{"active":true,"blog_title":"Simplify Schema Changes in Fabric Data Warehouse with ALTER COLUMN (Preview)","blog_url":"https://community.fabric.microsoft.com/t5/Fabric-Updates-Blog/Simplify-Schema-Changes-in-Fabric-Data-Warehouse-with-ALTER/ba-p/5177593","feature_description":"ALTER COLUMN to non-nullable lets customers enforce "this column must always have a value" directly, in place, no more full table rebuilds just to tighten a constraint. It saves time, avoids error-prone workarounds (CTAS, drop/rename), and preserves table history. Combined with default-constraint support, existing rows get backfilled automatically, so the change is safe and non-breaking.","feature_name":"ALTER COLUMN (GA)","last_modified":"2026-10-07","product_id":"fa3a73cd-dcd6-ee11-9079-000d3a310f67","product_name":"Data Warehouse","release_date":"Q1 2027","release_item_id":"c287226c-6ec2-f111-aaad-70a8a5b19412","release_status":"Planned","release_type":"General availability"}