Using Oracle sequence to insert log id into 2 tables from jdbc?

Question

I use the oracle sequence to insert the log id into table A as follows:

String SQL_PREP_INSERT = "INSERT INTO tableA (LOG_ID,USER_ID,EXEC_TIME) VALUES"
            + " (logid_seq.nextval, ?, ?)";

Then, having received the last inserted value,

String SQL_PREP_SEL = "SELECT max(LOG_ID) FROM tableA ";

stmt = con.prepareStatement(SQL_PREP_SEL);
stmt.execute();
ResultSet rs = stmt.getResultSet();
if (rs.next()) {
logid = rs.getInt(1);
}

And adding it to table B,

String SQL_PREP_INSERT_DETAIL = "INSERT INTO tableB (LOG_ID, RESPONSE_CODE, RESPONSE_MSG) VALUES"
                + " (?, ?)";

        stmt = con.prepareStatement(SQL_PREP_INSERT_DETAIL);
        stmt.setInt(1, logid);
        stmt.setString(2, respCode);
        stmt.setString(3, respMsg);
        stmt.execute();

Is there a way to generate a sequence in Java instead of Oracle and insert into both tables at once, instead of choosing from tableA and pasting into tableB?

Answer 1

MAX(log_id) , logid_seq.nextval. , , - log_id, , , .

, INSERT , , , logid_seq.currval INSERT. currval , , , nextval .

INSERT INTO tableB (LOG_ID, RESPONSE_CODE, RESPONSE_MSG) 
  VALUES( logid_seq.currval, ?, ? )

RETURNING INSERT. , , , currval.

Answer 2

String QUERY = "INSERT INTO students "+
               "  VALUES (student_seq.NEXTVAL,"+
               "         'Harry', '[e-mail]', '31-July-1980')";

// load oracle driver
Class.forName("oracle.jdbc.driver.OracleDriver");

// get database connection from connection string
Connection connection = DriverManager.getConnection(
        "jdbc:oracle:thin:@localhost:1521:sample", "scott", "tiger");

// prepare statement to execute insert query
// note the 2nd argument passed to prepareStatement() method
// pass name of primary key column, in this case student_id is
// generated from sequence
PreparedStatement ps = connection.prepareStatement(QUERY,
        new String[] { "student_id" });

// local variable to hold auto generated student id
Long studentId = null;

// execute the insert statement, if success get the primary key value
if (ps.executeUpdate() > 0) {

    // getGeneratedKeys() returns result set of keys that were auto
    // generated
    // in our case student_id column
    ResultSet generatedKeys = ps.getGeneratedKeys();

    // if resultset has data, get the primary key value
    // of last inserted record
    if (null != generatedKeys && generatedKeys.next()) {

        // voila! we got student id which was generated from sequence
        studentId = generatedKeys.getLong(1);
    }

}