Sigulda VS Union

{"lg_-1":[0,0,0,0],"lg_-1_6":[0,0,0,0]}

{"lg_-1":[1,0,1,2],"lg_-1_6":[1,0,1,2],"lg_323":[1,null,1,2],"lg_323_6":[1,null,1,2]}

{"lg_-1":[0,0,0,0],"lg_-1_6":[0,0,0,0]}

{"lg_-1":[1,0,0,1],"lg_-1_6":[1,0,0,1],"lg_323":[1,null,null,1],"lg_323_6":[1,null,null,1]}

{"lg_-1":[0,0,0,0],"lg_-1_6":[0,0,0,0]}