Index and template query

I am having a few problems i have my dreamweaver site created and i have used FTP to load my files up to my web host.....however when i go to my website i get the following in my browser http://www.matthewroe.co.uk . i get a strange index screen also through going through my files using the index in the browser i can get to my website pages...
however the only pages that dont seem to work are the .dwt template pages i created i just get a screen of code instead of my page. this can be seen by clicking on public_html - website - site - temp_site - home - projects - short animations - lamborghini - then click the small thumb nails on the left. (this step has to be done by going through the index on the browser.
Main qeustions i have are firstly how do i get my site to work correctly without arriving at an index page, and also how do i get my templates to display properly once clicked?
thanks very much for your time
Matt
http://www.matthewroe.co.uk

gigsywigsy wrote:
thanks for your reply,
i have created a site inside dreamweaver containing a local root folder etc, im just unsure about how the structure of the pages need to be loaded onto a web host, when i simulate my site inside dreamweaver it works fine,
If everything works locally, then you upload the files exactly as you have then structured in dreamweaver. Just select all the files on the local site and 'put' them on the the remote site..so that both structures are exactly the same
So if you ever need to move a file into another folder, do it within Dreamweaver and when you upload it, 'put' it into the corresponding folder on the remote site.
Also i didnt rename my index folder i had that named index already it was just inside another file called 'home' inside the structure of my site files, so i just uploaded straight from the 'home' folder
Ok, this was the big mistake and caused the linking errors. If you need to move any files, move them within dreamweave via the Files panel on the right. If you move or rename files or folders outside of dreamweaver then you end up with broken links as you have proven now by moving the index file outside of the home folder.
The only way to fix this now is to move the index file into the root of your Dreamweaver site. You will be asked to update any links. Say no for now because you're links are already broken. Open index.html file in DW and then re-create all your links. Now, make sure that any html page inside other folders have the correct link to the index page (they won't now because you moved it).
Now you have to upload the site back to the remote host, ensuring that you upload to the root as you have now. As long as all the other folders and files within them correspond to what you have in DW, then all your linking should work.
PS: I would remove (delete) all your files from the remote server when you are ready to upload the newly updated site.. keeps your server clean.
example of what I may have for a site in Dreamweaver - fairly simple, but just to give you an idea.....
Root of site:
index.html
aboutus.html
CSS folder
site.css
Images Folder
all imagesfor site in here
so when I upload all the above to my server, the structure is exactly the same. The index.html page always has to be in the root of this site, both locally and remotely, so that when you type in your domain name, the index.html page will load automatically without you having to type in www.example.com/index.html
Hope all that makes sense :-)

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How to make sql to use index/make to query to perform better

Hi,
I have 2 sql query which results the same.
But both has difference in SQL trace.
create table test_table
(u_id number(10),
u_no number(4),
s_id number(10),
s_no number(4),
o_id number(10),
o_no number(4),
constraint pk_test primary key(u_id, u_no));
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030301, 1, 1001, 1, 2001, 1);
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030302, 1, 1001, 1, 2001, 2);
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030303, 1, 1001, 1, 2001, 3);
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030304, 1, 1001, 1, 2001, 4);
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030305, 1, 1002, 1, 1001, 2);
insert into test_table(u_id, u_no, s_id, s_no, o_id, o_no)
values (2007030306, 1, 1002, 1, 1002, 1);
commit;
CREATE INDEX idx_test_s_id ON test_table(s_id, s_no);
set autotrace on
select s_id, s_no, o_id, o_no
from test_table
where s_id <> o_id
and s_no <> o_no
union all
select o_id, o_no, s_id, s_no
from test_table
where s_id <> o_id
and s_no <> o_no;
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=6 Card=8 Bytes=416)
1 0 UNION-ALL
2 1 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=4 Bytes=208)
3 1 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=4 Bytes=208)
Statistics
223 recursive calls
2 db block gets
84 consistent gets
0 physical reads
0 redo size
701 bytes sent via SQL*Net to client
508 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
5 sorts (memory)
0 sorts (disk)
8 rows processed
-- i didnt understand why the above query is not using the index idx_test_s_id.
-- But still it is faster
select s_id, s_no, o_id, o_no
from test_table
where (u_id, u_no) in
(select u_id, u_no from test_table
minus
select u_id, u_no from test_table
where s_id = o_id
or s_no = o_no)
union all
select o_id, o_no, s_id, s_no
from test_table
where (u_id, u_no) in
(select u_id, u_no from test_table
minus
select u_id, u_no from test_table
where s_id = o_id
or s_no = o_no);
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=16 Card=2 Bytes=156)
1 0 UNION-ALL
2 1 FILTER
3 2 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=6 Bytes=468)
4 2 MINUS
5 4 INDEX (UNIQUE SCAN) OF 'PK_TEST' (INDEX (UNIQUE)) (Cost=1 Card=1 Bytes=26)
6 4 TABLE ACCESS (BY INDEX ROWID) OF 'TEST_TABLE' (TABLE) (Cost=2 Card=1 Bytes=78)
7 6 INDEX (UNIQUE SCAN) OF 'PK_TEST' (INDEX (UNIQUE)) (Cost=1 Card=1)
8 1 FILTER
9 8 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=6 Bytes=468)
10 8 MINUS
11 10 INDEX (UNIQUE SCAN) OF 'PK_TEST' (INDEX (UNIQUE)) (Cost=1 Card=1 Bytes=26)
12 10 TABLE ACCESS (BY INDEX ROWID) OF 'TEST_TABLE' (TABLE) (Cost=2 Card=1 Bytes=78)
13 12 INDEX (UNIQUE SCAN) OF 'PK_TEST' (INDEX (UNIQUE)) (Cost=1 Card=1)
Statistics
53 recursive calls
8 db block gets
187 consistent gets
0 physical reads
0 redo size
701 bytes sent via SQL*Net to client
508 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
4 sorts (memory)
0 sorts (disk)
8 rows processed
-- The above query is using index PK_TEST. But still it has FULL SCAN to the
-- table two times it has the more cost.
1st query --> SELECT STATEMENT Optimizer=ALL_ROWS (Cost=6 Card=8 Bytes=416)
2nd query --> SELECT STATEMENT Optimizer=ALL_ROWS (Cost=16 Card=2 Bytes=156)
My queries are:
1) performance wise which query is better?
2) how do i make the 1st query to use an index
3) is there any other method to get the same result by using any index
Appreciate your immediate help.
Best regards
Muthu

