Redo migration: Add scroll_depth to imported_pages (plausible#4926)

* add migration

* rename migration file and change column type to Nullable(UInt64)

priv/ingest_repo/migrations/20241216133031_add_scroll_depth_to_imported_pages.exs

@@ -15,7 +15,7 @@ defmodule Plausible.IngestRepo.Migrations.AddScrollDepthToImportedPages do
     execute """
     ALTER TABLE imported_pages
     #{@on_cluster}
-    DROP COLUMN scroll_depth
+    DROP COLUMN IF EXISTS scroll_depth
     """
   end
 end

priv/ingest_repo/migrations/20241218102326_drop_and_add_scroll_depth_to_imported_pages.exs

@@ -0,0 +1,27 @@
+defmodule Plausible.IngestRepo.Migrations.DropAndAddScrollDepthToImportedPages do
+  use Ecto.Migration
+
+  @on_cluster Plausible.MigrationUtils.on_cluster_statement("imported_pages")
+
+  def up do
+    execute """
+    ALTER TABLE imported_pages
+    #{@on_cluster}
+    DROP COLUMN scroll_depth
+    """
+
+    execute """
+    ALTER TABLE imported_pages
+    #{@on_cluster}
+    ADD COLUMN scroll_depth Nullable(UInt64)
+    """
+  end
+
+  def down do
+    execute """
+    ALTER TABLE imported_pages
+    #{@on_cluster}
+    DROP COLUMN scroll_depth
+    """
+  end
+end