Estimating redo size of alter table DROP COLUMNS CONTINUE checkpoint of 10000

Similar Questions

• alter table drop column

  Hi all

  I create a simple table like this:

  create table x (a number, b varchar2 (20));

  ALTER table x modify a primary key constraint a_pk;

  insert into x values (1, 'first row');

  insert into x values (2, 'second row');

  commit;

  Then:

  SQL > select * from x;

  A AND B

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

  1 first row

  2 second row

  Then I run these commands:

  SQL > alter table drop column x.

  Modified table.

  SQL > select * from x;

  B

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

  first row

  second row

  Question: Why am I able to remove this column when a PRIMARY KEY for the table? I do not use the key words of CONSTRAINT CASCADE with the DROP COLUMN clause...

  I have Mr. Steve O'Hearn here saying this in his book 'Certified Expert Guide exam 1Z0-047:

  CREATE TABLE ORDER_RETURNS

  (NUMBER OF ORDER_RETURN_ID,

  NUMBER OF CRUISE_ORDER_ID

  DATE OF CRUISE_ORDER_DATE,

  CONSTRAINT PK_OR PRIMARY KEY (ORDER_RETURN_ID));

  .. We can not remove the column the table ORDER_RETURNS that

  is subject to the constraint PRIMARY KEY (ORDER_RETURN_ID)... The reasons are:

  ORDER_RETURN_ID is the PRIMARY KEY of this table...

  Isn't this correct?

  No - it's NOT correct - the book is bad.

  You could have just tested the FULL example in the book to verify that the statement is wrong.

  http://weirdoootamee.yolasite.com/resources/Oracle%20sql%20expert.PDF

  See page 432

  CREATE TABLE CRUISE_ORDERS
  (NUMBER OF CRUISE_ORDER_ID,
  ORDER_DATE DATE,
  PK_CO (CRUISE_ORDER_ID, ORDER_DATE) PRIMARY KEY CONSTRAINT);

  CREATE TABLE ORDER_RETURNS
  (NUMBER OF ORDER_RETURN_ID,
  NUMBER OF CRUISE_ORDER_ID
  DATE OF CRUISE_ORDER_DATE,
  CONSTRAINT PK_OR PRIMARY KEY (ORDER_RETURN_ID).
  FOREIGN KEY CONSTRAINT FK_OR_CO
  (CRUISE_ORDER_ID, CRUISE_ORDER_DATE)
  REFERENCES CRUISE_ORDERS (CRUISE_ORDER_ID, ORDER_DATE));

  create two tables - add data, if you want.

  Then try to delete the primary key column and see what happends

  ALTER table drop column order_return_id order_returns;

  The best way to learn is to actuall TRY of THINGS.

  Try it with your own table, but the FIRST thing that you should try was the real example of the book.

• ALTER table drop column is too slow on the big table

  Hi all
  the user has run after a command in oracle 10 G: - >
  ALTER table < table name > Delete column (< cloumn list >); table in question is of a size 41GB.
  
  the results of the command to cancel space filled.
  Tips of even trace file cancel segemnts.
  
  query failed for hours.
  Why cancel is linked to this
  and what would the resolution for this.
  
  Unused help set...
  
  
  Thanks in advance,
  Rock

  Would it be useful to assign unused columns?
  What about dbms_redefinition?

• Reclaim space after ALTER TABLE DROP PARTITION

  Hello
  
  I have a partitioned table. My requirement is to reclaim the space by dropping a partition of the table.
  
  Is it possibe to recover space for the tablespace by dropping a partition of partition table?
  
  Thank you

  Hello

  ALTER TABLE DROP PARTITION will always return the space to the storage to be reused by other segments.

  It's the ALTER TABLE TRONQUER SCORE, where you can specify DROP STORAGE or of REUSE STORAGE clause (in case of re-use, the space is not released and can be used by the new lines inserted in the same partition). The DROP STORAGE should be the default option.

  But for the fall of the score, you don't have to worry.

  Kind regards
  Martin

• Invalid procedure after alter table add &lt; column &gt;

  Hello Experts,

  I was faced with a situation where I add a column in a table that is used in a procedure, immediately after the addition of the new procedure associated with this table column becomes invalid.

  Can someone explain please know why this happens.

  Database version:-11.2.0.4.

  I was faced with a situation where I add a column in a table that is used in a procedure, immediately after the addition of the new procedure associated with this table column becomes invalid.

  Can someone explain please know why this happens.

  Yes - the Oracle documentation explains this. I found this doc with a simple search of "column, add the oracle 11g invalid procedure.

  http://docs.Oracle.com/CD/B28359_01/server.111/b28318/dependencies.htm#CHDJIIFC

  Table 6-2 , shows how objects are affected by changes to other objects upon which they depend.