Hi William
Nice...it works.. I have added "o_id" and "o_no" are in part of the index
and now the query uses the index
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=2 Card=8 Bytes=416)
1 0 UNION-ALL
2 1 INDEX (FULL SCAN) OF 'IDX_TEST_S_ID' (INDEX) (Cost=1 Card=4 Bytes=208)
3 1 INDEX (FULL SCAN) OF 'IDX_TEST_S_ID' (INDEX) (Cost=1 Card=4 Bytes=208)
Statistics
7 recursive calls
0 db block gets
21 consistent gets
0 physical reads
0 redo size
701 bytes sent via SQL*Net to client
507 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
8 rows processed
But my questions are:
1) In a where clause, if "<>" condition is used, then, whether the system will use the index. Because I have observed in several situations even though the column in where clause is indexed, since the where condition is "like" or "is null/is not null"
then the index is not used. Same as like this, i assumed, if we use <> then indexes will not be used. Is it true?
2) Now, after adding "o_id" and "o_no" columns to the index, the Execution plan is:
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=2 Card=8 Bytes=416)
1 0 UNION-ALL
2 1 INDEX (FULL SCAN) OF 'IDX_TEST_S_ID' (INDEX) (Cost=1 Card=4 Bytes=208)
3 1 INDEX (FULL SCAN) OF 'IDX_TEST_S_ID' (INDEX) (Cost=1 Card=4 Bytes=208)
Before it was :
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=6 Card=8 Bytes=416)
1 0 UNION-ALL
2 1 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=4 Bytes=208)
3 1 TABLE ACCESS (FULL) OF 'TEST_TABLE' (TABLE) (Cost=3 Card=4 Bytes=208)
Difference only in Cost (reduced), not in Card, Bytes.
Can you explain, how can i decide which makes the performace better (Cost / Card / Bytes). Full Scan / Range Scan?
On statistics also:
Before:
Statistics
52 recursive calls
0 db block gets
43 consistent gets
0 physical reads
0 redo size
701 bytes sent via SQL*Net to client
507 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
8 rows processed
After:
Statistics
7 recursive calls
0 db block gets
21 consistent gets
0 physical reads
0 redo size
701 bytes sent via SQL*Net to client
507 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
8 rows processed
Difference in recursive calls & consistent gets.
Which one shows the query with better performance?
Please explain..
Regards
Muthu

Script to find duplicate index and how can we tell if an index is REALLY a duplicate?

