The IBM DB2 Enterprise Server Edition is a relational model database server developed by IBM. It primarily runs on Unix (namely AIX), Linux, IBM i (formerly OS/400), z/OS and Windows servers.

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139 views

How efficiently does iSeries DB2 use index with WHERE <>?

MS SQL dev here, this is my first attempt to optimize a DB2 query on iSeries. I was asked to help improve a huge query which consists entirely of dozens of joined subselects. Some of those subselects ...
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1answer
2k views

DB2 Communication link failure issue

I would like to get your valuable suggestions for the below problem. My Perl application connects to a DB2 database and keeps inserting data into a table. The application successfully inserts data ...
2
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1answer
1k views

DB2 Server Table Space Locked

At work we keep receiving the following DataException seemingly at random when one of our processes tries to write/access a table for one of our clients: com.ibm.db.DataException: A database manager ...
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1answer
683 views

How to create Buffer Pool in Database dedicated only for ONE BIG table?

I have table TICKET with 400K records in database (DB2). I wish to create one huge buffer pool which will be dedicated only to this one big table for faster response. What are the steps to do it? ...
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2answers
3k views

How to drop a DB2 instance when the instance owner was removed

This is a real sticky situation. I was handed over a machine (running an AIX 7.1), and my first task was to re-install DB2 server on it. But someone before me had conveniently removed an instance ...
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3answers
2k views

How do i subtract a number of days from a prepared statement parameter in db2?

I have a C# application using OLEDB to connect to a DB2 database. Basically, I want to do this: SELECT CALC.WEEK, COUNT(CALC.ID) AS TRANSACTIONS , SUM(CALC.SUBTOTAL) AS REVENUE FROM ( ...
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1answer
2k views

DB2 Express on Windows 7 - Disable security?

I'm trying to install DB2 Express-C on my PC (Windows 7 pro), but no matter how I've installed or configured it, I can't grant the ability to create databases to my windows domain account. No matter ...
2
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1answer
188 views

DB2 Count problem

We have a query that returns over 20,000 rows on some occasions but times out due to the large amount of data. We have written a COUNT(*) query to throw an error if the record count is more than ...
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1answer
368 views

DB2: Is it good to create the LONG table space to use 32 KB data page

Our DB2 database(V9.7) has only defined one table space to store all the big object like xml. And xml size could be different. Some are about 2kb average. And some are 7kb average. So does it make ...
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3answers
2k views

DB2 LOAD data into table - Interpreting the error messages

I encountered some constraint issues when loading data from file into table ** SQL3109N The utility is beginning to load data from file "xag". SQL3500W The utility is beginning the "LOAD" phase at ...
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2answers
859 views

Syntax changes between DB2 for i (DB2/400) v5r4 and v6r1

Does anyone know where can I find list of syntax changes between DB2 for i v5r4 and v6r1? We are currently migrating a backing database for an application from DB2 for i v5r4 to v6r1 and found out ...
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1answer
668 views

Does DB2 have equivalents for Oracle's UTL_ENCODE and UTL_RAW modules?

I'm looking for something similar to: utl_smtp.command(conn, utl_encode.base64_encode(utl_raw.cast_to_raw(<username>))); I couldn't find any reference among the DB2's system-defined modules ...
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2answers
641 views

What is the recommended Buffer Pool size on a 2GB RAM PC?

I installed DB2 Express-C on a PC with 2 GB RAM and running Windows Server 2008 R2 OS. While creating a new database, there is an option to set Buffer Pool size with default set to 4K. How much is ...
2
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1answer
637 views

copy schema across different physical databases in db2

Is there any way to programatically copy across schema (i.e. tables,functions,views) etc from one database over to another one. Assuming both are running same versions of DB2. I found a few utilities ...
2
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1answer
240 views

How do you convert IBM DB2's recursive increment to MySQL version?

