effizient query with jdbc
| От | Johannes Bühler |
|---|---|
| Тема | effizient query with jdbc |
| Дата | |
| Msg-id | 20051215080714.03919654@malmo.geotask.ch обсуждение исходный текст |
| Ответы |
Re: effizient query with jdbc
|
| Список | pgsql-performance |
Hi,
I have a java.util.List of values (10000) which i wanted to use for a
query in the where clause of an simple select statement. iterating
over the list and and use an prepared Statement is quite slow. Is
there a more efficient way to execute such a query. Thanks for any
help. Johannes
.....
List ids = new ArrayList();
.... List is filled with 10000 values ...
List uuids = new ArrayList();
PreparedStatement pstat = db.prepareStatement("SELECT UUID FROM
MDM.KEYWORDS_INFO WHERE KEYWORDS_ID = ?"); for (Iterator iter =
ids.iterator(); iter.hasNext();) { String id = (String) iter.next();
pstat.setString(1, id);
rs = pstat.executeQuery();
if (rs.next()) {
uuids.add(rs.getString(1));
}
rs.close();
}
...
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