FAQ - SQuirreL SQL Client.

• What database systems does SQuirreL work with?
• SQuirreL doesn't work with JDK1.2
• I get a "Segmentation fault" on Linux
• I get a "Login has timed out" error with Microsoft SQL Server
• I don't see an object tree with PostgreSQL

FAQ - Plugins.

• How do I write a plugin?
• What are these directories "Colin Bell" and "Johan Compagner" in the plugins directory?
• I can't see any "Look and Feel" files.
• I get a java.lang.NoClassDefFoundError: org/w3c/dom/Node error when trying to validate SQL.

Answers - SQuirrel SQL Client.

What database systems does SQuirreL work with?

In theory SQuirreL should work with any DBMS that has a JDBC 2.0 driver. However not all drivers/DBMS's are fully complient with the JDBC 2.0 specification. People have reported SQuirreL working with the following:

• Axion Java RDBMS.
• HSQL.
• Hypersonic SQL.
• IBM DB2 for Linux, OS/400 and Windows.
• Informix.
• InstantDB.
• Interbase with the Interclient JDBC driver.
• Mckoi SQL.
• Microsoft Access with the JDBC/ODBC bridge.
• Microsoft SQL Server with the Microsoft, WebLogic and jTDS JDBC drivers.
• Mimer SQL
• MySQL with the MM MySQL JDBC driver.
• Oracle 8 with the Oracle thin and OCI drivers.
• Pointbase.
• PostgreSQL 7.1.3 and higher..
• SAPDB.
• Sybase with the JConnect JDBC driver. There are currently some issues with Sybase JConnect 5.5 and SQuirreL 1.1 although JConnect 4.5 seems to work.
• Sunopsis XML Driver (JDBC Edition).
• ThinkSQL RDBMS.

Please send us an email if you have used SQuirreL successfully with other products.

Top

SQuirreL doesn't work with JDK 1.2

From version 1.1beta1 SQuirreL requires at least JDK 1.3. In the future we intend to keep SQuirreL compatible with the latest stable version of the JDK and the one prior to it. Currently the stable version is JDK 1.4 so we are staying compatible with JDK 1.3 as well. When JDK 1.5 is released we will drop compatibility with 1.3.

Top

I get a "Segmentation fault" on Linux

Early versions of the Sun 1.3.0 VM on Linux throw a segmentation fault when running SQuirreL. Either update to the latest 1.3.1 VM or pass the -classic flag to the Java executable - i.e.

java -classic -cp...

Top

I get a "Login has timed out" error with Microsoft SQL Server

Early beta versions of the Microsoft type 4 JDBC driver had a bug which would cause this error when trying to connect. Go to the General Tab in the Global Preferences dialog and change the SQL Login Timeout to 0.

Top

I don't see an object tree with PostgreSQL

Versions of PostgreSQL prior to 7.1.3 didn't supply sufficent metadata to build the object tree in SQuirreL. A fix has been put into SQuirreL so that it would work with PostgreSQL 7.1.2.

Top

Answers - Plugins.

How do I write a plugin?

There is some information in the document plugins.html which you can find in the docs directory within your SQuirreL program directory. This document badly needs a lot of work and its on my todo list. You can also look at the existing plugins to see how they've done things.

If you have got an idea for a plugin just send a message to the SQuirreL Developers list giving a brief description. This helps to ensure that two people don't develop the same plugin.

Top

What are these directories "Colin Bell" and "Johan Compagner" in the plugins directory?

Some people have reported these directories appearing when running JDK 1.3 on Windows 2000. It appears to be a problem with the Hotspot VM. Passing the -classic flag to the java executable fixes the problem - i.e.

java -classic -cp...

Top

I can't see any "Look and Feel" files.

This can be caused by the What are these directories "Colin Bell" and "Johan Compagner" in the plugins directory? problem.

Top

I get a java.lang.NoClassDefFoundError: org/w3c/dom/Node error when trying to validate SQL.

If you use the SQL Validator plugin with JDK 1.3 you will need a JAXP 1.1 XML compliant parser such as xml-xerces or the JAXP 1.1 reference implementation. Copy the jar files from your XML parser to the directory <squirrel-sql>/plugins/sqlval/lib. For xml-xerces this should be xerces.jar and for JAXP 1.1 reference implementation this should be crimson.jar and jaxp.jar.

Top