Table - indexing

Similar Questions

• Question table index

  Hello world

  I know that I can use a table to reshape to convert a 2D 1 d.

  But I'm curious of know how is it when I wire a 2D in an array of index table, and there is no constant for the index entries, the result comes out as a 1 d array?

  How it works in this case? could someone please explain that to me?

  Index functions Array always returns the element or subarray n-dimension table to index. By default, if you do not connect the index , the first input terminals line sub-table index 0, the second subarray index 1st row and so on.

• Slow table indexing when you use a subroutine

  I wrote a labview code that extracts a range of data to an analog waveform. (3 options - last value only, all values or a specific range)

  I'm buying what I consider of large amounts of data (analog samples at 1 MHz for 20 seconds).

  I'm proceessing in a loop of consumer data and found that the functions of indexation has slowed to a crawl (~ by seek 100mSec).

  The slowdown is a linear relationship to the size of the array.

  My debug analysis concluded that, if I change one of my subroutines of code inline, the speed problem disappeared.

  Why is - this?

  My best guess is that Labview takes a copy of the table to send by the Subvi.

  I'm not editing data in the subroutine, is it possible to say LABVIEW not to do?

  Attached are 2 versions of my VI, prompt a Subvi online (sorry for the mess) others (slow) use the code as a Subvi.

  Criterion VI to create a picture of increasing size and measure search for table indexing time and the computer graphic.

  I'm using Labview 8.5.1

  iTm

  Long time user first time poster...

  Tim,

  You are quite correct.   What you might look into is recessing workmanship of your VI.  It depends on what you want to do with the final result.  Reentrant will solve this problem, but don't update the data on the front panel.

  See the following KB: differences between screws neres (Preallocate), incoming screws (part of Clones), VI models and Dyn...

• How to find on fragmented tables/index.

  Hi I am using oracle 10g. is there a way to know more fragmented tables/indexes, so that the reorganization or reconstruction of to improve sql performajnce?

  930254 wrote:
  Hi I am using oracle 10g. is there a way to know more fragmented tables/indexes, so that the reorganization or reconstruction of to improve sql performajnce?

  Its a great time you read all messages written by Jonathan Lewis on the fragmentation and first understand what it is in true before thinking about to remove it.
  http://jonathanlewis.WordPress.com/category/Oracle/infrastructure/fragmentation/

  Aman...

• How to import tables, index, tablespace, etc. of a DMP.

  Hello
  
  I would like to know how to import tables, index, tablespace, etc. of an export an Oracle 10.2.0.1 to apply on an Oracle 11.2.0 DMP. When I import the DMP file a unique Tablespace, for example, will users tablespace data.
  
  On the basis of origin, we have different tablespace each separated with different content (tables, index) and I would like to know if it is posible to import the same schema, tables, index, tablespace quite with a DMP alone, Export. I can't use DBUA because the database on the 10.2 software is missing, I have only one file (24 GB) DMP DMP!.
  
  Thanks for the reply,
  
  Sorry for my English :).
  
  Kind regards.

  The standard solution is

  -Make sure that the target user doesn't have the UNLIMITED TABLESPACE privilege, using REVOKE
  -Make sure that the target user has no QUOTA on the default tablespace using ALTER USER... QUOTA
  -Make sure that there is quota on the tablespace (s) of the target, using ALTER USER... QUOTA
  -import indexes = n
  -empty the index orders in a separate file
  IMP indexfile =...
  -run this file

  --------------
  Sybrand Bakker
  Senior Oracle DBA

• Partitioning of Tables/indexes

  Hello
  
  Oracle Version 10.2.0
  O/s Version: SUSE Linux
  
  Currently, all tables and indexes are stored in the ponit of NFS mounting. I would like to know if I can partition the tables/indexes on local storage temporarily.
  
  Thank you

  Hello
  Yes you can do it. But if you have a few scores on NAS and others on the local drive, then depending on the nature of the query/DML you will see some performance issues.

  MSK

• A different function is created instead of the expected (table Index instead of initialize array) Labview - a 8.5

  Hey all,.

  I have a really strange behavior here. I'm using LabView 8.5. I open a white VI and try to use the function "initialize the array.

  No matter where and how I find (using search functions, or by accessing the 7.x-> table-> table initialize function), when I drag and drop it off at my VI, what I get is "Array Index" instead!

  Even when I hover over the icon table inside the palette is initialized, with aid switched on (Ctrl + H), what I see is the help page for table of Index. It's as if somehow the index table replaced function Initialize array entirely, with the exception of the simple icon in the palette...

  I tried to restart Labview and my computer nothing works.

  Someone at - he never experience a similar problem? that means, one different function other than for being created. I have attached a screenshot.

  Thank you

  -Anne Marie

  Thanks for your replies.

