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zYne 2007-01-05 23:42:27 +00:00
parent 3f9565e638
commit 61967bce15
1 changed files with 80 additions and 0 deletions
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82
lib/Doctrine/Sequence/Mssql.php
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@ -32,5 +32,85 @@ Doctrine::autoload('Doctrine_Sequence');
*/
class Doctrine_Sequence_Mssql extends Doctrine_Sequence
{
/**
* Returns the next free id of a sequence
*
* @param string $seqName name of the sequence
* @param bool when true missing sequences are automatic created
*
* @return integer next id in the given sequence
*/
public function nextID($seqName, $ondemand = true)
{
$sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
$seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
if ($this->_checkSequence($sequence_name)) {
$query = "SET IDENTITY_INSERT $sequence_name ON ".
"INSERT INTO $sequence_name ($seqcol_name) VALUES (0)";
} else {
$query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (0)";
}
$result =& $this->_doQuery($query, true);
$this->popExpect();
if (PEAR::isError($result)) {
if ($ondemand && !$this->_checkSequence($sequence_name)) {
$this->loadModule('Manager', null, true);
// Since we are creating the sequence on demand
// we know the first id = 1 so initialize the
// sequence at 2
$result = $this->manager->createSequence($seq_name, 2);
if (PEAR::isError($result)) {
return $this->raiseError($result, null, null,
'nextID: on demand sequence '.$seq_name.' could not be created');
} else {
// First ID of a newly created sequence is 1
return 1;
}
}
return $result;
}
$value = $this->lastInsertID($sequence_name);
if (is_numeric($value)) {
$query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
$result =& $this->_doQuery($query, true);
if (PEAR::isError($result)) {
$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
}
}
return $value;
}
/**
* Returns the autoincrement ID if supported or $id or fetches the current
* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
*
* @param string name of the table into which a new row was inserted
* @param string name of the field into which a new row was inserted
*/
public function lastInsertID($table = null, $field = null)
{
$server_info = $this->getServerVersion();
if (is_array($server_info)
&& !is_null($server_info['major'])
&& $server_info['major'] >= 8) {
$query = "SELECT SCOPE_IDENTITY()";
} else {
$query = "SELECT @@IDENTITY";
}
return $this->queryOne($query, 'integer');
}
/**
* Returns the current id of a sequence
*
* @param string $seqName name of the sequence
*
* @return integer current id in the given sequence
*/
public function currID($seqName)
{
$this->warnings[] = 'database does not support getting current
sequence value, the sequence value was incremented';
return $this->nextID($seqName);
}
}