2006-05-22 20:46:13 +02:00
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/* Copyright (C) 2004-2006 MySQL AB
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2005-12-05 11:45:04 +01:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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2006-12-27 02:23:51 +01:00
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the Free Software Foundation; version 2 of the License.
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2005-12-05 11:45:04 +01:00
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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2006-06-08 23:07:11 +02:00
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#include "mysql_priv.h"
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#include "events.h"
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2006-06-27 08:48:50 +02:00
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#include "event_data_objects.h"
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2006-06-28 01:28:03 +02:00
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#include "event_db_repository.h"
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2006-07-05 17:12:50 +02:00
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#include "event_queue.h"
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2006-07-12 10:37:30 +02:00
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#include "event_scheduler.h"
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Patch for the following bugs:
- 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;
2007-06-28 19:34:54 +02:00
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#include "sp_head.h" // for Stored_program_creation_ctx
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2005-12-02 13:22:15 +01:00
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2007-08-15 17:08:44 +02:00
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/**
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@addtogroup Event_Scheduler
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@{
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*/
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2005-12-02 13:22:15 +01:00
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/*
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TODO list :
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2005-12-05 11:45:04 +01:00
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- CREATE EVENT should not go into binary log! Does it now? The SQL statements
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issued by the EVENT are replicated.
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2005-12-07 19:26:44 +01:00
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I have an idea how to solve the problem at failover. So the status field
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will be ENUM('DISABLED', 'ENABLED', 'SLAVESIDE_DISABLED').
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In this case when CREATE EVENT is replicated it should go into the binary
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as SLAVESIDE_DISABLED if it is ENABLED, when it's created as DISABLEd it
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should be replicated as disabled. If an event is ALTERed as DISABLED the
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query should go untouched into the binary log, when ALTERed as enable then
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it should go as SLAVESIDE_DISABLED. This is regarding the SQL interface.
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This changeset is largely a handler cleanup changeset (WL#3281), but includes fixes and cleanups that was found necessary while testing the handler changes
Changes that requires code changes in other code of other storage engines.
(Note that all changes are very straightforward and one should find all issues
by compiling a --debug build and fixing all compiler errors and all
asserts in field.cc while running the test suite),
- New optional handler function introduced: reset()
This is called after every DML statement to make it easy for a handler to
statement specific cleanups.
(The only case it's not called is if force the file to be closed)
- handler::extra(HA_EXTRA_RESET) is removed. Code that was there before
should be moved to handler::reset()
- table->read_set contains a bitmap over all columns that are needed
in the query. read_row() and similar functions only needs to read these
columns
- table->write_set contains a bitmap over all columns that will be updated
in the query. write_row() and update_row() only needs to update these
columns.
The above bitmaps should now be up to date in all context
(including ALTER TABLE, filesort()).
The handler is informed of any changes to the bitmap after
fix_fields() by calling the virtual function
handler::column_bitmaps_signal(). If the handler does caching of
these bitmaps (instead of using table->read_set, table->write_set),
it should redo the caching in this code. as the signal() may be sent
several times, it's probably best to set a variable in the signal
and redo the caching on read_row() / write_row() if the variable was
set.
- Removed the read_set and write_set bitmap objects from the handler class
- Removed all column bit handling functions from the handler class.
(Now one instead uses the normal bitmap functions in my_bitmap.c instead
of handler dedicated bitmap functions)
- field->query_id is removed. One should instead instead check
table->read_set and table->write_set if a field is used in the query.
- handler::extra(HA_EXTRA_RETRIVE_ALL_COLS) and
handler::extra(HA_EXTRA_RETRIEVE_PRIMARY_KEY) are removed. One should now
instead use table->read_set to check for which columns to retrieve.
- If a handler needs to call Field->val() or Field->store() on columns
that are not used in the query, one should install a temporary
all-columns-used map while doing so. For this, we provide the following
functions:
my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->read_set);
field->val();
dbug_tmp_restore_column_map(table->read_set, old_map);
and similar for the write map:
my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->write_set);
field->val();
dbug_tmp_restore_column_map(table->write_set, old_map);
If this is not done, you will sooner or later hit a DBUG_ASSERT
in the field store() / val() functions.
(For not DBUG binaries, the dbug_tmp_restore_column_map() and
dbug_tmp_restore_column_map() are inline dummy functions and should
be optimized away be the compiler).
- If one needs to temporary set the column map for all binaries (and not
just to avoid the DBUG_ASSERT() in the Field::store() / Field::val()
methods) one should use the functions tmp_use_all_columns() and
tmp_restore_column_map() instead of the above dbug_ variants.
- All 'status' fields in the handler base class (like records,
data_file_length etc) are now stored in a 'stats' struct. This makes
it easier to know what status variables are provided by the base
handler. This requires some trivial variable names in the extra()
function.
