Is it possible to create a column in runtime?

Hi,
I created a application that connect with Access database. I just wonder is it possible for user to create a column in runtime, because the application need this kind of interaction.
Many thanks,
Ann

Here's code to do that
     static void addColumn(Connection dbConn, String cname)
          Statement ins;
          String sql = "ALTER TABLE TestTable ADD "+cname+" CHAR(20)";
          try
               ins = dbConn.createStatement();
               ins.executeUpdate(sql);
               ins.close();
          catch (SQLException se){fail(se);}
     }The rest of my TestODBC example can be found at
http://forum.java.sun.com/thread.jsp?forum=31&thread=453376

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Is it possible to create a Column with Conditional Mandatory with another Column?

Is it possible to create a Column with Conditional Mandatory with another Column?
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C
12345 ABC
OK
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I guess you can't create a condtional mandatory column directly. However, you can use check constraint to on the column
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Is it possible to create a column in the runtime?

Hi,
I created a application that connect with Access database. I just wonder is it possible for user to create a column in runtime, because the application need this kind of interaction.
Many thanks,
Ann

Cross-post:
http://forum.java.sun.com/thread.jsp?
forum=31&thread=453860&start=0&range=15#2066833

Will possible to create lov,recordgroup on runtime?

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Is it possible to create a column in run time?

Hi,
I created a application that connect with Access database. I just wonder is it possible for user to create a column in run time, because the application need this kind of interaction.
Many thanks,
Ann

Code that does it is here:
http://forum.java.sun.com/thread.jsp?forum=48&thread=453846&tstart=0&trange=15
MOD

Is it possible to create editable columns in report output?

Hi guys,
I want to create a column in report output displayed using Write statement as editable such that User can change the value at the output after display.
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hi,
use this statment
WRITE: num1 INPUT
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How to create adf columns at runtime

Hello
I want to crete a component which will display results of arbitrary sql command.
for that purpose I created 'declared component' with custom component class which obtains SQL query from passed attibute and executes it.
so in my component I have
public List<String> getColumnNames() {
if (!loaded) {
loadData();
return columnNames;
public List<List<Object>> getData() {
if (!loaded) {
loadData();
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and in compDef.jspx following:
<af:table value="#{component.data}" var="row">
<af:column headerText="No">
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<af:forEach items="#{component.columnNames}" var="col" varStatus="colStatus">
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query execution is ok and component.columnNames contains several columns (checked this with af:iterator)
but it shows only 1 column (with header 'No').
If I use
<af:iterator value="#{component.columnNames}" var="col" varStatus="colStatus">
<af:column headerText="#{col}">
<af:outputText value="#{row[colStatus.index]}" />
</af:column>
</af:iterator>
it shows 4 columns instead of 2 (and doesn't show any text - that is headerText is empy and all cells are empy too)
So, can anybody tell me how is it ment to be ? Or where is the mistake ?
Version: 11g TP 4.

Thank you for your reply.
Well, if I set headers to
xx #{col} xx idx: #{colStatus.index} :idx
it shows only static text and no EL values.
(So in output I have 4 headers with text "xx xx idx: :idx")
Actually if I use suck mix of af:table and af:forEach in usual jspx file (not in component's one) - it works as expected
that is
code
<af:table value="#{Query1.data}" var="row">
<af:column headerText="xxxxx">
<af:outputText value="#{row}" />
</af:column>
<af:forEach items="#{Query1.columnNames}" var="col" varStatus="colStatus">
<af:column headerText="#{col}">
<af:outputText value="#{row [ colStatus.index ] }" />
</af:column>
</af:forEach>
</af:table>
where Query1 JSF bean performs the same functionality (executes arbitrary SQL query and stores results in data and columnNames)
works OK.
(colStatus.index is written in brackets - don't know how to disable its transformation to link, how to write preformatted code here ?)
Another point that behaviour in component's jspx is a bug - the amount of columns.
It produces 4 columns instead of 2. And I can't figure why because it doesn't show any information neither in var 'col' nor in varStatus 'colStatus'.
And if I the query returns 3 columns - number of columns in generated table is 9.
UPD. Specified behaviour is for af:iterator in the component's jspx. af:forEach produces no columns at all.
Edited by: olegk on Mar 26, 2009 11:05 AM

Is it possible to create column chart in WAD

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Regards,
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Message was edited by: Maheswaran B

Is it possible to create a generic report that accepts the SQL as a param

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Is it possible to create a dynamic(with a select) check constraint?

