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diff --git a/mysql-test/main/plugin.test b/mysql-test/main/plugin.test
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+--source include/not_windows_embedded.inc
+--source include/have_example_plugin.inc
+
+--error ER_UNKNOWN_STORAGE_ENGINE
+CREATE TABLE t1(a int) ENGINE=EXAMPLE;
+
+INSTALL PLUGIN example SONAME 'ha_example';
+--replace_regex /\.dll/.so/
+--error ER_PLUGIN_INSTALLED
+INSTALL PLUGIN EXAMPLE SONAME 'ha_example';
+
+UNINSTALL PLUGIN example;
+
+INSTALL SONAME 'ha_example';
+--replace_column 5 #
+--replace_regex /\.dll/.so/
+--query_vertical select * from information_schema.plugins where plugin_library like 'ha_example%'
+
+CREATE TABLE t1 (a int) ENGINE=EXAMPLE;
+CREATE TABLE t2 (a int) ENGINE=EXAMPLE;
+FLUSH TABLES;
+
+# Let's do some advanced ops with the example engine :)
+SELECT * FROM t1;
+
+# a couple of tests for variables
+set global example_ulong_var=500;
+set global example_enum_var= e1;
+set session example_int_var= -1;
+show status like 'example%';
+show variables like 'example%';
+
+select @@session.example_int_var;
+
+UNINSTALL SONAME 'ha_example';
+
+# the engine is NOT uninstalled yet,
+# because the table `t1` is open, sitting in the table defintion cache
+
+--replace_column 5 #
+--replace_regex /\.dll/.so/
+--query_vertical select * from information_schema.plugins where plugin_library like 'ha_example%'
+DROP TABLE t1;
+
+# now the engine IS unloaded
+# and the table `t2` belongs to an unknown engine
+
+--replace_column 5 #
+--replace_regex /\.dll/.so/
+--query_vertical select * from information_schema.plugins where plugin_library like 'ha_example%'
+--error ER_UNKNOWN_STORAGE_ENGINE
+SELECT * FROM t2;
+DROP TABLE t2;
+
+
+--error 1305
+UNINSTALL PLUGIN EXAMPLE;
+
+--error 1305
+UNINSTALL PLUGIN non_exist;
+
+#
+# MDEV-3985 crash: uninstall soname 'a'
+#
+--replace_regex /\.dll/.so/
+--error 1305
+UNINSTALL SONAME 'non_exist';
+
+--echo #
+--echo # Bug#32034: check_func_enum() does not check correct values but set it
+--echo #            to impossible int val
+--echo #
+INSTALL PLUGIN example SONAME 'ha_example';
+
+SET GLOBAL example_enum_var= e1;
+SET GLOBAL example_enum_var= e2;
+--error 1231
+SET GLOBAL example_enum_var= impossible;
+
+UNINSTALL PLUGIN example;
+
+
+
+#
+# Bug #32757 hang with sql_mode set when setting some global variables
+#
+INSTALL PLUGIN example SONAME 'ha_example';
+
+select @@session.sql_mode into @old_sql_mode;
+
+# first, try normal sql_mode (no error, send OK)
+set session sql_mode='';
+set global example_ulong_var=500;
+select @@global.example_ulong_var;
+# overflow -- correct value, but throw warning
+set global example_ulong_var=1111;
+select @@global.example_ulong_var;
+
+# now, try STRICT (error occurrs, no message is sent, so send default)
+set session sql_mode='STRICT_ALL_TABLES';
+set global example_ulong_var=500;
+select @@global.example_ulong_var;
+# overflow -- throw warning, do NOT change value
+--error ER_WRONG_VALUE_FOR_VAR
+set global example_ulong_var=1111;
+select @@global.example_ulong_var;
+
+set session sql_mode=@old_sql_mode;
+
+# finally, show that conditions that already raised an error are not
+# adversely affected (error was already sent, do nothing)
+--error ER_WRONG_VALUE_FOR_VAR
+set session old=bla;
+
+###############################################################
+# engine-specific clauses in the CREATE TABLE:
+
+--echo #legal values
+CREATE TABLE t1 ( a int complex='c,f,f,f' ) ENGINE=example ULL=10000 STR='dskj' one_or_two='one' YESNO=0;
+show create table t1;
+drop table t1;
+
+SET @OLD_SQL_MODE=@@SQL_MODE;
+SET SQL_MODE='IGNORE_BAD_TABLE_OPTIONS';
+
+--echo #illegal value fixed
+CREATE TABLE t1 (a int, b int) ENGINE=example ULL=10000000000000000000 one_or_two='ttt' YESNO=SSS;
+show create table t1;
+