- New virtual function handler::records(). This is called to optimize
COUNT(*) if (handler::table_flags() & HA_HAS_RECORDS()) is true.
(stats.records is not supposed to be an exact value. It's only has to
be 'reasonable enough' for the optimizer to be able to choose a good
optimization path).
- Non virtual handler::init() function added for caching of virtual
constants from engine.
- Removed has_transactions() virtual method. Now one should instead return
HA_NO_TRANSACTIONS in table_flags() if the table handler DOES NOT support
transactions.
- The 'xxxx_create_handler()' function now has a MEM_ROOT_root argument
that is to be used with 'new handler_name()' to allocate the handler
in the right area. The xxxx_create_handler() function is also
responsible for any initialization of the object before returning.
For example, one should change:
static handler *myisam_create_handler(TABLE_SHARE *table)
{
return new ha_myisam(table);
}
->
static handler *myisam_create_handler(TABLE_SHARE *table, MEM_ROOT *mem_root)
{
return new (mem_root) ha_myisam(table);
}
- New optional virtual function: use_hidden_primary_key().
This is called in case of an update/delete when
(table_flags() and HA_PRIMARY_KEY_REQUIRED_FOR_DELETE) is defined
but we don't have a primary key. This allows the handler to take precisions
in remembering any hidden primary key to able to update/delete any
found row. The default handler marks all columns to be read.
- handler::table_flags() now returns a ulonglong (to allow for more flags).
- New/changed table_flags()
- HA_HAS_RECORDS Set if ::records() is supported
- HA_NO_TRANSACTIONS Set if engine doesn't support transactions
- HA_PRIMARY_KEY_REQUIRED_FOR_DELETE
Set if we should mark all primary key columns for
read when reading rows as part of a DELETE
statement. If there is no primary key,
all columns are marked for read.
- HA_PARTIAL_COLUMN_READ Set if engine will not read all columns in some
cases (based on table->read_set)
- HA_PRIMARY_KEY_ALLOW_RANDOM_ACCESS
Renamed to HA_PRIMARY_KEY_REQUIRED_FOR_POSITION.
- HA_DUPP_POS Renamed to HA_DUPLICATE_POS
- HA_REQUIRES_KEY_COLUMNS_FOR_DELETE
Set this if we should mark ALL key columns for
read when when reading rows as part of a DELETE
statement. In case of an update we will mark
all keys for read for which key part changed
value.
- HA_STATS_RECORDS_IS_EXACT
Set this if stats.records is exact.
(This saves us some extra records() calls
when optimizing COUNT(*))
- Removed table_flags()
- HA_NOT_EXACT_COUNT Now one should instead use HA_HAS_RECORDS if
handler::records() gives an exact count() and
HA_STATS_RECORDS_IS_EXACT if stats.records is exact.
- HA_READ_RND_SAME Removed (no one supported this one)
- Removed not needed functions ha_retrieve_all_cols() and ha_retrieve_all_pk()
- Renamed handler::dupp_pos to handler::dup_pos
- Removed not used variable handler::sortkey
Upper level handler changes:
- ha_reset() now does some overall checks and calls ::reset()
- ha_table_flags() added. This is a cached version of table_flags(). The
cache is updated on engine creation time and updated on open.
MySQL level changes (not obvious from the above):
- DBUG_ASSERT() added to check that column usage matches what is set
in the column usage bit maps. (This found a LOT of bugs in current
column marking code).
- In 5.1 before, all used columns was marked in read_set and only updated
columns was marked in write_set. Now we only mark columns for which we
need a value in read_set.
- Column bitmaps are created in open_binary_frm() and open_table_from_share().
(Before this was in table.cc)
- handler::table_flags() calls are replaced with handler::ha_table_flags()
- For calling field->val() you must have the corresponding bit set in
table->read_set. For calling field->store() you must have the
corresponding bit set in table->write_set. (There are asserts in
all store()/val() functions to catch wrong usage)
- thd->set_query_id is renamed to thd->mark_used_columns and instead
of setting this to an integer value, this has now the values:
MARK_COLUMNS_NONE, MARK_COLUMNS_READ, MARK_COLUMNS_WRITE
Changed also all variables named 'set_query_id' to mark_used_columns.
- In filesort() we now inform the handler of exactly which columns are needed
doing the sort and choosing the rows.
- The TABLE_SHARE object has a 'all_set' column bitmap one can use
when one needs a column bitmap with all columns set.
(This is used for table->use_all_columns() and other places)
- The TABLE object has 3 column bitmaps:
- def_read_set Default bitmap for columns to be read
- def_write_set Default bitmap for columns to be written
- tmp_set Can be used as a temporary bitmap when needed.
The table object has also two pointer to bitmaps read_set and write_set
that the handler should use to find out which columns are used in which way.
- count() optimization now calls handler::records() instead of using
handler->stats.records (if (table_flags() & HA_HAS_RECORDS) is true).
