Good Morning Michael:

There are too many databases and tables in the UCSC MySQL
system for generic database browser tools such as you are using
to work with.  Try this command on a command line to see all databases:

$ mysql --user=genome --host=genome-mysql.cse.ucsc.edu -A -e "show databases;" 
hg18

Try this command to see all tables in database 'hg18':

$ mysql --user=genome --host=genome-mysql.cse.ucsc.edu -A -e "show tables;" hg18

There are 4,593 tables in this database.  Your browser tools are
attempting to query each of those tables for all of their columns.
That would take a long time.

Our database schema definition is kept in this file:
http://hgwdev.cse.ucsc.edu/~kent/src/unzipped/hg/makeDb/schema/all.joiner

You can use our "tables browser" to examine the database table relationships:
http://genome.ucsc.edu/cgi-bin/hgTables?db=hg18
http://genome.ucsc.edu/goldenPath/help/hgTablesHelp.html

--Hiram

Michael Zouberakis wrote:
> Hello,
> 
> I'm experiencing enormous delays when attempting to query any of the
> databases @ genome-mysql.cse.ucsc.edu.
> 
> I'm using version 1.2.17 of MySQL's Query Browser and connect to
> genome-mysql.cse.ucsc.edu using the information provided here
> http://genome.ucsc.edu/FAQ/FAQdownloads.html#download29
> <http://genome.ucsc.edu/FAQ/FAQdownloads.html#download29>
> I can successfully connect to the server and can see a listing of all
> databases in the Query Browser window. When attempting to view the tables of
> a database via Query Browser's GUI the application either hangs completely
> or takes approximately (more than) 10 minutes just to display the tables
> under a schema. I'm experiencing similar side effects when trying to
> retrieve table information from a schema using a simple Java class (MySQL
> JDBC version 5.1.2).
> 
> Any suggestions/hints on how to overcome this issue are welcome. Thanks in
> advance.
> 
> Kind Regards,
> Michael
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