From: johannesbuehler@oderbruecke.de
To: pgsql-performance@postgresql.org
Subject: effizient query with jdbc
Date: Thu, 15 Dec 2005 15:44:23 +0100
Message-ID: <200512151444.jBFEiNF25690@core.kontent.de> (raw)
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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To: pgsql-performance@postgresql.org
Cc: johannesbuehler@oderbruecke.de
Subject: Re: effizient query with jdbc
In-Reply-To: <200512151444.jBFEiNF25690@core.kontent.de>
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