/**
* UpdateStatement ::= UpdateClause [WhereClause]
*/
public function _UpdateStatement()
{
$updateStatement = new AST\UpdateStatement($this->_UpdateClause());
$updateStatement->setWhereClause($this->_lexer->isNextToken(Lexer::T_WHERE) ? $this->_WhereClause() : null);
return $updateStatement;
}
/**
* Walks down an UpdateStatement AST node, thereby generating the appropriate SQL.
*
* @param UpdateStatement
* @return string The SQL.
*/
public function walkUpdateStatement(AST\UpdateStatement $AST)
{
$this->_useSqlTableAliases = false;
// TODO: Ask platform instead?
$sql = $this->walkUpdateClause($AST->getUpdateClause());
if ($whereClause = $AST->getWhereClause()) {
$sql .= $this->walkWhereClause($whereClause);
} else {
if ($discSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias)) {
$sql .= ' WHERE ' . $discSql;
}
}
return $sql;
}
