SQL describe command not running in JSP

Question

Hello All,
i hope u all will be enjoying ur lives :)
i have a problem that when i run the SQL describe command it gives me the error that Invalid SQL Statement...
the command syntax is
desc tablename; OR describe tablename;
and i am doing it like that
ResultSet rs = stmt.executeQuery("describe CF");
where CF is the name of table..
actually what i want to do is get the columns and its datatypes dynamically.. means that i want i get all the tables first from database then whichever table i select i can display its records and also add delete and modify the records...
if anyone have already code of this ..please email me at
[email protected]
i will be very very thank ful for that..
otherwise tell me the solution of the above problem :(
thanx in advance
RANA

Answer 1

You can get all the information about the table using the meta data. Run a dummy query (I don't think it even needs to return any results), and then grab the meta data
from the result set:
ResultSet rs = null;
ResultSetMetaData rsmd;
int numcolumns = 0;
Vector field = new Vector();
rs = statement.executeQuery( "select * from mytable where field='nevermatchme'");
rsmd = rs.getMetaData();
numcolumns = rsmd.getColumnCount();
for ( int i = 1 ; i <= numcolumns ; i++ ) {
field.add( rsmd.getColumnName(i) );
You now have a Vector with one element per database field, each containing a String of that fields name. I believe it is also possible to get field
type, etc also the MetaData.