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inserted data lost!

 
Greenhorn
Posts: 22
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I have encountered a very strange problem: I've inserted n lines into a table, but i can just get n-1 lines in table.


The database is Access, and driver is JDBC-ODBC Bridge, code is like this:
<pre>
in = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line, supplierId = "test";
StringTokenizer parser;
int count = 0;
while ( (line = in.readLine()) != null) {
System.out.println(line);
parser = new StringTokenizer(line, ",");
// MedId, MedCName, DemandAmount, DemandUnit, DemandPrice, ValidTime, Description
count = parser.countTokens();
if (count != 6) continue;
System.out.println("insert: " + line);
StringBuffer buf = new StringBuffer(sqlStr);
buf.append("('");
buf.append(supplierId); buf.append("','");
buf.append((String)parser.nextToken().trim()); buf.append("','"); //Medid
buf.append((String)parser.nextToken().trim()); buf.append("','"); //MedCName
buf.append((String)parser.nextToken().trim()); buf.append("','"); //SupplyAmount
buf.append((String)parser.nextToken().trim()); buf.append("','");//SupplyPrice
buf.append((String)parser.nextToken().trim()); buf.append("','");//SupplyUnit
buf.append(" ','");
buf.append(date); buf.append("',");
buf.append((String)parser.nextToken().trim()); //ValidTime
buf.append(")");
System.out.println(buf.toString());
System.out.println("insert: " + stmt.executeUpdate(buf.toString())); //return 1 to every line
}
</pre>
Who can give me answer?
 
author
Posts: 3252
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Can you give the output from your println statements? And the file line that is not being inserted?
By the way, did you consider using a PreparedStatement for this?
- Peter
 
Ranch Hand
Posts: 1879
MySQL Database Suse
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I have seen this problem extensively with certain combinations of the jdbc dbc bridge and MSAccess. Stop pulling your hair out, there are 2 workarounds to force this last record to insert:
1) Close the connection each time afterwards.
2) Do a dummy select each time afterwards. That seems to be the better one.
That means: after your last insert (not after each record) do this "trick".(after "insert into emp..." execute a query "select something from emp...) Not sure if the select has to be from the same table as the insert, but you can try it both ways
Jamie
 
Li Shangqiang
Greenhorn
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It's very strange now no problem at all. If I encountered this problem again, I'll do like what you said.
 
Greenhorn
Posts: 12
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I have experienced the same problem if I fail to close the connection when the program terminates.
 
Consider Paul's rocket mass heater.
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