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MDEV-4260 Don't create frm files for temporary tables

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* Don't write frm for tmp tables
* pass frm image down to open_table_uncached, when possible
* don't use truncate-by-recreate for temp tables - cannot recreate
  without frm, and delete_all_rows is faster anyway
This commit is contained in:
Sergei Golubchik
2014-06-20 11:34:24 +02:00
parent cc5b3998b6
commit ce6a63ec41
7 changed files with 55 additions and 75 deletions
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9
sql/sql_table.cc
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@ -4847,7 +4847,7 @@ int create_table_impl(THD *thd,
THD::temporary_tables list.
*/
TABLE *table= open_table_uncached(thd, create_info->db_type, path,
TABLE *table= open_table_uncached(thd, create_info->db_type, frm, path,
db, table_name, true, true);
if (!table)
@ -8691,7 +8691,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
// We assume that the table is non-temporary.
DBUG_ASSERT(!table->s->tmp_table);
if (!(altered_table= open_table_uncached(thd, new_db_type,
if (!(altered_table= open_table_uncached(thd, new_db_type, &frm,
alter_ctx.get_tmp_path(),
alter_ctx.new_db,
alter_ctx.tmp_name,
@ -8845,7 +8845,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
if (create_info->tmp_table())
{
if (!open_table_uncached(thd, new_db_type,
if (!open_table_uncached(thd, new_db_type, &frm,
alter_ctx.get_tmp_path(),
alter_ctx.new_db, alter_ctx.tmp_name,
true, true))
@ -8867,7 +8867,8 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
{
/* table is a normal table: Create temporary table in same directory */
/* Open our intermediate table. */
new_table= open_table_uncached(thd, new_db_type, alter_ctx.get_tmp_path(),
new_table= open_table_uncached(thd, new_db_type, &frm,
alter_ctx.get_tmp_path(),
alter_ctx.new_db, alter_ctx.tmp_name,
true, true);
}