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[ticket/15047] Do not set default for identity cols

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This commit is contained in:
David Colón 2017-01-25 16:45:04 -05:00
parent c53054f2b7
commit fae78b4c01
1 changed files with 32 additions and 1 deletions
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33
phpBB/phpbb/db/tools/mssql.php
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@ -597,7 +597,7 @@ class mssql extends tools
// Change the column
$statements[] = 'ALTER TABLE [' . $table_name . '] ALTER COLUMN [' . $column_name . '] ' . $column_data['column_type_sql'];
if (!empty($column_data['default']))
if (!empty($column_data['default']) && !$this->mssql_is_column_identity($table_name, $column_name))
{
// Add new default value constraint
$statements[] = 'ALTER TABLE [' . $table_name . '] ADD CONSTRAINT [DF_' . $table_name . '_' . $column_name . '_1] ' . $column_data['default'] . ' FOR [' . $column_name . ']';
@ -674,6 +674,37 @@ class mssql extends tools
return $statements;
}
/**
* Checks to see if column is an identity column
*
* Identity columns cannot have defaults set for them.
*
* @param string $table_name
* @param string $column_name
* @return bool true if identity, false if not
*/
protected function mssql_is_column_identity($table_name, $column_name)
{
if ($this->mssql_is_sql_server_2000())
{
// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
// Deprecated in SQL Server 2005
$sql = "SELECT COLUMNPROPERTY(object_id('{$table_name}'), '{$column_name}', 'IsIdentity') AS is_identity";
}
else
{
$sql = "SELECT is_identity FROM sys.columns
WHERE object_id = object_id('{$table_name}')
AND name = '{$column_name}'";
}
$result = $this->db->sql_query($sql);
$is_identity = $this->db->sql_fetchfield('is_identity');
$this->db->sql_freeresult($result);
return (bool)$is_identity;
}
/**
* Get a list with existing indexes for the column
*