* rename all debugging related command-line options
and variables to start from "debug-", and made them all
OFF by default.
* replace "MySQL" with "MariaDB" in error messages
* "Cast ... converted ... integer to it's ... complement"
is now a note, not a warning
* @@query_cache_strip_comments now has a session scope,
not global.
SYNTAX TRIGGERS IN ANY WAY
Table with triggers which were using deprecated (5.0-only) syntax became
unavailable for any DML and DDL after upgrade to 5.1 version of server.
Attempt to execute any statement on such a table resulted in parsing
error reported. Since this included DROP TRIGGER and DROP TABLE
statements (actually, the latter was allowed but was not functioning
properly for such tables) it was impossible to fix the problem without
manual operations on .TRG and .TRN files in data directory.
The problem was that failure to parse trigger body (due to 5.0-only
syntax) when opening trigger file for a table prevented the table
from being open. This made all operations on the table impossible
(except DROP TABLE which due to peculiarity in its implementation
dropped the table but left trigger files around).
This patch solves this problem by silencing error which occurs when
we parse trigger body during table open. Error message is preserved
for the future use and table is marked as having a broken trigger.
We also try to analyze parse tree to recover trigger name, which
will be needed in order to drop the broken trigger. DML statements
which invoke triggers on the table marked as having broken trigger
are prohibited and emit saved error message. The same happens for
DDL which change triggers except DROP TRIGGER and DROP TABLE which
try their best to do what was requested. Table becomes no longer
marked as having broken trigger when last such trigger is dropped.
mysql-test/r/trigger-compat.result:
Add results for test case for bug#45235
mysql-test/t/trigger-compat.test:
Add test case for bug#45235.
sql/sp_head.cc:
Added protection against MEM_ROOT double restoring to
sp_head::restore_thd_mem_root() method. Since this
method can be sometimes called twice during parsing
of stored routine (the first time during normal flow
of parsing, and the second time when a syntax error
is detected) we need to shortcut execution of the
method to avoid damaging MEM_ROOT by the second
consecutive call to this method.
sql/sql_trigger.cc:
Added error handler Deprecated_trigger_syntax_handler to
catch non-OOM errors during parsing of trigger body.
Added handling of parse errors into method
Table_triggers_list::check_n_load().
sql/sql_trigger.h:
Added new members to handle broken triggers and error messages.
Replaced Unix calls with mysql-test-run's built-in functions / SQL manipulation where possible.
Replaced error codes with error names as well.
Disabled two tests on Windows due to more complex Unix command usage
See Bug#41307, Bug#41308
- BUG#11986: Stored routines and triggers can fail if the code
has a non-ascii symbol
- BUG#16291: mysqldump corrupts string-constants with non-ascii-chars
- BUG#19443: INFORMATION_SCHEMA does not support charsets properly
- BUG#21249: Character set of SP-var can be ignored
- BUG#25212: Character set of string constant is ignored (stored routines)
- BUG#25221: Character set of string constant is ignored (triggers)
There were a few general problems that caused these bugs:
1. Character set information of the original (definition) query for views,
triggers, stored routines and events was lost.
2. mysqldump output query in client character set, which can be
inappropriate to encode definition-query.
3. INFORMATION_SCHEMA used strings with mixed encodings to display object
definition;
1. No query-definition-character set.
In order to compile query into execution code, some extra data (such as
environment variables or the database character set) is used. The problem
here was that this context was not preserved. So, on the next load it can
differ from the original one, thus the result will be different.
The context contains the following data:
- client character set;
- connection collation (character set and collation);
- collation of the owner database;
The fix is to store this context and use it each time we parse (compile)
and execute the object (stored routine, trigger, ...).
2. Wrong mysqldump-output.
The original query can contain several encodings (by means of character set
introducers). The problem here was that we tried to convert original query
to the mysqldump-client character set.
Moreover, we stored queries in different character sets for different
objects (views, for one, used UTF8, triggers used original character set).
The solution is
- to store definition queries in the original character set;
- to change SHOW CREATE statement to output definition query in the
binary character set (i.e. without any conversion);
- introduce SHOW CREATE TRIGGER statement;
- to dump special statements to switch the context to the original one
before dumping and restore it afterwards.
