Description:
Through esProc JDBC, search for and execute a program file locally. If not found, then search the server.
Syntax:
dfx (…)
Note:
Pass in the parameter … and call the cellset file dfx waiting to be executed. Firstly, locate the cellset file with relative searching path for execution. If not found, then search the server (The server list is configured in raqsoftConfig.xml file). Once the computation is completed in esProc or server, return a sequence composed of members of the result set; if there are multiple result sets, then return a sequence composed of these result sets. dfx (…) can be regarded as the simple notation of call dfx(…), which is executed with st.executeQuery() and returns a result set.
Parameter:
|
dfx |
Cellset file, with relative addressing path or absolute path |
|
… |
Input parameter. Use comma to separate if there are multiple ones. These parameters will be assigned to the parameters specified in the query statement in their order, rather than according to the latter’s names. |
Example:
C: \\test.dfx cellset file has the following contents, in which StuId and Class is the cellset parameters.
|
|
A |
|
1 |
=connect("demo") |
|
2 |
=A1.query("select * from SCORES where STUDENTID=? and CLASS=?",StuId,Class) |
|
3 |
=A2.sum(SCORE) |
|
4 |
>A1.close() |
|
5 |
return A3 |
Here’s the test code:
public void testDataServer() {
Connection con = null;
java.sql.PreparedStatement st;
try{
Class.forName("com.esproc.jdbc.InternalDriver");
con= DriverManager.getConnection("jdbc:esproc:local://");
// Call the stored procedure in which test is the name of dfx file
st =con.prepareCall("test ?,?");
// Set the first parameter
st.setObject(1,"4");
// Set the second parameter
st.setObject(2,"Class one");
// Execute stored procedure
st.execute();
// Get result set
ResultSet set = st.getResultSet();
// Print results
printRs(set);
// The following statement gets same result as the above-mentioned calling method has
st =con.prepareCall("test 4,\"Class one\"");
st.execute();
set = st.getResultSet();
printRs(set);
}
catch(Exception e){
System.out.println(e);
}
finally{
// Close the connection
if (con!=null) {
try {
con.close();
}
catch(Exception e) {
System.out.println(e);
}
}
}
}