fix(sqlserver): align insert hints with generated columns

apps/desktop/src/lib/backend/api.ts

@@ -151,6 +151,7 @@ export const listCompletionObjects = forward("listCompletionObjects");
 export const completionAssistantSearch = forward("completionAssistantSearch");
 export const getObjectSource = forward("getObjectSource");
 export const getColumns = forward("getColumns");
+export const getSqlServerColumnMetadata = forward("getSqlServerColumnMetadata");
 export const listDataTypes = forward("listDataTypes");
 export const listIndexes = forward("listIndexes");
 export const listForeignKeys = forward("listForeignKeys");

apps/desktop/src/lib/backend/http.ts

@@ -14,6 +14,7 @@ import type {
   ObjectSource,
   ObjectSourceKind,
   ColumnInfo,
+  SqlServerColumnMetadata,
   IndexInfo,
   ForeignKeyInfo,
   TriggerInfo,
@@ -640,6 +641,10 @@ export async function getColumns(connectionId: string, database: string, schema:
   return get(`/api/schema/columns?${qs({ connection_id: connectionId, database, schema, table, catalog })}`);
 }
 
+export async function getSqlServerColumnMetadata(connectionId: string, database: string, schema: string, table: string): Promise<SqlServerColumnMetadata[]> {
+  return get(`/api/schema/sqlserver/column-metadata?${qs({ connection_id: connectionId, database, schema, table })}`);
+}
+
 export async function listDataTypes(connectionId: string, database: string): Promise<string[]> {
   return get(`/api/schema/data-types?${qs({ connection_id: connectionId, database })}`);
 }

apps/desktop/src/lib/backend/tauri.ts

@@ -17,6 +17,7 @@ import type {
   ObjectSource,
   ObjectSourceKind,
   ColumnInfo,
+  SqlServerColumnMetadata,
   IndexInfo,
   ForeignKeyInfo,
   TriggerInfo,
@@ -789,6 +790,10 @@ export async function getColumns(connectionId: string, database: string, schema:
   return invoke("get_columns", { connectionId, database, schema, table, catalog });
 }
 
+export async function getSqlServerColumnMetadata(connectionId: string, database: string, schema: string, table: string): Promise<SqlServerColumnMetadata[]> {
+  return invoke("get_sqlserver_column_metadata", { connectionId, database, schema, table });
+}
+
 export async function listDataTypes(connectionId: string, database: string): Promise<string[]> {
   return invoke("list_data_types", { connectionId, database });
 }

apps/desktop/src/lib/sql/insertValueHintColumns.ts

@@ -0,0 +1,14 @@
+import type { DatabaseType, SqlServerColumnMetadata } from "@/types/database";
+
+type InsertValueHintColumn = Pick<SqlServerColumnMetadata, "name"> & Partial<Pick<SqlServerColumnMetadata, "is_identity" | "is_computed" | "is_hidden" | "generated_always_type">>;
+
+export function insertValueHintColumnNames(databaseType: DatabaseType | undefined, columns: readonly InsertValueHintColumn[]): string[] {
+  return columns
+    .filter((column) => {
+      if (databaseType !== "sqlserver") return true;
+      // SQL Server reports computed and temporal period columns independently;
+      // check every structured flag so positional VALUES only maps writable columns.
+      return !column.is_identity && !column.is_computed && !column.is_hidden && (column.generated_always_type ?? 0) === 0;
+    })
+    .map((column) => column.name);
+}