Does any one have script to find duplicate index? and how can we tell if an index is REALLY a duplicate?
Rahul

One more written by Itzik Ben-Gan
The first query finds exact matches. The indexes must have
the same key columns in the same order, and the same included columns but in any order.
These indexes are sure targets for elimination. The only caution would be to check for index hints.
-- exact duplicates
with indexcols as
select object_id as id, index_id as indid, name,
(select case keyno when 0 then NULL else colid end as [data()]
from sys.sysindexkeys as k
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order by keyno, colid
for xml path('')) as cols,
(select case keyno when 0 then colid else NULL end as [data()]
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where k.id = i.object_id
and k.indid = i.index_id
order by colid
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from sys.indexes as i
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c1.name as 'index',
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and c1.indid < c2.indid
and c1.cols = c2.cols
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The second variation of this query finds partial, or duplicate, indexes
that share leading key columns, e.g. Ix1(col1, col2, col3) and Ix2(col1, col2)
would be considered duplicate indexes. This query only examines key columns and does not consider included columns.
These types of indexes are probable dead indexes walking.
-- Overlapping indxes
with indexcols as
select object_id as id, index_id as indid, name,
(select case keyno when 0 then NULL else colid end as [data()]
from sys.sysindexkeys as k
where k.id = i.object_id
and k.indid = i.index_id
order by keyno, colid
for xml path('')) as cols
from sys.indexes as i
select
object_schema_name(c1.id) + '.' + object_name(c1.id) as 'table',
c1.name as 'index',
c2.name as 'partialduplicate'
from indexcols as c1
join indexcols as c2
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and (c1.cols like c2.cols + '%'
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Be careful when dropping a partial duplicate index if the two indexes differ greatly in width.
For example, if Ix1 is a very wide index with 12 columns, and Ix2 is a narrow two-column index
that shares the first two columns, you may want to leave Ix2 as a faster, tighter, narrower index.
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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Indexing and Deadlock in SQL Server 2008?

All,
I am running into a deadlock in SQL Server 2008. Using a profiler I was able to determine that the deadlock happens as I am trying to select and update row(S) in table in 2 different sessions.
The select query from the profiler is shown below
select
nodeinstan0_.id as id35_,
nodeinstan0_.BPMN_ELEMENT_ID as BPMN2_35_,
nodeinstan0_.END_DATE as END3_35_,
nodeinstan0_.NODE_ID as NODE4_35_,
nodeinstan0_.NODE_INSTANCE_ID as NODE5_35_,
nodeinstan0_.NODE_NAME as NODE6_35_,
nodeinstan0_.PROCESS_INSTANCE_ID as PROCESS7_35_,
nodeinstan0_.START_DATE as START8_35_
from
NODE_INSTANCE_LOG nodeinstan0_ where
nodeinstan0_.NODE_INSTANCE_ID= @P0 and
nodeinstan0_.PROCESS_INSTANCE_ID= @P1 and
(nodeinstan0_.END_DATE is null)
My SQL Scripts for creating the table and index is show below
CREATE TABLE [dbo].[NODE_INSTANCE_LOG](
[id] [numeric](19, 0) IDENTITY(1,1) NOT NULL,
[BPMN_ELEMENT_ID] [varchar](255) NULL,
[END_DATE] [datetime] NULL,
[NODE_ID] [varchar](255) NOT NULL,
[NODE_INSTANCE_ID] [varchar](255) NOT NULL,
[NODE_NAME] [varchar](2000) NULL,
[PROCESS_INSTANCE_ID] [numeric](19, 0) NOT NULL,
[START_DATE] [datetime] NULL,
PRIMARY KEY CLUSTERED
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,
IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
CREATE NONCLUSTERED INDEX IX_NODE_INSTANCE_LOG_Index1
ON NODE_INSTANCE_LOG(NODE_INSTANCE_ID, PROCESS_INSTANCE_ID, END_DATE)
INCLUDE
( ID, BPMN_ELEMENT_ID, NODE_ID, NODE_NAME, START_DATE);
As I understood from number of other forums and blogs - I have included the columns under the where clause in the "COVERING index" and the rest of the columns from the select query under non clustered Index. But I am still facing a deadlock.
Would appreciate if some once can point me in the right direction.
regards D

