public function SimpleSelectClause()
{
$isDistinct = false;
$this->match(Lexer::T_SELECT);
if ($this->_lexer->isNextToken(Lexer::T_DISTINCT)) {
$this->match(Lexer::T_DISTINCT);
$isDistinct = true;
}
return new AST\SimpleSelectClause($this->SimpleSelectExpression(), $isDistinct);
}