From f63352d37b3ffe7b4e420ee84830e18c45a9cf2c Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 13 May 2004 01:38:40 +0400 Subject: This is first cset for WL#1394 "Optimize index merge when all involved index ranges include only values with equal keys" The main idea is to exploit the fact that key scans for "key=const" return ordered sequences of rowids. include/my_base.h: Added HA_EXTRA_KEYREAD_PRESERVE_FIELDS flag include/my_bitmap.h: Added a couple of utility functions include/my_sys.h: Added my_conunt_bits_ushort function innobase/include/row0mysql.h: Added support for HA_EXTRA_KEYREAD_PRESERVE_FIELDS innobase/row/row0sel.c: Added support for HA_EXTRA_KEYREAD_PRESERVE_FIELDS mysys/my_bit.c: Added my_count_bits_ushort function mysys/my_bitmap.c: Added a couple of utility functions sql/ha_berkeley.cc: Added cmp_ref rowid comparison function. sql/ha_berkeley.h: Added cmp_ref rowid comparison function. sql/ha_heap.h: Added cmp_ref rowid comparison function. sql/ha_innodb.cc: Added cmp_ref rowid comparison function and support from HA_EXTRA_KEYREAD_PRESERVE_FIELDS sql/ha_innodb.h: Added cmp_ref rowid comparison function. sql/handler.h: Added cmp_ref rowid comparison function. sql/opt_range.cc: Added QUICK_ROR_{INTERSECT,UNION}_SELECT classes and related optimizer code sql/opt_range.h: Added QUICK_ROR_{INTERSECT,UNION}_SELECT classes sql/sql_delete.cc: Changed to use new ROWID comparison function also always call quick->reset() for quick selects sql/sql_select.cc: Account for new quick select types sql/sql_select.h: New, proper rowid ordering/comparison function to be used with Unique class etc. sql/sql_test.cc: Account for new quick select types sql/sql_update.cc: Account for new quick select types --- sql/ha_heap.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'sql/ha_heap.h') diff --git a/sql/ha_heap.h b/sql/ha_heap.h index c369c7029b4..80cd143eec3 100644 --- a/sql/ha_heap.h +++ b/sql/ha_heap.h @@ -93,5 +93,10 @@ class ha_heap: public handler THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type); - + int cmp_ref(const byte *ref1, const byte *ref2) + { + HEAP_PTR ptr1=*(HEAP_PTR*)ref1; + HEAP_PTR ptr2=*(HEAP_PTR*)ref2; + return ptr1 < ptr2? -1 : (ptr1 > ptr2? 1 : 0); + } }; -- cgit v1.2.1