- Added extra argument to Item::walk() to indicate if we should also
traverse sub queries.
- Added TABLE parameter to cp_buffer_from_ref()
- Don't close tables created with CREATE ... SELECT but keep them in
the table cache. (Faster usage of newly created tables).
New interfaces:
- table->clear_column_bitmaps() to initialize the bitmaps for tables
at start of new statements.
- table->column_bitmaps_set() to set up new column bitmaps and signal
the handler about this.
- table->column_bitmaps_set_no_signal() for some few cases where we need
to setup new column bitmaps but don't signal the handler (as the handler
has already been signaled about these before). Used for the momement
only in opt_range.cc when doing ROR scans.
- table->use_all_columns() to install a bitmap where all columns are marked
as use in the read and the write set.
- table->default_column_bitmaps() to install the normal read and write
column bitmaps, but not signaling the handler about this.
This is mainly used when creating TABLE instances.
- table->mark_columns_needed_for_delete(),
table->mark_columns_needed_for_delete() and
table->mark_columns_needed_for_insert() to allow us to put additional
columns in column usage maps if handler so requires.
(The handler indicates what it neads in handler->table_flags())
- table->prepare_for_position() to allow us to tell handler that it
needs to read primary key parts to be able to store them in
future table->position() calls.
(This replaces the table->file->ha_retrieve_all_pk function)
- table->mark_auto_increment_column() to tell handler are going to update
columns part of any auto_increment key.
- table->mark_columns_used_by_index() to mark all columns that is part of
an index. It will also send extra(HA_EXTRA_KEYREAD) to handler to allow
it to quickly know that it only needs to read colums that are part
of the key. (The handler can also use the column map for detecting this,
but simpler/faster handler can just monitor the extra() call).
- table->mark_columns_used_by_index_no_reset() to in addition to other columns,
also mark all columns that is used by the given key.
- table->restore_column_maps_after_mark_index() to restore to default
column maps after a call to table->mark_columns_used_by_index().
- New item function register_field_in_read_map(), for marking used columns
in table->read_map. Used by filesort() to mark all used columns
- Maintain in TABLE->merge_keys set of all keys that are used in query.
(Simplices some optimization loops)
- Maintain Field->part_of_key_not_clustered which is like Field->part_of_key
but the field in the clustered key is not assumed to be part of all index.
(used in opt_range.cc for faster loops)
- dbug_tmp_use_all_columns(), dbug_tmp_restore_column_map()
tmp_use_all_columns() and tmp_restore_column_map() functions to temporally
mark all columns as usable. The 'dbug_' version is primarily intended
inside a handler when it wants to just call Field:store() & Field::val()
functions, but don't need the column maps set for any other usage.
(ie:: bitmap_is_set() is never called)
- We can't use compare_records() to skip updates for handlers that returns
a partial column set and the read_set doesn't cover all columns in the
write set. The reason for this is that if we have a column marked only for
write we can't in the MySQL level know if the value changed or not.
The reason this worked before was that MySQL marked all to be written
columns as also to be read. The new 'optimal' bitmaps exposed this 'hidden
bug'.
- open_table_from_share() does not anymore setup temporary MEM_ROOT
object as a thread specific variable for the handler. Instead we
send the to-be-used MEMROOT to get_new_handler().
(Simpler, faster code)
Bugs fixed:
- Column marking was not done correctly in a lot of cases.
(ALTER TABLE, when using triggers, auto_increment fields etc)
(Could potentially result in wrong values inserted in table handlers
relying on that the old column maps or field->set_query_id was correct)
Especially when it comes to triggers, there may be cases where the
old code would cause lost/wrong values for NDB and/or InnoDB tables.
- Split thd->options flag OPTION_STATUS_NO_TRANS_UPDATE to two flags:
OPTION_STATUS_NO_TRANS_UPDATE and OPTION_KEEP_LOG.
This allowed me to remove some wrong warnings about:
"Some non-transactional changed tables couldn't be rolled back"
- Fixed handling of INSERT .. SELECT and CREATE ... SELECT that wrongly reset
(thd->options & OPTION_STATUS_NO_TRANS_UPDATE) which caused us to loose
some warnings about
"Some non-transactional changed tables couldn't be rolled back")
- Fixed use of uninitialized memory in ha_ndbcluster.cc::delete_table()
which could cause delete_table to report random failures.
- Fixed core dumps for some tests when running with --debug
- Added missing FN_LIBCHAR in mysql_rm_tmp_tables()
(This has probably caused us to not properly remove temporary files after
crash)
- slow_logs was not properly initialized, which could maybe cause
extra/lost entries in slow log.
- If we get an duplicate row on insert, change column map to read and
write all columns while retrying the operation. This is required by
the definition of REPLACE and also ensures that fields that are only
part of UPDATE are properly handled. This fixed a bug in NDB and
REPLACE where REPLACE wrongly copied some column values from the replaced
row.