Note, in order to preserve the database collation at the creation time,
additional ALTER DATABASE might be used (to temporary switch the database
collation back to the original value). In this case, ALTER DATABASE
privilege will be required. This is a backward-incompatible change.
3. INFORMATION_SCHEMA showed non-UTF8 strings
The fix is to generate UTF8-query during the parsing, store it in the object
and show it in the INFORMATION_SCHEMA.
Basically, the idea is to create a copy of the original query convert it to
UTF8. Character set introducers are removed and all text literals are
converted to UTF8.
This UTF8 query is intended to provide user-readable output. It must not be
used to recreate the object. Specialized SHOW CREATE statements should be
used for this.
The reason for this limitation is the following: the original query can
contain symbols from several character sets (by means of character set
introducers).
Example:
- original query:
CREATE VIEW v1 AS SELECT _cp1251 'Hello' AS c1;
- UTF8 query (for INFORMATION_SCHEMA):
CREATE VIEW v1 AS SELECT 'Hello' AS c1;
client/mysqldump.c:
Set original character set and collation before dumping definition query.
include/my_sys.h:
Move out-parameter to the end of list.
mysql-test/lib/mtr_report.pl:
Ignore server-warnings during the test case.
mysql-test/r/create.result:
Update result file.
mysql-test/r/ctype_cp932_binlog_stm.result:
Update result file.
mysql-test/r/events.result:
Update result file.
mysql-test/r/events_bugs.result:
Update result file.
mysql-test/r/events_grant.result:
Update result file.
mysql-test/r/func_in.result:
Update result file.
mysql-test/r/gis.result:
Update result file.
mysql-test/r/grant.result:
Update result file.
mysql-test/r/information_schema.result:
Update result file.
mysql-test/r/information_schema_db.result:
Update result file.
mysql-test/r/lowercase_view.result:
Update result file.
mysql-test/r/mysqldump.result:
Update result file.
mysql-test/r/ndb_sp.result:
Update result file.
mysql-test/r/ps.result:
Update result file.
mysql-test/r/rpl_replicate_do.result:
Update result file.
mysql-test/r/rpl_sp.result:
Update result file.
mysql-test/r/rpl_trigger.result:
Update result file.
mysql-test/r/rpl_view.result:
Update result file.
mysql-test/r/show_check.result:
Update result file.
mysql-test/r/skip_grants.result:
Update result file.
mysql-test/r/sp-destruct.result:
Update result file.
mysql-test/r/sp-error.result:
Update result file.
mysql-test/r/sp-security.result:
Update result file.
mysql-test/r/sp.result:
Update result file.
mysql-test/r/sql_mode.result:
Update result file.
mysql-test/r/system_mysql_db.result:
Update result file.
mysql-test/r/temp_table.result:
Update result file.
mysql-test/r/trigger-compat.result:
Update result file.
mysql-test/r/trigger-grant.result:
Update result file.
mysql-test/r/trigger.result:
Update result file.
mysql-test/r/view.result:
Update result file.
mysql-test/r/view_grant.result:
Update result file.
mysql-test/t/events.test:
Update test case (new columns added).
mysql-test/t/information_schema.test:
Update test case (new columns added).
mysql-test/t/show_check.test:
Test case for SHOW CREATE TRIGGER in prepared statements and
stored routines.
mysql-test/t/sp-destruct.test:
Update test case (new columns added).
mysql-test/t/sp.test:
Update test case (new columns added).
mysql-test/t/view.test:
Update test.
mysys/charset.c:
Move out-parameter to the end of list.
scripts/mysql_system_tables.sql:
Add new columns to mysql.proc and mysql.event.
scripts/mysql_system_tables_fix.sql:
Add new columns to mysql.proc and mysql.event.
sql/event_data_objects.cc:
Support new attributes for events.
sql/event_data_objects.h:
Support new attributes for events.
sql/event_db_repository.cc:
Support new attributes for events.
sql/event_db_repository.h:
Support new attributes for events.
sql/events.cc:
Add new columns to SHOW CREATE event resultset.
