Re: I have a problem of abstraction...

Alfredo,

No, once you open the connection in v2 it stays in v2.

Dave
On 6-Oct-05, at 10:49 AM, Alfredo Rico wrote:

> Thanks Dave, but could I switch to v2 just when I need it and then
> back to v3 afterwards whitout open a new connection ?
> I can't use more than one connection per user becaues I'm using a
> pool conection.
> Besides I'm using a ResultSet to update my database and so the
> conection already were established.
>
>
> Kind Regards.-
> Alfredo Rico.
>
>
> On 10/6/05, Dave Cramer <pg(at)fastcrypt(dot)com> wrote:
> Alfredo,
>
> The simplest and quickest way is to force v2 protocol
>
> http://jdbc.postgresql.org/documentation/80/connect.html#connection-
> parameters
>
> Dave
> On 6-Oct-05, at 9:27 AM, Alfredo Rico wrote:
>
> > Hi friends, greetings.
> > Please apologize by my bad english ;-(
> >
> > I need to resolve a problem of data type abstraction using JDBC.
> >
> > In first place, please check out the following java code fragment:
> > /********************************/
> > //for each row that I want to insert
> > for(int i=1 ; i<= this.columnNumbers ; i ++)
> > {
> > this.insertColumn( columnNames[i] , columnValues[i] , i );
> >
> > }
> > /******************************/
> > In the code above, for each row that I want to insert:
> > columnNames is a String vector containing columns names for a given
> > table.
> > columnValues is a String vector containing the values for each
> > column for the same table.
> > Ok, this string vector could contain int, float, double, Date,
> > character string, I mean basic types,
> > represented as string. The reason is due to this vector is
> > fulfilled by users parameters
> > that has been sent via HttpServletRequest and method
> > request.getParameter("parameter")
> > return its values as string.
> >
> >
> > Now, please look at the following java method:
> >
> > //For each row that I want to insert:
> > public void insertColumn(String columnName, Object X , int i )
> > {
> > try{
> > if(i == 1) //only for the first column
> > this.rs.moveToInsertRow();
> >
> > this.rs.updateObject(columnName , X );
> >
> > if( i == this.columnNumber )//if all columns (for one row)
> > were updated
> > this.rs.insertRow();
> >
> > }catch(SQLException e )
> > {
> > System.out.println("Error: "+e);
> > }
> > }
> >
> >
> > Ok, if I'm using JDBC driver version 7.4 Build 216 there isn't
> > problem with the data types.
> > The method ResultSet.updateObject works perfectly inserting Int,
> > float, double, Date.
> > Evrything works very well.
> >
> > But I need use JDBC driver verion 8.0 Build 312 for another
> > reasons, and the java code above not works
> > because this version of JDBC driver is very strict about data types.
> >
> > I really need insert my data in an abstract way, I mean without
> > knowing the data types.
> > (Application requirements). I would not like to use a bulk of if
> > setences for various data types
> > according to obtained by using ResultSetMetaData.
> >
> > How could I overcome this situation ?
> >
> > Beforehand thank you very much by your help and support.
> >
> > Kind Regards.
> > Alfredo Rico.
>
>