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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 schemas as 'database'. |
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* NB: if used with Oracle >= 12, usernames have to be prefixed with c## to be 'common' (ie. in the CDB), so you might |
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* want to run everything inside a pdb... |
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*/ |
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class Oracle 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 username AS Database FROM all_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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* Returns the sql 'action' used to create a new db and accompanying user |
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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 != '' && $userName != $dbName) { |
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throw new \Exception("Can not create a database (schema) on Oracle with a different accompanying user"); |
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} |
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// NB: if we use a quoted identifier for the username, logging in becomes more difficult, as it will require quotes too... |
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$statements = [ |
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"CREATE USER $dbName IDENTIFIED BY \"$password\";", |
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"GRANT CONNECT, RESOURCE TO $dbName;", |
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"GRANT UNLIMITED TABLESPACE TO $dbName;", |
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]; |
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return new Command($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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* @bug $ifExists = true not supported |
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* @throws \Exception |
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* @todo prevent sql injection! |
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*/ |
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public function getDropDatabaseSqlAction($dbName, $userName, $ifExists = false) |
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{ |
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if ($userName != '' && $userName != $dbName) { |
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throw new \Exception("Can not drop a database (schema) on Oracle with a different accompanying user"); |
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} |
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/// @todo check support for IF EXISTS |
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$statements = [ |
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"DROP USER $dbName CASCADE;", |
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]; |
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return new Command($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 sys.all_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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* @bug $ifExists = true not supported |
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* @todo prevent sql injection! |
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* @todo we should somehow warn users that this destroys the schema too |
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*/ |
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public function getDropUserSqlAction($userName, $ifExists = false) |
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{ |
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/// @todo check support for IF EXISTS |
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return new Command([ |
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"DROP USER $userName CASCADE;", |
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]); |
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} |
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/** |
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* Returns the sql 'action' used to list all available collations |
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* @return Command |
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*/ |
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public function getListCollationsSqlAction() |
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{ |
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return new Command( |
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"SELECT value AS Collation FROM v\$nls_valid_values WHERE parameter = 'CHARACTERSET' ORDER BY value;", |
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function ($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($charset)); |
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164
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// accept official iana charset name, but most dbs prefer 'utf8'... |
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if ($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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