HAVE POSTGRESQL JDBC 2.0 ??? HELPPPPPPPPPPP
i am using jdbc7.0-1.2.jar
this jdbc driver implements the jdbc 2.0 api ????
when i run this code above a \n error ocurrs
SQLEXCEPTION: this method is not yet implemented
here is the code:
stmt = con.createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
Content[] aContent = new Content[iRows];
rs.absolute(1);
while (rs.next()) {
aContent[i] = new Content(rs.getInt(1), rs.getString(2),rs.getString(3),rs.getString(4),rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),rs.getString(9),rs.getInt(10),rs.getInt(11)); i++;
}
i found where the error but i can't solve this ....
i changed the line above
stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
and it still having problem
im using java 1.4 and its features is since the 1.2 ... i am using jakarta
4.0 ....
whats is the problem ????? i cant understand ....
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PostgreSql JDBC from Red Hat Linux works on Windows not on Linux
I started using ODI from a Windows XP box in development and Beta, and was successfully connecting to and loading data from several different database platforms including a PostgreSql database. I copied the PostgreSql JDBC driver to the ODI drivers folder, set up the connection information and it worked. When I moved from Windows XP to "Red Hat Enterprise Linux AS release 4 (Nahant Update 6)", I could no longer connect to this PostgreSql database. I put the same driver jar file "postgresql-8.3-603.jdbc3.jar" in the drivers folder and used the same connection string. All of the other drivers (Oracle, MS SQL, etc.) in that driver folder work correctly on this Linux box. I can even tell ODI to connect to the PostgreSql through the agent on the Windows XP machine and it works. That suggests that the URL must be OK, but for some reason it can't connect from the Linux box. I also tried updating to the newest driver"postgresql-8.3-604.jdbc3.jar" with no success.
Any Ideas on what I may have missed?I started using ODI from a Windows XP box in development and Beta, and was successfully connecting to and loading data from several different database >>>>platforms including a PostgreSql database. I copied the PostgreSql JDBC driver to the ODI drivers folder, set up the connection information and it worked.
When I moved from Windows XP to "Red Hat Enterprise Linux AS release 4 (Nahant Update 6)", I could no longer connect to this PostgreSql database. I >>>>put the same driver jar file "postgresql-8.3-603.jdbc3.jar" in the drivers folder and used the same connection string.
All of the other drivers (Oracle, MS SQL, etc.) in that driver folder work correctly on this Linux box. I can even tell ODI to connect to the PostgreSql through >>>>the agent on the Windows XP machine and it works.
That suggests that the URL must be OK, but for some reason it can't connect from the Linux box. I also tried updating to the newest driver
"postgresql-8.3-604.jdbc3.jar" with no success.
Any Ideas on what I may have missed?Hi,
I'm having a problem in connecting to a PostGreSQL database, I was just wondering how you did it? I'm using a Windows Server 2003 R2 Standard Edition.
Thanks,
Randy -
Hi,
I am writing a Java Swing application on Suse Linux and want to add Embedded SQL to it. The application should interact with a PostgreSQL database running on my local machine. The compiler complains that it cannot find the org.postgresql package included in the code. I'm guessing the problem is that the classpath is not set properly. But when I try to add the postgresql-jdbc driver to the classpath using "export CLASSPATH=$CLASSPATH:/usr/share/pgsql/pg73b1jdbc1.jar", the program stops recognizing the other Java files it uses. How do I set the classpath up properly?
Code sample:
import java.awt.*;
import javax.swing*;
import java.sql.*;
import org.postgresql.*;
public class MyClass
public static void main (String [] args)
MyFrame frame = new MyFrame();
MyPanel panel = new MyPanel();
// more code here
MyClass.java:4: package org.postgresql does not exist
import org.postgresql.*;
^
1 error
Any help is much appreciated.
Marina.Hi, I figured it out - thanks to JimDinosaur's response, although to a different thread. I am posting a reply in case other people had the same question.
So, I had two problems: first, the package wasn't recognized; second, the rest of the Java files used by the code.
Jim suggested to use javac -classpath, listing all the directories needed, for the packages and the files. So I did, with the files directory being my current directory:
javac -classpath /usr/share/pgsql/pg73b1jdbc1.jar:. CloningGUI.java
Jim, you rock! :) -
Hello... how can i set a timeout to my PostgreSQL jdbc connections? My application cant wait the large solaris default tcp timeout....
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Installing Postgresql JDBC Driver WLS 8.1
Hi,
Can somebody explain how I install the JDBC Driver for postgresql? I have WLS
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Hi,
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BLOB support in standard postgresql jdbc driver - OutOfMemoryError
Hi all,
I have a problem with PostgreSQL and BLOBs.
Small BLOBs work, but with BLOBs of a certain size my code throws a java.lang.OutOfMemoryError.
The file I tried has about 2-3 MB.
Environment:
- PostgreSQL 7.2 on i686-pc-linux-gnu, compiled by GCC 2.96
- Mandrake 8.2
- 192 MB RAM
- blob column created as datatype "bytea" (maybe that is the problem)
- code posted below (BlobPostgresTest.java)
- console output posted below
- java command to run program:
java -verbose:gc -Xmx128m -classpath .:pgjdbc2.jar BlobPostgresTest- java version as follows from "java -version" command:
java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)do you have an idea how to solve this problem ?
