round(to_number(nvl(amount_lcy,0)),2) latest_sal,TXN_DATE sal_date,rr
from
(select to_date(booking_date,'yyyymmdd') TXN_DATE,batch_id,account_number,amount_lcy
,row_number() over (partition by account_number order by to_date(booking_date,'yyyymmdd') desc NULLS LAST,batch_id desc nulls last) rr,
CURRENCY, CHEQUE_NUMBER,trans_dets,trans_reference
from coreadmin.Gtxn_dtl_v1
where transaction_code = '204'
and to_number(amount_lcy) > 0)
where rr = 1
) sal,customers_live cus,accounts_live acc
where to_date(booking_date,'yyyymmdd') between to_date('030109','DDMMRR') and to_date('030209','DDMMRR')
and txn.account_number = sal.account_number
and txn.CUSTOMER_ID = cus.CUSTOMER_number(+)
and acc.id = sal.account_number
and target in ('30','31','32')Edited by: jeneesh on Mar 25, 2009 12:38 PM
Corrected the query.
The column is of VARCHAR2 type. This is because, the table is loaded, through sqlldr, every day from flat files generated form GLOBUS banking system. Column is kept as VARCHAR2 to minimize the loading issues. -
"Tables are not using indexes"-Please help
We have a new database , version
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for IBM/AIX RISC System/6000: Version 10.2.0.1.0 - Productio
NLSRTL Version 10.2.0.1.0 - Production
We have created Indexes for the tables and analysed the table. Problem is , non of the tables are using indexes. Explain paln for the sql queries are showing full table scan.
Kindly let me know any parameter I have to change or is there any setttings needed on database level?
Thanks in advance.
Regards,
ChotuWhat is your optimizer mode?
Another question why you want to use indexes? Use of indexes depends,
Here is a simple example
test@>ed
Wrote file afiedt.buf
1 explain plan for
2 select c.cname from mytable c, mytable1 m
3* where c.cname=m.cname
test@>/
Explained.
test@>SELECT PLAN_TABLE_OUTPUT FROM TABLE(DBMS_XPLAN.DISPLAY());
PLAN_TABLE_OUTPUT
Plan hash value: 2460944079
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 8 | 64 | 1 (0)| 00:00:01 |
| 1 | NESTED LOOPS | | 8 | 64 | 1 (0)| 00:00:01 |
| 2 | INDEX FULL SCAN | C_MYTAB_IDX | 8 | 32 | 1 (0)| 00:00:01 |
|* 3 | INDEX RANGE SCAN| C_MYTAB1_IDX | 1 | 4 | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("C"."CNAME"="M"."CNAME")
15 rows selected.
test@>explain plan for
2 select * from mytable;
Explained.
test@>SELECT PLAN_TABLE_OUTPUT FROM TABLE(DBMS_XPLAN.DISPLAY());
PLAN_TABLE_OUTPUT
Plan hash value: 1229213413
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 8 | 32 | 3 (0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| MYTABLE | 8 | 32 | 3 (0)| 00:00:01 |
8 rows selected.As you see MYTABLE has an index but it not always uses that index it depends on the need.
sql queries are showing full table scan this is a not a curse. So unless you are having some problem. You should not change queries only because to avoid full table scans, there is no rule that indexes should always be used in every case.
Adith -
Hi,
I have query as under:
SELECT max(A.REGION_ID)
FROM SOP_REGION_COUNTRY_MAP A,
SOP_REGION_PRODLINE_MAP B,
SOP_REGION_ACTIVITY_MAP C
WHERE A.REGION_ID = B.REGION_ID
AND A.REGION_ID = C.REGION_ID
AND upper(trim(COUNTRY_NAME)) = upper(trim(:Var3))
AND upper(trim(STATE_NAME)) = upper(trim(:Var2))
AND upper(trim(PRODLINE_NAME)) = upper(trim(:Var1))
AND A.BATCH_JOB_IND = 1
AND B.BATCH_JOB_IND = 1The plan of the above query is as under:
SELECT STATEMENT, GOAL = CHOOSE Cost=7 Cardinality=1 Bytes=73
SORT AGGREGATE Cardinality=1 Bytes=73
NESTED LOOPS Cost=7 Cardinality=1 Bytes=73
HASH JOIN Cost=6 Cardinality=1 Bytes=68
TABLE ACCESS FULL Object owner=SOP Object name=SOP_REGION_COUNTRY_MAP Cost=3 Cardinality=1 Bytes=25
TABLE ACCESS FULL Object owner=SOP Object name=SOP_REGION_PRODLINE_MAP Cost=3 Cardinality=1 Bytes=43
INDEX RANGE SCAN Object owner=SOP Object name=FK1_SOP_REGION_ACTIVITY_MAP Cost=2 Cardinality=48 Bytes=240Now, this query does full table access of sop_region_country_map and sop_region_prodline_map even though it has index on country_name,state_name and prodline_name columns but as i have used Upper function the index is not used. Now, I need this upper function as business req. states that none of the comparison should be missed jsut because user has entered country,state and prodline in mixed cases...
