/**
* DeleteStatement ::= DeleteClause [WhereClause]
*/
public function _DeleteStatement()
{
$deleteStatement = new AST\DeleteStatement($this->_DeleteClause());
$deleteStatement->setWhereClause($this->_lexer->isNextToken(Lexer::T_WHERE) ? $this->_WhereClause() : null);
return $deleteStatement;
}
/**
* Walks down a DeleteStatement AST node, thereby generating the appropriate SQL.
*
* @param DeleteStatement
* @return string The SQL.
*/
public function walkDeleteStatement(AST\DeleteStatement $AST)
{
$this->_useSqlTableAliases = false;
// TODO: Ask platform instead?
$sql = $this->walkDeleteClause($AST->getDeleteClause());
if ($whereClause = $AST->getWhereClause()) {
$sql .= $this->walkWhereClause($whereClause);
} else {
if ($discSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias)) {
$sql .= ' WHERE ' . $discSql;
}
}
return $sql;
}