Number of columns in a resultset

Hi all,
I would like to know if it's possible to get the number of columns returned by a resultset:
conn = pool.getConnection();
cs = conn.prepareCall("{call server.procedure(?,?,?)}");
cs.setString(1, name);
cs.setString(2, string);
cs.registerOutParameter(3, OracleTypes.CURSOR);
cs.execute();
rs = (ResultSet) cs.getObject(3);
here I would like to know how many columns there are in the resultset, rs.next returns the next row but I need the columns as well.
Thanks,
A.

ResultSetMetaData rmd = rs.getMetaData();
System.out.println(rmd.getColumnCount());

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Number of Column In My Resultset ?

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Can I know the numbre of Column in my Resultset ?
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Yes, ResultSet::getColumnListMetaData() returns metadata information of the columns in the resultset. Each element in the returned vector is a MetaData object for a column, the count() of the vector gives the number of columns.
-Shankar

Number of columns of the rows in a ResultSet?

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Is there any way to get the amount of columns of the rows in a ResultSet? The values of the columns might be empty, so wasNull() wont work?
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Yes, you can see the number of columns and lots of other info, see ResultSetMetaData. Example:
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Maximum Number of Columns a ResultSet can support

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Can someone tell me what the maximum number of columns a result set can support? I'm using a cachedrowset to retrieve about 50 columns from a table and it seems to stop collecting columns after 33.
Is there a way to work around this?
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Can someone tell me what the maximum number of
columns a result set can support? I'm using a
cachedrowset to retrieve about 50 columns from a
table and it seems to stop collecting columns after
33.
33 is a suspiciously low number.
Why do you think it 'stopped'? Explain exactly how you determined this.
What are the data types of fields 30-34?
Why do you think that the java program is actually getting 50 columns?
Finally in general everything in a computer is limited. However 33/50 would be significantly below normal limits for most resources.

How to get the number of columns in a result set???

hi everyone..
i am trying to establish a servlet applet communication....
my applet send the sql query to the servlet as serialised string and then the servlet executes the query...
Since i need to pass the result back to the applet, i thaught of passing the whole reult set to the applet..but that seems to be not possible..
so i thaught of storing my result set data in a vector and then pass the vector,but the first problem that i came across is that how to get the number of colums in a result set....
so is there a way to get the number of columns in a result set...???
and also i would like to know if it possible to send my whole result set to the applet bye serialization or by any method...???
thanx in advance

You shouldn't do. It expenses resources (you should always close the ResultSet and the Statement as fast as possible). Simply gently process it into a Collection or Map of DTO's. Those are serializable.

How do you return the number of Rows in a ResultSet??

How do you return the number of Rows in a ResultSet? It's easy enough to do in the SQL query using COUNT(*) but surely JDBC provides a method to return the number of rows.
The ResultSetMetaData interface provides a method for counting the number of columns but nothing for the rows.
Thanks

No good way before JDBC2.0. u can use JDBC2.0 CachedRowSet.size() to retrieve the number of rows got by a ResultSet.

Number of columns in a table

Hi,
I am developing an application using jdbc. Is there any method which returns the number of columns in a table.
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Mallo

actually, this exact code is posted in the docs that I gave the link to:
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();Jamie

Can I know the name, type, total number of column in Record Group?

I created a record group with query dynamically.
And then populated it.
I don't know the column' count, type, name befause I get the query from user at runtime.
Can I know the name, type, total number of column in Record Group?

Unfortunately, there is no way to query the record group (RG) to get the metadata you are looking for. RGs are best used as data sources to an LOV or List Item rather than as an Array to hold the resultset of a dynamic query. For this, I would recommend you use a Collection type of construct (PL/SQL Table of Records, VArray, etc).
Craig...

Count the number of columns return in an user-input sql query

I need to do something like this
I let an user input a sql query and then execute it
assuming the sql query is always correct, it will return a Resultset
then a table will pop up to accomodate the number of columns the resultset will produce
i'm stuck at the part on how to check how many columns of data will be return in the resultset

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How to clone data with in Table with dynamic 'n' number of columns

Hi All,
I've a table with syntax,
create table Temp (id number primary key, name varchar2(10), partner varchar2(10), info varchar2(20));
And with data like
insert itno temp values (sequence.nextval, 'test', 'p1', 'info for p1');
insert into temp values (sequence.nextval, 'test', 'p2', 'info for p2');
And now, i need to clone the data in TEMP table of name 'test' for new name 'test1' and here is my script,
insert into Temp select sequence.nextval id, 'test1' name, partner, info from TEMP where name='test1';
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Edited by: pavankumargupta on Apr 30, 2009 10:37 AM