sql/mysql_priv.h:
1. Introduce Object_creation_ctx;
2. Introduce SHOW CREATE TRIGGER;
3. Introduce auxilary functions.
sql/sp.cc:
Add support for new store routines attributes.
sql/sp_head.cc:
Add support for new store routines attributes.
sql/sp_head.h:
Add support for new store routines attributes.
sql/sql_lex.cc:
Generate UTF8-body on parsing/lexing.
sql/sql_lex.h:
1. Generate UTF8-body on parsing/lexing.
2. Introduce SHOW CREATE TRIGGER.
sql/sql_parse.cc:
Introduce SHOW CREATE TRIGGER.
sql/sql_partition.cc:
Update parse_sql().
sql/sql_prepare.cc:
Update parse_sql().
sql/sql_show.cc:
Support new attributes for views
sql/sql_trigger.cc:
Support new attributes for views
sql/sql_trigger.h:
Support new attributes for views
sql/sql_view.cc:
Support new attributes for views
sql/sql_yacc.yy:
1. Add SHOW CREATE TRIGGER statement.
2. Generate UTF8-body for views, stored routines, triggers and events.
sql/table.cc:
Introduce Object_creation_ctx.
sql/table.h:
Introduce Object_creation_ctx.
sql/share/errmsg.txt:
Add new errors.
mysql-test/include/ddl_i18n.check_events.inc:
Aux file for test suite.
mysql-test/include/ddl_i18n.check_sp.inc:
Aux file for test suite.
mysql-test/include/ddl_i18n.check_triggers.inc:
Aux file for test suite.
mysql-test/include/ddl_i18n.check_views.inc:
Aux file for test suite.
mysql-test/include/have_cp1251.inc:
Aux file for test suite.
mysql-test/include/have_cp866.inc:
Aux file for test suite.
mysql-test/include/have_koi8r.inc:
Aux file for test suite.
mysql-test/include/have_utf8.inc:
Aux file for test suite.
mysql-test/r/ddl_i18n_koi8r.result:
Result file.
mysql-test/r/ddl_i18n_utf8.result:
Result file.
mysql-test/r/have_cp1251.require:
Aux file for test suite.
mysql-test/r/have_cp866.require:
Aux file for test suite.
mysql-test/r/have_koi8r.require:
Aux file for test suite.
mysql-test/r/have_utf8.require:
Aux file for test suite.
mysql-test/t/ddl_i18n_koi8r.test:
Complete koi8r test case for the CS patch.
mysql-test/t/ddl_i18n_utf8.test:
Complete utf8 test case for the CS patch.
into neptunus.(none):/home/msvensson/mysql/mysql-5.1-new
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/ps_1general.result:
Auto merged
mysql-test/r/query_cache.result:
Auto merged
mysql-test/r/rpl_loaddata_m.result:
Auto merged
mysql-test/r/sp-security.result:
Auto merged
mysql-test/r/variables.result:
Auto merged
mysql-test/r/view_grant.result:
Auto merged
mysql-test/t/query_cache.test:
Auto merged
mysql-test/t/read_only.test:
Auto merged
mysql-test/t/sp-security.test:
Auto merged
mysql-test/t/trigger-compat.test:
Auto merged
mysql-test/t/view_grant.test:
Auto merged
mysql-test/r/trigger-compat.result:
Merge 5.0 -> 5.1
Implement table-level TRIGGER privilege to control access to triggers.
Before this path global SUPER privilege was used for this purpose, that
was the big security problem.
In details, before this patch SUPER privilege was required:
- for the user at CREATE TRIGGER time to create a new trigger;
- for the user at DROP TRIGGER time to drop the existing trigger;
- for the definer at trigger activation time to execute the trigger (if the
definer loses SUPER privilege, all its triggers become unavailable);
This patch changes the behaviour in the following way:
- TRIGGER privilege on the subject table for trigger is required:
- for the user at CREATE TRIGGER time to create a new trigger;
- for the user at DROP TRIGGER time to drop the existing trigger;
- for the definer at trigger activation time to execute the trigger
(if the definer loses TRIGGER privilege on the subject table, all its
triggers on this table become unavailable).
- SUPER privilege is still required:
- for the user at CREATE TRIGGER time to explicitly set the trigger
definer to the user other than CURRENT_USER().
