From: Date: September 29 2008 3:42pm
Subject: bzr commit into mysql-6.0 branch (hezx:2841) Bug#35843
List-Archive: http://lists.mysql.com/commits/54766
X-Bug: 35843
Message-Id: <200809291342.m8TDgguB009455@mail.hezx.com>
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#At file:///media/sda3/work/mysql/bzrwork/b35843/6.0-5.1.29-rc/

 2841 He Zhenxing	2008-09-29 [merge]
      Merge BUG#35843
modified:
  sql/log_event.cc

=== modified file 'sql/log_event.cc'
--- a/sql/log_event.cc	2008-09-05 13:39:08 +0000
+++ b/sql/log_event.cc	2008-09-29 13:41:17 +0000
@@ -8102,7 +8102,6 @@ Write_rows_log_event::do_before_row_oper
     */
   }
 
-  m_table->file->ha_start_bulk_insert(0);
   /*
     We need TIMESTAMP_NO_AUTO_SET otherwise ha_write_row() will not use fill
     any TIMESTAMP column with data from the row but instead will use
@@ -8256,6 +8255,16 @@ Rows_log_event::write_row(const Relay_lo
   // Temporary fix to find out why it fails [/Matz]
   memcpy(m_table->write_set->bitmap, m_cols.bitmap, (m_table->write_set->n_bits + 7) / 8);
 
+  if (m_curr_row == m_rows_buf)
+  {
+    /* this is the first row to be inserted, we estimate the rows with
+       the size of the first row and use that value to initialize
+       storage engine for bulk insertion */
+    ulong estimated_rows= (m_rows_end - m_curr_row) / (m_curr_row_end - m_curr_row);
+    m_table->file->ha_start_bulk_insert(estimated_rows);
+  }
+  
+  
 #ifndef DBUG_OFF
   DBUG_DUMP("record[0]", table->record[0], table->s->reclength);
   DBUG_PRINT_BITSET("debug", "write_set = %s", table->write_set);