Console output (including GC activities):
=========================================
java -verbose:gc -Xmx128m -classpath .:pgjdbc2.jar BlobPostgresTest
BLOB/PostgreSQL Demo started
[GC 511K->230K(1984K), 0.0163708 secs]
preparing statement
setting binary stream
[GC 402K->273K(1984K), 0.0092325 secs]
[Full GC 273K->273K(1984K), 0.0771294 secs]
[GC 4351K->4058K(4908K), 0.0046329 secs]
[Full GC 4058K->3770K(4908K), 0.0831070 secs]
[GC 4922K->4922K(6860K), 0.0009556 secs]
[Full GC 4922K->4346K(6860K), 0.0890570 secs]
[GC 6650K->6650K(7820K), 0.0011110 secs]
[Full GC 6650K->5496K(7820K), 0.1420860 secs]
[GC 10104K->10104K(14480K), 0.0012827 secs]
[Full GC 10104K->7800K(14480K), 0.1236744 secs]
[GC 17016K->17016K(24084K), 0.0015421 secs]
[Full GC 17016K->12408K(24084K), 0.1688843 secs]
[GC 30840K->30840K(43224K), 0.0020800 secs]
[Full GC 30840K->21624K(43224K), 0.2547274 secs]
[GC 76920K->74616K(81500K), 0.0041685 secs]
[Full GC 74616K->49272K(81500K), 0.5688448 secs]
[GC 67704K->67704K(88332K), 0.0033407 secs]
[Full GC 67704K->58488K(88332K), 0.2558231 secs]
executing update
[GC 95352K->95352K(104844K), 0.0932741 secs]
[Full GC 95352K->40056K(104844K), 0.9644251 secs]
[GC 69245K->69245K(104844K), 0.0036631 secs]
[Full GC 69245K->69245K(104844K), 0.0814962 secs]
[Full GC 69245K->66324K(129728K), 1.1439123 secs]
Exception in thread "main" java.lang.OutOfMemoryError
BlobPostgresTest.java
=====================
import java.sql.*;
import java.io.*;
drop table blobdemo;
drop sequence blobdemo_id_seq;
create table blobdemo(
id serial not null primary key,
name varchar(50),
content bytea);
public final class BlobPostgresTest {
private final static String NAME = "TEST";
//private final static String FILE_NAME = "/tmp/blob/2mb.xxx";
private final static String FILE_NAME = "BlobPostgresTest.java";
public final static void main(String[] args) throws Throwable {
Connection con = null;
Statement statement = null;
PreparedStatement insertStatement = null;
ResultSet rs = null;
File file = null;
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
System.out.println("BLOB/PostgreSQL Demo started");
Class.forName("org.postgresql.Driver");
con = DriverManager.getConnection
("jdbc:postgresql://localhost/template1",
"postgres", "");
con.setAutoCommit(true);
statement = con.createStatement();
// cleanup
statement.executeUpdate("delete from blobdemo");
// file
file = new File(FILE_NAME);
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
// insert one record
System.out.println("preparing statement");
insertStatement = con.prepareStatement
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insertStatement.setString(1, NAME);
System.out.println("setting binary stream");
insertStatement.setBinaryStream(2, bis, (int)file.length());
System.out.println("executing update");
insertStatement.executeUpdate();
// retrieve
rs = statement.executeQuery
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while(rs.next()) {
System.out.println("id=" + rs.getObject(1));
System.out.println("name=" + rs.getObject(2));
byte[] bytes = rs.getBytes(3);
String content = new String(bytes);
//System.out.println(content);
System.out.println("retrieved " + bytes.length + " bytes");
} finally {
if(rs != null) rs.close();
if(statement != null) statement.close();
if(insertStatement != null) insertStatement.close();
if(con != null) con.close();
if(fis != null) fis.close();
if(bis != null) bis.close();
System.out.println("BLOB/PostgreSQL Demo complete");
}FYI: I'm in contact with the postgres team to work on the problem. it is caused by the way blobs are implemented in the jdbc driver.
http://archives.postgresql.org/pgsql-jdbc/2002-08/msg00096.php -
hi
I have downloaded and installed and built ant, but i don't know how to continue, please helptry here: http://jdbc.postgresql.org/doc.html
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PostgreSQL & JDBC - ClassNotFoundException
I'm trying to get my servlet to play nicely with postgresql, but I keep getting a ClassNotFoundException at compile time. I have added only one line (Class.forName("org.postgresql.Driver");) to a previously working servlet - it should initialize the driver as per the postgresql documentation, but it keeps throwing this error.
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Below is (the relevant part of) my code. Any help is most appreciated!
package mypackage;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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}I'm trying to get my servlet to play nicely with
postgresql, but I keep getting a
ClassNotFoundException at compile time. "at compile time" - now I see.
Putting the JAR file in the WEB-INF/lib of your app or Tomcat's common/lib only affects runtime behavior. At compile time you have to tell the compiler where to find what you need.
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How to have remote jdbc connection to timeten?
I think our admin have set up a timeten daemon , can I connect it remotely using JDBC connection? How the connection should be? Is it like
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SAP BI 4.0 SP2 on Linux and Postgresql Datasource via JDBC drivers
Hi,
I installed SAP BI Platform 4.0 SP2 on Redhat 5.2 and i try to access as a universe datasource a postgresql database (v8.4). But i don't know how to configure the postgresql JDBC driver on linux server.
does anyone have a step by step procedure to configure this JDBC postgresql driver on linux ?
I download this driver : http://jdbc.postgresql.org/download/postgresql-8.4-703.jdbc3.jar
I read the SAP Data Access document for SAP BI 4.0 SP2 about JDBC connexions, they talk about a SBO file located in $ROOT_DIR/sap_bobj/enterprise_xi40/dataAccess/connectionServer/jdbc , but there isn't any SBO file for postgresql database ?
