Update of /cvsroot/monetdb/pathfinder/compiler/core
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv15416/compiler/core
Modified Files:
Tag: Aug2009_NFI
fs.brg
Log Message:
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 fs.brg
Index: fs.brg
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/core/fs.brg,v
retrieving revision 1.74
retrieving revision 1.74.8.1
diff -u -d -r1.74 -r1.74.8.1
--- fs.brg 7 May 2009 14:26:48 -0000 1.74
+++ fs.brg 28 Sep 2009 23:20:25 -0000 1.74.8.1
@@ -46,6 +46,7 @@
#include "abssyn.h"
#include "qname.h"
#include "mem.h"
+#include "string_utils.h" /* trimming for pragmas */
/* PFcnode_t */
#include "core.h"
@@ -3214,18 +3215,31 @@
/* ExtensionExpr: ext_expr (Pragmas, Expr) */
case 211:
+ /* We only understand caching pragmas */
+ if (C(L(p))) {
+ PFfun_t *cache = function (PFqname (PFns_pf, "query-cache"));
+ C(p) = APPLY (cache, C(L(p)), C(R(p)));
+ }
/* Just ignore the pragma. We don't understand it anyway. */
- C(p) = C(R(p));
+ else
+ C(p) = C(R(p));
break;
/* Pragmas: nil */
case 212:
/* We don't understand pragmas anyway */
+ C(p) = NULL;
break;
/* Pragmas: pragmas (pragma, Pragmas) */
case 213:
- /* We don't understand pragmas anyway */
+ if (PFqname_eq (L(p)->sem.pragma.qn.qname,
+ PFqname (PFns_lib, "cache")) == 0)
+ C(p) = str (PFstrUtils_trim_spaces (
+ PFstrdup (L(p)->sem.pragma.content)));
+ else
+ /* We don't understand pragmas anyway */
+ C(p) = C(R(p));
break;
/* DeclImport: RevalidationDecl */
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