- For table handler that doesn't support NULL in keys, we would give an error
when creating a primary key with NULL fields, even after the fields has been
automaticly converted to NOT NULL.
- Creating a primary key on a SPATIAL key, would fail if field was not
declared as NOT NULL.
Cleanups:
- Removed not used condition argument to setup_tables
- Removed not needed item function reset_query_id_processor().
- Field->add_index is removed. Now this is instead maintained in
(field->flags & FIELD_IN_ADD_INDEX)
- Field->fieldnr is removed (use field->field_index instead)
- New argument to filesort() to indicate that it should return a set of
row pointers (not used columns). This allowed me to remove some references
to sql_command in filesort and should also enable us to return column
results in some cases where we couldn't before.
- Changed column bitmap handling in opt_range.cc to be aligned with TABLE
bitmap, which allowed me to use bitmap functions instead of looping over
all fields to create some needed bitmaps. (Faster and smaller code)
- Broke up found too long lines
- Moved some variable declaration at start of function for better code
readability.
- Removed some not used arguments from functions.
(setup_fields(), mysql_prepare_insert_check_table())
- setup_fields() now takes an enum instead of an int for marking columns
usage.
- For internal temporary tables, use handler::write_row(),
handler::delete_row() and handler::update_row() instead of
handler::ha_xxxx() for faster execution.
- Changed some constants to enum's and define's.
- Using separate column read and write sets allows for easier checking
of timestamp field was set by statement.
- Remove calls to free_io_cache() as this is now done automaticly in ha_reset()
- Don't build table->normalized_path as this is now identical to table->path
(after bar's fixes to convert filenames)
- Fixed some missed DBUG_PRINT(.."%lx") to use "0x%lx" to make it easier to
do comparision with the 'convert-dbug-for-diff' tool.
Things left to do in 5.1:
- We wrongly log failed CREATE TABLE ... SELECT in some cases when using
row based logging (as shown by testcase binlog_row_mix_innodb_myisam.result)
Mats has promised to look into this.
- Test that my fix for CREATE TABLE ... SELECT is indeed correct.
(I added several test cases for this, but in this case it's better that
someone else also tests this throughly).
Lars has promosed to do this.
2006-06-04 17:52:22 +02:00
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TT routines however modify mysql.event internally and this does not go the
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log so in this case queries has to be injected into the log...somehow... or
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2005-12-07 19:26:44 +01:00
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maybe a solution is RBR for this case, because the event may go only from
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ENABLED to DISABLED status change and this is safe for replicating. As well
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an event may be deleted which is also safe for RBR.
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2005-12-05 11:45:04 +01:00
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- Add logging to file
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2005-12-07 22:29:00 +01:00
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*/
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2005-12-05 11:45:04 +01:00
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2006-07-05 17:12:50 +02:00
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/*
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If the user (un)intentionally removes an event directly from mysql.event
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the following sequence has to be used to be able to remove the in-memory
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counterpart.
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1. CREATE EVENT the_name ON SCHEDULE EVERY 1 SECOND DISABLE DO SELECT 1;
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2. DROP EVENT the_name
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2007-03-23 16:14:03 +01:00
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2006-07-05 17:12:50 +02:00
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In other words, the first one will create a row in mysql.event . In the
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second step because there will be a line, disk based drop will pass and
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the scheduler will remove the memory counterpart. The reason is that
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in-memory queue does not check whether the event we try to drop from memory
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is disabled. Disabled events are not kept in-memory because they are not
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eligible for execution.
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*/
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2006-09-01 13:08:44 +02:00
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/*
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Keep the order of the first to as in var_typelib
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sys_var_event_scheduler::value_ptr() references this array. Keep in
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mind!
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*/
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static const char *opt_event_scheduler_state_names[]=
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{ "OFF", "ON", "0", "1", "DISABLED", NullS };
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2006-05-22 20:46:13 +02:00
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2007-04-05 13:24:34 +02:00
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const TYPELIB Events::opt_typelib=
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2006-05-22 20:46:13 +02:00
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{
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2006-09-01 13:08:44 +02:00
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array_elements(opt_event_scheduler_state_names)-1,
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"",
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opt_event_scheduler_state_names,
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NULL
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};
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/*
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The order should not be changed. We consider OFF to be equivalent of INT 0
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And ON of 1. If OFF & ON are interchanged the logic in
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sys_var_event_scheduler::update() will be broken!
