[OXID eShop] check if a table column exists, e.g. for module activatin / deactivation events

check if a column exists

$oDb = oxDb::getDb();
$oRs = $oDb->metaColumnNames("tablename");

// check for lower case and upper case column name
if (!array_key_exists("columnname", $oRs) && !array_key_exists("COLUMNNAME", $oRs)) {
{
	// column does not exists
	// do something
}