Adding role in fk column name
Hi,
2 entities PROJECT and EMPLOYEE; with two 1:N relations between these two entites : "commercial representative" and "manager".
a projet has one manager (employee) and a projet has one commercial repr.
By default (naming templates), the fk columns are named EMP_ID and EMP_ID1....
it doesn't seem to be possible to name automatically the fk columns with the role defined in logical model (using properties Name on source/name on target, on size "cardinality 1") on a 1:N relation.
For example : EMP_ID_Manager and EMP_ID_ComRepr
Manually renaming is not for me a good solution because if i apply naming standards after renaming my columns, my names is lost.
Is there any solution ?
if no, can it be a new feature in a next release ?
Regards
Fabrice.
is it DM 3.3 or the following It'll be DM 3.3.
Changing the name manually is not viable in 3.1.4 but it'll be an option in next release of 3.3 because you can lock the name and it won't change when "naming templates" are applied next time.
Philip
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Need help on getting the column names of Tabletype
I have a table Mapping with the following values: This Mapping table contains the table names (in Tabname) and the column names(colname) of various tables and values(ValuesTobeFilled) for the columns.
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Note: The Mapping table need not contain all the columns of the base table. The columns that are not present can be filled with null. And this mapping table is not fixed i.e. rows can be inserted/deleted frequently.
Sample values in mapping table:
Tabname Colname ValuesTobeFilled
sample_items Eno Corresponding Expression to get the values from XML input
sample_items Ename Corresponding Expression to get the values from XML input
XXX YYY Corresponding Expression to get the values from XML input
Before filling in the actual tables, I have to store the entire data temporarily and I have used a tabletype declared as follows:
TYPE T_sample_items IS TABLE OF sample_items%ROWTYPE INDEX BY BINARY_INTEGER;
l_sample_items T_sample_items;
Where the table sample_items have the following columns:
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1 XXX - -
I have declared a cursor to select the values from mapping table and I need to fill in the ValuesTobeFilled values to the corresponding table.
CURSOR c_xpath (c_tname mapping.TABNAME%type)
IS
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p_tname := CRSR.TABNAME;
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THEN
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Many thanks,
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Based on the limited description of your problem I would imagine you
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How to validate column name in dynamic made sql?
Oracle db, jdbc, web app with struts2/spring.
Example table could be this:
CREATE TABLE album
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title varchar2(50) not null,
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The basic sql usually look like this.
String sql = "select album_id, artist, title, released from album";Then in the html page the user can add search criteria for each column. Like type "iron maiden" in artist field, put "1982" in released field. And you all know what the exceptionally result should be from that :)
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}we try use prepared statements right? So we use ? as placeholders, and then add "iron maiden" into this statement later on.
Nice, no big fuzz right, and pretty safe from sql injections i guess.
But now I have to have an if/else for every single field in the table. Boring. In my app I got like 25 tables like this, with 20 columns minimum. Copy/Paste have never been so boring.
I also might have to add "order by" with user selected columns and their order. I have to count the query to get total result in case i got to split it up in pages. So there is alot of if/else and sql = sql + "more stuff", and sticking to ? and pure prepared statements is impossible.
But doing this is not good either:
for( each element in a map)
sql = sql + " and nvl( " + key + ",' ') like ?"
}Where key is "artist".
In struts and other tag libs its easy to make kode like:
<s:textfield name="model.addSearch( 'artist' )" value="%{model.getSearch( 'artist' )}" size="30" />
Silly example maybe, but just to make a point.
Inputed values in an html form, can very easily be a part of a dynamic created sql - which becomes a security problem later on.
Artist is an column name. Key should be validated if it contained an valid column name.
I could make a list of strings, containing valid column names to check against.
My question is if there is possible to get this type of information from the database, so I don't have to hand-make these lists?
But I also want to keep the number of heavy and slowing queries down.
My app have like 25 tables now, and I could easily get away with hand-make everything, copy/paste around etc. But I have more projects and this question will be here next time too. And after there again...Etharo wrote:
Metadata. Then I have to query the database, take the result and use it for validating of input. If my sql only query 1 table, then this is ok. In this case I could do with that. But if the sql query mutliple tables, with sub-selects, unions etc. Then I might have to query all tables first, and even then I might not have what I want.