Thanks in advance
JP
Edited by: Jean-Philippe ARNALOT on Oct 6, 2011 6:58 PMHi
I found a solution alone, this note 1347514 helps me :
My conf : Redhat 5.2 + SAP BI 4.0 SP2 + postgresql 8.4 datasource + jdbc drivers
My solution :
1) Download JDBC drivers on client side (http://jdbc.postgresql.org/download/postgresql-8.4-703.jdbc3.jar)
2) Create and export a JDBC connexion for postgresql8
3) Create and export a universe using this connexion (test a query in universe design tool tools/Querybuilder)
4) install JDBC drivers on server side, i copied the jar file in this location : $ROOT_DIR/sap_bobj/enterprise_xi40/dataAccess/connectionServer/drivers/java/postgresql-8.4-703.jdbc3.jar
5) Set your classpath in your .profile : CLASSPATH=$CLASSPATH:/export/logiciels/tes-boxi/sap_bobj/enterprise_xi40/dataAccess/connectionServer/drivers/java/postgresql-8.4-703.jdbc3.jar; export CLASSPATH
6) Source your .profile
7) Restart servers (i think restarting only webi server would be ok)
8) Open BI LaunchPad, start Webi and execute a query on postgresql universe
It Works with my configuration
Thanks for your help
JP -
OS - Linux
SunAppServ 9.1
Hi, I want to create in AdminPanel on 4848 port new ConnectionPool in Resources/JDBC.
To do this I can chose Postgres Vendor but I want to use my new Postgres driver because default is not work.
I hava postgresql-8.2-505.jdbc4.jar file
in this file there is a directories org/postgresql/ds/PGPoolingDataSource.class which I want to use.
Where I should copy this postgresql-8.2...jar file
I tried copy to JEE5_HOME/lib/. and in secend step i write class postgresql-8.2-505.jdbc4.org.postgresql.ds.PGPoolingDataSource
but this doesn't work.
BTW this driver work in NetBeans (I have jdbc connection in Runtime and linked this driver)Please Refer :
1) http://blogs.sun.com/JagadishPrasath/entry/creating_jdbc_connection_pool_resource
2) http://blogs.sun.com/JagadishPrasath/entry/jdbc_connection_pool_templates_glassfish -
Intalling Postgresql in solaris 10
I have downloaded the postgresql package from
www.postgresql.org/download/bittorent
i have unziped the files. i dont know how to continue with the installation.Here is some documentation to get you started......It available online.
Author : Chris Drawater
Date
: May 2005
Version : 1.2
PostgreSQL 8.0.02 for J2EE applications on Solaris 10
Abstract
Advance planning enables PostgreSQL 8 and its associated JDBC driver to be quickly deployed in a
basic but resilient and IO efficient manner.
Minimal change is required to switch JDBC applications from Oracle to PostgreSQL.
Document Status
This document is Copyright � 2005 by Chris Drawater.
This document is freely distributable under the license terms of the GNU Free Documentation License
(http://www.gnu.org/copyleft/fdl.html). It is provided for educational purposes only and is NOT
supported.
Introduction
This paper documents how to deploy PostgreSQL 8 and its associated JDBC driver in a basic but both
resilient and IO efficient manner. Guidance for switching from Oracle to PostgreSQL is also provided.
It is based upon experience with the following configurations =>
PostgreSQL 8.0.2 on Solaris 10
PostgreSQL JDBC driver on Windows 2000
using the PostgreSQL distributions =>
postgresql-base-8.0.2.tar.gz
postgresql-8.0-311.jdbc3.jar
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p1/10
Page 2
Background for Oracle DBAs
For DBAs coming from an Oracle background, PostgreSQL has a number of familiar concepts including
Checkpoints
Tablespaces
MVCC concurrency model
Write ahead log (WAL)+ PITR
Background DB writer
Statistics based optimizer
Recovery = Backup + archived WALs + current WALs
However , whereas 1 Oracle instance (set of processes) services 1 physical database, PostgreSQL differs in
that
1 PostgreSQL �cluster� services n * physical DBs
1 cluster has tablespaces (accessible to all DBs)
1 cluster = 1 PostgreSQL instance = set of server processes etc ( for all DBs) + 1 tuning config +
1 WAL
User accts are cluster wide by default
There is no undo or BI file � so to support MVCC, the �consistent read� data is held in the tables
themselves and once obsolete needs to be cleansed out using the �vacuum� utility.
The basic PostgreSQL deployment guidelines for Oracle aware DBAs are to =>
Create only 1 DB per cluster
Have 1 superuser per cluster
Let only the superuser create the database
Have one user to create/own the DB objects + n* endusers with appropriate read/write access
Use only ANSI SQL datatypes and DDL.
Wherever possible avoid DB specific SQL extensions to ensure cross-database portability
IO distribution & disc layouts
It is far better to start out with good disc layouts rather than reto-fix for a production database.
As with any DBMS, for resilience, the recovery components ( eg. backups , WAL, archived WAL logs)
should kept on devices separate from the actual data.
So the basic rules for resilience are as follows.
For non disc array or JBOD systems =>
keep recovery components separate from data on dedicated discs etc
keep WAL and data on separate disc controllers
mirror WAL across discs ( preferably across controllers) for protection against WAL spindle loss
For SAN based disc arrays (eg HP XP12000) =>
keep recovery components separate from data on dedicated LUNs etc
use Host Adapter Multipathing drivers (such as mpxio) with 2 or more HBAs for access to SAN .
Deploy application data on mirrored/striped (ie RAID 1+0) or write-cache fronted RAID 5 storage.
The WAL log IO should be configured to be osync for resilience (see basic tuning in later section).
