databaseChangeLog:
  - changeSet:
      id: 0013-drop-unique-refund-gateway-id
      author: jjo
      changes:
        # 1) Eliminar el índice UNIQUE actual sobre gateway_refund_id
        - dropIndex:
            indexName: uq_refund_gateway_id
            tableName: refunds

        # 2) Crear un índice normal (no único) sobre gateway_refund_id
        - createIndex:
            indexName: idx_refund_gateway_id
            tableName: refunds
            columns:
              - column:
                  name: gateway_refund_id

      rollback:
        # Rollback: quitar el índice normal
        - dropIndex:
            indexName: idx_refund_gateway_id
            tableName: refunds

        # y restaurar el UNIQUE como estaba antes
        - createIndex:
            indexName: uq_refund_gateway_id
            tableName: refunds
            unique: true
            columns:
              - column:
                  name: gateway_refund_id