- Added test

- Re-sorted CHANGELOG



git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@286 014f5005-505e-4b48-8d0a-63407b615a7c

CHANGELOG

@@ -1,23 +1,25 @@
 1.0
+- Adds history in the GUI
+- Adds menus to the GUI
+- Checks if given name to relations are valid
+- Discards the old and not so functional tlb format
+- Float type recognition is more robust, now handled using a regexp
+- Date type recognition is more robust, now using a combination of regexp plus date object
+- Integer type recognition now allows negative numbers in relations
+- Rename operations are now much faster, content won't be copied unless subsequent updates, insert, updates or deletes will occur
+- Added testsuite
+- Module parallel does something, can execute queries in parallel
+- Implemented select_union_intersect_subtract general optimization
 - Removed encoding from .desktop file (was deprecated)
 - Added manpage for relational-cli
 - Internally uses set instead of lists to describe relation's content
 - Tuples are internally mapped on tuples and no longer on lists
-- Discards the old and not so functional tlb format
+- Set hash method for the classes
-- Rename will mark the resulting relation as readonly and subsequent updates, insert, updates or deletes will actually copy the content
+- Parsing of strings representing dates is now cached, eliminating the need for double parse
-- Added testsuite
 - Fixed python expression tokenization, now uses native tokenizer
 - Fixed optimization involving selection and parenthesis in the expression (Rev 260)
 - Fixed futile_union_intersection_subtraction optimization that didn't work when selection operator was in the left subtree (Rev 261)
-- Module parallel does something, can execute queries in parallel
+- Restyle of the GUI, splitters added
-- Set hash method for the classes
-- Implemented select_union_intersect_subtract general optimization
-- Float type recognition is more robust, now handled using a regexp
-- Date type recognition is more robust, now using a combination of regexp plus date object
-- Parsing of strings representing dates is now cached, eliminating the need for double parse
-- Restyle of the GUI
-- Adds history in the GUI
-- Checks if given name to relations are valid
 
 0.11
 - Font is set only on windows (Rev 206)

relational/parser.py

@@ -143,8 +143,8 @@ class node (object):
         
     def result_format(self,rels):
         '''This function returns a list containing the fields that the resulting relation will have.
-        Since it needs to know real instances of relations, it requires a dictionary where keys are
+        It requires a dictionary where keys are the names of the relations and the values are
-        the names of the relations and the values are the relation objects.'''
+        the relation objects.'''
         if rels==None:            
             return
         
@@ -205,15 +205,15 @@ class node (object):
                 
             return (le+ self.name +re)
 
-def find_matching_parenthesis(expression,start=0):
+def _find_matching_parenthesis(expression,start=0,openpar=u'(',closepar=u')'):
     '''This function returns the position of the matching
     close parenthesis to the 1st open parenthesis found
     starting from start (0 by default)'''
     par_count=0 #Count of parenthesis
     for i in range(start,len(expression)):
-        if expression[i]=='(':
+        if expression[i]==openpar:
             par_count+=1
-        elif expression[i]==')':
+        elif expression[i]==closepar:
             par_count-=1
             if par_count==0:
                 return i #Closing parenthesis of the parameter
@@ -248,7 +248,7 @@ def tokenize(expression):
     while len(expression)>0:
         if expression.startswith('('): #Parenthesis state
             state=2
-            end=find_matching_parenthesis(expression)
+            end=_find_matching_parenthesis(expression)
             #Appends the tokenization of the content of the parenthesis
             items.append(tokenize(expression[1:end]))
             #Removes the entire parentesis and content from the expression
@@ -259,7 +259,7 @@ def tokenize(expression):
             expression=expression[2:].strip() #Removing operator from the expression
             
             if expression.startswith('('): #Expression with parenthesis, so adding what's between open and close without tokenization
-                par=expression.find('(',find_matching_parenthesis(expression)) 
+                par=expression.find('(',_find_matching_parenthesis(expression)) 
             else: #Expression without parenthesis, so adding what's between start and parenthesis as whole  
                 par=expression.find('(')
             
@@ -322,7 +322,7 @@ def parse(expr):
     
     You can use parenthesis to change priority: a ᐅᐊ (q ᑌ d).
     
-    IMPORTANT: The encoding used by this module is UTF-8
+    IMPORTANT: The encoding used by this module is UTF-8 (all strings must be UTF-8)
     
     EXAMPLES
     σage > 25 and rank == weight(A)

relational_gui/guihandler.py

@@ -36,7 +36,7 @@ class relForm(QtGui.QMainWindow):
         self.undo=None #UndoQueue for queries
         self.selectedRelation=None
         self.ui=ui
-        self.qcounter=1
+        self.qcounter=1 #Query counter
         
     def load_query(self,*index):
         self.ui.txtQuery.setText(self.savedQ.itemData(index[0]).toString())
@@ -168,7 +168,7 @@ class relForm(QtGui.QMainWindow):
         It shouldn't be called giving filename but not giving name.'''
         #Asking for file to load
         if filename==None:
-            filename = QtGui.QFileDialog.getOpenFileName(self,QtGui.QApplication.translate("Form", "Load Relation"),"",QtGui.QApplication.translate("Form", "Relations (*.csv);;Old Relations (*.tlb);;Text Files (*.txt);;All Files (*)"))
+            filename = QtGui.QFileDialog.getOpenFileName(self,QtGui.QApplication.translate("Form", "Load Relation"),"",QtGui.QApplication.translate("Form", "Relations (*.csv);;Text Files (*.txt);;All Files (*)"))
             filename=str(filename.toUtf8())
 
         #Default relation's name

test/skill_of_best_person.query

@@ -0,0 +1 @@
+πname,age,skill((ratings-πid,rating(σ r>rating (ρrating➡r(πrating(ratings )) * ratings)) ᐅᐊ people) ᐅᐊ skills)

test/skill_of_best_person.result

@@ -0,0 +1,4 @@
+name,age,skill
+eve,25,Perl
+eve,25,C
+eve,25,C++