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Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
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heikki@hundin.mysql.fi
2004-03-17 19:37:48 +02:00
parent 99d374159a
commit e8efe9c32a
6 changed files with 98 additions and 26 deletions
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sql/sql_select.cc
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@ -845,7 +845,7 @@ JOIN::optimize()
for (uint i_h = const_tables; i_h < tables; i_h++)
{
TABLE* table_h = join_tab[i_h].table;
table_h->file->extra(HA_EXTRA_RETRIEVE_ALL_COLS);
table_h->file->extra(HA_EXTRA_RETRIEVE_PRIMARY_KEY);
}
}
#endif