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problem to get nextval of a sequence

From: Daniel Schaedler <postgres-jdbc(at)daniel(dot)schaedler(dot)name>
To: pgsql-jdbc(at)postgresql(dot)org
Subject: problem to get nextval of a sequence
Date: 2004-12-28 12:45:52
Message-ID: 41D15580.3050700@daniel.schaedler.name (view raw or flat)
Thread:
Lists: pgsql-jdbc
Hi List

I try to get the 'nextval' of a sequence:
***
   String query = "SELECT nextval('nodes_nodeid_seq')";
   pstmt = conn.prepareStatement(query);
   logger.debug("statement: " + pstmt.toString());
   ResultSet ress = pstmt.executeQuery();
   long newID = ress.getLong("nextval");  // <-- Exception
***

I get the following Exception:
***
org.postgresql.util.PSQLException: ResultSet not positioned properly, 
perhaps you need to call next.
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.checkResultSet(AbstractJdbc2ResultSet.java:2380)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.getString(AbstractJdbc2ResultSet.java:1821)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.getFixedString(AbstractJdbc2ResultSet.java:2326)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.getLong(AbstractJdbc2ResultSet.java:1935)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.getLong(AbstractJdbc2ResultSet.java:2158)
	at org.daniel.pws.store.PostgresStore.newNode(PostgresStore.java:307)
	at org.daniel.pws.store.StoreTester.main(StoreTester.java:71)
2004-12-28 13:41:57,983 - not able to get the new nodeID
****

executing the query in PostgresSQL directly works, I get the correct 
return value.
The Query itself seems to be executet, as I get other exceptions if I 
misspell the columnname (e.g.).
I'm working with Postgres-jdbc: pg80b1-1.308.jdbc3.jar and JDK 1.5.0

someone an Idea?

wishing all a Happy new Year
Daniel

Responses

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Next:From: Dave CramerDate: 2004-12-28 13:08:27
Subject: Re: problem to get nextval of a sequence
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Subject: Open connections

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