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UPG_INT_BRI_GET_TABNAME - Get physical table name for a table on the bridge system (ZDM)
UPG_IS_BRIDGE_SYSTEM - Check, if the system is a bridge system (ZDM)
UPG_IS_SHADOW_SYSTEM - Prüft, ob man sich im Schattensystem befindet
UPG_IS_TMP_SYSTEM - Check, if the current system the temporal system of an upgrade
Return Table index