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<?php
namespace Bitrix\Perfmon\Sql;
class Sequence extends BaseObject
{
/**
* Creates sequence object from tokens.
* <p>
* Current position should point to the name of the sequence.
*
* @param Tokenizer $tokenizer Tokens collection.
*
* @return Sequence
*/
public static function create(Tokenizer $tokenizer)
{
$name = $tokenizer->getCurrentToken()->text;
$sequence = new self($name);
$tokenizer->resetState();
$definition = '';
while (!$tokenizer->endOfInput())
{
$definition .= $tokenizer->getCurrentToken()->text;
$tokenizer->nextToken();
}
$sequence->setBody($definition);
return $sequence;
}
/**
* Return DDL for sequence creation.
*
* @param string $dbType Database type (ORACLE only).
*
* @return array|string
*/
public function getCreateDdl($dbType = '')
{
switch ($dbType)
{
case "ORACLE":
return $this->body;
default:
return "// ".get_class($this).":getDropDdl for database type [".$dbType."] not implemented";
}
}
/**
* Return DDL for sequence destruction.
*
* @param string $dbType Database type (ORACLE only).
*
* @return array|string
*/
public function getDropDdl($dbType = '')
{
switch ($dbType)
{
case "ORACLE":
return "DROP SEQUENCE ".$this->name;
default:
return "// ".get_class($this).":getDropDdl for database type [".$dbType."] not implemented";
}
}
/**
* Return DDL for sequence modification (drop with subsequent create).
*
* @param BaseObject $target Target object.
* @param string $dbType Database type (ORACLE only).
*
* @return array|string
*/
public function getModifyDdl(BaseObject $target, $dbType = '')
{
switch ($dbType)
{
case "ORACLE":
return array(
$this->getDropDdl($dbType),
$target->getCreateDdl($dbType),
);
default:
return "// ".get_class($this).":getDropDdl for database type [".$dbType."] not implemented";
}
}
}