Update of /cvsroot/monetdb/pathfinder/compiler
In directory sc8-pr-cvs16.sourceforge.net:/tmp/cvs-serv20494
Modified Files:
main.c
Log Message:
-- Changed type bit representation of nodes and QNames.
o Nodes are now represented by the types aat_anode (attributes)
and aat_pnode (all other nodes) in the logical algebra.
The type aat_node furthermore represents a mix of attributes
and other nodes.
o In the MIL representation aat_anode is split up into
3 bits (aat_attr, aat_pre, and aat_frag) and aat_pnode
is split into 3 bits (aat_pre, aat_frag, and aat_nkind).
The last bit (aat_nkind) is only used to distinct the
types aat_anode and aat_node (aat_anode | aat_pnode).
In the MIL representation a type mask projects it away.
o In the MIL representation the logical QName type aat_qname
is represented by two bits: aat_qname_id and aat_qname_cont.
o In the SQL representation the logical QName type aat_qname
is represented by two bits: aat_qname_loc and aat_qname_uri.
-- Integrated new node and QName type representation in the MIL generation.
-- Completed, cleaned up, and fixed the implementation for
a large number of operators.
-- Removed fragment information from the physical algebra.
(MonetDB only works on a global working set anyway.)
-- Added physical primitive for count aggregates with default
value 0 (pa_count_ext) as this maps to the MIL primitive
'{count}(a,b)' where b represents the loop relation.
-- Replaced multiple physical path steps by a single path
step operator (pa_llscjoin).
-- Removed atom equality functions.
-- Removed dead code (e.g., planning for a nested loop join).
-- Added a genType MIL variable that sets the serialization string.
(Perhaps the mps magic in the embedded variant works.)
-- Added vim fold markers in milgen.brg to make the file more readable.
-- Added some comments on the MIL code generation
(using doxygen comment style).
Index: main.c
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/main.c,v
retrieving revision 1.98
retrieving revision 1.99
diff -u -d -r1.98 -r1.99
--- main.c 8 Feb 2008 22:38:18 -0000 1.98
+++ main.c 15 Feb 2008 16:53:25 -0000 1.99
@@ -280,7 +280,7 @@
* For details on the algebra stuff, please refer to the
* @ref compilation page (algebra/algebra.c).
*
- * @subsection milgen Compilation into a MIL tree
+ * @subsection milgenBrief Compilation into a MIL tree
*
* MIL is Pathfinder's target language. The code in mil/milgen.brg
* translates a physical algebra tree into MIL. We do not, however,
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