When the server works with database of the previous version (w/o TRIGGER
privilege), or if the database is being upgraded from the previous versions,
TRIGGER privilege is granted to whose users, who have CREATE privilege.
mysql-test/r/grant.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/information_schema.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/lowercase_table_grant.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/ps.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/sp.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/trigger-compat.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/r/trigger-grant.result:
Updated the result file after adding TRIGGER privilege.
mysql-test/t/trigger-compat.test:
Grant table-level TRIGGER privilege instead of global SUPER one.
mysql-test/t/trigger-grant.test:
1. Grant table-level TRIGGER privilege instead of global SUPER one.
2. Updated the test case to check that SUPER is required to specify
the user other than the current as a definer.
scripts/mysql_create_system_tables.sh:
Added TRIGGER privilege.
scripts/mysql_fix_privilege_tables.sql:
Added TRIGGER privilege.
sql/sql_acl.cc:
Added TRIGGER privilege.
sql/sql_acl.h:
Added TRIGGER privilege.
sql/sql_show.cc:
Added TRIGGER privilege.
sql/sql_trigger.cc:
Check TRIGGER privilege instead of SUPER.
sql/sql_yacc.yy:
Added TRIGGER privilege.
into neptunus.(none):/home/msvensson/mysql/mysqltest_var/my50-mysqltest_var-integration
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/query_cache.result:
Auto merged
mysql-test/r/rpl000001.result:
Auto merged
mysql-test/r/rpl_loaddata.result:
Auto merged
mysql-test/r/rpl_loaddata_rule_m.result:
Auto merged
mysql-test/r/rpl_loaddata_rule_s.result:
Auto merged
mysql-test/r/rpl_misc_functions.result:
Auto merged
mysql-test/r/rpl_replicate_do.result:
Auto merged
mysql-test/r/sp-security.result:
Auto merged
mysql-test/r/variables.result:
Auto merged
mysql-test/r/view_grant.result:
Auto merged
mysql-test/t/query_cache.test:
Auto merged
mysql-test/t/rpl000001.test:
Auto merged
mysql-test/t/rpl_loaddata.test:
Auto merged
mysql-test/t/rpl_loaddata_rule_m.test:
Auto merged
mysql-test/t/rpl_loaddata_rule_s.test:
Auto merged
mysql-test/t/rpl_misc_functions.test:
Auto merged
mysql-test/t/rpl_replicate_do.test:
Auto merged
mysql-test/t/sp-security.test:
Auto merged
mysql-test/t/trigger-compat.test:
Auto merged
mysql-test/r/trigger-compat.result:
Merge
Cleanup the sideeffects from most of the testcases with sideeffects.
mysql-test/mysql-test-run.pl:
Add option "check-testcases" to mysql-test-run.pl
Will execute "include/check-testcase.test" once before each tescase and record the output into "var/tmp/check-testcase.result"
After the teastcase it will run again and this time compare the output with previously recorded file.
mysql-test/r/analyze.result:
Drop table t1 at end of test
mysql-test/r/create_select_tmp.result:
Drop table t1 at end of test
mysql-test/r/ctype_cp932.result:
Drop table t1 at end of test
mysql-test/r/ctype_recoding.result:
Drop table t1 at end of test
mysql-test/r/grant2.result:
Drop user mysqltest_2 and mysqltest_A@'%'
mysql-test/r/join_outer.result:
Drop view v1 to cleanup
mysql-test/r/ps_1general.result:
Drop table t1 at end of test
mysql-test/r/query_cache.result:
Drop function "f1"
mysql-test/r/read_only.result:
Reset the "read_only" flag
mysql-test/r/rpl000001.result:
Remove user "blafasel2"
mysql-test/r/rpl000017.result:
Remove user "replicate"
mysql-test/r/rpl_failed_optimize.result:
Drop table t1 to cleanup
mysql-test/r/rpl_flush_tables.result:
Drop tables t3, t4, t5
mysql-test/r/rpl_ignore_revoke.result:
Delete user "user_foo"
mysql-test/r/rpl_insert_id.result:
Drop table t1 to cleanup
mysql-test/r/rpl_loaddata.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_loaddata_rule_m.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_loaddata_rule_s.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_misc_functions.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_multi_update3.result:
Drop tyable t1 and t2 to cleanup
mysql-test/r/rpl_replicate_do.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_skip_error.result:
Drop tyable t1 to cleanup
mysql-test/r/rpl_slave_status.result:
Drop tyable t1 to cleanup
mysql-test/r/sp-prelocking.result:
Drop view v1 and tables t1, t2, t3 and t4 to cleanup
mysql-test/r/sp-security.result:
Delete users to cleanup
Delete remaining traces in tables_priv and procs_priv
mysql-test/r/subselect_innodb.result:
Drop procedure p1 to cleanup
mysql-test/r/trigger-compat.result:
Drop trigger wl2818_trg1 and wl2818_trg2.
