Newbie: dropping and creating an identical user
Oracle 10g
Hi: I need to drop and recreate the user. This is what I had from my previous notes.
1. how do I figure out what is the current default tablespace
2. how do I figure out the current temporary tablespace?
3. the table space and temporary table space get deleted when I drop the user. if Yes, Is it possible some other user's default tablespace and temporary tablespace is the same as well.
Drop user systems cascade;
CREATE USER SYSTEMS
IDENTIFIED BY VALUES 'Test123'
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMPts1
PROFILE DEFAULT
ACCOUNT UNLOCK;
/
When I do a "SELECT DBMS_METADATA.GET_DDL('USER', 'Test123') || '/' DDL FROM DBA_USERS;", I get 34 rows. What does that mean. They all look identical.
SELECT DBMS_METADATA.GET_DDL('USER', 'Test123') || '/' DDL FROM DBA_USERS;
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
CREATE USER "Test123" IDENTIFIED BY VALUES 'F42EB0B11017F065'
DEFAULT TABLESPACE "ARSYSTEM"
TEMPORARY TABLESPACE "TEMP"
34 rows selected.
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Performance issue with drop and re-create index
My database table has about 2 million records. The index in the table was not optmized, so we created a new index lets call it index2. So this table now was the original index (index1) and the index2. We then inserted data into this table from the other box. It was running for a few weeks.
Suddenly we noticed that a query which used to take a few seconds now took more than a minute. The execution plan was using the index2 which technically should be faster. We checked if the statistics were upto date and it was. So then we dropped the new index, re-ran the query and it completed in 10 sec's. It was usign the old index. This puzzled me since the point of the index2 was to make it better. So then we re-created index2 and genrated stats for the index. Re-ran the query and it completed in 5 sec's.
Everytime we timed to run the query, I shutdown and restarted the box to clear all cache's. So all the time I have specified are pure time's and not cached. The execution plan using index2 taking 1 min and 5 sec's are nearly the same, with very minior difference in cost and cardnitality. Any ideas why index2 took 1 min before and after drop and create again takes only 5 sec.
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3/31
Original
Elapsed: 00:01:02.17
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6553 Card=9240 Bytes
=203280)
1 0 SORT (UNIQUE) (Cost=6553 Card=9240 Bytes=203280)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
UE) (Cost=15982 Card=2306303 Bytes=50738666)
drop index EVENT_NA_TIME_ETYPE
Elapsed: 00:00:11.91
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=7792 Card=9275 Bytes
=204050)
1 0 SORT (UNIQUE) (Cost=7792 Card=9275 Bytes=204050)
2 1 TABLE ACCESS (BY INDEX ROWID) OF 'EVENT' (Cost=2092
Card=2284254 Bytes=50253588)
3 2 INDEX (RANGE SCAN) OF 'EVENT_TIME_NDX' (NON-UNIQUE
) (Cost=6740 Card=2284254)
create index EVENT_NA_TIME_ETYPE ON EVENT(NET_ADDRESS,TIME,EVENT_TYPE);
BEGIN
SYS.DBMS_STATS.GENERATE_STATS('USER','EVENT_NA_TIME_ETYPE',0);
end;
Elapsed: 00:00:05.14
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6345 Card=9275 Bytes
=204050)
1 0 SORT (UNIQUE) (Cost=6345 Card=9275 Bytes=204050)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
UE) (Cost=12878 Card=2284254 Bytes=50253588)
4/3
Elapsed: 00:00:09.70
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6596 Card=9316 Bytes
=204952)
1 0 SORT (UNIQUE) (Cost=6596 Card=9316 Bytes=204952)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
UE) (Cost=11696 Card=2409400 Bytes=53006800)
Statistics
0 recursive calls
0 db block gets
11933 consistent gets
9676 physical reads
724 redo size
467 bytes sent via SQL*Net to client
503 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
3 rows processed
4/4
Elapsed: 00:00:17.99
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=6681 Card=9421 Bytes
=207262)
1 0 SORT (UNIQUE) (Cost=6681 Card=9421 Bytes=207262)
2 1 INDEX (FULL SCAN) OF 'EVENT_NA_TIME_ETYPE' (NON-UNIQ
UE) (Cost=12110 Card=2433800 Bytes=53543600)
Statistics
0 recursive calls
0 db block gets
12279 consistent gets
9423 physical reads
2608 redo size
467 bytes sent via SQL*Net to client
503 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
3 rows processed
SQL> select index_name,clustering_factor,blevel,leaf_blocks,distinct_keys from u ser_indexes where index_name like 'EVENT%';
INDEX_NAME CLUSTERING_FACTOR BLEVEL LEAF_BLOCKS DISTINCT_KEYS
EVENT_NA_TIME_ETYPE 2393170 2 12108 2395545
EVENT_PK 32640 2 5313 2286158
EVENT_TIME_NDX 35673 2 7075 2394055 -
Hi,
If we drop and recreate the oracle user in production database, what advantages we will get?
