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merge

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sql/item_subselect.cc:
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sql/sql_select.cc:
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2004-03-15 13:16:40 +02:00
parent 50499c6d7b ecfaa75221
commit a1b3a5da1c
4 changed files with 80 additions and 5 deletions
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8
sql/sql_select.cc
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@ -3266,8 +3266,12 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
keyuse,join->const_table_map,
&keyinfo->key_part[i],
(char*) key_buff,maybe_null);
/* Remmeber if we are going to use REF_OR_NULL */
if (keyuse->optimize & KEY_OPTIMIZE_REF_OR_NULL)
/*
Remmeber if we are going to use REF_OR_NULL
But only if field _really_ can be null i.e. we force JT_REF
instead of JT_REF_OR_NULL in case if field can't be null
*/
if (keyuse->optimize & KEY_OPTIMIZE_REF_OR_NULL && maybe_null)
null_ref_key= key_buff;
key_buff+=keyinfo->key_part[i].store_length;
}