Correction to my earlier observation. Its not a select/update that's causing the deadlock but its a select/select
I am pasting an extract from the Tracer
<deadlock victim="process6a9048">
<process-list>
<process id="process6a9048" taskpriority="0" logused="15888" waitresource="KEY: 6:72057594142588928 (fbd2e857cffa)" waittime="812" ownerId="1927048" transactionname="implicit_transaction" lasttranstarted="2014-01-03T17:01:35.453" XDES="0x91cd7960" lockMode="S" schedulerid="2" kpid="3640" status="suspended" spid="56" sbid="0" ecid="0" priority="0" trancount="1" lastbatchstarted="2014-01-03T17:01:35.723" lastbatchcompleted="2014-01-03T17:01:35.723" clientapp="jTDS" hostname="LDN-LRM-PC-189" hostpid="123" loginname="username" isolationlevel="read committed (2)" xactid="1927048" currentdb="6" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128058">
<executionStack>
<frame procname="adhoc" line="1" stmtstart="62" sqlhandle="0x02000000e82b4000ebf38fb66978d5f9f2314a6046f957b3">
select nodeinstan0_.id as id35_, nodeinstan0_.BPMN_ELEMENT_ID as BPMN2_35_, nodeinstan0_.END_DATE as END3_35_, nodeinstan0_.NODE_ID as NODE4_35_, nodeinstan0_.NODE_INSTANCE_ID as NODE5_35_, nodeinstan0_.NODE_NAME as NODE6_35_, nodeinstan0_.PROCESS_INSTANCE_ID as PROCESS7_35_, nodeinstan0_.START_DATE as START8_35_ from NODE_INSTANCE_LOG nodeinstan0_ where nodeinstan0_.NODE_INSTANCE_ID= @P0 and nodeinstan0_.PROCESS_INSTANCE_ID= @P1 and (nodeinstan0_.END_DATE is null) </frame>
</executionStack>
<inputbuf>
(@P0 nvarchar(4000),@P1 bigint)select nodeinstan0_.id as id35_, nodeinstan0_.BPMN_ELEMENT_ID as BPMN2_35_, nodeinstan0_.END_DATE as END3_35_, nodeinstan0_.NODE_ID as NODE4_35_, nodeinstan0_.NODE_INSTANCE_ID as NODE5_35_, nodeinstan0_.NODE_NAME as NODE6_35_, nodeinstan0_.PROCESS_INSTANCE_ID as PROCESS7_35_, nodeinstan0_.START_DATE as START8_35_ from NODE_INSTANCE_LOG nodeinstan0_ where nodeinstan0_.NODE_INSTANCE_ID= @P0 and nodeinstan0_.PROCESS_INSTANCE_ID= @P1 and (nodeinstan0_.END_DATE is null) </inputbuf>
</process>
<process id="process6dddc8" taskpriority="0" logused="114316" waitresource="KEY: 6:72057594142588928 (44ec7e8e62c7)" waittime="602" ownerId="1927022" transactionname="implicit_transaction" lasttranstarted="2014-01-03T17:01:35.227" XDES="0x91d25950" lockMode="S" schedulerid="4" kpid="17412" status="suspended" spid="60" sbid="0" ecid="0" priority="0" trancount="1" lastbatchstarted="2014-01-03T17:01:35.937" lastbatchcompleted="2014-01-03T17:01:35.937" clientapp="jTDS" hostname="LDN-LRM-PC-189" hostpid="123" loginname="username" isolationlevel="read committed (2)" xactid="1927022" currentdb="6" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128058">
<executionStack>
<frame procname="adhoc" line="1" stmtstart="62" sqlhandle="0x02000000e82b4000ebf38fb66978d5f9f2314a6046f957b3">
select nodeinstan0_.id as id35_, nodeinstan0_.BPMN_ELEMENT_ID as BPMN2_35_, nodeinstan0_.END_DATE as END3_35_, nodeinstan0_.NODE_ID as NODE4_35_, nodeinstan0_.NODE_INSTANCE_ID as NODE5_35_, nodeinstan0_.NODE_NAME as NODE6_35_, nodeinstan0_.PROCESS_INSTANCE_ID as PROCESS7_35_, nodeinstan0_.START_DATE as START8_35_ from NODE_INSTANCE_LOG nodeinstan0_ where nodeinstan0_.NODE_INSTANCE_ID= @P0 and nodeinstan0_.PROCESS_INSTANCE_ID= @P1 and (nodeinstan0_.END_DATE is null) </frame>
</executionStack>
<inputbuf>
(@P0 nvarchar(4000),@P1 bigint)select nodeinstan0_.id as id35_, nodeinstan0_.BPMN_ELEMENT_ID as BPMN2_35_, nodeinstan0_.END_DATE as END3_35_, nodeinstan0_.NODE_ID as NODE4_35_, nodeinstan0_.NODE_INSTANCE_ID as NODE5_35_, nodeinstan0_.NODE_NAME as NODE6_35_, nodeinstan0_.PROCESS_INSTANCE_ID as PROCESS7_35_, nodeinstan0_.START_DATE as START8_35_ from NODE_INSTANCE_LOG nodeinstan0_ where nodeinstan0_.NODE_INSTANCE_ID= @P0 and nodeinstan0_.PROCESS_INSTANCE_ID= @P1 and (nodeinstan0_.END_DATE is null) </inputbuf>
</process>
</process-list>
<resource-list>
<keylock hobtid="72057594142588928" dbid="6" objectname="reform.dbo.NODE_INSTANCE_LOG" indexname="IX_NODE_INSTANCE_LOG_Index1" id="lock89f43000" mode="X" associatedObjectId="72057594142588928">
<owner-list>
<owner id="process6dddc8" mode="X"/>
</owner-list>
<waiter-list>
<waiter id="process6a9048" mode="S" requestType="wait"/>
</waiter-list>
</keylock>
<keylock hobtid="72057594142588928" dbid="6" objectname="reform.dbo.NODE_INSTANCE_LOG" indexname="IX_NODE_INSTANCE_LOG_Index1" id="lock81b22a80" mode="X" associatedObjectId="72057594142588928">
<owner-list>
<owner id="process6a9048" mode="X"/>
</owner-list>
<waiter-list>
<waiter id="process6dddc8" mode="S" requestType="wait"/>
</waiter-list>
</keylock>
</resource-list>
</deadlock>
Would appreciate if some one can point out where the issue is.

