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MDEV-5535: Cannot reopen temporary table

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mysqld maintains a list of TABLE objects for all temporary
tables created within a session in THD. Here each table is
represented by a TABLE object.

A query referencing a particular temporary table for more
than once, however, failed with ER_CANT_REOPEN_TABLE error
because a TABLE_SHARE was allocate together with the TABLE,
so temporary tables always had only one TABLE per TABLE_SHARE.

This patch lift this restriction by separating TABLE and
TABLE_SHARE objects and storing TABLE_SHAREs for temporary
tables in a list in THD, and TABLEs in a list within their
respective TABLE_SHAREs.
This commit is contained in:
Nirbhay Choubey
2016-06-10 16:19:59 -04:00
parent 547511153f
commit 7305be2f7e
50 changed files with 2315 additions and 1260 deletions
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4
sql/sql_trigger.cc
View File

@ -24,7 +24,7 @@
#include "sql_parse.h" // parse_sql
#include "parse_file.h"
#include "sp.h"
#include "sql_base.h" // find_temporary_table
#include "sql_base.h"
#include "sql_show.h" // append_definer, append_identifier
#include "sql_table.h" // build_table_filename,
// check_n_cut_mysql50_prefix
@ -507,7 +507,7 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
DBUG_ASSERT(tables->next_global == 0);
/* We do not allow creation of triggers on temporary tables. */
if (create && find_temporary_table(thd, tables))
if (create && thd->find_tmp_table_share(tables))
{
my_error(ER_TRG_ON_VIEW_OR_TEMP_TABLE, MYF(0), tables->alias);
goto end;