  My palette is screwed a bit isn't it? Most likely because the installation I chose a bunch of older versions in favor... and I regret it now.

  Funny enough, during the search in the functions that it only brings me version 7.x of functions of table etc... but I can manually find the standard in my palette, and of course, version 8.5 standard functions seem to work...

  I need to finally do an install of cean, but for now, it's all good!

  Thank you

  Anne Marie

• problem of quadrature table indexing

  Hello world. I work ona program to read the entry from the angle of a quadrature encoder. I get reads very well, but I try to export the data into a table of excel as well as to obtain the minimum and maximum angle read by the encoder. My program seems to just replace the original table instead of index value. the saved file is always just a value - the last value read by the program. For any help or suggestion would be greatly appreciated.

  Thank you!

  Give this a go.

• Table index String function?

  Using the Index of an array of strings, said "the connector pane displays the types of data by default this function is polymorphic." but it doesn't seem to be polymorphic. I can only call a table 1 d of channels in the table of chains and a string to a string. Miss me something really obvious or aid is wrong.

  I'm not exactally new to LabVIEW, but I didn't realize that now (thanks to quick drop) that this feature exists.

  Other the ability to concatenate the input string with the indexed array element string why Index of array of strings does exist? Is there any other reason to use instead of the array index generic function?

  With the help of LabVIEW 2010.

  Steve:

  I went ahead and filed a CAR (#279806) documentation to get this corrected. Thanks for putting in place!

• On the analysis of the oracle Tables, indexes

  Hi guru,.

  Thanks for the previous help.

  I have scenerio

  I have three table which is refreshed weekely (Truncate and load).

  I have to manually analyze using DBMS_STATS. GATHER_TABLE_STATS?

  My knowledge is when we insert frequently so only we analyze tables and their indexes.

  I'm using the Oracle version:

  1 oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production

  2 PL/SQL Release 11.2.0.3.0 - Production

  3 "CORE 11.2.0.3.0 Production."

  Thnaks,

  truncation does not remove the object statistics:

  -11.2.0.1.

  create table t

  as

  Select rownum id

  of the double

  connect by level<=>

  SQL > exec dbms_stats.gather_table_stats (user, 't')

  PL/SQL-Prozedur been abgeschlossen.

  SQL > select num_rows, last_analyzed from user_tables where table_name = 't';

  NUM_ROWS LAST_ANA

  ---------- --------

  10000 16.04.14

  SQL > truncate table t;

  Tabelle mit TRUNCATED geleert.

  SQL > select num_rows, last_analyzed from user_tables where table_name = 't';

  NUM_ROWS LAST_ANA

  ---------- --------

  10000 16.04.14

  So if your table contains almost the same data after the operation of loading/truncate old statistics may be sufficient. But it is difficult to imagine you do a TRUNCATE/loading operation to re-import data - almost certainly is a good idea to gather statistics after the operation of loading/truncate, if you have the time and resources to do this.

• How to identify table indexes

  Hi all

  11.2.0.1

  Is it a good idea to create indexes on all columns used in conditions WHERE all QUERIES?

  Thank you

  Petra k.

  Is it a good idea to create indexes on all columns used in conditions WHERE all QUERIES?

  No - you need not index in order to query the data in a table.

  Don't add indexes without specific reason to add them.

  Two reasons/cases of primary use for the addition of an index are:

  1. to support the operations of INSERTION/update and ensure the integrity of the data. For example, to enforce a primary key or a unique constraint. This prevents duplicate data never broke IN the table.

  2. to improve the performance of queries. An index can improve the performance of certain queries and know whether or not MAY depend on the predicates used in the WHERE clause. But a clue can also reduce the performance of the other queries.as that John has shown you. In addition an index can degrade the performance of DML operations because EACH index may need to be updated if the data is changed. The indices more you more the decline in performance possible.

  Statistics are just as important as the index. Oracle needs on the table and index statistics to make the right decision on whether to use a particular index. Adding an index without having the appropriate current statistics is a waste of time.

  But back to what I said earlier: add indexes without specific reason to add them. This means that appropriate tests to determine:

  1. what impact has the index on queries you're trying to improve

  2. what impact index has on other requests - as mentioned previously it could be NEGATIVE impacts to other queries if Oracle uses your new index for them when it shoudn't.

• What happens to the existing after the partition of table index and created with local index

  Hi guys,.

  / / DESC part id name number, varchar2 (100), number of wage

  In an existing table PART I add 1 column DATASEQ MORE. I wonder the part of table based on dataseq.now, the table is created with this logic of partition

  create the part table partition (identification number, name varchar2 (100), number of salary, number DATASEQ) in list (dataseq) (values partition PART_INITIAL (1));

  Suggestionn necessary. given that the table is partitioned based on DATASEQ I wonder to add local indexes on dataseq. to dataseq, I have added a local index create index idx on share (dataseq) LOCAL; Now my question is, already, there are the existing index is the column ID and salary.

