Function validate_format_params

contrib/formatter_fixedwidth/fixedwidth.c:336–377

* validate_format_params * * verifies that every field specified in the table creation list is also present in the formatting string * and vice versa */

 * and vice versa
 */
static void
validate_format_params(FormatConfig *format_in_config, TupleDesc tupdesc)
{
	ListCell   *l;
	int num_fields_in_format_string = list_length(format_in_config->fldNames);
	int num_fields_in_table_list = tupdesc->natts;
	
	if (num_fields_in_format_string != num_fields_in_table_list)
	{
		ereport(ERROR,
				(errcode(ERRCODE_UNDEFINED_COLUMN),
				 errmsg("mismatch in column length specification"),
				 errdetail("The fixed width formatter requires a length specification for each one of the "
						   "external table columns being used (currently %d, however format string has %d).",
						   num_fields_in_table_list, num_fields_in_format_string)));
	}
	
	foreach(l, format_in_config->fldNames)
	{
		int i;
		bool is_in_both_lists = false;
		char *name = strVal(lfirst(l));
		for (i = 0; i < num_fields_in_table_list; i++)
		{
			if (namestrcmp(&(TupleDescAttr(tupdesc, i)->attname), name) == 0)
			{
				is_in_both_lists = true;
				break;
			}			
		}
		
		if (is_in_both_lists == false)
		{
			ereport(ERROR,
					(errcode(ERRCODE_UNDEFINED_COLUMN),
					 errmsg("missing column definition in length specification"),
					 errdetail("The fixed width formatter requires a length specification for each one of the "
							   "external table columns being used (missing field \"%s\").",
							   name)));
		}
	}
}

static void
init_format_in_config(FormatConfig *format_in_config, int ncolumns, TupleDesc tupdesc, FunctionCallInfo fcinfo)