Fix DBeaver Export Data – Wrong Format or Truncated Results

In this tutorial, you'll learn about Fix DBeaver Export Data. We cover key concepts, practical examples, and best practices.

You run a query in DBeaver, right‑click the results, and choose Export Data. You pick CSV, click Next through the wizard, and open the file — only to find truncated text, headers missing, or the entire output in one column.

Wrong ❌

"id","name","bio"
1,"Alice","Alice is a software engineer based in San Francisco who spe
2,"Bob","Bob works on data pipelines at Acme Corp and enjoys hiking

Every long bio field is cut off at 255 characters. DBeaver's default export truncated the output.

Alternatively, you get:

id,name,bio
1,"Alice","Alice is a software engineer...

A single row spans multiple lines in the actual data, and your CSV parser breaks.

Right ✅

Correct export workflow:

1. Run your query → right‑click the result grid → Export Data
2. Choose CSV (or Excel, JSON, SQL, etc.)
3. In the Format Settings tab:
   • Delimiter: , (or ; for Excel EU locales)
   • Quote character: "
   • Encoding: UTF-8
   • Header: ☑
4. In the Export Settings tab:
   • Output: Single file
   • File name: export.csv
   • Open file after export: ☑
5. Critical — Data Format tab:
   • Strings: ☑ Trim whitespace
   • NULL strings: NULL
   • LOB/CLOB: ☑ Fetch all content (unlimited length)
   • Date/Time: yyyy-MM-dd HH:mm:ss
6. Click Finish

Now the CSV is complete:

"id","name","bio"
1,"Alice","Alice is a software engineer based in San Francisco who specializes in distributed systems and Go."
2,"Bob","Bob works on data pipelines at Acme Corp and enjoys hiking in the Pacific Northwest on weekends."

Root Cause

DBeaver defaults to truncating large object/text columns to 255 characters in the grid view for performance. The Export Data wizard inherits this truncation unless you explicitly set LOB/CLOB to unlimited.

Prevention

• Before exporting, click Fetch all in the result grid (the button with a down‑arrow) to load all rows.
• Save export profiles for recurring exports (the wizard has a Save profile button at the end).
• Use the Excel format if downstream consumers need formatted numbers and dates.
• For automated exports, use the Tasks view to schedule exports via DBeaver's job scheduler.

Common Mistakes with export data

1. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors
2. Non-exhaustive pattern matches that compile with warnings then crash at runtime
3. Misunderstanding that String is [Char] with poor performance for large text operations

These mistakes appear frequently in real-world DBEAVER code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

Learn data export automation in the DodaTech DBeaver Pro course.