Thread: BIGINT vs Java's long

According to the Java Language Specification,
http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.html#9151

"For long, from -9223372036854775808 to 9223372036854775807, inclusive"


Indeed, I have java code which generate random long's and println's them,
and I end up with values equal to -9223372036854775808.

I had those println's redirected to a .sql file which I ran against
psql to update some bigint columns, but I got
    ERROR:  int8 value out of range: "-9223372036854775808"

Apparently bigint's don't like that value?

Well confused, since 8 bytes should be 8 freaking bytes, I turned to JDBC.

That's when things got weird, first I tried declaring a long variable with
that value, and got a compilere error (Integer to large) or something like
that.

So I declared "long myBigint = Long.MIN_VALUE" and that compiled, but when
I tried using that value in a Statement.execute() I got the exact same
error.

Anyone know what's going on? Here's the test code, using jdbc7.0-1.2.jar:


import java.sql.*;

public class testPGSQLbigint {

    public static void main( String[] args ) {
       try {
            Class.forName("org.postgresql.Driver");
       } catch (java.lang.ClassNotFoundException e) {
            System.out.println( e );
       }

       Connection db=null;
       String url = "jdbc:postgresql:abinitio2";
       try {
            db = DriverManager.getConnection(url,"dav","");
       } catch ( SQLException e ) {
            System.err.println( e );
       }

       // the following gives a compiler error
       //long bigint = -9223372036854775808;
       long bigint = Long.MIN_VALUE;
       String sql_ = "update chembase set fp0 = "+bigint+" where id =
27948;";
       System.out.println(sql_);

       try {
            Statement st = db.createStatement();
            st.execute( sql_ );
            st.close();
       } catch ( SQLException e ) {
            System.err.println( e );
       }
    }


}



output:
$ java -classpath /opt/java/jars/jdbc7.0-1.2.jar:. "testPGSQLbigint"

update chembase set fp0 = -9223372036854775808 where id = 27948;
java.sql.SQLException: ERROR:  int8 value out of range: "-9223372036854775808"



note this runs the same in linux and win2k (using Sun's SDK)



--
Dav Coleman
http://www.danger-island.com/dav/

Well, if I try to use a bit(2048) column instead,of a bunch of bigint's,
how do I get the data from org.postgresql.jdbc2.ResultSet?

I've tried getBinaryStream() and failed, then I tried getBlob() and that
was a disaster.


byte[] buffer = new byte[8];
InputStream is = rs.getBinaryStream(1);
followed with
bytesRead = is.read(buffer, bufferIndex, 8-bufferIndex);

kept giving me the same byte over and over again (decmil value 48)

i thought this was going to be easy :)


--
Dav Coleman
http://www.danger-island.com/dav/

This looks like a postgres problem, since I get the same problem in psql

test=# update testbigint set fp0 = -9223372036854775808 where id = 1;
ERROR:  int8 value out of range: "-9223372036854775808"

Dave

-----Original Message-----
From: pgsql-jdbc-owner@postgresql.org
[mailto:pgsql-jdbc-owner@postgresql.org] On Behalf Of Dav Coleman
Sent: August 7, 2001 11:37 AM
To: pgsql-jdbc@postgresql.org
Subject: [JDBC] BIGINT vs Java's long


According to the Java Language Specification,
http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.h
tml#9151

"For long, from -9223372036854775808 to 9223372036854775807, inclusive"


Indeed, I have java code which generate random long's and println's
them, and I end up with values equal to -9223372036854775808.

I had those println's redirected to a .sql file which I ran against psql
to update some bigint columns, but I got
    ERROR:  int8 value out of range: "-9223372036854775808"

Apparently bigint's don't like that value?

Well confused, since 8 bytes should be 8 freaking bytes, I turned to
JDBC.

That's when things got weird, first I tried declaring a long variable
with that value, and got a compilere error (Integer to large) or
something like that.

So I declared "long myBigint = Long.MIN_VALUE" and that compiled, but
when I tried using that value in a Statement.execute() I got the exact
same error.

Anyone know what's going on? Here's the test code, using
jdbc7.0-1.2.jar:


import java.sql.*;

public class testPGSQLbigint {

    public static void main( String[] args ) {
       try {
            Class.forName("org.postgresql.Driver");
       } catch (java.lang.ClassNotFoundException e) {
            System.out.println( e );
       }

       Connection db=null;
       String url = "jdbc:postgresql:abinitio2";
       try {
            db = DriverManager.getConnection(url,"dav","");
       } catch ( SQLException e ) {
            System.err.println( e );
       }

       // the following gives a compiler error
       //long bigint = -9223372036854775808;
       long bigint = Long.MIN_VALUE;
       String sql_ = "update chembase set fp0 = "+bigint+" where id =
27948;";
       System.out.println(sql_);

       try {
            Statement st = db.createStatement();
            st.execute( sql_ );
            st.close();
       } catch ( SQLException e ) {
            System.err.println( e );
       }
    }


}



output:
$ java -classpath /opt/java/jars/jdbc7.0-1.2.jar:. "testPGSQLbigint"

update chembase set fp0 = -9223372036854775808 where id = 27948;
java.sql.SQLException: ERROR:  int8 value out of range:
"-9223372036854775808"



note this runs the same in linux and win2k (using Sun's SDK)



--
Dav Coleman
http://www.danger-island.com/dav/

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