Update of /cvsroot/monetdb/pathfinder/compiler/include
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv32460/compiler/include
Modified Files:
Tag: M5XQ
logical.h
Log Message:
propagated changes of Monday Oct 05 2009
from the development trunk to the M5XQ branch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2009/10/05 - sjoerd: compiler/include/logical.h,1.70
propagated changes of Monday Sep 28 2009 - Monday Oct 05 2009
from the Aug2009_NFI branch to the development trunk
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2009/09/28 - boncz: compiler/include/logical.h,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 logical.h
Index: logical.h
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/include/logical.h,v
retrieving revision 1.68.2.1
retrieving revision 1.68.2.2
diff -u -d -r1.68.2.1 -r1.68.2.2
--- logical.h 15 Jun 2009 12:47:21 -0000 1.68.2.1
+++ logical.h 5 Oct 2009 12:14:56 -0000 1.68.2.2
@@ -148,8 +148,9 @@
union of fragments */
, la_empty_frag = 74 /**< representation of an empty fragment */
- , la_error = 79 /**< facility to trigger runtime errors */
- , la_nil = 80 /**< end of the list of parameters */
+ , la_error = 78 /**< facility to trigger runtime errors */
+ , la_nil = 79 /**< end of the list of parameters */
+ , la_cache = 80 /**< cache operator */
, la_trace = 81 /**< debug operator */
, la_trace_items = 82 /**< debug items operator */
, la_trace_msg = 83 /**< debug message operator */
@@ -426,6 +427,13 @@
PFalg_col_t col; /**< column of error message */
} err;
+ /* semantic content for cache operator */
+ struct {
+ char * id; /**< the cache id */
+ PFalg_col_t pos; /**< position column */
+ PFalg_col_t item; /**< item column */
+ } cache;
+
/* semantic content for debug relation map operator */
struct {
PFalg_col_t inner; /**< name of the inner column */
@@ -577,8 +585,9 @@
* or below a `rec_fix' operator if the side effects appear in the recursion
* body.
* The `side_effects' operator contains a (possibly empty) list of operations
- * that may trigger side effects (operators `error' and `trace') in its left
- * child and the fragment or recursion parameters in the right child.
+ * that may trigger side effects (operators `error', `cache' and `trace')
+ * in its left child and the fragment or recursion parameters in the right
+ * child.
*/
PFla_op_t * PFla_side_effects (const PFla_op_t *side_effects,
const PFla_op_t *params);
@@ -1134,6 +1143,15 @@
PFla_op_t *PFla_nil (void);
/**
+ * Constructor for a caching operator
+ */
+PFla_op_t *PFla_cache (const PFla_op_t *n1,
+ const PFla_op_t *n2,
+ char *id,
+ PFalg_col_t pos,
+ PFalg_col_t item);
+
+/**
* Constructor for debug operator
*/
PFla_op_t * PFla_trace (const PFla_op_t *n1,
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