  (1) IDX for dataseq is created locally so that it will be partition on each partition on the main table. Please tell me what is happening to the index on the column ID and salary... it will create again in local?

  Please suggest

  S

  Hello

  first of all, in reality 'a partition table' means create a new table a migration of existing data it (although, theoretically, you can use dbms_redefinition to partition an existing table - however, it's just doing the same thing behind the scenes). This means that you also get to decide what to do with the index - index will be local, who will be global (you can also reassess some of existing indexes and decide that they are not really necessary).

  Second of all, the choice of the partitioning key seems weird. Partitioning is a data management technique more that anything else, in order to be eligible, you must find a good partitioning key. A column recently added, named "data_seq" is not a good candidate. Can you give us more details about this column and why it was chosen as a partitioning key?

  I suspect that the person who proposed this partitioning scheme made a huge mistake. A non-partitioned table is much better in all aspects (including the ease of management and performance) that divided one wrongly.

  Best regards

  Nikolai

• Load the data from table to table index

  Hello

  We need to load index per table to table data. The code below works fine.

  declare
  query varchar2(200);
  Type l_emp is TABLE OF emp%rowtype INDEX BY Binary_Integer;
  rec_1 l_emp;
  
  begin
  query :=' SELECT * FROM emp';
   EXECUTE IMMEDIATE query BULK COLLECT INTO rec_1 ;
  
  For ALL  i   in rec_1 .First .. rec_1 .Last
  Insert Into emp_b
          values rec_1 (i);
  end;
  /
  

  But data from the source table and the target table are dynamic.

  Ex:

  In code, above table emp (source) and target is emp_b are static.

  But for our scenario is dependent on the source table, target would change as below.

  If source is emp target is emp_b

  If source is emp1 target is emp_b1...

  create or replace procedure p(source in varchar2, target in varchar2)
  as
  query varchar2(200);
  source varchar2(200);
  Type l_emp is TABLE OF emp%rowtype INDEX BY Binary_Integer;
  rec_1 l_emp;
  
  begin
  query :=' SELECT * FROM ' || source;
   EXECUTE IMMEDIATE query BULK COLLECT INTO rec_1 ;
  
  For ALL i   in rec_1 .First .. rec_1 .Last
   execute immediate 'INSERT INTO ' || target || ' values ' ||rec_1(i);
  end;
  /
  
  
  

  His throw. How to implement this scenario... Please help with that?

  No particular reason to use to COLLECT EVERYTHING & BULK here? Why not ordinary

  INSERT INTO target
  SELECT * FROM source;
  

  However if that's what you need you need a dynamic PLSQL block, which comes with additional side effects (code SQL injection). Dynamic SQL is not here.

  Kind regards

• Move version activated a tablespace custom table indexes

  HY!
  
  Is it possible to move the index of $ _PKI to an existing table in the version activated for a different tablespace?
  I tried:
  
  alter tablespace to rebuild index MYTABLE_PKI$ NEW_TABLESPACE;
  
  He did not, because I'm not allowed to change an enabled veresion table.
  
  My other test makes a change from the MYTABLE_LTS after dbms_wm.beginddl ('MYTABLE'), but I couldn't see the $ index PKI on the LTS table.
  
  The WM version is 11.1.0.7.0.
  
  Thanks in advance,
  Vityesz

  Hello

  It should work.

  Make sure that he isn't trying to run a previous execution of the procedure. Check the view of all_wm_vt_errors for all of the lines on the VIKTOR. Table TEST_VIKTOR. If there is, you will need to call the procedure with the parameter ignore_last_error set to true. This should remove the all_wm_vt_errors line, how you can run it normally.

  Kind regards
  Ben

• Delay in a partitioned table index population

  Hello
  
  We have a 3 TB database, which earns about 5 GB per day. Fat is partitioned by date (a partition for each day), as well as their local indexes. The population of data is made by IBM DataStage and assume that it uses a bulk loading. I have 2 questions:
  
  1. is the index updated immediately for cargo in bulk, or Oracle wait until the load has finished updating indexes on table?
  2. is there a way to tell Oracle to have an index for a table, but not for a partition of this table? What I want to do is fill partition today the table with data today, but be able to build the index for this partition at a later date. Deletion and re-creation of the index for the entire table are not an option.
  
  Thank you.

  What you would normally do here is to load the data into a separate intermediate table, build indexes on this staging of the table, and then create a swap partition to load the data into the partitioned table. Exchange partition is a way to exchange very quickly a partition of a partitioned with a separate table and unpartitioned table. This happens almost instantly.

  Justin