Adding a column to a DB table with CMP entities

Morning all.
I've been asked whether adding a column to a database table will break the CMP entity bean (EJB2) associated with the table. I suspect that it won't and that the new field will be ignored. Another developer here says that it will no longer compile (I can't see how this could be the case but still...) and I can find no evidence to either refute or corroborate either position.
Can anyone tell me for definite - if we add a column to a database table mapped to a CMP entity bean, will we HAVE to update the bean, or can we leave it ignorant of the new column?
(For the purposes of the question, please assume that the column has no constraints i.e. can be null etc.)
Thanks in advance
-- kaideejee
Message was edited by kaideejee : CMB entities? What are they? Typo fix.

Well alterations(adding / removing a column) to the
table should be made available to the bean
irrespective of the persistance(CMP OR BMP) or normal
bean with your own methods that depicts the
behaviour.
reason is simple: probably bean may/may not contain
the corresponding setter or getter or finder methods
related to the ALTERED TABLE(NEW COLUMN)The reason for what is simple? Sorry I may have missed your point there. Are you saying that it's correct practice to make it available to the bean, or that it will be made available behind the scenes, subject to getters/setters being created?
Assuming we choose not to create these getters and setters (we have a horrible hybrid monster which uses stored procedures for some things and EJB for others, so it's feasible that the EJB end may not need to see some fields used by other parts) would the entity beans continue to play nicely with the database rows, or would the additional columns throw it completely?
Cheers
-- kaideejee

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Adding a column in an internal table

Hi,
I want to know how to add different rows of a column in an internal table.
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Declaration Part-----
types : begin of imchb,
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        cumlm like mchb-cumlm,
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loop
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at end of pm_percent.
sum.
endat.
endloop.
write :/ wa_inv-pm_percent.
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Kindly suggest .

Hi,
Please try this code:
loop at int_inv into wa_inv.
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select * from v$version;
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
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Hi,
Please try this code:
loop at int_inv into wa_inv.
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Hi David,
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Adding Specific columns of dynamic internal table row into another column

Hi Gurus,
I need to add few columns of a dynamic internal table row into another column:
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Hi,
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*   matnr TYPE matnr
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*   total TYPE i
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*&      Form main
*       text
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Hello Gurus,
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Please read this:
Oracle® Business Intelligence
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Version 10.1.3.4
E12652-01
Figure 8–1 Process Flow to Add New Object to Data Warehouse
Pg 59

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Kuldip:
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Not a very easy subject heading to define, but I'll explain more now:
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<cmp-field-mapping name="password" persistence-name="PASSWORD" />
<cmp-field-mapping name="activeInd" persistence-name="ACTIVE_IND" />
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<entity-deployment name="UserRole" table="SEC_USER_ROLE" data-source="datasource-ecmsOraclePool">
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<primkey-mapping>
<cmp-field-mapping name="roleFunctionId" persistence-name="SEC_ROLE_FUNCTION_ID" />
</primkey-mapping>
<cmp-field-mapping name="functionId" persistence-name="SEC_FUNCTION_ID" />
<cmp-field-mapping name="roleId" persistence-name="SEC_ROLE_ID" />
<cmp-field-mapping name="sequenceNum" persistence-name="SEQUENCE_NUM" />
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</enterprise-beans>
<assembly-descriptor>
</assembly-descriptor>
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Hi David,
The "autocreate-tables" attribute is defined in the DTD for the "orion-application.xml" file. This file is usually generated automatically by OC4J, from your application's "application.xml" file when you deploy your application. (Note that subsequent [re-]deployments of your application will not change the "orion-application.xml" file.)
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Hope this answers your question.
Good Luck,
Avi.

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Bye

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hi :)
i would like to know, how to select in SQL all the columns names from a table with their datatypes so that i get something like this :
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I case you don't know what an alias is, it would look something like this:
SELECT a.COLUMN1 as FirstColumn1, b.COLUMN1 as SecondColumn1 FROM FirstTable a, SecondTable b
Notice that in the FROM clause we've appended a short name for each table. You're not limited to one character, but I try to keep it simple. Now we can refer to the tables as a and b.
Because I did that I have to refer to any ambiguous columns (although it's good practice to refer to ALL columns) using the table name prefix and a period. This tells the driver which "COLUMN1" I want. Then we include as AS clause which allows us to tell the driver what we want that column name to be when it's returned to us. This is specially usefule when I have two columns in two separate tables with the same name (as you have here) or if I'm calculating data (i.e. (a.QTY * b.PRICE) as UnitPrice) that doesn't have a column name, so here I can give it one.
It's a little weird at first since you use the alias names in the select before you actually define them in the FROM clause, but you'll get use to it.
Now you retrieve FirstColumn1 and SecondColumn1 from your ResultSet, not Column1.
HTH.

Adding a column to a DB table with CMP entities

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