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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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30
mysql-test/suite/rpl/r/rpl_reopen_temp_table.result Normal file
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include/master-slave.inc
[connection master]
connection slave;
reset master;
#
# MDEV-5535: Cannot reopen temporary table
#
connection master;
DROP TABLE IF EXISTS t1, t2, t3;
CREATE TEMPORARY TABLE t1(c1 INT) ENGINE=INNODB;
INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
CREATE TEMPORARY TABLE t2 SELECT A.c1 a, B.c1 b FROM t1 AS A, t1 AS B;
CREATE TABLE t3 SELECT * FROM t2;
SELECT COUNT(*) = 5 FROM t1;
COUNT(*) = 5
1
SELECT COUNT(*) = 25 FROM t2;
COUNT(*) = 25
1
SELECT COUNT(*) = 25 FROM t3;
COUNT(*) = 25
1
connection slave;
SELECT COUNT(*) = 25 FROM t3;
COUNT(*) = 25
1
connection master;
DROP TABLE t1, t2, t3;
connection slave;
include/rpl_end.inc