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<?php |
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namespace Yajra\Oci8\Schema; |
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use Illuminate\Database\Connection; |
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class Sequence |
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{ |
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/** |
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* @var \Illuminate\Database\Connection |
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*/ |
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protected $connection; |
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/** |
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* @param Connection $connection |
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*/ |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* function to create oracle sequence |
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* |
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* @param string $name |
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* @param integer $start |
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* @param boolean $nocache |
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* @return boolean |
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*/ |
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public function create($name, $start = 1, $nocache = false) |
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{ |
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if (! $name) { |
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return false; |
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} |
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$nocache = $nocache ? 'nocache' : ''; |
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return $this->connection->statement("create sequence {$name} start with {$start} {$nocache}"); |
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} |
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/** |
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* function to safely drop sequence db object |
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* |
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* @param string $name |
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* @return boolean |
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*/ |
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public function drop($name) |
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{ |
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// check if a valid name and sequence exists |
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if (! $name or ! $this->exists($name)) { |
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return false; |
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} |
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return $this->connection->statement(" |
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declare |
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e exception; |
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pragma exception_init(e,-02289); |
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begin |
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execute immediate 'drop sequence {$name}'; |
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exception |
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when e then |
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null; |
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end;"); |
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} |
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/** |
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* function to check if sequence exists |
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* |
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* @param string $name |
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* @return boolean |
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*/ |
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public function exists($name) |
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{ |
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if (! $name) { |
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return false; |
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} |
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return $this->connection->selectOne("select * |
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from all_sequences |
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where |
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sequence_name=upper('{$name}') |
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and sequence_owner=upper(user) |
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"); |
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} |
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/** |
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* get sequence next value |
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* |
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* @param string $name |
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* @return integer |
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*/ |
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public function nextValue($name) |
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{ |
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if (! $name) { |
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return 0; |
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} |
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return $this->connection->selectOne("SELECT $name.NEXTVAL as id FROM DUAL")->id; |
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} |
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/** |
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* same function as lastInsertId. added for clarity with oracle sql statement. |
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* |
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* @param string $name |
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* @return integer |
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*/ |
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public function currentValue($name) |
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{ |
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return $this->lastInsertId($name); |
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} |
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/** |
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* function to get oracle sequence last inserted id |
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* |
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* @param string $name |
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* @return integer |
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*/ |
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public function lastInsertId($name) |
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{ |
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// check if a valid name and sequence exists |
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if (! $name or ! $this->exists($name)) { |
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return 0; |
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} |
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return $this->connection->selectOne("select {$name}.currval as id from dual")->id; |
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} |
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} |
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yajra /
laravel-oci8