  Table 6-2 operations affects this object status

  Operation	Where the status of dependent objects
  ALTERTABLEtableADDcolumn	INVALIDWhen: Uses of the object (except a view)-dependent SELECT * on table . Dependent object uses table %rowtype . Dependent object performs INSERT on table without specifying a list of columns. Dependent object references table in the query that contains a join in SQL. Dependent object references table in the query that refers to a PL/SQL variable. Otherwise, no change.

  Read the WHOLE ARTICLE and see if it does not have to explain your problem.

• ALTER Table Add column not null, no default

  I want to add two columns in a table with not null, and the default value 0 for two columns
  Can I write everything in a single statement or do I have to divide the declaration
  I tried, but didn't work
  
  ALTER table DWSODS01. DWT00301_ORD_DTL_OMS add)
  COMB_ORD_FLG NUMBER (5.0) default null, 0
  COMB_ORD_NO NUMBER (12.0)
  by default, 0 not null);
  
  How can I change the code?

  user10390682 wrote:
  OK, so if it is NOT NULL, while there should be a value.

  Yes.

  So, when I set these two columns as NOT NULL will only future data must be NON NULL.
  What of the old and present data if I defined as NOT NULL

  NOT NULL mean value of eachcolumn + line (current or future) _ must not be null. That's why always adding NOT NULL column to a non-empty table fails - the column value for existing lines will be NULL which does NOT violate the constraint nullability. If you add the NON NULL column with a default value, the column will be added and all lines existing column value will be defined by specified default (0 in your case). As a result Oracle will be able to settle forced to null for this newly added column from the value of this column in all the existing lines will be not not null (0 in your case).

  SY.

• Generate the DDL - change is a new column and I want to generate an alter table.

  All, morning
  
  I searched and searched all over the Data Modeler and I can't find this option... but I found it easily in the designer.
  I hope you can help me.
  
  V3.0.0.665 SQL Developer Data Modeler.
  
  I added a new column to a table, and when I generate the DDL I wish it were an alter table add column rather than a table to create.
  This feature is in the designer, so I think it would be in the Data Modeler.
  
  Just in case my description isn't clear, here are the high level steps, then it is clear.
  
  1 create logic model
  2. create the relational logic.
  3. create the physical relationship.
  4 generate the DDL and run in the database. At this point, I'm going to production with my system, and all right.
  5. at this point, we have an enhancement request. For the model, it will be a new column in a table.
  6. update of the logic model.
  7. relational update logic
  8 physical update of relational
  9 generate the DDL. Here, I would have generate it know that it needs to generate an alter table add column and does not create the table.
  This is something I do a lot as all my models are in production. I can't find how to do this step to get data Modeler to generate the altar.
  Designer done exceptionally well.
  
  Quite often, it is more than a single column. Changes can be many and made over time and at the time of generating the DDL you remember not every single amendment. To have the tool discover these changes for you and generate the appropriate DDL is a feature that I consider as very high.
  
  I hope that is clear and you can help me.
  
  See you soon
  Chris...

  Hi Chris,

  you need to compare your model on database - database relational model even import and use the option 'swap target' - in this case 'expressions of alter' against the database will be generated.
  You can watch demonstrations here http://www.oracle.com/technetwork/developer-tools/datamodeler/demonstrations-224554.html
  It would probably be more useful http://download.oracle.com/otn_hosted_doc/sqldev/importddl/importddl.html
  Sooner or later your changes will require the table to be recreated, and you will need to backup your data - you can consider using the 'Advanced DDL' option - script is generated that will land your table content (including LOBs) to the system of files accessible from the database and restore after changes. Well not try directly on the production system :).

  Philippe

• NOLOGGING in alter table split partition...

  Hi all
  
  Please can tell me where I would add the NOLOGGING in the below statement, or any other means by which I can stop to redo being generated
  
  ALTER table split partition EB_LOGS_082008 at (to_date('01-01-2010','DD-MM-YYYY')) NOLOGGING EB_LOGS into (partition EBLAST_TABLE, partition EB_LOGS_012010 tablespace EBLAST_TABLE tablespace EB_LOGS_082008) parallel;

  Wow... Grammar ALTER TABLE just constantly more and more complex, isn't?

  According to this:
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e10592/clauses005.htm#CJAHABGF

  "For partitioned objects, the value specified for this clause is the physical attribute by default segments (and ALTER following... associated with all the partitions specified in the CREATE statement ADD PARTITION statements), unless you specify the logging attribute in the description of the PARTITION. »

  If I read that correctly, so if you want the NOLOGGING keyword to indicate more than just the physical default attribute, then it must be in the description of the PARTITION.

  So something like this, perhaps?
  Totally not tested, BTW:
  ALTER table EB_LOGS split partition EB_LOGS_082008 at (to_date('01-01-2010','DD-MM-YYYY')) into (partition EB_LOGS_082008 tablespace EBLAST_TABLE nologging, partition EB_LOGS_012010 tablespace EBLAST_TABLE nologging) parallel;

  Once again, this is an assumption and cannot yet pass the analysis.

