recompose this grid

testing results for: sql
lab04
Int-Fed-i64
sql/test/wlcr29.752 
wlr20 X X1.374 
wlr30 X X1.040 
wlr40 X O0.714 
wlr50 X O0.686 
wlr70 X O4.819 
wlr100 X O5.623 
72353 (linear-hashing)