Update of /cvsroot/monetdb/pathfinder/compiler/algebra/opt
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv1809/compiler/algebra/opt
Modified Files:
Tag: Nov2009
opt_general.brg
Log Message:
propagated changes of Monday Sep 28 2009 - Wednesday Oct 07 2009
from the Aug2009_NFI branch to the Nov2009 branch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2009/09/28 - boncz: compiler/algebra/opt/opt_general.brg,1.69.6.1
optimizations for NFI XIRAF use case -- thanks a great bunch Jan R.!!
- ds_link (already in Stable) optimized for 1-node case
- indices now contain all data (but still not used automatically, nor based
on Lefteris' new indexing schemes)
most prominently though is: subexpression result caching
- caching hints in pragmas
- query enclosed in (# pf:session id:msec ) { query } or (# pf:session-use
id:msec ) { query }
+ queries in the same session use the same working set (documents opened
only once)
+ same working set allows to cache results
+ pf:session-use only uses cache, cannot add to it
- but, multiple pf:session-use can run concurrently; whereas pf:session
is exclusive
- inside a query, an arbitrary number of expressions can be marked up for
caching/reuse
+ (# pf:cache id ) { subexpr }
+ subexpr may not be enclosed by a for-loop
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
U opt_general.brg
Index: opt_general.brg
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/algebra/opt/opt_general.brg,v
retrieving revision 1.69
retrieving revision 1.69.4.1
diff -u -d -r1.69 -r1.69.4.1
--- opt_general.brg 24 Jun 2009 12:15:34 -0000 1.69
+++ opt_general.brg 7 Oct 2009 13:44:46 -0000 1.69.4.1
@@ -139,8 +139,9 @@
%term frag_extract = 72
%term frag_union = 73
%term empty_frag = 74
-%term error = 79
-%term nil = 80
+%term error = 78
+%term nil = 79
+%term cache = 80
%term trace = 81
%term trace_items = 82
%term trace_msg = 83
@@ -246,17 +247,18 @@
Side: error (Side, Rel) = 91 (10);
Side: nil = 92 (10);
-Side: trace (Side, Trc) = 93 (10);
-Trc: trace_items (Rel, Msg) = 94 (10);
-Msg: trace_msg (Rel, Map) = 95 (10);
-Map: trace_map (Rel, Map) = 96 (10);
-Map: nil = 97 (10);
+Side: cache (Side, Rel) = 93 (10);
+Side: trace (Side, Trc) = 94 (10);
+Trc: trace_items (Rel, Msg) = 95 (10);
+Msg: trace_msg (Rel, Map) = 96 (10);
+Map: trace_map (Rel, Map) = 97 (10);
+Map: nil = 98 (10);
-Rel: rec_fix (side_effects (Side, Rec), Rel) = 98 (10);
-Rel: rec_base = 99 (10);
-Rec: rec_param (Arg, Rec) = 100 (10);
-Rec: nil = 101 (10);
-Arg: rec_arg (Rel, Rel) = 102 (10);
+Rel: rec_fix (side_effects (Side, Rec), Rel) = 99 (10);
+Rel: rec_base = 100 (10);
+Rec: rec_param (Arg, Rec) = 101 (10);
+Rec: nil = 102 (10);
+Arg: rec_arg (Rel, Rel) = 103 (10);
Rel: fun_call (Rel, Param) = 105 (10);
Param: fun_param (Rel, Param) = 106 (10);
------------------------------------------------------------------------------
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