DB2 Queries: WITH TABLE1 (YEAR_END) as( VALUES (2011)) , TABLE2 (YEAR_END) AS ( VALUES(2011)) , TABLE3 (YEARS) AS ( SELECT 0+2008 FROM TABLE1 T1, TABLE2 T2 union ...
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0answers
33 views

Optimization suggestions for db2 materialized view

I have a view for db2 9.7 which has consolidated o/p from few tables. The view is built and it is working fine I want optimization suggestions on the view SQL CREATE VIEW XYZZ AS SELECT ...
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343 views

Split comma separated entries to rows

I have a Table like this: | ID | OtherID | Data +--------+-----------+--------------------------- | 5059 | 73831 | 5103,5107 | 5059 | 73941 | 5103,5104,5107 | 5059 | 73974 | ...
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1answer
540 views

DB2 Query Error SQL0204N Even With The Schema Defined

I'm using Python to access tables in DB2 10.1.0 I have a login account named foobar and a schema with the same name. I have a table named users under the schema. When I'm logged in as foobar, I can ...
2
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1answer
45 views

Adding a column to the view which shows the date in format YYYYMM

In the following view, I want to add a column (not alter the view) named say "ABC" which shows the date in format YYYYMM (no date, only year and month). How can I do that? I am using db2. create view ...
2
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1answer
75 views

DB2 9.7, create or replace tablespace possible?

I am creating my tablespaces in the sql scripts that create the database schema. This causes a problem in continuous integration processes, where consecutive execution of the script is not possible ...
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0answers
259 views

IBM DB2 Command line Window - Administrator disappears on windows server 2008 r2?

I have installed IBM DB2 version 10 on windows server 2008 r2 machine. However i am unable to open it's command line window. For example: Whenever i try to open Command Windows - Administrator it ...
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0answers
702 views

Cannot install DB2 Express C 10.1 on Mac OS X 10.7.5 [duplicate]

When I invoke ./db2setup it cannot find the JRE where it expects it. Binary for Java not found as follows: /private/tmp/db2/expc/db2/macos/install/db2setup: line 606: ...
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1answer
510 views

Can High Water Mark be cleared?

Lately I experience below errors when restoring db2 database SQL2043N Unable to start a child process or thread SQL1084C Shared memory segments cannot be allocated db2stop and then db2start ...
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2answers
330 views

DB2: Cannot use RUNSTATS/REORG in trigger definitions?

CREATE TRIGGER MY_TRIG AFTER INSERT ON MY_TBL FOR EACH ROW BEGIN IF SOMECONDITION THEN DELETE FROM MY_TBL WHERE PK IN (SELECT PK FROM MY_TBL WHERE SOMEOTHERCONDITION FETCH ...
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1answer
478 views

Testing if temp table exists in iSeries SQL stored procedure

What would be the syntax for testing if there is already a global temporary table in DB2 for IBM i 7.1? I tried this after DECLARE GLOBAL TEMPORARY TABLE: SELECT * FROM QSYS2.SYSTABLES WHERE ...
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2answers
909 views

Table orders regarding Nested loop join in DB2

First I would like to cite the existing post Table order in Join Query so the author is saying that the table order really doesn't make things(result, access plan)different. I have doubt on this ...
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2answers
3k views

set integrity not enforced in DB2

I am a bit confused with the SET INTEGRITY concept in DB2, why we can OFF the set integrity check to put the table in PENDING state ? does that mean that we can neglect the constraint definitions on ...
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2answers
31 views

DB2 database -> does it continue to be platform-specific? (iSeries, LUW, z/OS)

Wikipedia says DB2 is no longer Platform-specific: Historically and unlike other database vendors, IBM produced a platform-specific DB2 product for each of its major operating systems. However, in ...
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1answer
118 views

Transaction(s) still alive: How do I find the cause?

I can tell that something is hogging the transaction log on the DB2 for one of our Websphere Commerce installations. Basically I have a burst of transaction log files that are timestamped 5 days ago. ...
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2answers
2k views

Adding User access to DB2

I have installed DB2 10.1 in a Red hat box. During the installation I was asked to create several users (db2inst1, db2fenc1 etc). I have been using db2inst1 to perform all operations with DB2 and it ...
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4answers
620 views

Backup and restore of RDBMS(Oracle, DB2, SQL Server) from Perl

What could be the best approach ? Till now could figure out the following (Oracle) Calling exp.exe and imp.exe utilities in Oracle client using Java and inturn call it from Perl. Calling exp.exe ...
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4answers
4k views

What is the purpose of having a table NOT LOGGED INITIALLY

I came across this recently. When defining a table in DB2 LUW (at least 9.5 or higher), you can define it as NOT LOGGED INITIALLY. Example from the book I read: CREATE TABLE products ( productID ...
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1answer
477 views

What does HSJOIN mean in an Explain Plan?