Ensure that every PostgreSQL component on disc is resilient (duplexed) !
Recovery can be very stressful�
Moving onto IO performance, it is worth noting that WAL IO and general data IO access have different IO
characteristics.
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p2/10
Page 3
WAL sequential access (write mostly)
Data sequential scan, random access write/read
The basic rules for good IO performance �.
use tablespaces to distribute data and thus IO across spindles or disc array LUNs
keep WAL on dedicated spindles/LUNs (mirror/stripe in preference to RAID 5)
keep WAL and arch WAL on separate spindles to reduce IO on WAL spindles.
RAID or stripe data across discs/LUNs in 1 Mb chunks/units if unsure as what chunk size to use.
For manageability, keep the software distr and binaries separate from the database objects.
Likewise, keep the system catalogs and non-application data separate from the application specific data.
5 distinct storage requirements can be identified =>
Software tree (Binaries, Source, distr)
Shared PG sys data
WAL logs
Arch WAL logs
Application data
For the purposes of this document , the following minimal set of FS are suggested =>
/opt/postgresql/8.0.2
# default 4 Gb for software tree
/var/opt/postgresql
# default 100 Mb
/var/opt/postgresql/CLUST/sys
# default size 1Gb for shared sys data
/var/opt/postgresql/CLUST/wal
# WAL location # mirrored/striped
/var/opt/postgresql/CLUST/archwal
# archived WALs
/var/opt/postgresql/CLUST/data
# application data + DB sys catalogs # RAID 5
where CLUST is your chosen name for the Postgres DB cluster
For enhanced IO distribution , a number of �/data FS (eg data01, data02 etc) could be deployed.
Pre-requisites !
The GNU compiler and make software utilities (available on the Solaris 10 installation CDs) =>
gcc (compiler) ( $ gcc --version => 3.4.3 )
gmake (GNU make)
are required and should be found in
/usr/sfw/bin
Create the Unix acct
postgres
in group dba
with a home directory of say /export/home/postgresql
using
$ useradd utility
or hack
/etc/group then /etc/passwd then run pwconv and then passwd postgres
Assuming the following FS have been created =>
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p3/10
Page 4
/opt/postgresql/8.0.2
# default 4 Gb for the PostgreSQL software tree
/var/opt/postgresql
# default 100 Mb
create directories
/opt/postgresql/8.0.2/source
# source code
/opt/postgresql/8.0.2/distr
# downloaded distribution
all owned by user postgres:dba with 700 permissions
To ensure, there are enough IPC resources to use PostgreSQL, edit /etc/system and add the following lines
=>
set shmsys:shminfo_shmmax=1300000000
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=200
set shmsys:shminfo_shmseg=20
set semsys:seminfo_semmns=800
set semsys:seminfo_semmni=70
set semsys:seminfo_semmsl=270 # defaults to 25
set rlim_fd_cur=1024
# per process file descriptor soft limit
set rlim_fd_max=4096
# per process file descriptor hard limit
Thenn on the console (log in as root) =>
$ init 0
{a} ok boot -r
Download Source
Download the source codes from http://www.postgresql.org (and if downloaded via Windows, remember
to ftp in binary mode) =>
Distributions often available include =>
postgresql-XXX.tar.gz => full source distribution.
postgresql-base-XXX.tar.gz => Server and the essential client interfaces
postgresql-opt-XXX.tar.gz => C++, JDBC, ODBC, Perl, Python, and Tcl interfaces, as well as multibyte
support
postgresql-docs-XXX.tar.gz => html docs
postgresql-test-XXX.tar.gz => regression test
For a working, basic PostgreSQL installation supporting JDBC applications, simply use the �base�
distribution.
Create Binaries
Unpack Source =>
$ cd /opt/postgresql/8.0.2/distr
$ gunzip postgresql-base-8.0.2.tar.gz
$ cd /opt/postgresql/8.0.2/source
$ tar -xvof /opt/postgresql/8.0.2/distr/postgresql-base-8.0.2.tar
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p4/10
Page 5
Set Unix environment =>
TMPDIR=/tmp
PATH=/usr/bin:/usr/ucb:/etc:.:/usr/sfw/bin:usr/local/bin:n:/usr/ccs/bin:$PATH
export PATH TMPDIR
Configure the build options =>
$ cd /opt/postgresql/8.0.2/source/postgresql-8.0.2
$ ./configure prefix=/opt/postgresql/8.0.2 with-pgport=5432 --without-readline
CC=/usr/sfw/bin/gcc
Note => --enable-thread-safety option failed
And build =>
$ gmake
$ gmake install
On an Ultra 5 workstation, this gives 32 bit executables
Setup Unix environment
Add to environment =>
LD_LIBRARY_PATH=/opt/postgresql/8.0.2/lib
PATH=/opt/postgresql/8.0.2/bin:$PATH
export PATH LD_LIBRARY_PATH
Create Database(Catalog) Cluster
Add to Unix environment =>
PGDATA=/var/opt/postgresql/CLUST/sys
# PG sys data , used by all DBs
export PGDATA
Assuming the following FS has been created =>
/var/opt/postgresql/CLUST/sys
# default size 1Gb
where CLUST is your chosen name for the Postgres DB cluster,
initialize database storage area, create shared catalogs and template database template1 =>
$ initdb -E UNICODE -A password
-W
# DBs have default Unicode char set, user basic passwords, prompt for super user password
Startup, Shutdown and basic tuning of servers
Check servers start/shutdown =>
$ pg_ctl start -l /tmp/logfile
$ pg_ctl stop
Next, tune the PostgreSQL instance by editing the configuration file $PGDATA/postgresql.conf .
