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[ticket/15055] Drop primary keys when necessary and fix test comparisons

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PHPBB3-15055
This commit is contained in:
Marc Alexander
2017-01-29 15:56:45 +01:00
parent 5bb62f5560
commit 635befa00e
2 changed files with 43 additions and 1 deletions
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35
phpBB/phpbb/db/tools/mssql.php
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@@ -448,6 +448,10 @@ class mssql extends tools
}
}
// Drop primary keys depending on this column
$result = $this->mssql_get_drop_default_primary_key_queries($table_name, $column_name);
$statements = array_merge($statements, $result);
// Drop default value constraint
$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
$statements = array_merge($statements, $result);
@@ -684,6 +688,37 @@ class mssql extends tools
return $statements;
}
/**
* Get queries to drop the primary keys depending on the specified column
*
* We need to drop primary keys depending on this column before being able
* to delete them.
*
* @param string $table_name
* @param string $column_name
* @return array Array with SQL statements
*/
protected function mssql_get_drop_default_primary_key_queries($table_name, $column_name)
{
$statements = array();
$sql = "SELECT ccu.CONSTRAINT_NAME, ccu.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu ON tc.CONSTRAINT_NAME = ccu.Constraint_name
WHERE tc.TABLE_NAME = '{$table_name}'
AND tc.CONSTRAINT_TYPE = 'Primary Key'";
$result = $this->db->sql_query($sql);
while ($primary_key = $this->db->sql_fetchrow($result))
{
$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $primary_key['CONSTRAINT_NAME'] . ']';
}
$this->db->sql_freeresult($result);
return $statements;
}
/**
* Checks to see if column is an identity column
*