Use of Indexes in select query

Hello,
This is on a 9i install.
There is an index called form_id_idx on the form_id column.
Why does this query use the index (autotrace indicates range scan on the index):
select count(*) from table_name where form_id=123456;
but this query does NOT use the index (autotrace indicates full table scan):
select accepted from table_name where form_id=123456;
This second query runs much faster when I use a hint on the index. Any help/suggestions?
Thanks.

The first query does NOT have to go to the Table it all. It can read the index to count the number of rows for "form_id=123456". An Index Range Scan would be fast.
The second query has to go to the table to get the values for the "accepted" column for all the rows that have "form_id=123456". Remember that every get can require a read of 2 or more blocks -- at least one, probably 2 or 3, from the index and 1 from the table. If the number of rows is likely to be large then the number of block get operations would be high. In such cases, Oracle computes that it is faster to do a small set of multiblock reads to read the whole table (Table FullScan).
Therefore, the optimzer weighs :
a. how many rows it thinks will satisfy "form_id=123456"
b. how many index + table block gets it would have to execute (all as single block read calls to the OS)
versus
x. how many multiblock read calls it thinks it has to execute to read the whole table
If the available statistics on number of rows, cardinality or density and the size of the table indicate that operation "x" would be cheaper then operations "a" + "b", Oracle would prefer the latter.
Hemant K Chitale
http://hemantoracledba.blogspot.com

Function-based Index and an OR-condition in the WHERE-clause

We have some problems with functin-based indexes and
the or-condition in a where-clause.
(We use oracle 8i (8.1.7))
create table TPERSON(ID number(10),NAME varchar2(20),...);
create index I_NORMAL_TPERSON_NAME on TPERSON(NAME);
create index I_FUNCTION_TPERSON_NAME on TPERSON(UPPER(NAME));
The following two statements run very fast on a large table
and the execution-plan asure the usage of the indexes
(-while the session is appropriate configured and the table is analyzed):
1)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%';
2)     select count(ID) from TPERSON where NAME like 'Mil%' or (3=5);
In particular we see that a normal index is used while the where-clause contains
an OR-CONDITION.
But if we try the similarly select-statement
3)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%' or (3=5);
the CBO will not use the function-index.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like an hint, which enable the CBO-usage
of function-based indexes in connection with OR.
This problem seems to be artificial because it contains this dummy logic:
     or (3=5).
This steams from an prepared statement, where this kind of boolean
flag reduce the amount of different select-statements needed for
covering the hole business-logic, while using bind-variables for the
concrete query-parameters.
A more realistic (still boild down) version of our prepared select-statement run in
SQL Plus:
define x_name = 'MIL%';
define x_firstname = '';
select * FROM TPERSON
where (upper(NAME) like '&x_name' or ( '&x_name' = ''))
and (upper(FIRSTNAME) like '&x_firstname' or ('&x_firstname' = ''))
and ...;
In particular we dont refernce the tablecolumn , but the QUERY-Parameter
yield the second boolean value in the or-condition.
The problem is that this condition ('&x_name' = '') dont use any index.
thanks a lot for spending your time with this problem

Try
SELECT /*+ RULE */
as your hint. I don't have the book with me, but this last weekend I read a section about your very problem. The book was a Oracle Press gold cover about Oracle 8i Performance tuning. If you e-mail me I can quote you the chapter when I get home Friday.

Question about composite index and index skip scan

Hi,
I have a confusion.
I have read Burleson's post on composite index column ordering (http://www.dba-oracle.com/t_composite_index_multi_column_ordering.htm) where he writes that
"......for composite indexes the most restrictive column value(the column with the highest unique values) should be put first to trim down the result set..."
But 10g performance tuning book tells this about INDEX SKIP SCAN ::
"... Index Skip scanning lets a composite index be split logically into smaller subindexes. In skip
scanning, the initial column of the composite index is not specified in the query. In other words, it is skipped.
The number of logical subindexes is determined by the number of distinct values in the initial column.
Skip scanning is advantageous if there are few distinct values in the leading column of the composite index and many distinct values in the non-leading key of the index......."
So if we design Composite indexes acc. to what Burleson said then how can we take advantage of index skip scanning. These two staements oppose each other,don't they ?
Can anybody explain this ?

