public function QueryAlterableInterface::addTag in Drupal 7

Adds a tag to a query.

Tags are strings that identify a query. A query may have any number of tags. Tags are used to mark a query so that alter hooks may decide if they wish to take action. Tags should be all lower-case and contain only letters, numbers, and underscore, and start with a letter. That is, they should follow the same rules as PHP identifiers in general.

Parameters

$tag: The tag to add.

Return value

QueryAlterableInterface The called object.

2 methods override QueryAlterableInterface::addTag()

SelectQuery::addTag in includes/database/select.inc

Adds a tag to a query.

SelectQueryExtender::addTag in includes/database/select.inc

Adds a tag to a query.

File

includes/database/query.inc, line 183

Non-specific Database query code. Used by all engines.

Class

QueryAlterableInterface

Interface for a query that can be manipulated via an alter hook.

Code

public function addTag($tag);