ColumnStore Compatibility Improvements

This epic focuses on improving compatibility between MariaDB ColumnStore and other parts of the MariaDB ecosystem, third-party tools, and standard SQL behavior. The goal is to reduce friction when integrating ColumnStore with existing applications, clients, and workflows, making it easier to adopt without needing major rewrites or workarounds.

Key objectives include:

• Align SQL behavior with MariaDB Server for greater consistency
• Improve support for functions, data types, and syntax commonly used in BI tools
• Ensure compatibility with popular connectors, clients, and ORMs
• Address differences in error handling, data type coercion, and query semantics
• Enhance cross-engine query behavior in multi-engine setups

These efforts help ensure ColumnStore fits naturally into broader MariaDB deployments and user environments.