def eval(self, dyn=None):
if dyn:
from sqlsem import dynamic_binding
dynbt = dynamic_binding(len(dyn), dyn)
else:
# dummy value to prevent triviality
from sqlsem import kjbuckets
dynbt = [kjbuckets.kjDict(Insert_dummy_arg)]
#print "bindings", dynbt.assns
return dynbt # ??
def eval(self, dyn=None):
if dyn:
from sqlsem import dynamic_binding
dynbt = dynamic_binding(len(dyn), dyn)
else:
# dummy value to prevent triviality
from sqlsem import kjbuckets
dynbt = [kjbuckets.kjDict(Insert_dummy_arg)]
#print "bindings", dynbt.assns
return dynbt # ??
def evalcond(cond, eqs, target, dyn, rassns, translate, invtrans):
"""factored out shared op between Update and Delete."""
if dyn:
#print "dyn", dyn
from sqlsem import dynamic_binding
dynbind = dynamic_binding(len(dyn), dyn)
if len(dynbind) > 1:
raise ValueError, "only one dynamic binding allowed for UPDATE"
dynbind1 = dynbind = dynbind[0]
if eqs is not None:
dynbind1 = dynbind.remap(eqs)
if dynbind1 is None:
# inconsistent
return
dynbind = dynbind1 + dynbind
if rassns is not None:
rassns = rassns + invtrans * dynbind
if rassns.Clean() is None:
# inconsistent
return
else:
rassns = invtrans * dynbind
#print "dynbind", dynbind
#print "rassn", rassns
else:
dynbind = None
# get tuple set, try to use an index
index = None
if rassns is not None:
known = rassns.keys()
index = target.choose_index(known)
if index is None:
(tuples, seqnums) = target.rows(1)
else:
#print "using index", index.name
(tuples, seqnums) = index.matches(rassns)
ltuples = len(tuples)
buffer = [0] * ltuples
rtups = range(ltuples)
for i in rtups:
tup = tuples[i]
#print tup
ttup = translate * tup
if dynbind:
ttup = (ttup + dynbind).Clean()
if ttup is not None:
buffer[i] = ttup
#print "buffer", buffer
#print "cond", cond
#for x in buffer:
#print "before", x
test = cond(buffer)
#print "test", test
return (test, rtups, seqnums, tuples)
def evalcond(cond, eqs, target, dyn, rassns, translate, invtrans):
"""factored out shared op between Update and Delete."""
if dyn:
#print "dyn", dyn
from sqlsem import dynamic_binding
dynbind = dynamic_binding(len(dyn), dyn)
if len(dynbind)>1:
raise ValueError, "only one dynamic binding allowed for UPDATE"
dynbind1 = dynbind = dynbind[0]
if eqs is not None:
dynbind1 = dynbind.remap(eqs)
if dynbind1 is None:
# inconsistent
return
dynbind = dynbind1 + dynbind
if rassns is not None:
rassns = rassns + invtrans * dynbind
if rassns.Clean() is None:
# inconsistent
return
else:
rassns = invtrans * dynbind
#print "dynbind", dynbind
#print "rassn", rassns
else:
dynbind = None
# get tuple set, try to use an index
index = None
if rassns is not None:
known = rassns.keys()
index = target.choose_index(known)
if index is None:
(tuples, seqnums) = target.rows(1)
else:
#print "using index", index.name
(tuples, seqnums) = index.matches(rassns)
ltuples = len(tuples)
buffer = [0] * ltuples
rtups = range(ltuples)
for i in rtups:
tup = tuples[i]
#print tup
ttup = translate * tup
if dynbind:
ttup = (ttup + dynbind).Clean()
if ttup is not None:
buffer[i] = ttup
#print "buffer", buffer
#print "cond", cond
#for x in buffer:
#print "before", x
test = cond(buffer)
#print "test", test
return (test, rtups, seqnums, tuples)