  In regards to the perceived dangers of NOLOGGING operations, well, it is certainly something that must be clearly understood, but not to fear. The disadvantage of an operation NOLOGGING is that if you need to recover from a backup taken before the NOLOGGING operation, until a point in time after the operation NOLOGGING objects in the database that were submitted to NOLOGGING operations will logically corrupted and must be rebuilt.

  Finally, I fell on this can also be useful, regarding the optimization of SPLIT PARTITION operations:
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e10837/part_admin.htm#VLDBG00304

  Hope that helps,

  -Mark

• ALTER TABLE with the column NULL time consuming

  Hello

  I have a table with nearly 2 million documents (about 10 GB size table) when I perform the following change statement its run fast

  ALTER TABLE tbl_1 ADD (DEFAULT col_4 NUMBER 100 NOT NULL);

  but when I do not give the NOT NULL in the alter its taking a long time to complete this i.e tbl_1 of ALTER TABLE ADD (NUMBER col_4 by DEFAULT 100); once I do the column as NOT NULL.

  Can someone explain why is it happening like that regarding the execution point.

  Thanks in advance.

  I can reproduce the effect in 11.2.0.1 - but not in 12.1.0.1.

  drop table tbl_1;

  create table tbl_1

  as

  Select rownum id

  , lpad ('* ', 50,' *') padding

  of the double

  connect by level<=>

  ALTER TABLE tbl_1 ADD (NUMBER col_4 by DEFAULT 100);

  --> slow in 11.2.0.1; fast 12.1.0.1

  ALTER TABLE tbl_1 ADD (DEFAULT col_4 NUMBER 100 NOT NULL);

  --> Quick 11.2.0.1 and 12.1.0.1

  A SQL trace for two operations (11g) shows that the altar slow (without the constraint explicit non-null) made explicit (and tedious) update of any row in the table:

  Update 'TBL_1"set"COL_4"= 100

  call the query of disc elapsed to cpu count current lines

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

  Parse        1      0.00       0.02          0          1          0           0

  Run 1 11,63 33.56 8336 1016125 2053531 1000000

  Fetch        0      0.00       0.00          0          0          0           0

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

  Total 2 11,63 33,58 8336 1016126 2053531 1000000

  The other trace file does not contain the explicit Update. I guess in the optimized case that oracle stores somewhere that col_4 has the value 100 and updates only the line of the block after completing DML operations. But that's just a guess.

• ORA-14452 attempts to create, alter or drop an index on a table temporary alr

  I'm trying to edit a column in my global temporary table.
  When I try to run the query, I get this error...
  ORA-14452: try to create, alter or drop an index on a temporary table already in use
  
  It is the solution that I found in google.
  Action: All sessions using the session-specific temporary table must truncate table and all transactions using the specific temporary table have to end their operations in transaction.
  
  How can I make sure that the transaction is complete
  or what is the best way to solve this problem?
  
  Thank you

  Tell everyone to disconnect from the database. If they won't come out and it is a change of mission critical and killing their session will have undesirable consequences for the data, and then kill their sessions. Hell you could bounce back just the database, that everyone will come out and then don't open it back to connections non s/n until your done with your DOF on the TWG. Of course, you probably want to do during a scheduled maintenance window if it is a production environment because it tends to make people grumpy when you surreptitiously gives them the boot.

  Depends on the importance, it's to make the change, on the other hand, the importance is keeping your DB online and/or your connected users.

• ALTER TABLE hf_altertest ADD COLUMN does not

  I am using ORACLE 11g and my FDI is Developer SQL 4.1.1

  It's all free PC version that has limits.

  I tried on:

  CREATE TABLE hf_altertest

  (

  contact_id INTEGER NOT NULL

  , name VARCHAR (25)

  , last_name VARCHAR (35)

  PRIMARY KEY (contact_id)

  );

  ALTER TABLE hf_altertest State to add a CHAR (2) COLUMN;

  But when I go to run the ALTER TABLE statement then I get following error:

  rror starting at line: 1 323 in command.

  ALTER TABLE hf_altertest State to add a CHAR (2) COLUMN

  Error report-

  SQL error: ORA-00904: invalid identifier

  00904, 00000 - '% s: invalid identifier '.

  * Cause:

  * Action:

  I can run the same code in MySQL without error.

  This leads me to think that maybe I'm just bumping into a limit in the free version of PC.

  Any thoughts?

  3003916 wrote:

  I am using ORACLE 11g and my FDI is Developer SQL 4.1.1

  It's all free PC version that has limits.

  ALTER TABLE hf_altertest State to add a CHAR (2) COLUMN;

  But when I go to run the ALTER TABLE statement then I get following error:

  rror starting at line: 1 323 in command.

