Update of /cvsroot/monetdb/pathfinder/compiler/include
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv2651/compiler/include
Modified Files:
Tag: Nov2009
physical.h
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/include/physical.h,1.56.6.1
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2009/10/06 - boncz: compiler/include/physical.h,1.56.6.2
enable heuristic rewrite value-selections in the algebra backend of
MonetDB/xQuery
has to properly implement pf:attribute(ctx, node, ns1, loc1, ns2, loc2) first,
as only the verion without namespaces was there (that one is now gone).
many restrictions:
- only non-loop-lifted equality tests
- not involving fn:collection or pf:collection (as path reversal in the
latter will never find the supernode)
- not involving any date/time/etc typed expressions (as the indices only work
for string and numerical equality)
went through the testweb and fixed all apparant problems
note the Aug2009_NFI value indices are full; whereas previously they would
omit frequent data items
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
U physical.h
Index: physical.h
===================================================================
RCS file: /cvsroot/monetdb/pathfinder/compiler/include/physical.h,v
retrieving revision 1.56
retrieving revision 1.56.4.1
diff -u -d -r1.56 -r1.56.4.1
--- physical.h 12 Jun 2009 13:06:16 -0000 1.56
+++ physical.h 7 Oct 2009 13:47:27 -0000 1.56.4.1
@@ -110,8 +110,10 @@
, pa_content = 130 /**< constructor content operator (elem|doc) */
, pa_slim_content = 131 /**< shallow constructor content operator */
, pa_merge_adjacent = 132
- , pa_error = 139 /**< error operator */
- , pa_nil = 140 /**< end of the list of parameters */
+ , pa_error = 137 /**< error operator */
+ , pa_nil = 138 /**< end of the list of parameters */
+ , pa_cache = 139 /**< cache operator */
+ , pa_cache_border = 140 /**< cache border operator */
, pa_trace = 141 /**< debug operator */
, pa_trace_items = 142 /**< debug operator */
, pa_trace_msg = 143 /**< debug message operator */
@@ -333,6 +335,12 @@
PFalg_col_t col; /**< error: column of error message */
} err;
+ /* semantic content for cache operator */
+ struct {
+ char * id; /**< the cache id */
+ PFalg_col_t item; /**< item column */
+ } cache;
+
/* semantic content for debug relation map operator */
struct {
PFalg_col_t inner; /**< name of the inner column */
@@ -381,6 +389,7 @@
PFalg_col_t item; /**< column to look up the context nodes */
PFalg_col_t item_doc; /**< column to store the fragment info */
PFalg_col_t item_res; /**< column to store the resulting nodes */
+ const char *ns1, *loc1, *ns2, *loc2;
} vx_lookup;
};
@@ -795,6 +804,17 @@
PFpa_op_t *PFpa_nil (void);
/**
+ * Constructor for cache operator
+ */
+PFpa_op_t * PFpa_cache (const PFpa_op_t *n1, const PFpa_op_t *n2,
+ char *id, PFalg_col_t item);
+
+/**
+ * Constructor for cache border operator
+ */
+PFpa_op_t * PFpa_cache_border (const PFpa_op_t *n);
+
+/**
* Constructor for debug operator
*/
PFpa_op_t * PFpa_trace (const PFpa_op_t *n1, const PFpa_op_t *n2);
@@ -916,7 +936,11 @@
PFalg_col_t item,
PFalg_col_t item_res,
PFalg_col_t item_doc,
- bool id);
+ bool id,
+ const char* ns1,
+ const char* loc1,
+ const char* ns2,
+ const char* loc2);
#endif /* PHYSICAL_H */
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