The best way is of course to run the query, then get the metadata from that query - cause then im 100% sure what columns will be returned, and then I can validate with that.... 1 query is often not that slow. But I might query once to find total number of rows the query return in order to decide if we need to page the result. then query to get the metadata for validating input, then query to get the result... Maybe this is ok -but my head don't like it as an general ok thing to do, but I can't really say why...If you have a gui screen then it needs to correspond to some specific query. It can't be all possible combinations.
So once you know the query you can obtain the meta data using a query that returns no results. Like the following.
select * from mytable wheren 1 = 0
>
Jschell:
I agree to what you say. I don't understood everything you said tho.
Im not sure if you talk about having 1 search field (like google), and you input stuff there that might be in any columns.
I have several search fields in one-to-one relasionship with view column/sql query column.
Then you already know what the field represents. So validate it in the gui and not via the database.
The first is way more advanced since you have to cover any input, any column, any case etc. Pluss add ranking. Lots of work for someone who have done little searchengines.
Latter is simpler, but might also be limiting.Huh?
As an example if you have a call center then the operators are not going to be doing unrestricted searches to find customers. They are going to look using a very limited set of data like the customer name and telephone number.
>
My job is very much like an consulent. They got an app, I shall add a new feature. The app is old and ugly coded. My boss ask how long it takes to make this, I say 2months, he decide 1 month. My dev time for features is rarely above 1 month, and I don't make much new apps.
So I don't have the time to make advanced codegenerator, or spend time to evaluate various frameworks. Bringing an framework into the existing code is actually difficult. But I do want to improve the code, and add good code into the existing app that can be extended without evil pain.
That doesn't jive with your OP. You made the following statement "My app have like 25 tables now, and I could easily get away with hand-make everything,...".
That suggests that you are doing much more than simply updating an existing application.
If you only need to add one new field then you should do only that. You shouldn't be attempting to add a system spanning validation system.
On the other hand if you are in fact adding a validation system, then code generation makes it likely that it would take less time or no more than the same. And it is less likely to introduce bugs.
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Learn about frameworks? Got no time. Hope I will get the time, but I won't. The customer must want to spend the money so I can get the time, that won't happen cause an framework does not add features, its only cost saving in terms of dev time, and maintenance time. The customer have no such focus/interest. They got a bit money to spend now and then regularily. i.e. government.
I just want to try code as good as possible so I save myself from errors, painfull rewrites, and dev-time that gets out of proportions because of stupid code. So the question is actually about me trying to improve myself, its just that i don't know how right now.There are two goals.
1. Implement a specific feature in an existing application.
2. Learn a new way to solve problems.
Nothing says that the second will help with the first. They should be addressed separately and your post doesn't make it clear what the first is so it is hard to say how it should be down.
As for the second I already made a suggestion which provides two new ways to solve problems. -
Dual Case Column names fail in select ORDER BY clause
This one is solved, but I thought someone might be able to explain why it happens.
I'm a newbie, since I just downloaded Oracel XE last night, and am trying it out.
I set up a trivial table with 4 text columns. As it happened, I used dual case for some of my column names, such as 'Nickname'.
When trying out the Query Builder, the Select statement failed whenever I added a sort.
After some head scratching and back-and-forth with the sample data base (HR), I finally renamed all the columns to upper case. (e.g. column 'Nickname' became 'NICKNAME'). Then it works.
Seems like a bug, but maybe it's just a feature. Here's the code generated by the Query Builder. As you can see, there are no quotes around the Table name or column names in the ORDER BY clause (and the dual case version of the column name works if I put the quotes in manually and run it with SQL command.) Seems quirky.
select "TEAMS"."NICKNAME" as "NICKNAME",
"TEAMS"."CITY" as "CITY",
"TEAMS"."DIVISION" as "DIVISION",
"TEAMS"."CONFERENCE" as "CONFERENCE"
from "TEAMS" "TEAMS"
order by TEAMS.NICKNAME ASCWelcome to forum. :)
Now, answering your question - no i don't think this is a bug.
