public &Select::getUnion() Returns

public Condition::andConditionGroup() Creates

Interface for a conditional clause in a query. Hierarchy interface \Drupal\Core\Database\Query\

public SelectExtender::orConditionGroup()

public SelectExtender::hasAnyTag()

public SelectExtender::extend($extender_name)

public Condition::conditionGroupFactory($conjunction = 'AND')

public SelectExtender::preExecute(SelectInterface $query = NULL)

public Merge::execute() Runs the query

public PagerSelectExtender::element($element)