  ALTER TABLE hf_altertest State to add a CHAR (2) COLUMN

  Error report-

  SQL error: ORA-00904: invalid identifier

  00904, 00000 - '% s: invalid identifier '.

  * Cause:

  * Action:

  I can run the same code in MySQL without error.

  This leads me to think that maybe I'm just bumping into a limit in the free version of PC.

  Any thoughts?

  There is no LIMIT to the 'free' version  If you read the error message he said THAT was not a valid identifier.  Just to show you that I tried your erroneous statement

  ALTER TABLE hf_altertest ADD COLUMN state2 CHAR(2);
  

  and here is the indicator error message in SQL +.

  SQL * more: Production of liberation 12.1.0.2.0 Tue Oct 15 14:34:57 2015

  Copyright (c) 1982, 2014, Oracle.  All rights reserved.

  Connected to:

  Oracle Database 11 g Enterprise Edition Release 11.2.0.4.0 - 64 bit Production

  With the partitioning, Real Application Clusters, Automatic Storage Management, OLAP

  and Data Mining options

  Add a COLUMN state2 TANK (2)

  *

  ERROR on line 2:

  ORA-00904: invalid identifier

  As you can see (and as the previous poster of response indicates), the 'COLUMN' KEYWORD is not necessary when adding new columns.  Only when 'RENAME' is used, then you add the keyword COLUMN.

  See the documentation for the syntax of ALTER TABLE here--> http://docs.oracle.com/database/121/SQLRF/statements_3001.htm#SQLRF01001

  See specific clause RENAME syntax here--> http://docs.oracle.com/database/121/SQLRF/statements_3001.htm#i2183480

• Set the font size as JavaFX table column name

  I tried to set the font of a spirit of name of column in table size, copy the following code:

  table.setStyle ("police - fx - size: 9 ;"); ")

  But this code changes the font size of the rows in the table.

  Use an external style sheet with the rule

  .table-view .column-header-background .label {
   -fx-font-size: 9pt;
  }
  

• ALTER table - column required

  Hey guys, quick question. I have a table that is created and that you just want to make one of the columns is required. What is this done by following these steps:
  
  ALTER TABLE < my_table >
  ALTER COLUMN < my_column > MANDATORY
  
  If this isn't the case, could someone guide me on how to do it.
  
  Thank you.

  ALTER TABLE CHANGE NOT NULL;

• GetLength errors on CLOB. Retrieves the size of a table with CLOB columns

  Hello
  
  I try to find the size of a CLOB to a table column and get the error
  
  PLS-00306: wrong number or types of arguments in the call to "GETLENGTH.
  
  When you try to use dbms_lob.getlength. Here is the code
  
  
  declare
  number num.
  Start
  for rec in (select xmlupload from FILE_TABLE where file_table_id = 33635) loop
  NUM: = dbms_lob.getLength (rec.xmlupload);
  end loop;
  dbms_output.put_line (num);
  end;
  
  Database version: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
  
  
  I'm actually trying to find the size of a table with CLOB columns, is there an easy way to do this Besides using getlength and without having to contact the Administrators (they are outsourced)?

  It works fine on my computer, the version is also 10g.

  SQL> declare
    2  num number;
    3  begin
    4  for rec in (select cntnt from ims_toms_msge where rownum<3) loop
    5  num := dbms_lob.getLength(rec.cntnt);
    6  dbms_output.put_line(num);
    7  end loop;
    8
    9  end;
   10  /
  3837
  3837
  
  PL/SQL procedure successfully completed.
  

  You should check if xmlupload is the CLOB data type.
  In addition, if you just want to get the CLOB size, you can use LENGTH() as well, you will get the same result;

  SQL>  select length(cntnt), dbms_lob.getLength(cntnt) from ims_toms_msge where rownum<2;
  
  LENGTH(CNTNT) DBMS_LOB.GETLENGTH(CNTNT)
  ------------- -------------------------
           3837                      3837
  

  Published by: PhoenixBai on September 24, 2009 13:40

• Quick question: alter table, alter column NOT NULL...

  Hey all,.
  
  If I change 3 populated (they have data) columns in a table with about 300 million of NULL lines that is NOT NULL:
  
  alter table blah
  change (col1, col2, col3 NOT NULL NOT NULL, NOT NULL);
  
  ... about cela "will take a long time?
  
  I know that it is a question REALLY of high level, but I wonder how long it should consume (a few minutes or several minutes - looking for an approximate answer as well). The table has 10 columns, if that helps.
  
  Hardware specifications are not relevant... I am looking for a basic response.

  Hello

  Plug material is relevant here.
  It depends on the material/Oracle parameters/IO etc..
  You can also view v$ session_longops to track progress.

  Concerning
  Anurag Tibrewal