refactor: sql-tools (#19717)

server/src/sql-tools/comparers/extension.comparer.ts

@@ -0,0 +1,22 @@
+import { Comparer, DatabaseExtension, Reason } from 'src/sql-tools/types';
+
+export const compareExtensions: Comparer<DatabaseExtension> = {
+  onMissing: (source) => [
+    {
+      type: 'ExtensionCreate',
+      extension: source,
+      reason: Reason.MissingInTarget,
+    },
+  ],
+  onExtra: (target) => [
+    {
+      type: 'ExtensionDrop',
+      extensionName: target.name,
+      reason: Reason.MissingInSource,
+    },
+  ],
+  onCompare: () => {
+    // if the name matches they are the same
+    return [];
+  },
+};