Questions tagged [jdbc]

Java Database Connectivity (JDBC) is a Java standard that provides the interface for connecting from Java to relational databases.

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9
votes
4answers
45k views

Why does MySQL say I'm out of memory?

I was trying to execute a fairly large INSERT...SELECT in MySQL with JDBC, and I got the following exception: Exception in thread "main" java.sql.SQLException: Out of memory (Needed 1073741824 bytes) ...
4
votes
1answer
4k views

Proxy authentication for PostgeSQL

The following seems likely to be a fairly common situation, but I haven't seen any solutions. I have a PostgreSQL database containing views that are specific to the $user, in order to restrict data ...
0
votes
1answer
27 views

Connecting to “foreign” database on the same DBMS

I am somewhat surprised to see that JDBC allows me to transparently SELECT from a table in a "foreign" database, on the same DBMS, for which I have the requisite privileges, without ...
13
votes
2answers
7k views

To what extent is MariaDB Java client a perfect replacement for MySQL JDBC (Connector/J)?

Premise: I ship a Java application which will make a JDBC connection to a MySQL database. (At the time of this writing it could be 5.1 or 5.5, but hopefully the question and answer don't rely heavily ...
4
votes
3answers
16k views

Why decrease the wait_timeout configuration parameter in MySQL?

Question I'm working on an application that uses a connection pool in Apache Tomcat to communicate with MySQL. I was wondering why would you want to use a smaller wait_timeout than the default of 28,...
2
votes
1answer
276 views

Deadlock troubleshooting in SQLServer

Edit: In case it is relevant, we are connecting to the database via JDBC in a java webapp. We use autocommit=off for all of these operations, and deadlocks mean the job thread is not committed. I am ...
3
votes
2answers
3k views

Does Postgresql support different transaction isolation per connection?

I just discovered that H2 doesn't support concurrent connections using different transaction isolation levels. Meaning, changing the transaction isolation of one connection affects all other ...
0
votes
2answers
882 views

Improve performance on write-only table?

I am using MySQL 5.5 with innoDB. The basis of my server is Netty, JDBC and BoneCP. I have a log table that contains user inputs(HTTP header, request body etc). This table will only be read very ...