I have the following EXPLAIN PLAN results from a query on my DB2 database. 0 SELECT STATEMENT ( Estimated Costs = 5.928E+02 [timerons] ) 1 RETURN 2 HSJOIN 3 [O] ...
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1answer
324 views

Remove single quotes from db2 column name

I have following query which i am trying to execute against db2 database server SELECT REPLACE('\'abc\'','\'','') FROM TN_DAY_PROCESS I am expecting the output like abc without single quotes from ...
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1answer
108 views

db2 connecting to a db via alias and storing user name and password

I created a TCP node and I catalogued a db into it. The catalogued db needs user name and password to be accessed. Is there anyway I can store username and password in the cataologue (or other way)? I ...
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2answers
139 views

query to check all SCD tables that have data for specific date

It's easy to find all SCD tables through select * from syscat.TABLES t join syscat.COLUMNS s on t.tabname = s.tabname where s.COLNAME = 'EFFECTIVE_DTE' and t.type='T' ...
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1answer
1k views

SQL1641N error on linux while running db2start using db2 express c on linux (LUW) but the file system is not mounted using nosuid

I am trying to install and start db2 on my linux machine using the following script: #!/usr/bin/env bash MKDIR=/bin/mkdir RM=/bin/rm TAR=/bin/tar ...
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4answers
7k views

Query to list all tables in a schema

I am using Rational Application Developer to run querys on a database. We are unable to locate anyone who has a list of the tables on the schema and so far the queries we have found to get a list of ...
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1answer
191 views

Cannot execute stored proc linked to C routine in DB2

DB2 version: 9.7.0.6 OS: RHEL 5 Here are the steps I took to create and bind a C routine to DB2: 1> Created myprog.sqC file 2> Executed db2 prep myprog.sql bindfile 3> Executed db2 bind myprog.bnd ...
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1answer
1k views

IBM DB2 - store large files

I want to store large files in a DB2 database and I need more information about which is the best technique to use as I am new in this IBM product (previous experience with T-SQL only). The ...
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1answer
328 views

Analyzing TCB Index Status for DB2

The Following is the TCB index that I could get using a command for my DB2 database. I don't know how to analyze it. Which columns are important? What do they mean? TCB Index Stats: Address ...
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1answer
16 views

“Approximately equal” between Sync and Async operations for PageCleaners

The documentation of num_iocleaners says: The parameter can be reduced if both of the following conditions are true: pool_data_writes is approximately equal to pool_async_data_writes ...
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1answer
18 views

System parameter in catalog tcpip node

What is the purpose of the "system" parameter when cataloging tcpip nodes? >>-CATALOG--+-------+--+-TCPIP NODE--+--nodename----------------> '-ADMIN-' +-TCPIP4 NODE-+ ...
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1answer
80 views

Way to ensure just one connection to a DB2 database

Let's suppose a database with a bad security design, say everyone access to the database with a user with DBADM or SYSADM authority, and also, there could be only username for everyone (i.e. ...
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1answer
480 views

DB2 - Archive Mode - on what values to set LOGPRIMARY,LOGSECOND,LOGFILSIZ?

we must set our database from CIRCULAR to ARCHIVE mode in order to enable ONLINE backups. Backups will be done every 1 day. Database is now almost 30GB. Database grows approximately 1GB per month. ...
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2answers
315 views

Tablespace utilization in db2 (percentage of tablespaces)

how much free space is there…in each tablespace, How to calculate… i need tablespace utilization in MB's and...how can i get tablespace percentage also...used and usable
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2answers
100 views

db2 executing command crash shell

I have a simple ksh script that executes db2 queries, such as #!/bin/ksh #some initialization #step1,2,3 set -e db2 -x "select * from table a " #step4 The main issue seems to be caused by the db2 ...
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1answer
335 views

How to convert DB2 9.5 to DB2 10.5 online (Linux)

How to convert DB2 9.5 to DB2 10.5 online (Linux) ? This can be done with IBM InfoSphere Data Replication? Has anyone done this or have any idea how to do?
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3answers
149 views

Best practice to query administrative views for instance level elements

I want to query a monitor element at instance level (for example the memory used for the instance) via a query like this: SELECT MEMBER, MAX_MEMBER_MEM, CURRENT_MEMBER_MEM, PEAK_MEMBER_MEM FROM ...
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1answer
105 views

creating 2 database at the same time in db2

Do you know whether it is safe to have in one shell user db2inst1 creating a database A and having another shell the same user creating at the same time database B? create database A # shell 1 ...