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p5/10
Page 6
First take a safety copy =>
$ cd $PGDATA
$ cp postgresql.conf postgresql.conf.orig
then make the following (or similar changes) to postgresql.conf =>
# listener
listen_addresses = 'localhost'
port = 5432
# data buffer cache
shared_buffers = 10000
# each 8Kb so depends upon memory available
#checkpoints
checkpoint_segments = 3
# default
checkpoint_timeout = 300
# default
checkpoint_warning = 30
# default � logs warning if ckpt interval < 30s
# log related
fsync = true
# resilience
wal_sync_method = open_sync
# resilience
commit_delay = 10
# group commit if works
archive_command = 'cp "%p" /var/opt/postgresql/CLUST/archwal/"%f"'
# server error log
log_line_prefix = '%t :'
# timestamp
log_min_duration_statement = 1000
# log any SQL taking more than 1000ms
log_min_messages = info
#transaction/locks
default_transaction_isolation = 'read committed'
Restart the servers =>
$ pg_ctl start -l /tmp/logfile
Create the Database
This requires the FS =>
/var/opt/postgresql/CLUST/wal
# WAL location
/var/opt/postgresql/CLUST/archwal
# archived WALs
/var/opt/postgresql/CLUST/data
# application data + DB sys catalogs
plus maybe also =>
/var/opt/postgresql/CLUST/backup
# optional for data and config files etc as staging
area for tape
Create the clusterwide tablespaces (in this example, a single tablespace named �appdata�) =>
$ psql template1
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p6/10
Page 7
template1=# CREATE TABLESPACE appdata LOCATION '/var/opt/postgresql/CLUST/data';
template1=# SELECT spcname FROM pg_tablespace;
spcname
pg_default
pg_global
appdata
(3 rows)
and add to the server config =>
default_tablespace = 'appdata'
Next, create the database itself (eg name = db9, unicode char set) =>
$ createdb -D appdata -E UNICODE -e db9
# appdata = default TABLESPACE
$ createlang -d db9 plpgsql
# install 'Oracle PL/SQL like' language
WAL logs are stored in the directory pg_xlog under the data directory. Shut the server down & move the
directory pg_xlog to /var/opt/postgresql/CLUST/wal and create a symbolic link from the original location in
the main data directory to the new path.
$ pg_ctl stop
$ cd $PGDATA
$ mv pg_xlog /var/opt/postgresql/CLUST/wal
$ ls /var/opt/postgresql/CLUST/wal
$ ln -s /var/opt/postgresql/CLUST/wal/pg_xlog $PGDATA/pg_xlog
# soft link as across FS
$ pg_ctl start -l /tmp/logfile
Assuming all is now working OK, shutdown PostgreSQL & backup up all the PostgreSQL related FS
above� just in case�!
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p7/10
Page 8
User Accounts
Create 1 * power user to create/own/control the tables (using psql) =>
$ pgsql template1
create user cxd with password 'abc';
grant create on tablespace appdata to cxd;
Do not create any more superusers or users that can create databases!
Now create n* enduser accts to work against the data =>
$pgsql template1
CREATE GROUP endusers;
create user enduser1 with password 'xyz';
ALTER GROUP endusers ADD USER enduser1;
$ psql db9 cxd
grant select. on <table>. to group endusers;
JDBC driver
A pure Java (Type 4) JDBC driver implementation can be downloaded from
http://jdbc.postgresql.org/
Assuming the use of the SDK 1.4 or 1.5, download
postgresql-8.0-311.jdbc3.jar
and include this in your application CLASSPATH.
(If moving JAR files between different hardware types, always ftp in BIN mode).
Configure PostgreSQL to accept JDBC Connections
To allow the postmaster listener to accept TCP/IP connections from client nodes running the JDBC
applications, edit the server configuration file and change
listen_addresses = '*'
# * = any IP interface
Alternatively, this parameter can specify only selected IP interfaces ( see documentation).
In addition, the client authetication file will need to edited to allow access to our database server.
First take a backup of the file =>
$ cp pg_hba.conf pg_hba.conf.orig
Add the following line =>
host db9
cxd
0.0.0.0/0
password
where , for this example, database db9, user cxd, auth password
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p8/10
Page 9
Switching JDBC applications from Oracle to PostgreSQL
The URL used to connect to the PostgreSQL server should be of the form
jdbc:postgresql://host:port/database
If used, replace the line (used to load the JDBC driver)
Class.forName ("oracle.jdbc.driver.OracleDriver");
with
Class.forName("org.postgresql.Driver");
Remove any Oracle JDBC extensions, such as
((OracleConnection)con2).setDefaultRowPrefetch(50);
Instead, the row pre-fetch must be specified at an individual Statement level =>
eg.
PreparedStatement pi = con1.prepareStatement(�select�.�);
pi.setFetchSize(50);
If not set, the default fetch size = 0;
Likewise, any non ANSI SQL extensions will need changing.
For example sequence numbers
Oracle => online_id.nextval
should be replaced by
PostgreSQL => nextval('online_id')
Oracle �hints� embedded within SQL statements are ignored by PostgreSQL.
Now test your application!
Concluding Remarks
At this stage, you should now have a working PostgreSQL database fronted by a JDBC based application,
and the foundations will have been laid for :
A reasonably level of resilience (recoverability)
A good starting IO distribution
The next step is to tune the system under load� and that�s another doc�
Chris Drawater has been working with RDBMSs since 1987 and the JDBC API since late 1996, and can
be contacted at [email protected] or [email protected] .
