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Removed redundant SE lock for tmp tables

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CREATE TEMPORARY TABLE locks SE plugin 6 times. 5 of these locks are
released by the end of the statement. And only 1 acquired by
init_from_binary_frm_image() / plugin_lock() remains.

The lock removed in this patch was clearly redundant.

Part of MDEV-17805 - Remove InnoDB cache for temporary tables.
This commit is contained in:
Sergey Vojtovich
2019-02-06 11:41:36 +04:00
parent 3638636f9b
commit 1dac55cf0e
5 changed files with 45 additions and 21 deletions
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15
mysql-test/main/plugin.result
View File

@ -378,3 +378,18 @@ select PLUGIN_NAME,PLUGIN_STATUS,PLUGIN_TYPE from information_schema.plugins whe
PLUGIN_NAME PLUGIN_STATUS PLUGIN_TYPE
UNINSTALL SONAME 'ha_example';
ERROR 42000: SONAME ha_example.so does not exist
#
# Make sure temporary tables maintain plugin references properly
#
INSTALL PLUGIN example SONAME 'ha_example';
CREATE TEMPORARY TABLE t1(a INT) ENGINE=example;
UNINSTALL PLUGIN example;
Warnings:
Warning 1620 Plugin is busy and will be uninstalled on shutdown
INSTALL PLUGIN example SONAME 'ha_example';
ERROR HY000: Plugin 'example' already installed
DROP TABLE t1;
INSTALL PLUGIN example SONAME 'ha_example';
CREATE TEMPORARY TABLE t1(a INT) ENGINE=example;
DROP TABLE t1;
UNINSTALL PLUGIN example;