bk commit into 5.1 tree (holyfoot:1.2477) BUG#26527

[holyfoot]

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ChangeSet@stripped, 2007-03-11 22:30:54+04:00, holyfoot@stripped +1 -0
  Bug #26527 LOAD DATA INFILE extremely slow with partitioned table
  mysql_load calls hander::start_bulk_insert(0) to prepare caches
  for big inserts. As ha_partition didn't allow these caches
  for underlaying tables, the inserts were much slower

  sql/ha_partition.cc@stripped, 2007-03-11 22:30:51+04:00, holyfoot@stripped +1 -6
    allow using caches for BIG inserts

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	holyfoot
# Host:	hfmain.(none)
# Root:	/home/hf/work/26527/my51-26527

--- 1.86/sql/ha_partition.cc	2007-03-11 22:31:00 +04:00
+++ 1.87/sql/ha_partition.cc	2007-03-11 22:31:00 +04:00
@@ -2865,12 +2865,7 @@ void ha_partition::start_bulk_insert(ha_
   handler **file;
   DBUG_ENTER("ha_partition::start_bulk_insert");
 
-  if (!rows)
-  {
-    /* Avoid allocation big caches in all underlaying handlers */
-    DBUG_VOID_RETURN;
-  }
-  rows= rows/m_tot_parts + 1;
+  rows= rows ? rows/m_tot_parts + 1 : 0;
   file= m_file;
   do
   {