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p9/10
Page 10
Appendix 1 � Example .profile
TMPDIR=/tmp
export TMPDIR
PATH=/usr/bin:/usr/ucb:/etc:.:/usr/sfw/bin:usr/local/bin:n:/usr/ccs/bin:$PATH
export PATH
# PostgreSQL 802 runtime
LD_LIBRARY_PATH=/opt/postgresql/8.0.2/lib
PATH=/opt/postgresql/8.0.2/bin:$PATH
export PATH LD_LIBRARY_PATH
PGDATA=/var/opt/postgresql/CLUST/sys
export PGDATA
� Chris Drawater, 2005
PostgreSQL 8.0.2 on Solaris, v1.2
p10/10 -
J2EE with JDeveloper and postgresql
Hi folks,
I'm creating a j2ee app (struts) with jdev with oracle9i
and this work fine...
but I have try connect with another database
(postgresql 7.4) to recovery some data
and the local container of jdev is not recognizing
the postgresql driver...
where I do to make the internal container
work with jdbc postgre driver ?To configure the the PostgreSQL JDBC driver:
1. Select Tools>Preferences in JDeveloper.
2. In the Preferences frame, select the Database Connections node. Select Library New button.
3. Select the Registered JDBC Drivers field New button.
4. In the Driver Class field specify org.postgresql.Driver
5. Select Library field New button.
6. In the Create Library frame specify a Library Name, and add the PostgreSQL JDBC jar file pg74.215.jdbc2.jar to the Class Path field.
The PostgreSQL JDBC driver library gets added to the Preferences frame. -
Dear colleagues,
We want to create a new Datasource in order to connect our Portal Application with a Postgresql DB.
We had been creating Datasources with Oracle before and everything was ok , but with Postgresql we are
experiencing some problems.
Firstly, we created a new jdbc driver in visual administrator console.
Secondly, we were trying to create a new datasource using the Postgresql driver but finished with error.
I would appreciate if someone have a clue to solve our problem.
Thanks in advance.
Oscar
This is a piece of error dump.
java.rmi.RemoteException: com.sap.engine.services.dbpool.exceptions.BaseRemoteException: Error during start of application "sap.com/JDBCConnector_DS_POST.xml". [id = StartupError]
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.startApplication(DataSourceManagerImpl.java:608)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.deploy(DataSourceManagerImpl.java:285)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.createDataSource(DataSourceManagerImpl.java:342)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sap.pj.jmx.introspect.DefaultMBeanInvoker.invoke(DefaultMBeanInvoker.java:58)
at com.sap.pj.jmx.mbeaninfo.AdditionalInfoProviderMBean.invoke(AdditionalInfoProviderMBean.java:289)
at com.sap.pj.jmx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:944)
at com.sap.pj.jmx.server.interceptor.MBeanServerWrapperInterceptor.invoke(MBeanServerWrapperInterceptor.java:288)
at com.sap.engine.services.jmx.CompletionInterceptor.invoke(CompletionInterceptor.java:409)
at com.sap.pj.jmx.server.interceptor.BasicMBeanServerInterceptor.invoke(BasicMBeanServerInterceptor.java:277)
at com.sap.jmx.provider.ProviderInterceptor.invoke(ProviderInterceptor.java:258)
at com.sap.engine.services.jmx.RedirectInterceptor.invoke(RedirectInterceptor.java:340)
at com.sap.pj.jmx.server.interceptor.MBeanServerInterceptorChain.invoke(MBeanServerInterceptorChain.java:330)
at com.sap.engine.services.jmx.MBeanServerSecurityWrapper.invoke(MBeanServerSecurityWrapper.java:287)
at com.sap.engine.services.jmx.MBeanServerInvoker.invokeMbs(MBeanServerInvoker.java:131)
at com.sap.engine.services.jmx.ClusterInterceptor.invokeMbs(ClusterInterceptor.java:212)
at com.sap.engine.services.jmx.ClusterInterceptor.invoke(ClusterInterceptor.java:766)
at com.sap.engine.services.jmx.MBeanServerInterceptorInvoker.invokeMbs(MBeanServerInterceptorInvoker.java:102)
at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImpl.invokeMbs(P4ConnectorServerImpl.java:61)
at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImplp4_Skel.dispatch(P4ConnectorServerImplp4_Skel.java:64)
at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:319)
at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:200)
at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:136)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:104)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)
Caused by: java.rmi.RemoteException: Error occurred while starting application in whole cluster and wait.; nested exception is:
com.sap.engine.services.deploy.exceptions.ServerDeploymentException: Clusterwide exception: server ID 6280550:com.sap.engine.services.dbpool.exceptions.BaseDeploymentException: Cannot create DataSource "DS_POST".
