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CREATE TABLE t1(a int) ENGINE=BLACKHOLE;
Warnings:
Warning 1286 Unknown storage engine 'BLACKHOLE'
Warning 1266 Using storage engine MyISAM for table 't1'
DROP TABLE t1;
INSTALL PLUGIN blackhole SONAME 'ha_blackhole.so';
INSTALL PLUGIN BLACKHOLE SONAME 'ha_blackhole.so';
ERROR HY000: Plugin 'BLACKHOLE' already installed
UNINSTALL PLUGIN blackhole;
INSTALL PLUGIN blackhole SONAME 'ha_blackhole.so';
CREATE TABLE t1(a int) ENGINE=BLACKHOLE;
DROP TABLE t1;
SELECT 1;
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UNINSTALL PLUGIN blackhole;
UNINSTALL PLUGIN blackhole;
ERROR 42000: PLUGIN blackhole does not exist
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