Can you pls let me know what to do if i want to avoid this FTA and instaed use indexes.. without sacrificing Upper() functionlaity..?
Thxokay...its something like query rewrite grant for user...
when i give that...i can create functional index now..
but still i can use trunc() for functional index...it tells me that functional index can be created only for pure function...what is pure and impure function in oracle. -
SELECT DISTINCT eval.match_student_name (a.booking_id,
2059980
) "Student Name",
NVL (b.student_email, b.email_address) email_address,
a.booking_id "Student Registration Number",
b.customer_name "Company Name",
DECODE (b.pmt_confirmed,
'E', 'Exception',
'Y', 'Yes',
'N', 'No'
) "Confirmed Commitment ",
'1' "Edit", a.title "Class Id",
b.exception_comments "Exception Comments",
NVL (b.opn_member, 'N') "OPN_Member",
NVL (b.opn_partner_name, '-') "OPN Company Name",
a.booking_id "View Attendance",
DECODE (eval.check_bookingid_push_gsi (a.booking_id),
1, apex_item.checkbox (1, a.booking_id, 'Checked'),
apex_item.checkbox (1, a.booking_id, 'Disabled')
) "Select",
DECODE
(eval.check_bookingid_push_gsi (a.booking_id),
1, 'Ready TO push TO GSI',
2, 'In Progress',
3, 'Complete',
'MANUAL'
) "Booking ID Status"
FROM ( select * from eval.eattend_student_attendance where title = 2059980 ) a,
( select * from eval.eattend_student_info where verified_by IS NOT NULL ) b
WHERE
--AND b.verified_by IS NOT NULL
a.title = b.title
AND a.booking_id = b.booking_id
ORDER BY a.booking_idExecution Plan
Plan hash value: 3921177175
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 11 | 1870 | 353 (3)| 00:00:05 |
| 1 | SORT ORDER BY | | 11 | 1870 | 353 (3)| 00:00:05 |
| 2 | HASH UNIQUE | | 11 | 1870 | 352 (3)| 00:00:05 |
| 3 | NESTED LOOPS | | | | | |
| 4 | NESTED LOOPS | | 11 | 1870 | 351 (2)| 00:00:05 |
|* 5 | TABLE ACCESS FULL | EATTEND_STUDENT_ATTENDANCE | 11 | 176 | 318 (3)|
|* 6 | INDEX RANGE SCAN | PERF_EATTEND_STUDENT_INFO_N98 | 1 | | 2 (0)| 0
|* 7 | TABLE ACCESS BY INDEX ROWID| EATTEND_STUDENT_INFO | 1 | 154 | 3 (0)| 0
pls see the table full access of EATTEND_STUDENT_ATTENDANCE , i have a index in that table for a column being used in sql. why index not used ???
thanks
RajBecause Optimizer thinks that the query will take longer when using an index.
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:736825544526
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:9422487749968
Please use:
explain plan for [your query];and then
select * from table(dbms_xplan.display);when you want an execution plan. -
Simple query but not using index..please help??
I do have this column indexed. Why my query is not using this index?
Any help .
select count(*) from v_dis_sub_har;
SQL>
COUNT(*)
4543289
1 row selected.
SQL>
select vzw_vendor_id , count(*)
from v_dis_sub_har
group by vzw_vendor_id
SQL> 2 3 4
VZW_VENDOR_ID COUNT(*)
200091 908653
200013 908659
200012 908659
200057 908659
200031 908659
5 rows selected.
SQL> SQL>
explain plan for
select
event_seq
from v_dis_sub_har b
where b.VZW_VENDOR_ID='200013'
-- and b.status='P' and b.extract_date is null
SQL> 2 3 4 5 6 7
Explained.
SQL> SQL>
select plan_table_output from table(dbms_xplan.display)
SQL> SQL> 2
PLAN_TABLE_OUTPUT
Plan hash value: 2852398983
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 908K| 7986K| 3132 (16)| 00:00:38 |
|* 1 | TABLE ACCESS FULL| V_DIS_SUB_HAR | 908K| 7986K| 3132 (16)| 00:00:38 |
Predicate Information (identified by operation id):
PLAN_TABLE_OUTPUT
1 - filter("B"."VZW_VENDOR_ID"=200013)
13 rows selected.
SQL> SQL>You are right Justin. Oracle is not stupid as you may want to say some times when things do not happen according to you. I just created a bitmap index on status field and look what appened. Som times it uses bitmap index and some times it does not. And the reason is clear. Row count by status. 'S' status uses bitmap index where 'P' does not.
