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CREATE TABLE t1(a int) ENGINE=EXAMPLE; ERROR 42000: Unknown storage engine 'EXAMPLE' INSTALL PLUGIN example SONAME 'ha_example.so'; INSTALL PLUGIN EXAMPLE SONAME 'ha_example.so'; ERROR HY000: Function 'EXAMPLE' already exists UNINSTALL PLUGIN example; INSTALL PLUGIN example SONAME 'ha_example.so'; # Example engine does not support indexes CREATE TABLE t1 (a int PRIMARY KEY) ENGINE=EXAMPLE; ERROR 42000: Too many key parts specified; max 0 parts allowed CREATE TABLE t1 (a int, KEY (a)) ENGINE=EXAMPLE; ERROR 42000: Too many key parts specified; max 0 parts allowed CREATE TABLE t1(a int) ENGINE=EXAMPLE; SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL ) ENGINE=EXAMPLE DEFAULT CHARSET=latin1 # Let's do some advanced ops with the example engine :) INSERT INTO t1 VALUES (0); # Only supports table scans (and does always return zero rows :) SELECT * FROM t1; a SELECT * FROM t1 WHERE a = 0; a # Since there are no rows found, it will never do update_row. UPDATE t1 SET a = 1 WHERE a = 0; # Since there are no rows found, it will never do delete_row. DELETE FROM t1 WHERE a = 0; # No support for SQL HANDLER statement HANDLER t1 OPEN; ERROR HY000: Table storage engine for 't1' doesn't have this option DROP TABLE t1; set global example_ulong_var=500; set global example_enum_var= e1; show status like 'example%'; Variable_name Value example_func_example enum_var is 0, ulong_var is 500, double_var is 8.500000, really show variables like 'example%'; Variable_name Value example_double_thdvar 8.500000 example_double_var 8.500000 example_enum_var e1 example_ulong_var 500 UNINSTALL PLUGIN example; UNINSTALL PLUGIN EXAMPLE; ERROR 42000: PLUGIN EXAMPLE does not exist UNINSTALL PLUGIN non_exist; ERROR 42000: PLUGIN non_exist does not exist # # Bug#32034: check_func_enum() does not check correct values but set it # to impossible int val # INSTALL PLUGIN example SONAME 'ha_example.so'; SET GLOBAL example_enum_var= e1; SET GLOBAL example_enum_var= e2; SET GLOBAL example_enum_var= impossible; ERROR 42000: Variable 'example_enum_var' can't be set to the value of 'impossible' UNINSTALL PLUGIN example; INSTALL PLUGIN example SONAME 'ha_example.so'; select @@session.sql_mode into @old_sql_mode; set session sql_mode=''; set global example_ulong_var=500; select @@global.example_ulong_var; @@global.example_ulong_var 500 set global example_ulong_var=1111; Warnings: Warning 1292 Truncated incorrect example_ulong_var value: '1111' select @@global.example_ulong_var; @@global.example_ulong_var 1000 set session sql_mode='STRICT_ALL_TABLES'; set global example_ulong_var=500; select @@global.example_ulong_var; @@global.example_ulong_var 500 set global example_ulong_var=1111; ERROR 42000: Variable 'example_ulong_var' can't be set to the value of '1111' select @@global.example_ulong_var; @@global.example_ulong_var 500 set session sql_mode=@old_sql_mode; set session old=bla; ERROR HY000: Variable 'old' is a read only variable UNINSTALL PLUGIN example; # # Bug #16194302 SUPPORT FOR FLOATING-POINT SYSTEM # VARIABLES USING THE PLUGIN INTERFACE. # INSTALL PLUGIN example SONAME 'ha_example.so'; SET GLOBAL example_double_var = -0.1; Warnings: Warning 1292 Truncated incorrect example_double_var value: '-0.1' SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 0.500000 SET GLOBAL example_double_var = 0.000001; Warnings: Warning 1292 Truncated incorrect example_double_var value: '0.000001' SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 0.500000 SET GLOBAL example_double_var = 0.4; Warnings: Warning 1292 Truncated incorrect example_double_var value: '0.4' SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 0.500000 SET GLOBAL example_double_var = 123.456789; SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 123.456789 SET GLOBAL