What happens in the background when I run CREATE EXTENSION age; and then LOAD 'age';?
What changes occur in the background?
When you run CREATE EXTENSION age; in a PostgreSQL database, you are installing the "age" extension into your database. This extension provides additional functionality to the database and can be used by various SQL commands.
When you run LOAD 'age';, you are loading the "age" extension into the current session. This means that you can use the functionalities provided by the "age" extension in the current session only.
In the background, the database system reads the relevant files for the "age" extension, such as control files, SQL scripts, and shared libraries, and stores the necessary metadata in the system catalogs. The system may also need to modify the database schema or execute additional SQL statements to fully install the extension.
When you run the CREATE EXTENSION age command in PostgreSQL, it loads the Apache AGE extension into the PostgreSQL database management system. The Apache AGE extension provides graph database functionality to PostgreSQL, allowing you to store and query graph data.
When you run the LOAD 'age' command, it loads the data from a file into the Apache AGE database. The data is stored in a format that is optimized for graph data storage and retrieval. The data is stored in nodes and edges, and the relationships between them, in a way that makes it easy to retrieve and query the data efficiently.
In summary, when you run the CREATE EXTENSION age and LOAD 'age' commands, it loads the Apache AGE extension into the PostgreSQL database management system and loads the graph data into the Apache AGE database, making it available for querying and analysis.
The CREATE EXTENSION age; and LOAD 'age'; commands in PostgreSQL are used to install and load the Apache Age library into the database system. The CREATE EXTENSION command installs the necessary files and data structures to support the use of Apache Age, while the LOAD command makes the Apache Age functions and commands available for use in the current session. These commands allow for the storage and management of graph data in a PostgreSQL database using Apache Age.
Related
I am currently using Community version on linux server, have configured db2audit process
Which generated audit files at respective location. Then user have to manually execute db2audit archive command to achieved logs file and have to execute thedb2 extract command to extract the archived files into flat ascIII files and then we have to load the files into respective tables.
There only we can analyze the logs by query the tables. In this whole process lots of manual intervention is required.
Question:-Do we have any config settings or utility
with the help of which we can generate logs files which include SQL statement event, host, session id,Timestamp and all instantly and automatically.
need to set instant level logging mechanism to generate flat files for logs of any SQL execution happened or any event triggered in database level in DB2 on linux server
Currently we are using Oracle 19c external table functionality on-prem whereby CSV files are loaded to a specific location on DB server and they get automatically loaded into an oracle external table. The file location is mentioned as part of the table DDL.
We have a requirement to migrate to azure managed postgresql. As per checking the postgresql documentation, similar functionality as oracle external table can be achieved in standalone postgresql using "foreign tables" with the help of file_fdw extension. But in azure managed postgresql, we cannot use this since we do not have access to the DB file system.
One option I came across was to use azure data factory but that looks like an expensive option. Expected volume is about ~ 1 million record inserts per day.
Could anyone advise possible alternatives? One option I was thinking was to have a scheduled shell script running on an azure VM which loads the files to postgresql using PSQL commands like \copy. Would that be a good option for the volume to be supported?
Regards
Jacob
We have one last option that could be simple to implement in migration. We need to use Enterprise DB (EDB) which will avoid the vendor lock-in and also it is free of cost.
Check the below video link for the migration procedure steps.
https://www.youtube.com/watch?v=V_AQs8Qelfc
I am trying to follow quickstart to setup SQL Server (not LocalDb version of SQLServer that comes with Visual Studio) as my data store. Looks like that two databases will be needed - one for configuration and the other for operation. But my problem is that I couldn't figure out what db names I should use. I created two databases using names I came up with and ran the scripts I downloaded from quickstart to create all the tables. Now, when I try to make connection, I think I will need to specify db names in my connection string, don't I? What should I use to replace the original connection string provide by quickstart - "Data Source=(LocalDb)\MSSQLLocalDB;database=IdentityServer4.Quickstart.EntityFramework-4.0.0;trusted_connection=yes;" ?
You can have one database for both. But in general I would keep the configuration part in memory if the number of clients is small. Why spend hours keeping the config in a database for just a few clients and resources?
Better to just keep the users and persisted grants in a database.
I am working in Icinga for performance data collection,
I have to clear all plugin data more than 30 days, how can I do this. I had some google searches does not help.
some references:
External Commands List
Database model
I am using:
RHEL os
icinga2 from source build
postgresql
Using NRPE for collecting remote server data
Is there any tool available to cleanup or any queries to delete all database entries older than 30 days?
http://docs.icinga.org/latest/en/configido.html#configido-ido2db
From the manual, it looks like your ido2db.cfg needs to be configured with the proper data:
max_systemcommands_age=43200
max_servicechecks_age=43200
max_hostchecks_age=43200
max_eventhandlers_age=43200
max_externalcommands_age=43200
max_logentries_age=43200
max_acknowledgements_age=43200
max_notifications_age=43200
max_contactnotifications_age=43200
max_contactnotificationmethods_age=43200
Also, make sure that trim_db_interval is set somewhat sane. The default of 3600 should be sufficient.
trim_db_interval=3600
I wish to make fields in a remote public Sybase database outlined at http://www.informatics.jax.org/software.shtml#sql appear locally in our DB2 project's schema. To do this, I was going to use data federation, however I can't seem to be able to install the data source library (Sybase-specific file libdb2ctlib.so for Linux) because only DB2 and Infomatix work OOTB with DB2 Express-C v9.5 (which is the version we're currently running, I also tried the latest V9.7.)
From unclear IBM documentation and forum posts, the best I can gather is we need to spend $675 on http://www-01.ibm.com/software/data/infosphere/federation-server/ to get support for Sybase but budget-wise that's a bit out of the question.
So is there a free method using previous tool versions (as it seems DB2 Information Integrator was rebranded as InfoSphere Federation Server) to setup DB2 data wrappers for Sybase? Alternatively, is there another non-MySQL approach we can use, such as switching our local DBMS from DB2 to PostgreSQL? Does the latter support data integration/federation?
DB2 Express-C does not allow federated links to any remote database, not even other DB2 databases. You are correct that InfoSphere Federation Server is required to federate DB2 to a Sybase data source. I don't know if PostgreSQL supports federated links to Sybase.
Derek, there are several ways in which one can create a federated database. One is by using the federated database capability that is built in to DB2 Express-C. However, DB2 Express-C can only federate data from specific data sources i.e. other DB2 databases and industry standard web services. To add Sybase to this list you must purchase IBM Federation Server product.
The other way is to leverage DB2 capability to create User Defined Functions in DB2 Express-C that use OLE DB API to access other data sources. Because OLE DB is a Windows-based technology, only DB2 servers running on Windows can do that. What you do is create a table UDF that you can then use anywhere you would expect to see a table result set e.g view definition. For example, you could define a view that uses your UDF to materialize the results. These results would come from a query (via OLE DB) of your Sybase data (or any other OLE DB compliant data source).
You can find more information here http://publib.boulder.ibm.com/infocenter/idm/v2r2/index.jsp?topic=/com.ibm.datatools.routines.doc/topics/coledb_cont.html