Connection::setPrefix

protected Connection::setPrefix($prefix)

protected function setPrefix($prefix) {
  if (is_array($prefix)) {
    $this->prefixes = $prefix + array('default' => '');
  }
  else {
    $this->prefixes = array('default' => $prefix);
  }

  // Set up variables for use in prefixTables(). Replace table-specific
  // prefixes first.
  $this->prefixSearch = array();
  $this->prefixReplace = array();
  foreach ($this->prefixes as $key => $val) {
    if ($key != 'default') {
      $this->prefixSearch[] = '{' . $key . '}';
      $this->prefixReplace[] = $val . $key;
    }
  }
  // Then replace remaining tables with the default prefix.
  $this->prefixSearch[] = '{';
  $this->prefixReplace[] = $this->prefixes['default'];
  $this->prefixSearch[] = '}';
  $this->prefixReplace[] = '';

  // Set up a map of prefixed => un-prefixed tables.
  foreach ($this->prefixes as $table_name => $prefix) {
    if ($table_name !== 'default') {
      $this->unprefixedTablesMap[$prefix . $table_name] = $table_name;
    }
  }
}