create table a (col_to_be_coded_fora number);
create table b (col_to_be_coded_forb number);
create table c (col_name varchar2(20), col_code number, col_desc varchar2(20));
insert into c values ('col_to_be_coded_fora', 1, 'active');
insert into c values ('col_to_be_coded_fora', 2, 'de-active');
insert into c values ('col_to_be_coded_fora', 3, 'pending');
insert into c values ('col_to_be_coded_forb', 10, 'school');
insert into c values ('col_to_be_coded_forb', 20, 'hospital');
insert into a values ( 1); -- meaning 'active' for table a, column col_to_be_coded_fora, can go in
insert into a values (10); -- meaning nothing for table a, column col_to_be_coded_fora, must give error
insert into b values ( 1); -- meaning nothing for table b, column col_to_be_coded_forb, must give error
insert into b values (10); -- meaning 'school' for table b, column col_to_be_coded_fora, can go in
I know i can handle this problem with dividing table c into to tables and creating foreign key relationship.
in this demo case i have only a and b, 2 tables but i want to encode thousands of tables with a table like c.
İs it possible to create a dynamic check constraint on a table which selects c table for the inputs that have permision?
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Kind regards.
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Hi Tonguç,
A small design change makes it possible to do this with simple foreign key constraints.
I would do something like:
ual303@ORKDEV01> CREATE TABLE c (
2    col_name VARCHAR2(20),
3     col_code NUMBER,
4     col_desc VARCHAR2(20),
5     PRIMARY KEY (col_name, col_code)
6 );
Tabel is aangemaakt.
ual303@ORKDEV01> CREATE TABLE a (
2    col_to_be_coded_fora NUMBER PRIMARY KEY,
3     col_name VARCHAR2(20) DEFAULT 'col_to_be_coded_fora' CHECK (col_name = 'col_to_be_coded_fora'),
4     FOREIGN KEY (col_name, col_to_be_coded_fora) REFERENCES c
5 );
Tabel is aangemaakt.
ual303@ORKDEV01> CREATE TABLE b (
2    col_to_be_coded_forb NUMBER PRIMARY KEY,
3     col_name VARCHAR2(20) DEFAULT 'col_to_be_coded_forb' CHECK (col_name = 'col_to_be_coded_forb'),
4     FOREIGN KEY (col_name, col_to_be_coded_forb) REFERENCES c
5 );
Tabel is aangemaakt.
ual303@ORKDEV01> insert into c values ('col_to_be_coded_fora', 1, 'active');
1 rij is aangemaakt.
ual303@ORKDEV01> insert into c values ('col_to_be_coded_fora', 2, 'de-active');
1 rij is aangemaakt.
ual303@ORKDEV01> insert into c values ('col_to_be_coded_fora', 3, 'pending');
1 rij is aangemaakt.
ual303@ORKDEV01> insert into c values ('col_to_be_coded_forb', 10, 'school');
1 rij is aangemaakt.
ual303@ORKDEV01> insert into c values ('col_to_be_coded_forb', 20, 'hospital');
1 rij is aangemaakt.
ual303@ORKDEV01> -- meaning 'active' for table a, column col_to_be_coded_fora, can go in
ual303@ORKDEV01> insert into a(col_to_be_coded_fora) values ( 1);
1 rij is aangemaakt.
ual303@ORKDEV01> -- meaning nothing for table a, column col_to_be_coded_fora, must give error
ual303@ORKDEV01> insert into a(col_to_be_coded_fora) values (10);
insert into a(col_to_be_coded_fora) values (10)
FOUT in regel 1:
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ual303@ORKDEV01> -- meaning nothing for table b, column col_to_be_coded_forb, must give error
ual303@ORKDEV01> insert into b(col_to_be_coded_forb) values ( 1);
insert into b(col_to_be_coded_forb) values ( 1)
FOUT in regel 1:
.ORA-02291: integrity constraint (UAL303.SYS_C0033540) violated - parent key not found
ual303@ORKDEV01> -- meaning 'school' for table b, column col_to_be_coded_fora, can go in
ual303@ORKDEV01> insert into b(col_to_be_coded_forb) values (10);
1 rij is aangemaakt.
ual303@ORKDEV01>Cheers,
Colin

Is it possible to create a formula that converts a resource hours into full time units in project server 2010

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JTC
JAckson T. Cole, PMP, MCITP

How to create hidden column in Oracle Table

Hi folks
i have one doubt regarding hidden column creation in Oracle Table..
Let me briefly explain my requirements.
I have one table called UWRMC_MAST is table contain the following columns
        RMC_N_ID           NUMBER(10)                    NOT NULL,
     COB_N_ID           NUMBER(2)                      NOT NULL,
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when ever i update the effective date that date should be insert into Old_EFFECT_D_DT i.e., Virtual Column
For example
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2 set EFFECT_D_DT = '01-apr-2011'
3 where rmc_n_id =46;
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But i want a result like below
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Regards
Arun

Arun wrote:
Hi Mr.David_Aldridge
Am having the doubt that's why i posted my quires in oracle forums.. just i want to know whether my requirement suit for VIRTUAL COLUMN in Table.
Regards,
ArunWell, I'm not sure exactly what your requirement is.
If you want to audit changes to the records of that table then it would be better to use Oracle's auditing facility. If this previous change date is really a required part of your actual application functionality then you might use the application itself to maintain the previous date as a column in the table, as you say, or if you need to maintain the history of changes then add a new table so you can keep track of multiple changes.

Is it possible to create materialized view log file for force refresh

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But there is workaround.
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Is it possible to create a column in runtime?

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