CHANGELOG.md in alf-0.9.0 vs CHANGELOG.md in alf-0.9.1

@@ -1,63 +1,127 @@
+# 0.9.1 / 2011.07.13
+
+* Enhancements (public APIs)
+
+  * Added the in-memory Alf::Relation data structure and associated tooling.
+    This allows using Alf in a object-oriented usual way, in addition to the
+    functional DSL:
+    
+        Alf.lispy.evaluate {
+          (join (restrict :suppliers, lambda{ status > 10 }), :cities)
+        }
+    
+    is equivalent to
+    
+        suppliers, cities = [...], [...] 
+        suppliers.restrict(lambda{ status > 10 }).join(cities)
+        
+    see README about how to obtain suppliers and cities relations in the first 
+    place.
+  
+  * Summarize now accepts a --allbut option, to specify 'by' attributes from an
+    exclusion perspective
+
+  * .alf files are now evaluated in such a way that backtraces are "traceability
+    friendly"
+
+* Non backward-compatible changes to public APIs
+
+  * Lispy#with has been removed because not being stable enough. The clean way 
+    of reusing sub-queries is as follows (non purely functional, so far)
+    
+        kept_suppliers = (restrict :suppliers, lambda{ status > 10 })
+        with_countries = (join kept_suppliers, :cities)
+        supplying      = (join with_countries, :supplies)
+        (summarize supplying,
+                   [:country],
+                   :which => Agg::group(:pid),
+                   :total => Agg::sum{ qty })
+                   
+  * As a consequence, named data sources (Symbols, like :suppliers above) are 
+    now resolved at compile time, which is less powerful, yet much simpler and
+    sound.
+
+  * Nest and Unnest have been renamed to Wrap and Unwrap respectively. This is
+    to better conform to TUTORIAL D's terminology.
+    
+  * Lispy#chain was kept public in 0.9.0 by error and has been entirely removed 
+    from the DSL.
+
+* Enhancements (internals)
+
+  * Reader.reader delegates to Reader.coerce when its first argument is not 
+    a String. This allows calling Reader.reader(args.first || $stdin) in quickl
+    commands for example.
+    
+  * Operator, Operator::Relational and Operator::NonRelational have a .each 
+    class method that yields operator classes
+    
+* Bug fixes
+
+  * Fixed a bug that led to an Nil error when using unary operators on $stdin
+  * Fixed a bug when summarizing or sorting on Symbol attributes with ruby 1.8
+  * Fixed numerous crashes under rubinius
+
 # 0.9.0 / 2011.06.19
 
 * Enhancements
 
   * Birthday!