(redshift_to_pandas("select '"+all_schema[i]+"' as columns_name,(select exists ( select distinct table_schema from information_schema.tables where table_schema like '%"+all_schema[i]+"')) as status",mechanism='append'))     modified_schemadf.append(redshift_to_pandas("select '"+all_schema[i]+"' as columns_name,(select exists ( select distinct table_schema from information_schema.tables where table_schema like '%"+all_schema[i]+"')) as status",mechanism='append'))     