How to catalog a DB2 database?
- database_name represents the name of the database you want to catalog.
- database_alias represents a local nickname for the database you want to catalog.
- node_name represents a nickname you can set for the computer that has the database you want to catalog.
- auth_value specifies the type of authentication that takes place when connecting to the database. ...
How to connect DB2 database?
Connect to an IBM Db2 database from Power Query Desktop. To make the connection, take the following steps: Select the IBM Db2 database option from Get Data. Specify the IBM Db2 server to connect to in Server. If a port is required, specify it by using the format ServerName:Port, where Port is the port number.
How to create a new DB2 database?
- (1) Before creating a Controller application repository (or FAP or Data Mart) database, you must ensure that your DB2 server is installed/configured correctly. 1. ...
- (2) Create a new DB2 database 1. ...
- (3) Grant permissions in the database to a database user account (see explanation below on DB2 security): 1. ...
- (4) Create two buffer pools:
How to get database size in DB2?
How to discover the size of a database. Steps you should perform if you need to obtain the size of a database. To obtain the total size of a database, you can do it using two different ways. The first one is perform this command in a command line: db2 connect to <DBNAME>. db2 "call get_dbsize_info (?,?,?,0)"
What is Db2 catalog database?
Db2 automatically catalogs databases when they are created. It catalogs an entry for the database in the local database directory and another entry in the system database directory.
What is a catalog in a database?
A database catalog of a database instance consists of metadata in which definitions of database objects such as base tables, views (virtual tables), synonyms, value ranges, indexes, users, and user groups are stored.
Where is Db2 catalog information stored?
Answer. This information is kept in the database directory files.
What is a catalog table?
A catalog table is one that returns information about another table, or data source. It is similar to what MariaDB commands such as DESCRIBE or SHOW do.
What is a catalog and why is it used?
A catalog is a list or record of items. It is sometimes spelled catalogue. It commonly refers to a list of things being offered, such as items for sale or courses at a school.
What is the difference between a database and a catalog?
A library catalog allows you to search for items owned by a specific library, including books, movies, journals, magazines, music scores, government documents, and more. Library databases allow you to efficiently search for published information such as magazine, journal, and newspaper articles.
Which catalog table is used to store the details of all the tables in DB2?
SYSTABLES is one catalog table that records information when a table is created. DB2 inserts a row into SYSIBM.
What is the default database in DB2?
DSNDB04If you create a table space and do not specify a database name, the table space is created in the default database, DSNDB04. In this case, Db2 implicitly creates a database or uses an existing implicitly created database for the table.
What are the mandatory components of DB2?
The complex DB2 internal structure has been divided into 5 major components / Address Spaces:System Services component / System Services Address Space (Job: DSN1MSTR)Locking Services component/ Locking Services Address Space (Job: IRLMPROC)Database Services component/ Database Services Address Space (DSN1DBM1)More items...
What is difference between catalog and schema?
Catalog name is the database name. Schema name corresponds to the database owner. Catalog name is the database name. Schema name corresponds to the catalog owner, such as dbo.
What is a catalog in SQL?
The system catalog consists of tables describing the structure of objects such as databases, base tables, views, and indices. (These tables are called system base tables.) The Database Engine frequently accesses the system catalog for information that is essential for the system to function properly.
What are catalog views in SQL?
Catalog views return information that is used by the SQL Server Database Engine. We recommend that you use catalog views because they are the most general interface to the catalog metadata and provide the most efficient way to obtain, transform, and present customized forms of this information.
What is a catalog in SQL?
The system catalog consists of tables describing the structure of objects such as databases, base tables, views, and indices. (These tables are called system base tables.) The Database Engine frequently accesses the system catalog for information that is essential for the system to function properly.
What is a relational catalog?
Mar 2, 2017. The heart of any relational database management system is the system catalog that documents the database objects and system settings being used. The system catalog offers a wealth of information about your DBMS. You can think of it as the knowledge base of every piece of data known to the system.
What kind of data does system catalog have?
The system catalog consists of tables and views that describe the structure of the database. Sometimes called the data dictionary, these table objects contain everything that the database knows about itself. Each system catalog table contains information about specific elements in the database.
What is a database schema?
A database schema is considered the “blueprint” of a database which describes how the data may relate to other tables or other data models. However, the schema does not actually contain data. A sample of data from a database at a single moment in time is known as a database instance.
What is catalog table?
The catalog tables describe such things as table spaces, tables, columns, indexes, privileges, application plans, and packages. Authorized users can query the catalog; however, it is primarily intended for use by Db2 and is therefore subject to change. All catalog tables are qualified by SYSIBM. Do not use this qualifier for user-defined tables.
When are catalog tables updated?
The catalog tables are updated by Db2 during normal operations in response to certain SQL statements, commands, and utilities.
Do the name of the column and its description appear in the explanation of the column?
For columns for which Use is N or I, the name of the column and its description do not appear in the explanation of the column.
Is a catalog table part of the general use programming interface?
Not all catalog table columns are part of the general-use programming interface. Whether a column is part of this interface is indicated in a column labeled Use in the table that describes the column. The values that Use can assume are as follows:
What is the DB2 catalog?
If the DB2 optimizer is the heart and soul of DB2, the DB2 Catalog is its brain, or memory. The knowledge base of every object known to DB2 is stored in the DB2 Catalog.
Is DB2 a database?
