Add missing doc changes

Signed-off-by: Joas Schilling <coding@schilljs.com>

diff --git a/lib/private/DB/MigrationService.php b/lib/private/DB/MigrationService.php
index fb7b6b7472fba677b47d53834bb7872122faab74..92f45dfdbe83a7b2d8380e7769127c0f0bbe9d98 100644 (file)
--- a/lib/private/DB/MigrationService.php
+++ b/lib/private/DB/MigrationService.php
@@ -559,9 +559,13 @@ class MigrationService {
         * - Primary key names must be set or the table name 23 chars or shorter
         *
         * Data constraints:
+        * - Tables need a primary key (Not specific to Oracle, but required for performant clustering support)
         * - Columns with "NotNull" can not have empty string as default value
         * - Columns with "NotNull" can not have number 0 as default value
         * - Columns with type "bool" (which is in fact integer of length 1) can not be "NotNull" as it can not store 0/false
+        * - Columns with type "string" can not be longer than 4.000 characters, use "text" instead
+        *
+        * @see https://github.com/nextcloud/documentation/blob/master/developer_manual/basics/storage/database.rst
         *
         * @param Schema $sourceSchema
         * @param Schema $targetSchema