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Verwandte Themen

Database abstraction layer

Allow the use of different database servers using the same code base.

Code

includes/database/query.inc, line 1025

<?php
public function __toString() {
  // Expressions take priority over literal fields, so we process those first
  // and remove any literal fields that conflict.
  $fields = $this->fields;
  $update_fields = array();
  foreach ($this->expressionFields as $field => $data) {
    $update_fields[] = $field . '=' . $data['expression'];
    unset($fields[$field]);
  }

  $max_placeholder = 0;
  foreach ($fields as $field => $value) {
    $update_fields[] = $field . '=:db_update_placeholder_' . ($max_placeholder++);
  }

  $query = 'UPDATE {' . $this->connection->escapeTable($this->table) . '} SET ' . implode(', ', $update_fields);

  if (count($this->condition)) {
    $this->condition->compile($this->connection);
    // There is an implicit string cast on $this->condition.
    $query .= "\nWHERE " . $this->condition;
  }

  return $query;
}
?>