v2.1.5 – Index definition validation

Version 2.1.5

Changed

Multi-column index limits

• Removed hard-coded limits when creating Biscuit indexes over multiple columns, allowing
  more flexible index definitions.

Fixed

Index definition validation

• Restricted indexing to text-based datatypes.
• Support for non-text datatypes has been removed to ensure correct operator semantics,
  planner behavior, and index consistency.

Expression indexing

• Biscuit now raises an explicit error when attempting to create an index on an expression
  (e.g., lower(col)), which is not currently supported. This prevents silent
  misconfiguration and enforces column-based indexing semantics.

Note: Biscuit currently supports indexing base columns only. Expression indexing
may be revisited in a future release.