Dear,
For the moment forget the distinct values and the compressibility. I've tried to reproduce your case here below (using jonathan lewis table script)
create table t1
as
with generator as (
    select    --+ materialize
        rownum id
    from dual
    connect by
        rownum <= 10000
select
    rownum              c1,
    mod(rownum,1000)    c2,
    mod(rownum,5000)    c3,
    mod(rownum,10000)   c4,
    lpad(rownum,10,'0') c5,
    rpad('x',5)         c6
from
    generator    v1,
    generator    v2
where
    rownum <= 1000
alter table t1 add constraint t1_pk primary key (c3,c4,c5,C6);
create index idx_1 on t1 (c1,c2);
begin
     dbms_stats.gather_table_stats(
          ownname           => user,
          tabname           =>'T1',
          estimate_percent => 100,
          method_opt       => 'for all columns size 1'
end;
/and here are what I got with your two selects
mho.sql>> SELECT c1,c2
2 FROM t1
3 WHERE c2 = 3;
        C1         C2
         3          3
Elapsed: 00:00:00.00
mho.sql>> start dispcursor
PLAN_TABLE_OUTPUT
SQL_ID 4dbgq3m2utd9f, child number 0
SELECT c1,c2 FROM t1 WHERE c2 = 3
Plan hash value: 3723378319
| Id | Operation            | Name | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
|* 1 | INDEX FAST FULL SCAN| IDX_1 |      1 |      1 |      1 |00:00:00.01 |       7 |
Predicate Information (identified by operation id):
   1 - filter("C2"=3)
17 rows selected.
Elapsed: 00:00:00.34
mho.sql>> SELECT c3,c4,c5,c6
2 FROM t1
3 WHERE c4 = 3
4 AND c5 = '0000000003'
5 AND c6 = 'x    ';
        C3         C4 C5         C6
         3          3 0000000003 x
Elapsed: 00:00:00.00
mho.sql>> @dispcursor
PLAN_TABLE_OUTPUT
SQL_ID fv62c9uqtktw9, child number 0
SELECT c3,c4,c5,c6 FROM t1 WHERE c4 = 3 AND c5 = '0000000003' AND c6 = 'x    '
Plan hash value: 2969533764
| Id | Operation            | Name | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
|* 1 | INDEX FAST FULL SCAN| T1_PK |      1 |      1 |      1 |00:00:00.01 |       9 |
Predicate Information (identified by operation id):
   1 - filter(("C4"=3 AND "C5"='0000000003' AND "C6"='x    '))
17 rows selected.I didn't succeed to reproduce your index skip scan situation.
Best Regards
Mohamed Houri

Verity - files and db query combo

Is it possible to have both a search of some files and a
query of a database table in the same cfcollection? If so, guidance
on how to do this?

I'm not sure if this answers your question, but it's possible
to combine database and files while indexing.

Combined flat (regular) and Spatial query

DB: Oracle 8.1.7.2.1 (8i Release 3, patch 81721)
I performed a spatial query on the results of a regular query, in the form of:
Select count(*) from
(select * from myTable where key=...)
WHERE (MDSYS.SDO_RELATE("GEOLOC",
MDSYS.SDO_GEOMETRY(2003,NULL,null,
MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),
MDSYS.SDO_ORDINATE_ARRAY(-118.83939716391866,
29.951783100000025, -100.20650379608135,
40.52319191999998)),
'mask=ANYINTERACT layer_gtype=POINT
querytype = WINDOW')='TRUE');
The first flat query results in a small number of records and takes minimum time if run separately.
Select count(*) from
(select * from myTable where key=...)
However, when appended the spatial join condition, it takes a long time, same as querying from the whole dataset without the first flat query. I tried to optimize the spatial index and it did not help much.
Why isn't the spatial query taking advantage of the flat query? Can I somehow force it to do so to improve the performance? (This is a dynamic query in an application.)
Thanks.

