How To connect to server root with jdbc driver
Posted by: Mx Dog
Date: February 18, 2022 01:30AM

I have fighting this for years with c#, java, pentaho and a few others.

using the com.mysql.jdbc.Driver from mysql-connector-java-8.0.27.jar , how do you connect to a server's "ROOT" so that you can browse and/or select different schemas ? as of now I have to make a separate connection to each and every data base I want to use and that just doesn't seem right to me.

It should work something similar to workbench when you make a connection and see all the different databases in the left pane and can use;/select; on that connection and other DB's that connect you to the root if no database is selected

the closest I have come is connecting to the information_schema but that has problems too trying to use a "Real" table from the information you can get from it.

is there some hidden table to connect to because it seems short sighted to have to connect like this. I feel like I am missing the obvious here either with the driver or the server set up not to mention having to know the data structure in advance to do anything.

so assuming a basic connection string is ...
jdbc:mysql://localhost:3306/WHAT-GOES-HERE? other then a table name to get the top level of the server if i do not put a table name in then any query's fail with cannot find schema.....even though there is a good active connection.

i.e. jdbc:mysql://localhost:3306/
then depending on software ...
use table1; select * from table1 ;
ERROR cannot find schema information null or similar message...

what i do now the head-ache it is:

... query get table names
jdbc:mysql://localhost:3306/table1 i need data from
jdbc:mysql://localhost:3306/table2..3..4..etc i need data from

is just a pain when i know there should be a better way to do this with out making a ton of separate connections. Some of this canned software i use, I literally have to make a separate connection for each and every database on the server i need to use.

do i have to structure the queries in some way to actually select a certain schema after a generic connection ( no schema in connection string ) or am i missing something obvious in the connector string to get the "ROOT" and access to all the databases on the server that the user/me has rights too ....

like i said it works in workbench and and mysql client so shouldn't it should work in the jdbc driver as well ? what magic am i missing ?

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How To connect to server root with jdbc driver
February 18, 2022 01:30AM

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