CCF_100/relational
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added __eq__ method to the tree

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git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@147 014f5005-505e-4b48-8d0a-63407b615a7c
This commit is contained in:
LtWorf 2009-05-01 14:45:31 +00:00
parent 7ecf75efb7
commit 04e3b8e316
1 changed files with 11 additions and 0 deletions
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11
relational/optimizer.py
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@ -61,7 +61,17 @@ class node (object):
return return
pass pass
def __eq__(self,other):
if not (isinstance(other,node) and self.name==other.name and self.kind==other.kind):
return False
if self.kind==UNARY:
if other.prop!=self.prop:
return False
return self.child==other.child
if self.kind==BINARY:
return self.left==other.left and self.right==other.right
return True
def __str__(self): def __str__(self):
if (self.kind==RELATION): if (self.kind==RELATION):
return self.name return self.name
@ -182,6 +192,7 @@ if __name__=="__main__":
#a= tokenize("(a - (a ᑌ b) * π a,b (a-b)) - ρ 123 (a)") #a= tokenize("(a - (a ᑌ b) * π a,b (a-b)) - ρ 123 (a)")
#a= tokenize(u"π a,b (a*b)") #a= tokenize(u"π a,b (a*b)")
#a=tokenize("(a-b*c)*(b-c)") #a=tokenize("(a-b*c)*(b-c)")
print tree("σ i==2 (c ᑌ d - (aᑎb))") == tree("σ i==3 (c ᑌ d - (aᑎb))")
a=general_optimize("σ i==2 (c ᑌ d - (aᑎb))") a=general_optimize("σ i==2 (c ᑌ d - (aᑎb))")
#a=general_optimize("σ i==2 (σ b>5 (d))") #a=general_optimize("σ i==2 (σ b>5 (d))")
print a print a