Hi
I have a similar problem and i'd like to know if anyone have got a solution.
We are developing a vehicle localization system.
The amount of data it's about 6 million positions per year.
The queries to the data could be the actual location of the vehicle (100 vehicles) or historical locations.
For historical location we have partitioned the table an index by date (each week), and for actual location we have created a bitmap index based on field L_ULTIMA.
Allwais the queries are filtered by alfanumeric conditions more restrictive then spatial (range of dates or last_location).
When runnin alfanumeric queries over a subset of une million rows, it takes only few seconds (even less) but when including spatial conditions (SDO_RELATE to a rectangle) it takes more than one minute.
We have tried different hints to force the use of bitmap index but in all cases the execution plan uses de spatial index.
It's there any way to combine spatial and flat indexes?
SELECT
COUNT(*)
FROM SLFP_LOCALIZACIONES A
WHERE sdo_relate(A.geom, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,3),
mdsys.sdo_ordinate_array(159657,3978069, 546051,4116358)),
'mask=anyinteract querytype=window') = 'TRUE';
COUNT(*)
899073
Transcurrido: 00:02:126.34
SELECT /*+ INDEX_COMBINE(A SLFP_LOCALI_ULTIMA_I) */
COUNT(*)
FROM SLFP_LOCALIZACIONES A
WHERE sdo_relate(A.geom, mdsys.sdo_geometry(2003,NULL,NULL,
mdsys.sdo_elem_info_array(1,1003,3),
mdsys.sdo_ordinate_array(159657,3978069, 546051,4116358)),
'mask=anyinteract querytype=window') = 'TRUE' AND
A.L_ULTIMA = 1;
COUNT(*)
102
Transcurrido: 00:02:121.00
SELECT COUNT(*) FROM SLFP_LOCALIZACIONES WHERE L_ULTIMA = 1
COUNT(*)
104
Transcurrido: 00:00:00.72
SQL> SELECT /*+ INDEX_COMBINE(A SLFP_LOCALI_ULTIMA_I) */
2 COUNT(*)
3 FROM SLFP_LOCALIZACIONES A
4 WHERE N_X >= 159657 AND
5 N_X <= 546051 AND
6 N_Y >= 3978069 AND
7 N_Y <= 4116358 AND
8 A.L_ULTIMA = 1;
COUNT(*)
102
Transcurrido: 00:00:00.59

Using index in a query return few records than full table access

Today we have an issue with a query, when it use the ok index the returned are not all records that apply to where clause condition.
See bellow
explain plan for
select * from movdb.zan_m03 where
M00AF = TO_DATE('11/01/28','YY/MM/DD') AND
M00za = 10 AND
m00AC = 50 AND
M00AD between 136906 and 136999
SELECT * FROM TABLE(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 1882720105
| Id | Operation | Name |
| 0 | SELECT STATEMENT | |
| 1 | TABLE ACCESS BY INDEX ROWID| ZAN_M03 |
|* 2 | INDEX RANGE SCAN | PK_ZAN_M03 |
Predicate Information (identified by operation id):
PLAN_TABLE_OUTPUT
2 - access("M00AF"=TO_DATE('11/01/28','YY/MM/DD') AND "M00ZA"=10 AND
"M00AC"=50 AND "M00AD">=136906 AND "M00AD"<=137141)
filter("M00AD"<=137141 AND "M00AD">=136906)
Note
- rule based optimizer used (consider using cbo)
20 rows selected.
The query above return only one row insted 1579 record that apply to this conditions.
When forcing a full table acess with a hint, the query return all records that apply, the 1579 record.
select /*+ FULL(zan_m03) */ M00AF, M00za, m00AC , M00AD from movdb.zan_m03 where
M00AF = TO_DATE('11/01/28','YY/MM/DD') AND
M00za = 10 AND
m00AC = 50 AND
M00AD between 136906 and 137141
Can you help me to identify what's happening?
I am with Oracle 10g R2 10.2.0.4 standard edition
the statistics are up to date
the opitimizer_mode are rule, but altering in session level to all_rows happens the same issue.
Nothing about corruption in the alert log.
Thanks in advance
Regards
Cristiano

Yes the query are the same and correct restriction for where clause are M00AD between 136906 and 137141.
I've pasted, by mistake, another test query
The corrects are:
select M00AF, M00za, m00AC , M00AD from movdb.zan_m03 where
M00AF = TO_DATE('11/01/28','YY/MM/DD') AND
M00za = 10 AND
m00AC = 50 AND
M00AD between 136906 and 137141
This use pk index and return one row
select /*+ FULL(zan_m03) */ M00AF, M00za, m00AC , M00AD from movdb.zan_m03 where
M00AF = TO_DATE('11/01/28','YY/MM/DD') AND
M00za = 10 AND
m00AC = 50 AND
M00AD between 136906 and 137141
This does a full table access and return 1579 records
I´ve been searching for wrong results bugs on my oracle support, but not found one that mentions something like our issue.
I checked the dba_tables and dba indexes and the number of rows are different, and I think this would be the same because it's is a pk.
Look this
SQL> select NUM_ROWS from dba_tables where table_name = 'ZAN_M03'
2 /
NUM_ROWS
228527878
select NUM_ROWS from dba_indexes where index_name = 'PK_ZAN_M03';
SQL> select NUM_ROWS from dba_indexes where index_name = 'PK_ZAN_M03';
NUM_ROWS
217510185
Is normal a index for pk having much fewer rows than table? I think not, but not sure.
Again
Thanks in advance
Regards
Cristiano