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*/
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static const char *var_event_scheduler_state_names[]= { "OFF", "ON", NullS };
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2007-04-05 13:24:34 +02:00
|
|
|
const TYPELIB Events::var_typelib=
|
2006-09-01 13:08:44 +02:00
|
|
|
{
|
|
|
|
|
array_elements(var_event_scheduler_state_names)-1,
|
2006-05-22 20:46:13 +02:00
|
|
|
"",
|
2006-09-01 13:08:44 +02:00
|
|
|
var_event_scheduler_state_names,
|
2006-05-22 20:46:13 +02:00
|
|
|
NULL
|
|
|
|
|
};
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
Event_queue *Events::event_queue;
|
|
|
|
|
Event_scheduler *Events::scheduler;
|
|
|
|
|
Event_db_repository *Events::db_repository;
|
|
|
|
|
enum Events::enum_opt_event_scheduler
|
|
|
|
|
Events::opt_event_scheduler= Events::EVENTS_OFF;
|
|
|
|
|
pthread_mutex_t Events::LOCK_event_metadata;
|
|
|
|
|
bool Events::check_system_tables_error= FALSE;
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2006-02-14 16:20:48 +01:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
Compares 2 LEX strings regarding case.
|
2006-02-28 14:43:49 +01:00
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
SYNOPSIS
|
2006-06-08 23:07:11 +02:00
|
|
|
sortcmp_lex_string()
|
2006-07-11 18:28:15 +02:00
|
|
|
s First LEX_STRING
|
|
|
|
|
t Second LEX_STRING
|
|
|
|
|
cs Charset
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
RETURN VALUE
|
2006-07-11 18:28:15 +02:00
|
|
|
-1 s < t
|
|
|
|
|
0 s == t
|
|
|
|
|
1 s > t
|
2006-02-14 16:20:48 +01:00
|
|
|
*/
|
2006-01-30 13:15:23 +01:00
|
|
|
|
2005-12-08 20:37:54 +01:00
|
|
|
int sortcmp_lex_string(LEX_STRING s, LEX_STRING t, CHARSET_INFO *cs)
|
|
|
|
|
{
|
2006-06-19 11:45:34 +02:00
|
|
|
return cs->coll->strnncollsp(cs, (uchar *) s.str,s.length,
|
|
|
|
|
(uchar *) t.str,t.length, 0);
|
2005-12-08 20:37:54 +01:00
|
|
|
}
|
|
|
|
|
|
2006-07-11 18:28:15 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
@brief Initialize the start up option of the Events scheduler.
|
2006-06-28 14:22:14 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
Do not initialize the scheduler subsystem yet - the initialization
|
|
|
|
|
is split into steps as it has to fit into the common MySQL
|
|
|
|
|
initialization framework.
|
|
|
|
|
No locking as this is called only at start up.
|
2006-06-28 14:22:14 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@param[in,out] argument The value of the argument. If this value
|
|
|
|
|
is found in the typelib, the argument is
|
|
|
|
|
updated.
|
|
|
|
|
|
|
|
|
|
@retval TRUE unknown option value
|
|
|
|
|
@retval FALSE success
|
2006-06-28 14:22:14 +02:00
|
|
|
*/
|
2005-12-08 20:37:54 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
bool
|
|
|
|
|
Events::set_opt_event_scheduler(char *argument)
|
2006-06-28 01:28:03 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
if (argument == NULL)
|
2007-10-22 21:16:43 +02:00
|
|
|
opt_event_scheduler= Events::EVENTS_ON;
|
2007-04-05 13:24:34 +02:00
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
int type;
|
|
|
|
|
/*
|
|
|
|
|
type= 1 2 3 4 5
|
|
|
|
|
(OFF | ON) - (0 | 1) (DISABLE )
|
|
|
|
|
*/
|
|
|
|
|
const static enum enum_opt_event_scheduler type2state[]=
|
|
|
|
|
{ EVENTS_OFF, EVENTS_ON, EVENTS_OFF, EVENTS_ON, EVENTS_DISABLED };
|
|
|
|
|
|
|
|
|
|
type= find_type(argument, &opt_typelib, 1);
|
|
|
|
|
|
|
|
|
|
DBUG_ASSERT(type >= 0 && type <= 5); /* guaranteed by find_type */
|
|
|
|
|
|
|
|
|
|
if (type == 0)
|
|
|
|
|
{
|
|
|
|
|
fprintf(stderr, "Unknown option to event-scheduler: %s\n", argument);
|
|
|
|
|
return TRUE;
|
|
|
|
|
}
|
|
|
|
|
opt_event_scheduler= type2state[type-1];
|
|
|
|
|
}
|
|
|
|
|
return FALSE;
|
