public SelectExtender::fields($table_alias, array $fields =

An array of fields that will be updated. Type:

public &SelectExtender::getFields()

public Condition::arguments() Gets

An array of fields that should be set to their database-defined defaults. Type:

public Update::expression($field, $expression, array $arguments = NULL)

Condition::__clone() PHP magic

public &SelectInterface::getExpressions()

General class for an abstracted MERGE query operation. An ANSI SQL:2003 compatible database would run the following query:

public QueryConditionTrait::isNotNull($field)