ORA-01502 error in case of unusable unique index and bulk dml

Hi, all.
The db is 11.2.0.3 on a linux machine.
I made a unique index unusable, and issued a dml on the table.
Howerver, oracle gave me ORA-01502 error.
In order to avoid ORA-01502 error, do I have to drop the unique index ,and do bulk dml, and recreate the index?
Or Is there any other solution without re-creating the unique index?
create table hoho.abcde as
select level col1 from dual connect by level <=1000
10:09:55 HOHO@PD1MGD>create unique index hoho.abcde_dx1 on hoho.abcde (col1);
Index created.
10:10:23 HOHO@PD1MGD>alter index hoho.abcde_dx1 unusable;
Index altered.
Elapsed: 00:00:00.03
10:11:27 HOHO@PD1MGD>delete from hoho.abcde where rownum < 11;
delete from hoho.abcde where rownum < 11
ERROR at line 1:
ORA-01502: index 'HOHO.ABCDE_DX1' or partition of such index is in unusable stateThanks in advance.
Best Regards.

Hi. all.
The following is from "http://docs.oracle.com/cd/E14072_01/server.112/e10595/indexes002.htm#CIHJIDJG".
Is there anyone who can show me a tip to avoid the following without dropping and re-creating an unique index?
•DML statements terminate with an error if there are any unusable indexes that are used to enforce the UNIQUE constraint.
Unusable indexes
An unusable index is ignored by the optimizer and is not maintained by DML. One reason to make an index unusable is if you want to improve the performance of bulk loads. (Bulk loads go more quickly if the database does not need to maintain indexes when inserting rows.) Instead of dropping the index and later recreating it, which requires you to recall the exact parameters of the CREATE INDEX statement, you can make the index unusable, and then just rebuild it. You can create an index in the unusable state, or you can mark an existing index or index partition unusable. The database may mark an index unusable under certain circumstances, such as when there is a failure while building the index. When one partition of a partitioned index is marked unusable, the other partitions of the index remain valid.
An unusable index or index partition must be rebuilt, or dropped and re-created, before it can be used. Truncating a table makes an unusable index valid.
Beginning with Oracle Database 11g Release 2, when you make an existing index unusable, its index segment is dropped.
The functionality of unusable indexes depends on the setting of the SKIP_UNUSABLE_INDEXES initialization parameter.
When SKIP_UNUSABLE_INDEXES is TRUE (the default), then:
•DML statements against the table proceed, but unusable indexes are not maintained.
•DML statements terminate with an error if there are any unusable indexes that are used to enforce the UNIQUE constraint.
•For non-partitioned indexes, the optimizer does not consider any unusable indexes when creating an access plan for SELECT statements. The only exception is when an index is explicitly specified with the INDEX() hint.
•For a partitioned index where one or more of the partitions are unusable, the optimizer does not consider the index if it cannot determine at query compilation time if any of the index partitions can be pruned. This is true for both partitioned and non-partitioned tables. The only exception is when an index is explicitly specified with the INDEX() hint.
When SKIP_UNUSABLE_INDEXES is FALSE, then:
•If any unusable indexes or index partitions are present, any DML statements that would cause those indexes or index partitions to be updated are terminated with an error.
•For SELECT statements, if an unusable index or unusable index partition is present but the optimizer does not choose to use it for the access plan, the statement proceeds. However, if the optimizer does choose to use the unusable index or unusable index partition, the statement terminates with an error.Thanks in advance.
Best Regards.

Activity Journal - Creation of template type and template

Hello Experts,
we need to create a template type and template because we can not use the standard template to see product information in the Activity Journal.
Where in Customizing can i define template type and template and which are the steps to do it. For our activity journal we need to see only the fields:
1. Product ID
2. Product
3. Notes
The rest of the information is not necesary. The SAP Note 1261860 describes exactly the problem we have but we are not able to generate template and template type.
Best Regards
Oliver Schultze

Hi there
For generation of template for Activity so that you can see the Product info,u just need to generate the Index in SPRO
Go to IMG and there within the transaction types you can locate the index i am speaking about to generate.
Here is the path-->IMG->CRM--->Transaction ->Basic Settings->Settings for Activites->Activity Journal--->Activity Standard Template Type
Here you give your desired language in which you want your template to be created.
As soon as you genarte that you will be having product info on your Activity screen
See this arrangement is client specific only so if you are say in sandbox or dev or qual or prod.u need to do this setting seperately in each client.
Hope you got what i said.
Cheers
Ashish

Index and template query

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