/**
* UpdateItem ::= [IdentificationVariable "."] {StateField | SingleValuedAssociationField} "=" NewValue
*/
public function _UpdateItem()
{
$peek = $this->_lexer->glimpse();
$identVariable = null;
if ($peek['value'] == '.') {
$this->match(Lexer::T_IDENTIFIER);
$identVariable = $this->_lexer->token['value'];
$this->match('.');
} else {
throw QueryException::missingAliasQualifier();
}
$this->match(Lexer::T_IDENTIFIER);
$field = $this->_lexer->token['value'];
$this->match('=');
$newValue = $this->_NewValue();
$updateItem = new AST\UpdateItem($field, $newValue);
$updateItem->setIdentificationVariable($identVariable);
return $updateItem;
}