at com.sap.engine.services.dbpool.deploy.ContainerImpl.startDataSources(ContainerImpl.java:1843)
at com.sap.engine.services.dbpool.deploy.ContainerImpl.prepareStart(ContainerImpl.java:489)
at com.sap.engine.services.deploy.server.application.StartTransaction.prepareCommon(StartTransaction.java:223)
at com.sap.engine.services.deploy.server.application.StartTransaction.prepare(StartTransaction.java:171)
at com.sap.engine.services.deploy.server.application.ApplicationTransaction.makeAllPhasesOnOneServer(ApplicationTransaction.java:301)
at com.sap.engine.services.deploy.server.application.ParallelAdapter.makeAllPhasesImpl(ParallelAdapter.java:342)
at com.sap.engine.services.deploy.server.application.ParallelAdapter.runInTheSameThread(ParallelAdapter.java:126)
at com.sap.engine.services.deploy.server.application.ParallelAdapter.makeAllPhasesAndWait(ParallelAdapter.java:245)
at com.sap.engine.services.deploy.server.DeployServiceImpl.startApplicationAndWait(DeployServiceImpl.java:4712)
at com.sap.engine.services.deploy.server.DeployCommunicatorImpl.startApplicationAndWait(DeployCommunicatorImpl.java:661)
at com.sap.engine.services.deploy.server.DeployCommunicatorImpl.startApplicationAndWait(DeployCommunicatorImpl.java:645)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.startApplication(DataSourceManagerImpl.java:606)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.deploy(DataSourceManagerImpl.java:285)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.createDataSource(DataSourceManagerImpl.java:342)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sap.pj.jmx.introspect.DefaultMBeanInvoker.invoke(DefaultMBeanInvoker.java:58)
at com.sap.pj.jmx.mbeaninfo.AdditionalInfoProviderMBean.invoke(AdditionalInfoProviderMBean.java:289)
at com.sap.pj.jmx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:944)
at com.sap.pj.jmx.server.interceptor.MBeanServerWrapperInterceptor.invoke(MBeanServerWrapperInterceptor.java:288)
at com.sap.engine.services.jmx.CompletionInterceptor.invoke(CompletionInterceptor.java:409)
at com.sap.pj.jmx.server.interceptor.BasicMBeanServerInterceptor.invoke(BasicMBeanServerInterceptor.java:277)
at com.sap.jmx.provider.ProviderInterceptor.invoke(ProviderInterceptor.java:258)
at com.sap.engine.services.jmx.RedirectInterceptor.invoke(RedirectInterceptor.java:340)
at com.sap.pj.jmx.server.interceptor.MBeanServerInterceptorChain.invoke(MBeanServerInterceptorChain.java:330)
at com.sap.engine.services.jmx.MBeanServerSecurityWrapper.invoke(MBeanServerSecurityWrapper.java:287)
at com.sap.engine.services.jmx.MBeanServerInvoker.invokeMbs(MBeanServerInvoker.java:131)
at com.sap.engine.services.jmx.ClusterInterceptor.invokeMbs(ClusterInterceptor.java:212)
at com.sap.engine.services.jmx.ClusterInterceptor.invoke(ClusterInterceptor.java:766)
at com.sap.engine.services.jmx.MBeanServerInterceptorInvoker.invokeMbs(MBeanServerInterceptorInvoker.java:102)
at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImpl.invokeMbs(P4ConnectorServerImpl.java:61)
at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImplp4_Skel.dispatch(P4ConnectorServerImplp4_Skel.java:64)
at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:319)
at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:200)
at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:136)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:104)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)
Caused by: com.sap.engine.services.dbpool.exceptions.BaseInstantiationException: Cannot create instance ManagedConnectionFactoryImpl.
at com.sap.engine.services.dbpool.spi.ManagedConnectionFactoryImpl.<init>(ManagedConnectionFactoryImpl.java:83)
at com.sap.engine.services.dbpool.deploy.ContainerImpl.startDataSources(ContainerImpl.java:1779)
... 42 more
Caused by: java.lang.ClassNotFoundException: postgresql.jdbc.driver.PostgresqlDriver
Loader Info -
ClassLoader name: [library:postgresql.jdbc.driver.PostgresqlDriver]
Parent loader name: [Frame ClassLoader]
No references !
Resources:
/usr/sap/EPD/JC00/j2ee/cluster/server0/bin/core_lib/opensqlport.jar
/usr/sap/EPD/JC00/j2ee/cluster/server0/bin/ext/postgresql.jdbc.driver.PostgresqlDriver/postgresql-8.4-701.jdbc3.jar
Loading model: {parent,local,references}
at com.sap.engine.frame.core.load.ReferencedLoader.loadClass(ReferencedLoader.java:382)
at com.sap.engine.services.dbpool.spi.ManagedConnectionFactoryImpl.<init>(ManagedConnectionFactoryImpl.java:74)
... 43 more
at com.sap.engine.services.deploy.server.DeployCommunicatorImpl.startApplicationAndWait(DeployCommunicatorImpl.java:663)
at com.sap.engine.services.deploy.server.DeployCommunicatorImpl.startApplicationAndWait(DeployCommunicatorImpl.java:645)
at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.startApplication(DataSourceManagerImpl.java:606)
... 31 more
Caused by: com.sap.engine.services.deploy.exceptions.ServerDeploymentException: Clusterwide exception: server ID 6280550:com.sap.engine.services.dbpool.exceptions.BaseDeploymentException: Cannot create DataSource "DS_POST".
