Okay, got it fixed. Maybe one of you need this example for joining two tables with CE
data as /********* Begin Procedure Script ************/
BEGIN
var_tableLabor = CE_COLUMN_TABLE ("TBASE_PUBLIC"."development.projects.tbase.data::TBASE.cds.Labor", ["LaborID"]);
var_tableLaborwert = CE_COLUMN_TABLE ("TBASE_PUBLIC"."development.projects.tbase.data::TBASE.cds.Laborwert", ["LaborID"]);
var_out = CE_LEFT_OUTER_JOIN(:var_tableLabor,:var_tableLaborwert,["LaborID"],["LaborID"]);
END /********* End Procedure Script ************/