example_double_var = 500; SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 500.000000 SET GLOBAL example_double_var = 999.999999; SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 999.999999 SET GLOBAL example_double_var = 1000.51; Warnings: Warning 1292 Truncated incorrect example_double_var value: '1000.51' SELECT @@GLOBAL.example_double_var; @@GLOBAL.example_double_var 1000.500000 SET SESSION example_double_thdvar = -0.1; Warnings: Warning 1292 Truncated incorrect example_double_thdvar value: '-0.1' SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 0.500000 SET SESSION example_double_thdvar = 0.000001; Warnings: Warning 1292 Truncated incorrect example_double_thdvar value: '0.000001' SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 0.500000 SET SESSION example_double_thdvar = 0.4; Warnings: Warning 1292 Truncated incorrect example_double_thdvar value: '0.4' SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 0.500000 SET SESSION example_double_thdvar = 123.456789; SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 123.456789 SET SESSION example_double_thdvar = 500; SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 500.000000 SET SESSION example_double_thdvar = 999.999999; SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 999.999999 SET SESSION example_double_thdvar = 1000.51; Warnings: Warning 1292 Truncated incorrect example_double_thdvar value: '1000.51' SELECT @@SESSION.example_double_thdvar; @@SESSION.example_double_thdvar 1000.500000 UNINSTALL PLUGIN example; # # BUG#18008907 - DEADLOCK BETWEEN MYSQL_CHANGE_USER(), SHOW VARIABLES AND INSTALL PLUGIN # CREATE PROCEDURE p_install() BEGIN INSTALL PLUGIN no_such_plugin SONAME 'no_such_object'; END | CREATE PROCEDURE p_show_vars() BEGIN SELECT COUNT(*) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES; END| connect con1, localhost, root,,; # Case 18008907_1: Deadlock situation cause by # con1: has LOCK_system_variables_hash and waits on LOCK_plugin AND # default: has LOCK_plugin and waits on LOCK_system_variables_hash. # SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR cont_show_vars'; call p_show_vars();; connection default; SET DEBUG_SYNC='now WAIT_FOR install_plugin'; SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL cont_show_vars'; call p_install();; connection con1; COUNT(*) # SET DEBUG_SYNC='RESET'; connection default; ERROR HY000: Can't open shared library SET DEBUG_SYNC='RESET'; # Case 18008907_2: Deadlock situation caused by # default: has LOCK_system_variables_hash and waits on LOCK_global_system_variables, # con1: has LOCK_plugin and waits on LOCK_system_variables_hash AND # con2: has LOCK_global_system_variables and waits on LOCK_plugin. SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR nothing TIMEOUT 10'; call p_show_vars();; connection con1; SET DEBUG_SYNC='now WAIT_FOR install_plugin'; SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL create_connection WAIT_FOR nothing TIMEOUT 10'; call p_install();; connect con2, localhost, root,,; SET DEBUG_SYNC='now WAIT_FOR create_connection'; connection con1; ERROR HY000: Can't open shared library connection default; COUNT(*) # Warnings: # 1639 debug sync point wait timed out disconnect con2; # Case 18008907_3: Testing Concurrent "Show Variables" and "Plugin Uninstall" operations. INSTALL PLUGIN example SONAME 'ha_example.so'; connection con1; SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL uninstall_plugin WAIT_FOR go'; call p_show_vars();; connect con2, localhost, root,,; SET DEBUG_SYNC='now WAIT_FOR uninstall_plugin'; UNINSTALL PLUGIN example;; connection default; SET DEBUG_SYNC='now SIGNAL go'; connection con1; COUNT(*) # connection con2; connection default; DROP PROCEDURE p_show_vars; DROP PROCEDURE p_install; SET DEBUG_SYNC='RESET'; disconnect con1; disconnect con2;