Adapter

class OC\DB\Adapter
This handles the way we use to write queries, into something that can be
handled by the database abstraction layer.
Source:lib/private/DB/Adapter.php#40

Properties

protected static property OC\DB\Adapter::$conn
Source:lib/private/DB/Adapter.php#45
Type:\OC\DB\Connection

Methods

public OC\DB\Adapter::__construct($conn)
Source:lib/private/DB/Adapter.php#47
public OC\DB\Adapter::lastInsertId($table)
Source:

lib/private/DB/Adapter.php#57
Parameters:
  • $table (string) name
Returns:

int id of last insert statement
Throws:

\Doctrine\DBAL\Exception
public OC\DB\Adapter::fixupStatement($statement)
Source:

lib/private/DB/Adapter.php#65
Parameters:
  • $statement (string) that needs to be changed so the db can handle it
Returns:

string changed statement
public OC\DB\Adapter::lockTable($tableName)
Create an exclusive read+write lock on a table
Source:

lib/private/DB/Adapter.php#76
Parameters:
  • $tableName (string)
Throws:

\Doctrine\DBAL\Exception
Since:

9.1.0
public OC\DB\Adapter::unlockTable()
Release a previous acquired lock again
Source:lib/private/DB/Adapter.php#87
Throws:\Doctrine\DBAL\Exception
Since:9.1.0
public OC\DB\Adapter::insertIfNotExist($table, $input, $compare=null)
Insert a row if the matching row does not exists. To accomplish proper race condition avoidance
it is needed that there is also a unique constraint on the values. Then this method will
catch the exception and return 0.
Source:

lib/private/DB/Adapter.php#105
Parameters:
  • $table (string) The table name (will replace PREFIX with the actual prefix)
  • $input (array) data that should be inserted into the table (column name => value)
  • $compare (array | null) List of values that should be checked for “if not exists”

If this is null or an empty array, all keys of $input will be compared Please note: text fields (clob) must not be used in the compare array
Returns:

int number of inserted rows
Throws:

\Doctrine\DBAL\Exception
Deprecated:

15.0.0 - use unique index and “try { $db->insert() } catch (UniqueConstraintViolationException $e) }” instead, because it is more reliable and does not have the risk for deadlocks - see https://github.com/nextcloud/server/pull/12371
public OC\DB\Adapter::insertIgnoreConflict($table, $values)
Source:lib/private/DB/Adapter.php#141
Throws:\OCP\DB\Exception