The presence of an active catalog is a boon to the DB2 developer. The DB2 Catalog is synchronized to each application database. You can be assured, therefore, that the metadata retrieved from the DB2 Catalog is 100% accurate. Because the DB2 Catalog is composed of DB2 tables (albeit modified for performance), you can query these tables using standard SQL. The hassle of documenting physical database structures is handled by the active DB2 Catalog and the power of SQL.
Is a DB2 catalog a standard table?
The DB2 Catalog is structured as DB2 tables, but they are not always standard DB2 tables. Many of the DB2 Catalog tables are tied together hierarchically ”not unlike an IMS database ”using a special type of relationship called a link . You can determine the nature of these links by querying the SYSIBM.SYSLINKS DB2 Catalog table. This DB2 Catalog table stores the pertinent information defining the relationships between other DB2 Catalog tables. To view this information, issue the following SQL statement:
How does Db2 work?
Db2 automatically catalogs databases when they are created. It catalogs an entry for the database in the local database directory and another entry in the system database directory. If the database is created from a remote client (or a client which is executing from a different instance on the same machine), an entry is also made in the system database directory at the client instance.
What is a database cataloged as?
Databases on other database partition servers are cataloged as remote entries.
What is the command to recatalog a database?
The CATALOG DATABASE command can also be used to recatalog uncataloged databases, or maintain multiple aliases for one database, regardless of database location.
What command is used to add a database to a purescale database?
In a pureScale environment, the db2cluster -cm -add -database_mounts database-name command must be run after the CATALOG DATABASE command.
Where is the command issued when cataloging a local database into the system database directory?
In a partitioned database environment, when cataloging a local database into the system database directory, this command must be issued from a database parti tion on the server where the database is located .
How to list database directory?
List the contents of the system database directory using the LIST DATABASE DIRECTORY command. To list the contents of the local database directory use the LIST DATABASE DIRECTORY ON path, where path is where the database was created.
DB2 Client
DB2 databases can be cataloged on DB2 servers or DB2 clients. Before trying cataloging, make sure you at least have the DB2 client installed. DB2 Clients are free (no licensing required). All App servers should have DB2 clients already installed on them. Web servers should not.
Always test a connection!!
It is very important to test the connection because a typo could cause it not to work. Or there could be network issues preventing connection. The general form of the syntax for doing this is:
DB2 Client
DB2 databases can be cataloged on DB2 servers or DB2 clients. Before trying cataloging, make sure you at least have the DB2 client installed. DB2 Clients are free (no licensing required). All App servers should have DB2 clients already installed on them. Web servers should not.
Make sure you have all the inputs
REMOTE: Short host name with proper entry in hosts file OR Fully qualified host name OR IP address (that is the order of preference if you have all)
Always test a connection!!
It is very important to test the connection because a typo could cause it not to work. Or there could be network issues preventing connection. The general form of the syntax for doing this is:
What is DB2 database?
DB2 has a set of tables that function as a repository for all DB2 object s. These tables define the infrastructure of DB2, enabling simple detection of and access to DB2 objects. Two sets of tables store all the information related to DB2 objects: the DB2 Catalog and DB2 Directory.
What is DB2 directory?
DB2 uses a second data dictionary, other than the catalog, called DB2 Directory for storing detailed, technical information about the aspects of DB2's operation. The DB2 Directory is for DB2's internal use only. The data in the DB2 directory cannot be accessed by the SQL statements.
What is metadata in DB2?
In other words as the user creates or modifies the DB2 objects, metadata (data about data) is being accumulated in the catalog. When a DB2 SQL statement is issued, the DB2 catalog is accessed or updated. All the information in the DB2 catalog is not however up-to-date.
Is DB2 up to date?
All the information in the DB2 catalog is not however up-to-date. The DB2 catalog can be updated using the RUNSTATS utility. DB2 Catalog—Plans and Packages. DB2 Catalog-Views, Stogroups and Database. Catalog Structure. The DB2 catalog is structured as DB2 tables, but they are not standard tables.
What is DBRMLIB to DB2?
The DBRM LIB to Db2 Catalog comparison process verifies whether the DBRMLIB members for the application plan you are promoting to production have been bound to your production subsystems.
How to submit DBRMLIB to Db2?
Submit the DBRMLIB to Db2 Catalog comparison job by typing SUB on the Command line, and pressing Enter.
What does it mean when a plan contains DBRMS?
When a plan contains DBRMS instead of packages, binding the plan without all of the DBRMs previously bound to it drops the DBRMs from the plan, and the DBRMs are no longer valid under the plan. Instead of taking this action, SQL Explorer prints a severe message including the DBRMLIB, plan name, and DBRM name to warn you about this potential problem. It is possible to get this error more than once for the same plan, if more than one DBRM was not found in the DBRMLIBs.
What is the action to review DBRMs?
Action: Review these DBRMs to determine whether they should be dropped from the plan, whether you should specify their DBRMLIBs in the input, or whether they were promoted improperly.
Why did there not need to generate binds in DBRMLIB?
Explanation: There was no need to generate a bind because the contoken in the DBRMLIB matched the contoken in the catalog.
How to change the name of the PSSD2CJB token?
On the Command line, type C token newToken, and press Enter, where token is the existing token name and newToken is the new token name you specify. Editable tokens are defined in the Editable tokens in the PSSD2CJB member table (see the following table).
When are binds generated?
Based on existing bind parameters, binds are generated when the timestamp in the catalog is earlier than the timestamp in the DBRMLIB.