Thanks for your help.
select status, count(*)
from v_dis_sub_har
group by status
;SQL> 2 3 4
S COUNT(*)
A 5844982
P 2312759
S 20178
3 rows selected.
SQL>
explain plan for
select
event_seq
from v_dis_sub_har b
where
--b.VZW_VENDOR_ID=200013
-- and
b.status='S'
--and b.extract_date is null
select plan_table_output from table(dbms_xplan.display)
SQL> 2 3 4 5 6 7 8 9 10
Explained.
SQL> SQL> SQL> SQL> 2
PLAN_TABLE_OUTPUT
Plan hash value: 829738689
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| T
ime |
PLAN_TABLE_OUTPUT
| 0 | SELECT STATEMENT | | 20290 | 118K| 2772 (1)| 0
0:00:34 |
| 1 | TABLE ACCESS BY INDEX ROWID | V_DIS_SUB_HAR | 20290 | 118K| 2772 (1)| 0
0:00:34 |
| 2 | BITMAP CONVERSION TO ROWIDS| | | | |
|
|* 3 | BITMAP INDEX SINGLE VALUE | V_DISPATCH_SUBSCRIPTION_NDX2 | | | |
|
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
3 - access("B"."STATUS"='S')
15 rows selected.
SQL> SQL> set line 120
SQL> /
PLAN_TABLE_OUTPUT
Plan hash value: 829738689
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 20290 | 118K| 2772 (1)| 00:00:34 |
| 1 | TABLE ACCESS BY INDEX ROWID | V_DIS_SUB_HAR | 20290 | 118K| 2772 (1)| 00:00:34 |
| 2 | BITMAP CONVERSION TO ROWIDS| | | | | |
|* 3 | BITMAP INDEX SINGLE VALUE | V_DISPATCH_SUBSCRIPTION_NDX2 | | | | |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
3 - access("B"."STATUS"='S')
15 rows selected.
SQL>
explain plan for
select
event_seq
from v_dis_sub_har b
where
--b.VZW_VENDOR_ID=200013
-- and
b.status='P'
--and b.extract_date is null
select plan_table_output from table(dbms_xplan.display)
SQL> 2 3 4 5 6 7 8 9 10
Explained.
SQL> SQL> SQL> SQL> 2
PLAN_TABLE_OUTPUT
Plan hash value: 2852398983
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 2325K| 13M| 5784 (18)| 00:01:10 |
|* 1 | TABLE ACCESS FULL| V_DIS_SUB_HAR | 2325K| 13M| 5784 (18)| 00:01:10 |
Predicate Information (identified by operation id):
PLAN_TABLE_OUTPUT
1 - filter("B"."STATUS"='P')
13 rows selected.
SQL> -
Hi Experts,
Actually i have Production Partition table SMS_DELIVERY_NODETAILS its have partitions "PS_WD_01,PS_WD_02........... PS_WD_30". Partition base on date "TOOPERATOR" column like "10-11-2012 , 11-11-2012 ........".
I have create local index "DELIVERY_CAMP" on "CAMPAIGN_NAME" column.
I face issue in :
case 1: Query using index "DELIVERY_CAMP" when i was use query with partition name "PS_WD_07"
case 2: when query running with TOOPERATOR='2012-11-25' then table_sance_full.
Oracle version =10g
Os version = Linux 5.5
SQL> DESC SMS_DELIVERY_NODETAILS
Name Null? Type
MSISDN VARCHAR2(15)
TRANSACTIONID NOT NULL VARCHAR2(50)
TOOPERATOR VARCHAR2(25)
FROMOPERATOR VARCHAR2(25)
STATUS VARCHAR2(25)
TID_INDEX NUMBER
CAMPAIGN_NAME VARCHAR2(100)
NETWORK_ERROR_CODE VARCHAR2(20)
Case 1:
SQL> EXPLAIN PLAN FOR
2 SELECT count(*) from SMS_DELIVERY_NODETAILS partition(PS_WD_07) where CAMPAIGN_NAME ='1353814653772_ftp_Churnscore100_pe_100';
Explained.
SQL> set line 200
@?/rdbms/admin/utlxpls.sql
SQL>
PLAN_TABLE_OUTPUT
Plan hash value: 2934568714
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 1 | 38 | 53 (0)| 00:00:01 | | |
| 1 | SORT AGGREGATE | | 1 | 38 | | | | |
| 2 | PARTITION RANGE SINGLE| | 6320 | 234K| 53 (0)| 00:00:01 | 31 | 31 |
| 3 | PARTITION LIST ALL | | 6320 | 234K| 53 (0)| 00:00:01 | 1 | 100 |
|* 4 | INDEX RANGE SCAN | DELIVERY_CAMP | 6320 | 234K| 53 (0)| 00:00:01 | 3001 | 3100 |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
4 - access("CAMPAIGN_NAME"='1353814653772_ftp_Churnscore100_pe_100')
16 rows selected.
case 2:
SQL> SQL> EXPLAIN PLAN FOR
2 SELECT count(*) from SMS_DELIVERY_NODETAILS WHERE TOOPERATOR='2012-11-25' and CAMPAIGN_NAME ='1353814653772_ftp_Churnscore100_pe_100';
Explained.
