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<?php |
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namespace Db3v4l\Core\DatabaseManager; |
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use Db3v4l\API\Interfaces\DatabaseManager; |
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use Db3v4l\API\Interfaces\SqlExecutor\Executor; |
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use Db3v4l\Core\SqlAction\Command; |
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/** |
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* This DBManager uses PDB as 'database'. As such, it does not support oracle <= 11 |
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* Also, Oracle XE has a fairly stringent limit on PDBS that can be concurrently created (3 total in 18c...) |
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*/ |
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class OraclePDB extends BaseManager implements DatabaseManager |
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{ |
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/** |
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* Returns the sql 'action' used to list all available databases |
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* @return Command |
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* @todo (for each database) retrieve the charset/collation |
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*/ |
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public function getListDatabasesSqlAction() |
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{ |
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return new Command( |
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"SELECT pdb_name AS Database FROM dba_pdbs ORDER BY pdb_name;", |
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function ($output, $executor) { |
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/** @var Executor $executor */ |
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return $executor->resultSetToArray($output); |
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} |
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); |
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} |
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/** |
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* Returns the sql 'action' used to create a new db and accompanying user. |
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* NB: the 'new database' is created as pdb and the new user is created as local to the pdb |
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* NB: needs SYS connection... |
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* @param string $dbName |
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* @param string $userName |
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* @param string $password |
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* @param string $charset charset/collation name |
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* @return Command |
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* @throws \Exception |
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* @todo prevent sql injection! |
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*/ |
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public function getCreateDatabaseSqlAction($dbName, $userName, $password, $charset = null) |
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{ |
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//$collation = $this->getCollationName($charset); |
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/// @todo throw if $charset is not the same as the db one |
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if ($userName == '') { |
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throw new \Exception("Can not create a PDB database on Oracle without an accompanying user"); |
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} |
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$statements = [ |
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"CREATE PLUGGABLE DATABASE \"$dbName\" ADMIN USER $userName IDENTIFIED BY \"$password\" CREATE_FILE_DEST='/opt/oracle/oradata';", |
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"ALTER PLUGGABLE DATABASE \"$dbName\" OPEN READ WRITE;" |
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]; |
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return new Command($statements); |
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} |
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/** |
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* Returns the sql 'action' used to drop a db and associated user account |
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* @param string $dbName |
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* @param string $userName |
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* @return Command |
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* @param bool $ifExists |
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* @todo prevent sql injection! |
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*/ |
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public function getDropDatabaseSqlAction($dbName, $userName, $ifExists = false) |
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{ |
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if ($userName != '') { |
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/// @todo check if $userName is not local to $dbName |
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/// select pdb_name from cdb_users, dba_pdbs where dba_pdbs.pdb_id = cdb_users.con_id and username = xxx |
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} |
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/// @todo check support for IF EXISTS |
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$statements = [ |
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"ALTER PLUGGABLE DATABASE \"$dbName\" CLOSE;", |
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"DROP PLUGGABLE DATABASE \"$dbName\" INCLUDING DATAFILES;", |
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]; |
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return new Command($statements); |
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} |
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/** |
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* Returns the sql 'action' used to list all existing db users |
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* @return Command |
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*/ |
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public function getListUsersSqlAction() |
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{ |
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return new Command( |
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// NB: we filter out 'system' users, as there are many... |
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"SELECT username FROM cdb_users WHERE oracle_maintained != 'Y' ORDER BY username;", |
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function ($output, $executor) { |
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/** @var Executor $executor */ |
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return $executor->resultSetToArray($output); |
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} |
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); |
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} |
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/** |
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* @param string $userName |
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* @param bool $ifExists |
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* @return Command |
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* @todo prevent sql injection! |
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*/ |
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public function getDropUserSqlAction($userName, $ifExists = false) |
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{ |
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/// @todo check which pdb the user is in, and switch to it |
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/// select pdb_name from cdb_users, dba_pdbs where dba_pdbs.pdb_id = cdb_users.con_id and username = xxx |
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/// alter session set container = xxx; |
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return new Command([ |
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"DROP USER $userName CASCADE;", |
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]); |
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} |
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/** |
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* Returns the sql 'action' used to list all available ('valid') collations |
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* @return Command |
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*/ |
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public function getListCollationsSqlAction() |
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{ |
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return new Command( |
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"SELECT value AS Collation FROM v\$nls_valid_values WHERE parameter = 'CHARACTERSET' ORDER BY value;", |
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function ($output, $executor) { |
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/** @var Executor $executor */ |
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return $executor->resultSetToArray($output); |
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} |
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); |
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} |
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/** |
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* Returns the sql 'action' used to retrieve the db instance version info |
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* @return Command |
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*/ |
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public function getRetrieveVersionInfoSqlAction() |
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{ |
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return new Command( |
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"SELECT version_full || ' (' || banner || ')' AS version FROM v\$version, v\$instance;", |
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function ($output, $executor) { |
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/** @var Executor $executor */ |
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return $executor->resultSetToArray($output)[0]; |
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} |
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); |
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} |
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/** |
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* Transform collation name into a supported one |
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* @param null|string $charset so far only 'utf8' is supported... |
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* @return null|string |
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* @todo what shall we accept as valid input, ie. 'generic' charset names ? maybe do 2 passes: known-db-charset => generic => specific for each db ? |
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* see: https://www.iana.org/assignments/character-sets/character-sets.xhtml for IANA names |
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*/ |
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/*protected function getCollationName($charset) |
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{ |
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if ($charset == null) { |
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return null; |
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} |
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$charset = trim(strtolower($charset)); |
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// accept official iana charset name, but most dbs prefer 'utf8'... |
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if ($charset == 'utf-8') { |
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$charset = 'utf8'; |
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} |
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if ($charset == 'utf8') { |
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$charset = 'AL32UTF8'; |
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} |
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return $charset; |
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}*/ |
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} |
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gggeek /
db-3v4l
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