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Change bitfields in Item to an uint16

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The reason for the change is that neither clang or gcc can do efficient
code when several bit fields are change at the same time or when copying
one or more bits between identical bit fields.
Updated bits explicitely with & and | is MUCH more efficient than what
current compilers can do.
This commit is contained in:
Michael Widenius
2020-08-02 12:31:14 +03:00
committed by Sergei Golubchik
parent 451c4ae548
commit 3105c9e7a5
49 changed files with 1240 additions and 1109 deletions
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4
sql/sql_table.cc
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@ -11816,12 +11816,12 @@ bool mysql_checksum_table(THD *thd, TABLE_LIST *tables,
field_list.push_back(item= new (thd->mem_root)
Item_empty_string(thd, "Table", NAME_LEN*2),
thd->mem_root);
item->maybe_null= 1;
item->flags|= ITEM_FLAG_MAYBE_NULL;
field_list.push_back(item= new (thd->mem_root)
Item_int(thd, "Checksum", (longlong) 1,
MY_INT64_NUM_DECIMAL_DIGITS),
thd->mem_root);
item->maybe_null= 1;
item->flags|= ITEM_FLAG_MAYBE_NULL;
if (protocol->send_result_set_metadata(&field_list,
Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
DBUG_RETURN(TRUE);