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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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sql/sql_test.cc
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@ -82,7 +82,7 @@ static my_bool print_cached_tables_callback(TDC_element *element,
TABLE *entry;
mysql_mutex_lock(&element->LOCK_table_share);
TDC_element::All_share_tables_list::Iterator it(element->all_tables);
All_share_tables_list::Iterator it(element->all_tables);
while ((entry= it++))
{
THD *in_use= entry->in_use;