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table checksum background:

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my_checksum() mysys function
   NISAM checksum code moved from mysys to isam/ - it's obsolete
   MyISAM checksum code moved to mysys
   table's checksum accessible from sql layer
   SHOW TABLE STATUS shows checksum (WL#646)
code cleanup
This commit is contained in:
serg@serg.mylan
2003-08-05 21:14:15 +02:00
parent 6ac0c55c10
commit 79922d946a
15 changed files with 119 additions and 85 deletions
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2
sql/sql_select.cc
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@ -2349,7 +2349,7 @@ static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array)
Constant tables are ignored.
To avoid bad matches, we don't make ref_table_rows less than 100.
*/
keyuse->ref_table_rows= ~(table_map) 0; // If no ref
keyuse->ref_table_rows= ~(ha_rows) 0; // If no ref
if (keyuse->used_tables &
(map= (keyuse->used_tables & ~join->const_table_map &
~OUTER_REF_TABLE_BIT)))