我有一个表 A。我通过用户界面将数据插入到表 A 中。表 A 有一个使用序列生成的 ID（主键）和 16 个其他列。其中一列称为 cntrct_no。
当我尝试通过 UI 向表中插入数据时，它第一次运行良好。我检查了表 A，所有数据都在那里。
但是，当我尝试在不更改任何内容的情况下再次插入相同的数据时，看起来数据正在添加到表中并且我没有收到任何错误。但是当我检查表A时，第二次插入的数据不存在。
如果我尝试通过 SQL 开发人员直接插入相同的数据，则数据会插入到表中。
奇怪的是，如果我只是在 UI 中更改 cntrct_no 的值并使其余数据保持不变，则数据会被插入。
任何人都可以向我解释可能导致这种情况的原因吗？
不确定这是否有帮助：stmt.executeUpdate(); 未插入数据时返回 0，插入时返回 1。
public void writeToAudit(String contractNo, String tripNo,
String tripEffDate,
String tripDiscDate, String transpModeId, String userId,
String transType, AplLeg[] legs) {
final Session session = HibernateUtil.getSession();
Connection con = null;
con = session.connection();
PreparedStatement stmt = null;
PreparedStatement stmtSelId = null;
ResultSet rs = null;
long nextId = -1;
int i=0;
try {
for(i=0;i<legs.length;i++) {
String sqlNextId = "SELECT rpt_audit_transportation_seq.NEXTVAL as seqval FROM DUAL";
stmtSelId = con.prepareStatement(sqlNextId, ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
rs = stmtSelId.executeQuery();
rs.last();
final int rows = rs.getRow();
if (rows == 0){
nextId = -1;
}
rs.beforeFirst();
rs.next();
nextId = rs.getInt(1);
if(nextId==-1)
throw new SQLException("Cannot get next val from rpt_audit_transportation sequence.");
stmt = con.prepareStatement(WRITE_TO_AUDIT_DML);
stmt.setLong(1, nextId);
stmt.setString(2, userId.toUpperCase());
stmt.setString(3, transType);
stmt.setString(4, contractNo);
stmt.setString(5, tripNo);
stmt.setInt(6, Integer.parseInt(transpModeId));
stmt.setString(7, tripEffDate);
stmt.setString(8, tripDiscDate);
stmt.setLong(9, legs[i].getLegId().longValue());
int temp = stmt.executeUpdate();
con.commit();
}
stmt.close();
}
catch (Exception e) {
}
finally {
closeConnection(session, con, stmtSelId, rs);
}
}
SQL 语句：
private static final String WRITE_TO_AUDIT_DML =
"INSERT INTO rpt_audit_transportation " +
"(audit_id, audit_date, audit_process, audit_userid, " +
"audit_trans_type, audit_route_no, audit_trip_no, " +
"audit_eff_dt, audit_disc_dt, audit_orig_facility_id, " +
"audit_dest_facility_id, audit_arvl_tm, audit_dprt_tm, " +
"audit_leg_seq_no, audit_freq_id, audit_trnsp_mode_id) " +
"(SELECT ?, " + // audit id
"SYSDATE, " +
"'TOPS_UI', " +
"?, " + // userId
"?, " +
"rte.cntrct_no, " +
"trp.trip_no, " +
"rte.cntrct_eff_dt, " +
"rte.cntrct_disc_dt, " +
"NVL(leg.orig_facility_id, trp.orig_fac_id), " +
"NVL(leg.dest_facility_id, trp.dest_fac_id), " +
"NVL(leg.arvl_tm, trp.arvl_tm), " +
"NVL(leg.dprt_tm, trp.dprt_tm), " +
"leg.leg_seq, " +
"trp.freq_id, " +
"rte.trnsp_mode_id " +
"FROM apl_contract rte, " +
"apl_trip trp, " +
"apl_leg leg " +
"WHERE rte.cntrct_no = ? " + // contract id
"AND trp.trip_no = ? " + // trip no
"AND rte.trnsp_mode_id = ? " + // transp mode id
"AND rte.cntrct_locked_ind = 'N' " +
"AND trp.trip_eff_dt = to_date(?,'MM/DD/YYYY') " + // trip eff date
"AND trp.trip_disc_dt = to_date(?,'MM/DD/YYYY') " + // trip disc date
"AND trp.cntrct_id = rte.cntrct_id " +
"AND leg.trip_id = trp.trip_id " +
"AND leg.leg_id = ?) ";