Add output redirection

Author: kesmit13

singlestoredb/magics/run_shared.py

@@ -103,8 +103,13 @@ def get_cells() -> Any:
                     return
                 for cell in nb.cells:
                     if cell.cell_type == 'code':
+                        output_redirect = getattr(
+                            cell, 'metadata', {},
+                        ).get('output_variable', '')
+                        if output_redirect:
+                            output_redirect = f' << {output_redirect}'
                         if getattr(cell, 'metadata', {}).get('language', '') == 'sql':
-                            yield f'%%sql\n{cell.source}'
+                            yield f'%%sql{output_redirect}\n{cell.source}'
                         else:
                             yield cell.source
             else: