MJ points me to another – JDBC-only (stripped but not too bad functionality) plugin for database editing within Eclipse – DbEdit might be worth a look. Features:

• direct table data manipulation using the Table Editor
• editing and executing of SQl statements using the SQL Editor
• exploring database structure using the Tables View
• scanning tables for search patterns with Eclipse integrated database Search Support
• exporting and importing table DDL and content using Eclipse integrated Export/Import feature
• compare tables using the table comparison
• explore a schema's referential structure using the Visual Editor