SQL> @?/rdbms/admin/utlxpls.sql
PLAN_TABLE_OUTPUT
Plan hash value: 3258763602
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 1 | 58 | 76394 (2)| 00:15:17 | | |
| 1 | SORT AGGREGATE | | 1 | 58 | | | | |
| 2 | PARTITION RANGE SINGLE| | 1 | 58 | 76394 (2)| 00:15:17 | 31 | 31 |
| 3 | PARTITION LIST ALL | | 1 | 58 | 76394 (2)| 00:15:17 | 1 | 100 |
|* 4 | TABLE ACCESS FULL | SMS_DELIVERY_NODETAILS | 1 | 58 | 76394 (2)| 00:15:17 | 3001 | 3100 |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
4 - filter("TOOPERATOR"='2012-11-25' AND "CAMPAIGN_NAME"='1353814653772_ftp_Churnscore100_pe_100')
16 rows selected.Dear rp0428 ,
1. the table and index DDL
Table=>
Table_name Partition_name Subpartition_name
SMS_DELIVERY_NODETAILS TOOPERATOR TID_INDEX
Index=>
create local index DELIVERY_TID_MSISDN_NODETAILS on SMS_DELIVERY_NODETAILS(TRANSACTIONID,MSISDN);
create local index DELIVERY_CAMP on SMS_DELIVERY_NODETAILS(CAMPAIGN_NAME);2. the query you used to collect the table and index stats
SELECT count(*) from SMS_DELIVERY_NODETAILS WHERE TOOPERATOR='2012-11-25' and CAMPAIGN_NAME ='1353814653772_ftp_Churnscore100_pe_100'; 3. the table, partition,subpartition row counts
SQL> select PARTITION_POSITION,PARTITION_NAME,SUBPARTITION_COUNT,HIGH_VALUE from user_tab_partitions where TABLE_NAME='SMS_DELIVERY_NODETAILS' order by PARTITION_POSITION ;
PARTITION_POSITION PARTITION_NAME SUBPARTITION_COUNT HIGH_VALUE
1 PS_WD_10 100 '2012-10-28'
2 PS_WD_11 100 '2012-10-29'
3 PS_WD_12 100 '2012-10-30'
4 PS_WD_13 100 '2012-10-31'
5 PS_WD_14 100 '2012-11-01'
6 PS_WD_15 100 '2012-11-02'
7 PS_WD_16 100 '2012-11-03'
8 PS_WD_17 100 '2012-11-04'
9 PS_WD_18 100 '2012-11-05'
10 PS_WD_19 100 '2012-11-06'
11 PS_WD_20 100 '2012-11-07'
PARTITION_POSITION PARTITION_NAME SUBPARTITION_COUNT HIGH_VALUE
12 PS_WD_21 100 '2012-11-08'
13 PS_WD_22 100 '2012-11-09'
14 PS_WD_23 100 '2012-11-10'
15 PS_WD_24 100 '2012-11-11'
16 PS_WD_25 100 '2012-11-12'
17 PS_WD_26 100 '2012-11-13'
18 PS_WD_27 100 '2012-11-14'
19 PS_WD_28 100 '2012-11-15'
20 PS_WD_29 100 '2012-11-16'
21 PS_WD_30 100 '2012-11-17'
22 PS_WD_31 100 '2012-11-18'
PARTITION_POSITION PARTITION_NAME SUBPARTITION_COUNT HIGH_VALUE
23 PS_WD_32 100 '2012-11-19'
24 PS_WD_01 100 '2012-11-20'
25 PS_WD_02 100 '2012-11-21'
26 PS_WD_03 100 '2012-11-22'
27 PS_WD_04 100 '2012-11-23'
28 PS_WD_05 100 '2012-11-24'
29 PS_WD_06 100 '2012-11-25'
30 PS_WD_07 100 '2012-11-26'
31 PS_WD_08 100 '2012-11-27'
32 PS_WD_09 100 '2012-11-28'
33 PS_WD_DEFAULT 100 MAXVALUE
33 rows selected. -
Recovering deleted notes using Time Capsule
How do I find a deleted note from "Notes" using Time Machine back up?
See this thread: https://discussions.apple.com/thread/4179465
Looks like it's this folder:
~/Library/Containers/com.apple.Notes/Data/Library/CoreData/ExternalRecords
Maybe you are looking for
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