2006-06-28 01:28:03 +02:00
|
|
|
}
|
|
|
|
|
|
2005-12-08 20:37:54 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Return a string representation of the current scheduler mode.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
const char *
|
|
|
|
|
Events::get_opt_event_scheduler_str()
|
|
|
|
|
{
|
|
|
|
|
const char *str;
|
|
|
|
|
|
|
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
|
|
|
|
str= opt_typelib.type_names[(int) opt_event_scheduler];
|
|
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
|
|
|
|
|
|
|
|
|
return str;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Push an error into the error stack if the system tables are
|
|
|
|
|
not up to date.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
bool Events::check_if_system_tables_error()
|
|
|
|
|
{
|
|
|
|
|
DBUG_ENTER("Events::check_if_system_tables_error");
|
|
|
|
|
|
|
|
|
|
if (check_system_tables_error)
|
|
|
|
|
{
|
|
|
|
|
my_error(ER_EVENTS_DB_ERROR, MYF(0));
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
DBUG_RETURN(FALSE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
2006-02-14 16:20:48 +01:00
|
|
|
Reconstructs interval expression from interval type and expression
|
|
|
|
|
value that is in form of a value of the smalles entity:
|
|
|
|
|
For
|
|
|
|
|
YEAR_MONTH - expression is in months
|
|
|
|
|
DAY_MINUTE - expression is in minutes
|
2006-02-28 14:43:49 +01:00
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
SYNOPSIS
|
|
|
|
|
Events::reconstruct_interval_expression()
|
2006-07-11 18:28:15 +02:00
|
|
|
buf Preallocated String buffer to add the value to
|
|
|
|
|
interval The interval type (for instance YEAR_MONTH)
|
|
|
|
|
expression The value in the lowest entity
|
2006-02-28 14:43:49 +01:00
|
|
|
|
2006-06-28 14:22:14 +02:00
|
|
|
RETURN VALUE
|
2006-07-11 18:28:15 +02:00
|
|
|
0 OK
|
|
|
|
|
1 Error
|
2006-02-14 16:20:48 +01:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
int
|
2006-06-28 01:28:03 +02:00
|
|
|
Events::reconstruct_interval_expression(String *buf, interval_type interval,
|
|
|
|
|
longlong expression)
|
2006-02-14 16:20:48 +01:00
|
|
|
{
|
|
|
|
|
ulonglong expr= expression;
|
|
|
|
|
char tmp_buff[128], *end;
|
|
|
|
|
bool close_quote= TRUE;
|
|
|
|
|
int multipl= 0;
|
|
|
|
|
char separator=':';
|
|
|
|
|
|
|
|
|
|
switch (interval) {
|
|
|
|
|
case INTERVAL_YEAR_MONTH:
|
|
|
|
|
multipl= 12;
|
|
|
|
|
separator= '-';
|
|
|
|
|
goto common_1_lev_code;
|
|
|
|
|
case INTERVAL_DAY_HOUR:
|
|
|
|
|
multipl= 24;
|
|
|
|
|
separator= ' ';
|
|
|
|
|
goto common_1_lev_code;
|
|
|
|
|
case INTERVAL_HOUR_MINUTE:
|
|
|
|
|
case INTERVAL_MINUTE_SECOND:
|
2006-02-28 14:43:49 +01:00
|
|
|
multipl= 60;
|
2006-02-14 16:20:48 +01:00
|
|
|
common_1_lev_code:
|
|
|
|
|
buf->append('\'');
|
|
|
|
|
end= longlong10_to_str(expression/multipl, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));
|
|
|
|
|
expr= expr - (expr/multipl)*multipl;
|
|
|
|
|
break;
|
|
|
|
|
case INTERVAL_DAY_MINUTE:
|
|
|
|
|
{
|
2006-02-28 20:32:37 +01:00
|
|
|
ulonglong tmp_expr= expr;
|
2006-02-14 16:20:48 +01:00
|
|
|
|
|
|
|
|
tmp_expr/=(24*60);
|
|
|
|
|
buf->append('\'');
|
|
|
|
|
end= longlong10_to_str(tmp_expr, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// days
|
|
|
|
|
buf->append(' ');
|
|
|
|
|
|
|
|
|
|
tmp_expr= expr - tmp_expr*(24*60);//minutes left
|
|
|
|
|
end= longlong10_to_str(tmp_expr/60, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// hours
|
|
|
|
|
|
|
|
|
|
expr= tmp_expr - (tmp_expr/60)*60;
|
|
|
|
|
/* the code after the switch will finish */
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case INTERVAL_HOUR_SECOND:
|
|
|
|
|
{
|
2006-02-28 20:32:37 +01:00
|
|
|
ulonglong tmp_expr= expr;
|
2006-02-14 16:20:48 +01:00
|
|
|