It is your code - which create this bug.
Now, question is - what happen?
Just check your select and from clause. You put all the names are in double quote. When you put anything within double quotes - it become a case sensitive. So, the problem occurs there.
Let's see ->
satyaki>
satyaki>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
Elapsed: 00:00:01.11
satyaki>
satyaki>create table s_otn
2 (
3 id number(4)
4 );
Table created.
Elapsed: 00:00:02.14
satyaki>
satyaki>set lin 80
satyaki>
satyaki>desc s_otn;
Name Null? Type
ID NUMBER(4)
satyaki>
satyaki>desc S_OTN;
Name Null? Type
ID NUMBER(4)
satyaki>
satyaki>desc s_OtN;
Name Null? Type
ID NUMBER(4)
satyaki>
satyaki>drop table s_otn;
Table dropped.
Elapsed: 00:00:05.22
satyaki>
satyaki>
satyaki>create table "S_otn"
2 (
3 id number(4)
4 );
Table created.
Elapsed: 00:00:00.12
satyaki>
satyaki>
satyaki>desc S_otn;
ERROR:
ORA-04043: object S_otn does not exist
satyaki>
satyaki>desc S_OTN;
ERROR:
ORA-04043: object S_OTN does not exist
satyaki>
satyaki>desc s_otn;
ERROR:
ORA-04043: object s_otn does not exist
satyaki>
satyaki>desc "S_OTN";
ERROR:
ORA-04043: object "S_OTN" does not exist
satyaki>
satyaki>desc "S_otn";
Name Null? Type
ID NUMBER(4)
satyaki>Got me?
Regards.
Satyaki De. -
Setting Column Names in Dynamic Pivot Query
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v_as VARCHAR2(4);
v_range_from NUMBER;
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v_range_to := :P1_FY_TO;
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|| 'LEFT OUTER JOIN ('
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|| 'FROM PROJECT_FY_HEADCOUNT '
|| 'JOIN PROJECT_FY USING (PF_ID) '
|| 'WHERE PL_ID = ' || :P1_PROJECT || ') B '
|| 'ON A.FY_ID = B.FY_ID)';
RETURN v_query;
END;I need to invoke GET_QUERY_COLS(v_query) somewhere to get the column names, but I'm not sure where I need to call it and how to actually set the column names after getting the returned colon-delimited list.
Can you (or anyone else) please help me get a little further? Once again, feel free to login to my host account to see it first hand.
Thanks again!
Mark -
Dynamic forms using dynamic column names
I have a table with columns such as level_1, level_2, etc.
until level_11 and I have another table with level_id and
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I've played around with the formatting and still can't quite
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Thanks for the help!Get to know CF's structure / array notation. This comes in
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Anything in the above example surrounded by quotation makes
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Vector columnNames = new Vector();
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try
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Common.Data.DataAccesser da = new Common.Data.DataAccesser();
Connection connection = da.getConnection();
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String sql = "Select * from schedule1";
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ResultSet rs = stmt.executeQuery( sql );
ResultSetMetaData md = rs.getMetaData();
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for (int i = 1; i <= columns; i++)
columnNames.addElement( md.getColumnName(i) );
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Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++)
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data.addElement( row );
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stmt.close();
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hi
I have applied sort functionality to the Table columns. It is working fine but I need to read the table column name before sorting ( On which column user trying to sort ).
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Thank you very much for your valid input.
But I am facing one problem here. To get sort functionality I added following logic in WDDOMODIFYVIEW method.
DATA wd_table TYPE REF TO cl_wd_table.
CHECK first_time = abap_true.
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wd_this->table_control ?= wd_table->_method_handler.
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and added following code in SORT ACTION of table i.e.
wd_this->table_control->apply_sorting( ).
To get column name I am using the method in SORT ACTION of table which you mentioned but always I am getting COL_NAME1 only....
Please help me how can I rectify this...
Thank you
Rama
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