Database.Algebra.Table.Construct
int
string
bool
double
dec
nat
intT
stringT
boolT
decT
doubleT
natT
dbTable
litTable
litTable'
eqJoin
thetaJoin
semiJoin
antiJoin
rank
difference
rowrank
select
distinct
cross
union
proj
aggr
winFun
rownum
rownum'
thetaJoinM
semiJoinM
antiJoinM
eqJoinM
rankM
differenceM
rowrankM
selectM
distinctM
crossM
unionM
projM
aggrM
winFunM
rownumM
rownum'M