recompose this grid

testing results for: sql
lab01
GNU-Fed-i64
sql/test/wlcr28.994 
wlr20 X X1.495 
wlr30 X X0.961 
wlr40 X O0.632 
wlr50 X O0.622 
wlr70 X O4.755 
wlr100 X O5.550 
72353 (linear-hashing)