Any one help me...
DB Version:10.2.04
OS: HP-UX
Thanks,
Srini ...935930 wrote:
Hi,
If we drop and recreate the oracle user in production database, what advantages we will get?
Any one help me...
DB Version:10.2.04
OS: HP-UX
Thanks,
Srini ...The "advantage" (or "disadvantage") would depend on what you are trying to accomplish, correct? -
Drop and recreate table in stored procedure
Hi all
When creating tables using Transact-SQL scripts, I have always preferred to drop the table if it exists and then create it explicitly using CREATE TABLE. For two reasons:
1) It does not matter if it is the first time the SP is run ie. if I create the table manually in the first instance and just use TRUNCATE TABLE it could fail if the table is deleted
2) I have control over the data types of the table fields
Just recently though I discovered the error that can occur when dropping and creating a table in the same batch (see link below)
Microsoft Website
This causes me a problem when dropping and creating tables in stored procedures, as I understand that a stored procedure is in itself a single batch?
Can I avoid this error in a stored procedure whilst continuing to drop and create tables? Or should I be taking a different approach?
Coding best practice advice would be greatly appreciated.
Thank youThanks Ronen
Please see my second post immediately before your reply.
Given that I need to store the data output in a physical table for use in QlikView, would you suggest truncating the table each time the SP runs? And then having a script that handles both dropping and creating the physical table, and also creating
the SP?
>> QlikView
QlikView is an Israeli company, right?
In any case I am not familiar with QlikView's application, therefore I can only give you general information, based on assumptions regarding the application, and facts regarding the SQL Server.
>> for use in QlikView
I assume that external application use specific database structure (table
structure) and it is change only in rare situations (for example CMS interface might change the tables if and when a module s update/install). In this case there is no need to drop the table and recreate it and TRUNCATE is the solution.
>> would you suggest truncating the table each time the SP runs
I am sorry but i cant recommend on TRUNCATE a table each time you execute SP, without know the exact reason for this logic. It sound to me, at this point of time (with the information that we have), that this
is very bad logic (application architecture). As I wrote above, basing your application on TRUNCATING the table each time mean that you have problems with multi users. Thins about 2 people that try to execute the same SP at almost the same time. Think about
locking in the SQL Server and bad data (one truncate while the other already inserted the new data and get no rows, if there is no locking).
But TRUNCATE is much better in this case probably then DROP and DELETE, since it is faster, and locking will be shorter (hopefully the application use the correct locking). There are other reasons why TRUNCATE is better, and other people already mentioned
most of them, but time in this scenario might be critical.
>> having a script that handles both dropping and creating the physical table, and also creating the SP?
I do not undestand what is this second step. we said that you truncate the table, so why do you need to
dropping and creating the physical table and who
creating the SP?
Are you meaning that the application create the tables and SP?
There are lot of application that during installation create the database structure. is this what you mean?
Ronen Ariely
[Personal Site] [Blog] [Facebook]
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I have an include within a program that has some code in it. If I put a break point in the code, it never reaches it. I have put a break point in the bit before the include, and it just steps straight over it. Can anybody suggest why this might be
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Gmail will not open except in HTML My homepage ButchNews.com will not display google ads, nor content from some widgets. Facebook messages will not open. But everything works fine in Explorer... except I hate Explorer.