|
|
|
|
|
buf->append('\'');
|
|
|
|
|
end= longlong10_to_str(tmp_expr/3600, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// hours
|
|
|
|
|
buf->append(':');
|
|
|
|
|
|
|
|
|
|
tmp_expr= tmp_expr - (tmp_expr/3600)*3600;
|
|
|
|
|
end= longlong10_to_str(tmp_expr/60, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// minutes
|
|
|
|
|
|
|
|
|
|
expr= tmp_expr - (tmp_expr/60)*60;
|
|
|
|
|
/* the code after the switch will finish */
|
|
|
|
|
}
|
2006-06-29 00:42:25 +02:00
|
|
|
break;
|
2006-02-14 16:20:48 +01:00
|
|
|
case INTERVAL_DAY_SECOND:
|
|
|
|
|
{
|
2006-02-28 20:32:37 +01:00
|
|
|
ulonglong tmp_expr= expr;
|
2006-02-14 16:20:48 +01:00
|
|
|
|
|
|
|
|
tmp_expr/=(24*3600);
|
|
|
|
|
buf->append('\'');
|
|
|
|
|
end= longlong10_to_str(tmp_expr, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// days
|
|
|
|
|
buf->append(' ');
|
|
|
|
|
|
|
|
|
|
tmp_expr= expr - tmp_expr*(24*3600);//seconds left
|
|
|
|
|
end= longlong10_to_str(tmp_expr/3600, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// hours
|
|
|
|
|
buf->append(':');
|
|
|
|
|
|
|
|
|
|
tmp_expr= tmp_expr - (tmp_expr/3600)*3600;
|
|
|
|
|
end= longlong10_to_str(tmp_expr/60, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));// minutes
|
|
|
|
|
|
|
|
|
|
expr= tmp_expr - (tmp_expr/60)*60;
|
|
|
|
|
/* the code after the switch will finish */
|
|
|
|
|
}
|
2006-08-17 14:22:59 +02:00
|
|
|
break;
|
2006-02-14 16:20:48 +01:00
|
|
|
case INTERVAL_DAY_MICROSECOND:
|
|
|
|
|
case INTERVAL_HOUR_MICROSECOND:
|
|
|
|
|
case INTERVAL_MINUTE_MICROSECOND:
|
|
|
|
|
case INTERVAL_SECOND_MICROSECOND:
|
2006-02-20 16:06:05 +01:00
|
|
|
case INTERVAL_MICROSECOND:
|
2006-02-14 20:10:51 +01:00
|
|
|
my_error(ER_NOT_SUPPORTED_YET, MYF(0), "MICROSECOND");
|
2006-02-14 16:20:48 +01:00
|
|
|
return 1;
|
|
|
|
|
break;
|
|
|
|
|
case INTERVAL_QUARTER:
|
|
|
|
|
expr/= 3;
|
|
|
|
|
close_quote= FALSE;
|
|
|
|
|
break;
|
|
|
|
|
case INTERVAL_WEEK:
|
|
|
|
|
expr/= 7;
|
|
|
|
|
default:
|
|
|
|
|
close_quote= FALSE;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (close_quote)
|
|
|
|
|
buf->append(separator);
|
|
|
|
|
end= longlong10_to_str(expr, tmp_buff, 10);
|
|
|
|
|
buf->append(tmp_buff, (uint) (end- tmp_buff));
|
|
|
|
|
if (close_quote)
|
|
|
|
|
buf->append('\'');
|
2006-02-16 13:11:16 +01:00
|
|
|
|
2006-02-14 16:20:48 +01:00
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2009-08-29 10:52:22 +02:00
|
|
|
/**
|
|
|
|
|
Create a new query string for removing executable comments
|
|
|
|
|
for avoiding leak and keeping consistency of the execution
|
|
|
|
|
on master and slave.
|
|
|
|
|
|
|
|
|
|
@param[in] thd Thread handler
|
|
|
|
|
@param[in] buf Query string
|
|
|
|
|
|
|
|
|
|
@return
|
|
|
|
|
0 ok
|
|
|
|
|
1 error
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
create_query_string(THD *thd, String *buf)
|
|
|
|
|
{
|
|
|
|
|
/* Append the "CREATE" part of the query */
|
|
|
|
|
if (buf->append(STRING_WITH_LEN("CREATE ")))
|
|
|
|
|
return 1;
|
|
|
|
|
/* Append definer */
|
|
|
|
|
append_definer(thd, buf, &(thd->lex->definer->user), &(thd->lex->definer->host));
|
|
|
|
|
/* Append the left part of thd->query after "DEFINER" part */
|
|
|
|
|
if (buf->append(thd->lex->stmt_definition_begin))
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Create a new event.
|
|
|
|
|
|
|
|
|
|
@param[in,out] thd THD
|
|
|
|
|
@param[in] parse_data Event's data from parsing stage
|
|
|
|
|
@param[in] if_not_exists Whether IF NOT EXISTS was
|
|
|
|
|
specified
|
|
|
|
|
In case there is an event with the same name (db) and
|
|
|
|
|
IF NOT EXISTS is specified, an warning is put into the stack.
|
|
|
|
|
@sa Events::drop_event for the notes about locking, pre-locking
|
|
|
|
|
and Events DDL.