Drop table t1, t2
Drop database mysqltest_db1
And the users "mysqltest_dfn@localhost" and "mysqltest_inv@localhost"
mysql-test/r/type_bit.result:
Drop tables t1 and t2 to cleanup
mysql-test/r/variables.result:
Set GLOBAL max_join_size to 10 as it originally was in variables-master.opt
mysql-test/r/view_grant.result:
Dop user "test@localhost" to cleanup
mysql-test/t/analyze.test:
Drop table t1 to cleanup
mysql-test/t/create_select_tmp.test:
Drop table t1 to cleanup
mysql-test/t/ctype_cp932.test:
Drop table t1 to cleanup
mysql-test/t/ctype_recoding.test:
Drop table t1 to cleanup
mysql-test/t/fulltext_var.test:
Restore the original ft_boolean_syntax
mysql-test/t/grant2.test:
Drop users "mysqltest_2" and "mysqltest_A@'%'" to cleanup
mysql-test/t/innodb_cache.test:
Reset query_cache_size to original value
mysql-test/t/join_outer.test:
Drop view v1 to cleanup
mysql-test/t/ps_1general.test:
Drop table t1 to cleanup
mysql-test/t/query_cache.test:
Drop function "f1" to cleanup
mysql-test/t/read_only.test:
Reset the readonly flag
mysql-test/t/rpl000001.test:
Delete user "blafasel2" to cleanup
mysql-test/t/rpl000017.test:
Delete user "replicate" to cleanup
mysql-test/t/rpl_failed_optimize.test:
Drop table t1 to cleanup
mysql-test/t/rpl_flush_tables.test:
Droip table t3, t4 and t5 to cleanup
mysql-test/t/rpl_ignore_revoke.test:
Delet user "user_foo" to cleanup
mysql-test/t/rpl_insert_id.test:
drop table t1 to cleanup
mysql-test/t/rpl_loaddata.test:
Drop table t1 to cleanup
mysql-test/t/rpl_loaddata_rule_m.test:
Drop table t1 to cleanup
mysql-test/t/rpl_loaddata_rule_s.test:
Drop table t1 to cleanup
mysql-test/t/rpl_misc_functions.test:
Drop table t1 to cleanup
mysql-test/t/rpl_multi_update3.test:
Drop table t1 and t2 to cleanup
mysql-test/t/rpl_replicate_do.test:
Drop table t1 to cleanup
mysql-test/t/rpl_skip_error.test:
Drop table t1 to cleanup
mysql-test/t/rpl_slave_status.test:
Drop table t1 to cleanup
mysql-test/t/sp-prelocking.test:
Drop table t1, t2 t3 and t4 to cleanup
Drop view v1
mysql-test/t/sp-security.test:
Delete test users from mysql.user, mysql.db, mysql.procs_priv and mysql.tables_priv
Drop table t1 to cleanup
mysql-test/t/subselect_innodb.test:
Drop procedure p1 to cleanup
mysql-test/t/trigger-compat.test:
Drop trigger wl2818_trg1 and wl2818_trg2 to cleanup
Drop table t1, t2
Drop users
drop database mysqltest_db1
mysql-test/t/type_bit.test:
drop table t1 and t2 to cleanup
mysql-test/t/variables-master.opt:
Increase max_join_size to 100.
