Raw SQL queries in TYPO3 9 - typo3-9.x

Question

Is there a way to perform raw SQL queries in TYPO3 9?
Something equivalent to $GLOBALS['TYPO3_DB']->sql_query($sql); in previous versions.

Answer 1

In your repository, you can use statement() for this.
Example:
$query = $this->createQuery();
$sql = '
SELECT fieldA, fieldB
FROM table
WHERE
pid = '.$pid.'
AND someField = 'something'
';
$query->statement($sql)->execute();
Make sure, that you take care of sanitizing the input!

Answer 2

THE ORM-concept seems to makes it difficult using raw SQL.
/**
* #param string $tableName
* #return bool
*/
public function createMySplitTable($newTableName = self::TABLENAME)
{
if ($newTableName !== self::TABLENAME) {
$baseTable = self::TABLENAME;
// make a structure-copy of the main table
$sql ="CREATE TABLE $newTableName SELECT * FROM $baseTable AS main LIMIT 0;";
// looky-looky at 20200609: https://www.strangebuzz.com/en/snippets/running-raw-sql-queries-with-doctrine
// seems to work
/** #var Connection $connection */
$connection = GeneralUtility::makeInstance(ConnectionPool::class)
->getConnectionForTable(self::TABLENAME);
/** #var DriverStatement $statement */
$statement = $connection->prepare($sql);
$statement->execute();
// // --- don't work for me :-(
// /** #var QueryBuilder $queryBuilder */
// $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
// ->getQueryBuilderForTable($baseTable);
// $queryBuilder->resetRestrictions();
// $queryBuilder->resetQueryParts();
// $queryBuilder->add($sql,'select'); // Tried some variations
// $queryBuilder->execute();
// // --- don't work for me :-(
// /** #var Query $query */ // Extbase won't work for this query
// $query = $this->createQuery();
// $query->statement($sql);
// $query->execute(true);
// // --- work only for TYPO3 8 and lower
// $GLOBALS['TYPO3_DB']->sql_query($sql); /// < TYPO3 8
//
}
}
Thanks to https://www.strangebuzz.com/en/snippets/running-raw-sql-queries-with-doctrine

Answer 3

you could use the querybuilder with it's method
TYPO3\CMS\Core\Database\Query\QueryBuilder::selectLiteral(string ... $selects).
Be aware:
Specifies items that are to be returned in the query result. Replaces any previously specified selections, if any. This should only be used for literal SQL expressions as no quoting/escaping of any kind will be performed on the items.
There also is
TYPO3\CMS\Core\Database\Query\QueryBuilder::addSelectLiteral(string ... $selects)
Adds an item that is to be returned in the query result. This should only be used for literal SQL expressions as no quoting/escaping of any kind will be performed on the items.