+--echo #alter table
+alter table t1 ULL=10000000;
+show create table t1;
+alter table t1 change a a int complex='c,c,c';
+show create table t1;
+alter table t1 one_or_two=two;
+show create table t1;
+drop table t1;
+
+--echo #illegal value error
+SET SQL_MODE='';
+--error ER_BAD_OPTION_VALUE
+CREATE TABLE t1 (a int) ENGINE=example ULL=10000000000000000000 one_or_two='ttt' YESNO=SSS;
+
+--error ER_PARSE_ERROR
+CREATE TABLE t1 (a int) ENGINE=example ULL=10.00;
+
+--error ER_PARSE_ERROR
+CREATE TABLE t1 (a int) ENGINE=example ULL=1e2;
+
+CREATE TABLE t1 (a int) ENGINE=example ULL=0x1234;
+SHOW CREATE TABLE t1;
+SET example_varopt_default=33; # does not affect varopt of t1
+
+select create_options from information_schema.tables where table_schema='test' and table_name='t1';
+
+ALTER TABLE t1 ULL=DEFAULT;
+SHOW CREATE TABLE t1;
+
+DROP TABLE t1;
+
+create table t1 (a int) engine=example; # varopt is 10
+show create table t1;
+drop table t1;
+
+create table t1 (a int) engine=example varopt=15;
+show create table t1;
+alter table t1 varopt=default;
+show create table t1;
+drop table t1;
+
+SET @@SQL_MODE=@OLD_SQL_MODE;
+
+#
+# The only preparable statement above was CREATE TABLE. 
+# We need to prepare another statement here to force the
+# previous one to be deallocated (mysqltest reuses the same handle)
+# and to unlock all thread-local plugin locks. Otherwise the plugin won't
+# uninstall.
+#
+select 1;
+UNINSTALL PLUGIN example;
+
+--echo #
+--echo # Bug #16194302  SUPPORT FOR FLOATING-POINT SYSTEM
+--echo #                VARIABLES USING THE PLUGIN INTERFACE.
+--echo #
+
+--replace_regex /\.dll/.so/
+eval INSTALL PLUGIN example SONAME 'ha_example';
+
+SET GLOBAL example_double_var = -0.1;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 0.000001;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 0.4;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 123.456789;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 500;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 999.999999;
+SELECT @@GLOBAL.example_double_var;
+
+SET GLOBAL example_double_var = 1000.51;
+SELECT @@GLOBAL.example_double_var;
+
+SET SESSION example_double_thdvar = -0.1;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 0.000001;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 0.4;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 123.456789;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 500;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 999.999999;
+SELECT @@SESSION.example_double_thdvar;
+
+SET SESSION example_double_thdvar = 1000.51;
+SELECT @@SESSION.example_double_thdvar;
+
+UNINSTALL PLUGIN example;
+
+#
+# MDEV-4573 UNINSTALL PLUGIN misleading error message for non-dynamic plugins
+#
+--error ER_PLUGIN_DELETE_BUILTIN
+UNINSTALL PLUGIN MyISAM;
+
+#
+# MDEV-4529 Assertion `tmp->state == 4' fails on mix of INSTALL SONAME / UNINSTALL PLUGIN
+#
+
+select plugin_name from information_schema.plugins where plugin_library like 'ha_example%';
+install soname 'ha_example';
+select plugin_name from information_schema.plugins where plugin_library like 'ha_example%';
+uninstall plugin example;
+select plugin_name from information_schema.plugins where plugin_library like 'ha_example%';
+install soname 'ha_example';
+select plugin_name from information_schema.plugins where plugin_library like 'ha_example%';
+uninstall soname 'ha_example';
+select plugin_name from information_schema.plugins where plugin_library like 'ha_example%';
+
+
+--echo #
+--echo # MDEV-5309 - RENAME TABLE does not check for existence of the table's
+--echo #             engine
+--echo #
+INSTALL PLUGIN example SONAME 'ha_example';
+CREATE TABLE t1(a INT) ENGINE=EXAMPLE;
+SELECT * FROM t1;
+FLUSH TABLES;
+UNINSTALL PLUGIN example;
+--error ER_NO_SUCH_TABLE
+RENAME TABLE t1 TO t2;
+DROP TABLE t1;