Hi,
Thanks for the quick reply.
My Scenario, is we have a Game Details table. When ever some Game get cloned, we need to add new records in to that Table for the new Game.
As, the id will be primary key, this should populate from a Sequence (in our system, we used this) and Game Name will be new Game Name. And data for other columns should be same as Parent Game.
when ever business needs changes, there will be some addition of new columns in Table.
And with the existing query,
insert into Temp (id, name, partner, info) select sequence.nextval id, 'test1' name, partner, info from TEMP where name='test'_
will successfully add new rows but new added columns will have empty data.
so, is there any way to do this, i mean, some columns with sequence values and other columns with existing values.
One way, we can do is, get ResultSet MetaData (i'm using Java), and parse the columns. prepare a query in required format.
I'm looking for alternative ways in query format in SQL.
Thanks & Regards
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Edited by: pavankumargupta on Apr 30, 2009 11:05 AM
Edited by: pavankumargupta on Apr 30, 2009 11:05 AM

Dynamic column fields of ResultSet

Hi guys,
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Ok Guys, I am attaching a small part of my code on the page below. This is the working code that I have written till now.
NOw problems with this:
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<jsp:useBean id="DataBean" scope="request" class="office.DataBean" />
<jsp:useBean id="FormBean" scope="request" class="office.FormBean" />
<%
String result = "";
DataBean.connect();
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String beta = "";
String beta1 = "";
if ((size2 == 1) && (classify[0].equals("all")))
beta = "all";
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beta = "wk_char30_4 = '" + classify[0]+ "'";
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beta = "all";
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beta1 = beta1 + "'" + classify[p] + "'" + ",";
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Employee System
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<%
}%>
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Printing with 1 additional column every time resultSet is given

I have a resultSet that will return an extra column everytime around. I want to my Printing loop(code below) to be able to print an extra column everytime the resultSet is brought back with new data. How can this be done?
do{
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}while (rs.next());

It's weird that the number of columns would grow each time you run it. It sounds like you have an oddly-arranged schema.
Anyway, what you want is the java.sql.ResultSetMetaData. Read the API docs about it. It'll tell you how many columns there are, what types they are, etc., so you can then change what you read from the results. You'll probably end up with a new nested loop inside the existing one, rather than hardcoding as you have now.

Slow conversions of Number(x) columns with getLong()

JDK 1.3
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I just discovered some OutOfMemoryErrors and will be fixing that.
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Mike

http://newsgroups.bea.com/cgi-bin/dnewsweb?cmd=article&group=weblogic.developer.interest.jdbc&item=6829&utag=
ever have one of those days where you end up talking to yourself?
mike
"Mike Reiche" <[email protected]> wrote:
>
a developer tells me the code below works with type 4 drivers, but type
2 driver
complains about hte Oracle.Type.Cursor. What
type should that be? Will java.sql.Other work?
CallableStatement cstmt = con.prepareCall(callString);
cstmt.registerOutParameter(1, OracleTypes.INTEGER);
cstmt.setLong(2, 24);
cstmt.registerOutParameter(3, OracleTypes.CURSOR);
cstmt.execute();
rs=(ResultSet)cstmt.getObject(3);

How to find the number of columns in an internal table DYNAMICALLY ?

Hi,
How to find the number of columns in an internal table DYNAMICALLY ?
Thanks and Regards,
saleem.

Hi,
you can find the number of columns and their order using
the <b>'REUSE_ALV_FIELDCATALOG_MERGE'</b>
call function 'REUSE_ALV_FIELDCATALOG_MERGE'
EXPORTING
   I_PROGRAM_NAME               = sy-repid
   I_INTERNAL_TABNAME           = 'ITAB'
   I_INCLNAME                   = sy-repid
changing
    ct_fieldcat                  = IT_FIELDCAT
EXCEPTIONS
   INCONSISTENT_INTERFACE       = 1
   PROGRAM_ERROR                = 2
   OTHERS                       = 3
if sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif
now describe your fieldcat . and find no of columns.
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Is their any limit on the number of column updates in a update statement!

Hello All,
Is their any limit on the number of columns to set in a single update statement.+
am using oracle 11g .
example :-
UPDATE FMLY SET as_comp1 = v_as_comp1 , as_comp2 = v_as_comp2, as_comp3 = v_as_comp3, as_comp4 = v_as_comp4 , as_comp5 = v_as_comp5 , perslt18 = v_perslt18 , persot64 = v_persot64 , fam_size = v_fam_size , numchild = total_children , C_AGE1 = v_c_age1, C_AGE2 = v_c_age2, C_AGE3 = v_c_age3, C_AGE4 = v_c_age4 WHERE FAMID = fmly_famid(i) ;
and also is it good practice to issue single update or multiple updates ?
example for the above update i can have multiple statements like .. does the performance matters if so which is good
UPDATE FMLY SET as_comp1 = v_as_comp1 , as_comp2 = v_as_comp2, as_comp3 = v_as_comp3, as_comp4 = v_as_comp4 , as_comp5 = v_as_comp5
WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET perslt18 = v_perslt18 , persot64 = v_persot64 , fam_size = v_fam_size
WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET numchild = total_children WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET C_AGE1 = v_c_age1, C_AGE2 = v_c_age2, C_AGE3 = v_c_age3, C_AGE4 = v_c_age4 WHERE FAMID = fmly_famid(i) ;
thanks/kumar
Edited by: kumar73 on Sep 25, 2010 8:38 AM

If you can do it in a single SQL statement then you should do that.
Here's a mantra that I found to work out pretty good:
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:73891904732164

Number of columns in a resultset

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