at com.sap.engine.services.dbpool.deploy.ContainerImpl.startDataSources(ContainerImpl.java:1843)
at com.sap.engine.services.dbpool.deploy.ContainerImpl.prepareStart(ContainerImpl.java:489)
at com.sap.engine.services.deploy.server.application.StartTransaction.prepareCommon(StartTransaction.java:223)
at com.sap.engine.services.deploy.server.application.StartTransaction.prepare(StartTransaction.java:171)Hi Oscar,
Your problem seems to be:
> Caused by: java.lang.ClassNotFoundException: postgresql.jdbc.driver.PostgresqlDriver
There might be different JDBC drivers for PostgreSQL, but for the one I know (http://jdbc.postgresql.org/) the driver class is: org.postgresql.Driver
Hope it helps
Detlev -
Hi,
I am new to Java Programming,and JDBC. I have installed jdbc driver for Postgresql, and is working fine. I have the following code (which I can compile, but when I run I gets many lines of error messages):
import java.io.*;
import java.sql.*;
import java.util.*;
public class ContactInput {
public static void main(String args[]) {
int serial = 2;
String name ="Patty Thapa";
String email ="[email protected]";
String homepage ="www.damars.net/~pat";
String tel = "2334 2747";
String add = "Hong kong";
String url = "jdbc:postgresql:contacts";
Connection con;
PreparedStatement pprStmt;
try {
Class.forName("org.postgresql.Driver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
try {
con = DriverManager.getConnection(url,"damar", "");
pprStmt=con.prepareStatement("INSERT INTO address(serial, name, email, homepage, telephone, postaladdress)"
+ "values(?,?,?,?,?,?)");
pprStmt.clearParameters();
pprStmt.setInt(1,serial);
pprStmt.setString(2,name);
pprStmt.setString(3,email);
pprStmt.setString(4,homepage);
pprStmt.setString(5,tel);
pprStmt.setString(6,add);
pprStmt.executeUpdate();
pprStmt.close();
con.close();
} catch(SQLException ex) {
System.err.println("SQLException: " + ex.getMessage());
Can any one please points me what I have done wrong here?
Thanks
DamarHi,
Further to my previous problem of PreparedStatement, I have the following code:
import java.sql.*;
import java.util.*;
public class AddressDisp{
public static void main(String[] args){
try{
Class.forName("org.postgresql.Driver");
catch (ClassNotFoundException e){
System.out.println("Unable to load Driver Class");
return;
try{
Connection con = DriverManager.getConnection("jdbc:postgresql:contacts","damar","");
Statement stmt=con.createStatement();
ResultSet rs = stmt.executeQuery("Select name from address");
while(rs.next()){
System.out.print(rs.getString("name"));
System.out.print(rs.getInt("ser"));
System.out.print(", " +rs.getString("email"));
System.out.print(", " + rs.getString("telephone"));
System.out.println(", " + rs.getString("postaladdress"));
rs.close();
stmt.close();
con.close();
catch(SQLException se){
System.out.println("SQL Exception : " + se.getMessage());
se.printStackTrace(System.out);
In address table, there is 6 fields namely, ser (int), name (char(20)), email (varchar(24)), homepage (varchar(25)), telephone (char(15)), postaladdress (varchar(30)). The above code works properly only with "System.out.print(rs.getString("name"))" ie I can get all names, but all other fields end up with following message:
SQL Exception : The column name ser not found.
The column name ser not found.
at 0x4017224b: java.lang.Throwable.Throwable(java.lang.String) (/usr/lib/libgcj.so.2)
at 0x4016885b: java.lang.Exception.Exception(java.lang.String) (/usr/lib/libgcj.so.2)
at 0x401e0a40: java.sql.SQLException.SQLException(java.lang.String, java.lang.String, int) (/usr/lib/libgcj.so.2)
at 0x401e09cb: java.sql.SQLException.SQLException() (/usr/lib/libgcj.so.2)
at 0x4023925f: ffi_call_SYSV (/usr/lib/libgcj.so.2)
at 0x40239227: ffi_raw_call (/usr/lib/libgcj.so.2)
at 0x4014c8db: JvInterpMethod.continue1(_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x40150703: JvInterpMethod.run(ffi_cif, void, ffi_raw, JvInterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x4014c671: JvInterpMethod.run_normal(ffi_cif, void, ffi_raw, void) (/usr/lib/libgcj.so.2)
at 0x40239114: ?? (??:0)
at 0x4023925f: ffi_call_SYSV (/usr/lib/libgcj.so.2)
at 0x40239227: ffi_raw_call (/usr/lib/libgcj.so.2)
at 0x4014c8db: JvInterpMethod.continue1(_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x40150703: JvInterpMethod.run(ffi_cif, void, ffi_raw, JvInterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x4014c671: JvInterpMethod.run_normal(ffi_cif, void, ffi_raw, void) (/usr/lib/libgcj.so.2)
at 0x40239114: ?? (??:0)
at 0x4023925f: ffi_call_SYSV (/usr/lib/libgcj.so.2)
at 0x40239227: ffi_raw_call (/usr/lib/libgcj.so.2)
at 0x4014c8db: JvInterpMethod.continue1(_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x40150703: JvInterpMethod.run(ffi_cif, void, ffi_raw, JvInterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x4014c671: JvInterpMethod.run_normal(ffi_cif, void, ffi_raw, void) (/usr/lib/libgcj.so.2)
at 0x40239114: ?? (??:0)
at 0x4023925f: ffi_call_SYSV (/usr/lib/libgcj.so.2)
at 0x40239227: ffi_raw_call (/usr/lib/libgcj.so.2)
at 0x4014c8db: JvInterpMethod.continue1(_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x40150703: JvInterpMethod.run(ffi_cif, void, ffi_raw, JvInterpMethodInvocation) (/usr/lib/libgcj.so.2)
at 0x4014c671: JvInterpMethod.run_normal(ffi_cif, void, ffi_raw, void) (/usr/lib/libgcj.so.2)
at 0x40239114: ?? (??:0)
at 0x4015365f: gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.2)
at 0x4015db63: java.lang.Thread.run_(java.lang.Object) (/usr/lib/libgcj.so.2)
at 0x402386a4: ?? (??:0)
at 0x403def76: GC_start_routine (/usr/lib/libgcjgc.so.1)
at 0x403f70ba: ?? (??:0)
at 0x4050bd4a: __clone (/lib/libc.so.6)
In "System.out.print(rs.getString("name"))", why only name field works, but others end up with column name not found error message? Is not name, or other fields are, the field/s in the database table? Is my system working?
Any pointers would be highly appreciated.
Damar
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