Add basic table sorting

src/app/duckdb.service.ts

@@ -7,6 +7,11 @@ export interface Column {
   type: string;
 }
 
+export interface SortColumn {
+  name: string;
+  sortType: 'asc' | 'desc';
+}
+
 export interface RowsResponse {
   rows: any[];
   totalRows: bigint;
@@ -98,6 +103,7 @@ export class DuckdbService {
     start: number,
     numRows: number,
     columns: Column[],
+    sorts: SortColumn[],
     filters: unknown[],
     aggregations: unknown[],
   ): Promise<RowsResponse> {
@@ -107,9 +113,12 @@ export class DuckdbService {
         `SELECT COUNT(1) totalRows FROM ${sanitisedFileName(file)}`,
       );
       const { totalRows } = totalRowResponse.get(0)?.toJSON()!;
-      const response = await conn.query(
-        `SELECT ${columns.map((column) => `"${column.name}"`).join(', ')} FROM ${sanitisedFileName(file)} LIMIT ${numRows} OFFSET ${start}`,
-      );
+      let query = `SELECT ${columns.map((column) => `"${column.name}"`).join(', ')} FROM ${sanitisedFileName(file)} `;
+      if (sorts.length > 0) {
+        query += ` ORDER BY ${sorts.map((sort) => `"${sort.name}" ${sort.sortType}`).join(', ')}`;
+      }
+      query += ` LIMIT ${numRows} OFFSET ${start}`;
+      const response = await conn.query(query);
       const rows = [];
       for (let i = 0; i < response.numRows; i++) {
         rows.push(response.get(i)?.toJSON()!);