protected property Schema::$columnComments in Drupal driver for SQL Server and SQL Azure 8.2
Inside the same transaction, you won't be able to read uncommited extended properties leading to SQL Exception if calling sp_addextendedproperty twice on same object, so we need to keep in memory track.
File
- drivers/
lib/ Drupal/ Driver/ Database/ sqlsrv/ Schema.php, line 37 - Definition of Drupal\Driver\Database\sqlsrv\Schema
Class
Namespace
Drupal\Driver\Database\sqlsrvCode
protected $columnComments = [];