class InsertQuery_sqlite in Drupal 7

SQLite specific implementation of InsertQuery.

We ignore all the default fields and use the clever SQLite syntax: INSERT INTO table DEFAULT VALUES for degenerated "default only" queries.

Hierarchy

• class \Query implements QueryPlaceholderInterface
  • class \InsertQuery
    • class \InsertQuery_sqlite

Related topics

Database abstraction layer

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

File

includes/database/sqlite/query.inc, line 20

Query code for SQLite embedded database engine.

class InsertQuery_sqlite extends InsertQuery {
  public function execute() {
    if (!$this
      ->preExecute()) {
      return NULL;
    }
    if (count($this->insertFields) || !empty($this->fromQuery)) {
      return parent::execute();
    }
    else {
      return $this->connection
        ->query('INSERT INTO {' . $this->table . '} DEFAULT VALUES', array(), $this->queryOptions);
    }
  }
  public function __toString() {

    // Create a sanitized comment string to prepend to the query.
    $comments = $this->connection
      ->makeComment($this->comments);

    // Produce as many generic placeholders as necessary.
    $placeholders = array();
    if (!empty($this->insertFields)) {
      $placeholders = array_fill(0, count($this->insertFields), '?');
    }

    // If we're selecting from a SelectQuery, finish building the query and
    // pass it back, as any remaining options are irrelevant.
    if (!empty($this->fromQuery)) {
      $insert_fields_string = $this->insertFields ? ' (' . implode(', ', $this->insertFields) . ') ' : ' ';
      return $comments . 'INSERT INTO {' . $this->table . '}' . $insert_fields_string . $this->fromQuery;
    }
    return $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $this->insertFields) . ') VALUES (' . implode(', ', $placeholders) . ')';
  }

}

Members

Name	Modifiers	Type	Description	Overrides
InsertQuery::$defaultFields	protected	property	An array of fields that should be set to their database-defined defaults.
InsertQuery::$fromQuery	protected	property	A SelectQuery object to fetch the rows that should be inserted.
InsertQuery::$insertFields	protected	property	An array of fields on which to insert.
InsertQuery::$insertValues	protected	property	A nested array of values to insert.
InsertQuery::$table	protected	property	The table on which to insert.
InsertQuery::fields	public	function	Adds a set of field->value pairs to be inserted.
InsertQuery::from	public	function	Sets the fromQuery on this InsertQuery object.
InsertQuery::preExecute	public	function	Preprocesses and validates the query.
InsertQuery::useDefaults	public	function	Specifies fields for which the database defaults should be used.
InsertQuery::values	public	function	Adds another set of values to the query to be inserted.
InsertQuery::__construct	public	function	Constructs an InsertQuery object. Overrides Query::__construct
InsertQuery_sqlite::execute	public	function	Executes the insert query. Overrides InsertQuery::execute
InsertQuery_sqlite::__toString	public	function	Implements PHP magic __toString method to convert the query to a string. Overrides InsertQuery::__toString
Query::$comments	protected	property	An array of comments that can be prepended to a query.
Query::$connection	protected	property	The connection object on which to run this query.
Query::$connectionKey	protected	property	The key of the connection object.
Query::$connectionTarget	protected	property	The target of the connection object.
Query::$nextPlaceholder	protected	property	The placeholder counter.
Query::$queryOptions	protected	property	The query options to pass on to the connection object.
Query::$uniqueIdentifier	protected	property	A unique identifier for this query object.
Query::comment	public	function	Adds a comment to the query.
Query::getComments	public	function	Returns a reference to the comments array for the query.
Query::nextPlaceholder	public	function	Gets the next placeholder value for this query object. Overrides QueryPlaceholderInterface::nextPlaceholder
Query::uniqueIdentifier	public	function	Returns a unique identifier for this object. Overrides QueryPlaceholderInterface::uniqueIdentifier
Query::__clone	public	function	Implements the magic __clone function.	1
Query::__sleep	public	function	Implements the magic __sleep function to disconnect from the database.
Query::__wakeup	public	function	Implements the magic __wakeup function to reconnect to the database.