mysql-test/t/variables.test:
Set max_join_size to 10, which was the original value in variables-master.opt
mysql-test/t/view_grant.test:
Drop the user "test@localhost"
mysql-test/include/check-testcase.test:
New BitKeeper file ``mysql-test/include/check-testcase.test''
mysql-test/r/information_schema.result:
Remove extra spaces from result file.
mysql-test/r/mysqldump.result:
Remove extra spaces from result file.
mysql-test/r/rpl_ddl.result:
Remove extra spaces from result file.
mysql-test/r/trigger-compat.result:
Remove extra spaces from result file.
mysql-test/r/trigger-grant.result:
Remove extra spaces from result file.
mysql-test/r/trigger.result:
Remove extra spaces from result file.
sql/sql_yacc.yy:
Remove leading spaces.
checks on trigger activation)
mysql-test/r/information_schema.result:
Update result file: a new column DEFINER has been added to
INFORMATION_SCHEMA.TRIGGERS.
mysql-test/r/mysqldump.result:
Update result file: a new column DEFINER has been added to
INFORMATION_SCHEMA.TRIGGERS.
mysql-test/r/rpl_ddl.result:
Update result file: a new column DEFINER has been added to
INFORMATION_SCHEMA.TRIGGERS.
mysql-test/r/rpl_sp.result:
Update result file: a new clause DEFINER has been added to
CREATE TRIGGER statement.
mysql-test/r/rpl_trigger.result:
Results for new test cases were added.
mysql-test/r/skip_grants.result:
Error message has been changed.
mysql-test/r/trigger.result:
Added DEFINER column.
mysql-test/r/view.result:
Error messages have been changed.
mysql-test/r/view_grant.result:
Error messages have been changed.
mysql-test/t/mysqldump.test:
Drop created procedure to not affect further tests.
mysql-test/t/rpl_trigger.test:
Add tests for new column in information schema.
mysql-test/t/skip_grants.test:
Error tag has been renamed.
mysql-test/t/view.test:
Error tag has been renamed.
mysql-test/t/view_grant.test:
Error tag has been changed.
sql/item_func.cc:
Fix typo in comments.
sql/mysql_priv.h:
A try to minimize copy&paste:
- introduce operations to be used from sql_yacc.yy;
- introduce an operation to be used from trigger and
view processing code.
sql/share/errmsg.txt:
- Rename ER_NO_VIEW_USER to ER_MALFORMED_DEFINER in order to
be shared for view and trigger implementations;
- Fix a typo;
- Add a new error code for trigger warning.
sql/sp.cc:
set_info() was split into set_info() and set_definer().
sql/sp_head.cc:
set_info() was split into set_info() and set_definer().
sql/sp_head.h:
set_info() was split into set_info() and set_definer().
sql/sql_acl.cc:
Add a new check: exit from the cycle if the table is NULL.
sql/sql_lex.h:
- Rename create_view_definer to definer, since it is used for views
and triggers;
- Change st_lex_user to LEX_USER, since st_lex_user is a structure.
So, formally, it should be "struct st_lex_user", which is longer
than just LEX_USER;
- Add trigger_definition_begin.
sql/sql_parse.cc:
- Add a new check: exit from the cycle if the table is NULL;
- Implement definer-related functions.
sql/sql_show.cc:
Add DEFINER column.
sql/sql_trigger.cc:
Add DEFINER support for triggers.
sql/sql_trigger.h:
Add DEFINER support for triggers.
sql/sql_view.cc:
Rename create_view_definer to definer.
sql/sql_yacc.yy:
Add support for DEFINER-clause in CREATE TRIGGER statement.
Since CREATE TRIGGER and CREATE VIEW can be similar at the start,
yacc is unable to distinguish between them. So, had to modify both
statements in order to make it parsable by yacc.
mysql-test/r/trigger-compat.result:
Result file for triggers backward compatibility test.
mysql-test/r/trigger-grant.result:
Result file of the test for WL#2818.
mysql-test/t/trigger-compat.test:
Triggers backward compatibility test: check that the server
still can load triggers w/o definer attribute and modify
tables with such triggers (add a new trigger, etc).
mysql-test/t/trigger-grant.test:
Test for WL#2818 -- check that DEFINER support in triggers
works properly
