清空表格 删除表格

se {
    if ($wildcard) {
      if ($cid == '*') {
        db_query("TRUNCATE TABLE {". $table ."}");
      }
      else {
        db_query("DELETE FROM {". $table ."} WHERE cid LIKE '%s%%'", $cid);
      }
    }
    else {
      db_query("DELETE FROM {". $table ."} WHERE cid = '%s'", $cid);
    }
cache.inc 大约169行左右


function db_drop_table(&$ret, $table) {
  $ret[] = update_sql('DROP TABLE {' . $table . '}');
}
来自 https://api.drupal.org/api/drupal/includes!database.pgsql.inc/function/db_drop_table/6

function update_sql($sql) {
  $result = db_query($sql, true);
  return array(
    'success' => $result !== FALSE,
    'query' => check_plain($sql),
  );
}
来自 https://api.drupal.org/api/drupal/includes!database.inc/function/update_sql/6