set sql_mode=""; CREATE TABLE t1(a int) ENGINE=BLACKHOLE; Warnings: Warning 1286 Unknown storage engine 'BLACKHOLE' Warning 1266 Using storage engine MyISAM for table 't1' set sql_mode=default; 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; 1 1 UNINSTALL PLUGIN blackhole; UNINSTALL PLUGIN blackhole; ERROR 42000: PLUGIN blackhole does not exist