Commit 2ea3916e authored by serg@sergbook.mysql.com's avatar serg@sergbook.mysql.com
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fix for a nasty bag, that causes a memory corruption+crash on HUGE select... 

fix for a nasty bag, that causes a memory corruption+crash on HUGE select distincts, as myisam temp table treats nulls as equal, it constantly returned 141 (duplicate key) error in create_myisam_from_heap
parent 57f32cf8

sql/sql_select.cc

+1 −1
Original line number Diff line number Diff line
@@ -3885,7 +3885,7 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, 
      goto err;

    table->key_info=keyinfo;

    keyinfo->key_part=key_part_info;

    keyinfo->flags=HA_NOSAME;

    keyinfo->flags=HA_NOSAME|HA_NULL_ARE_EQUAL;

    keyinfo->key_length=(uint16) reclength;

    keyinfo->name=(char*) "tmp";

    if (null_pack_length)