Tableau throws Index out of bounds error when viewing data via PostgreSQL connector

[LeaDo127]

Problem

I am trying to connect Tableau Desktop to Cube Core using the PostgreSQL connector, following the official Cube guidelines. The connection establishes successfully, and I can see the list of cubes in the Data Source pane as well as dimensions and measures. However, when I click View data button, it immediately throws an "Index out of bounds" error and fails to load the data.
Is there any way to fix it? Thank you

Screenshot

Data Profile

Dataset has 8 columns, <1k rows and only consists of basic string and numeric types.

Environment

• Database: Trino
• BI Tool: Tableau Desktop 2025.3
• Cube SQL API via PostgreSQL connector (port 15432)

[ovr]

Hello @LeaDo127,

Could you take a look at the Cube logs? I assume it should contain panic + backtrace. Without a backtrace, it will be hard to figure out the problem.

Thanks