|
|
|
|
|
|
|
|
|
|
@retval FALSE OK
|
|
|
|
|
@retval TRUE Error (reported)
|
2006-08-17 14:22:59 +02:00
|
|
|
*/
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
bool
|
|
|
|
|
Events::create_event(THD *thd, Event_parse_data *parse_data,
|
|
|
|
|
bool if_not_exists)
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
int ret;
|
|
|
|
|
DBUG_ENTER("Events::create_event");
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
Let's commit the transaction first - MySQL manual specifies
|
|
|
|
|
that a DDL issues an implicit commit, and it doesn't say "successful
|
|
|
|
|
DDL", so that an implicit commit is a property of any successfully
|
|
|
|
|
parsed DDL statement.
|
|
|
|
|
*/
|
|
|
|
|
if (end_active_trans(thd))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (check_if_system_tables_error())
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2005-12-02 13:22:15 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
Perform semantic checks outside of Event_db_repository:
|
|
|
|
|
once CREATE EVENT is supported in prepared statements, the
|
|
|
|
|
checks will be moved to PREPARE phase.
|
|
|
|
|
*/
|
|
|
|
|
if (parse_data->check_parse_data(thd))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2005-12-02 13:22:15 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/* At create, one of them must be set */
|
|
|
|
|
DBUG_ASSERT(parse_data->expression || parse_data->execute_at);
|
2005-12-02 13:22:15 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (check_access(thd, EVENT_ACL, parse_data->dbname.str, 0, 0, 0,
|
|
|
|
|
is_schema_db(parse_data->dbname.str)))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2005-12-02 13:22:15 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (check_db_dir_existence(parse_data->dbname.str))
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2007-04-05 23:53:15 +02:00
|
|
|
my_error(ER_BAD_DB_ERROR, MYF(0), parse_data->dbname.str);
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (parse_data->do_not_create)
|
|
|
|
|
DBUG_RETURN(FALSE);
|
2007-03-16 14:56:57 +01:00
|
|
|
/*
|
|
|
|
|
Turn off row binlogging of this statement and use statement-based
|
|
|
|
|
so that all supporting tables are updated for CREATE EVENT command.
|
|
|
|
|
*/
|
|
|
|
|
if (thd->current_stmt_binlog_row_based)
|
|
|
|
|
thd->clear_current_stmt_binlog_row_based();
|
|
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
2007-03-16 14:56:57 +01:00
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
/* On error conditions my_error() is called so no need to handle here */
|
2007-04-05 13:24:34 +02:00
|
|
|
if (!(ret= db_repository->create_event(thd, parse_data, if_not_exists)))
|
2005-12-02 13:22:15 +01:00
|
|
|
{
|
2007-01-29 18:46:29 +01:00
|
|
|
Event_queue_element *new_element;
|
2009-04-09 08:22:06 +02:00
|
|
|
bool dropped= 0;
|
2007-01-29 18:46:29 +01:00
|
|
|
|
|
|
|
|
if (!(new_element= new Event_queue_element()))
|
|
|
|
|
ret= TRUE; // OOM
|
|
|
|
|
else if ((ret= db_repository->load_named_event(thd, parse_data->dbname,
|
|
|
|
|
parse_data->name,
|
|
|
|
|
new_element)))
|
2006-07-10 13:44:43 +02:00
|
|
|
{
|
2009-04-09 08:22:06 +02:00
|
|
|
if (!db_repository->drop_event(thd, parse_data->dbname, parse_data->name,
|
|
|
|
|
TRUE))
|
|
|
|
|
dropped= 1;
|
2007-01-29 18:46:29 +01:00
|
|
|
delete new_element;
|
2006-07-10 13:44:43 +02:00
|
|
|
}
|
2007-04-05 13:49:46 +02:00
|
|
|
else
|
2007-03-16 14:56:57 +01:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
/* TODO: do not ignore the out parameter and a possible OOM error! */
|
|
|
|
|
bool created;
|
2007-04-05 13:49:46 +02:00
|
|
|
if (event_queue)
|
|
|
|
|
event_queue->create_event(thd, new_element, &created);
|
2009-04-09 08:22:06 +02:00
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
binlog the create event unless it's been successfully dropped
|
|
|
|
|
*/
|
|
|
|
|
if (!dropped)
|
|
|
|
|
{
|
2007-04-05 13:49:46 +02:00
|
|
|
/* Binlog the create event. */
|
2009-10-16 12:29:42 +02:00
|
|
|
DBUG_ASSERT(thd->query() && thd->query_length());
|
2009-08-29 10:52:22 +02:00
|
|
|
String log_query;
|
|
|
|
|
if (create_query_string(thd, &log_query))
|
|
|
|
|
{
|
|
|
|
|
sql_print_error("Event Error: An error occurred while creating query string, "
|
|
|
|
|
"before writing it into binary log.");
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
}
|
|
|
|
|
/* If the definer is not set or set to CURRENT_USER, the value of CURRENT_USER
|
|
|
|
|
will be written into the binary log as the definer for the SQL thread. */
|
|
|
|
|
write_bin_log(thd, TRUE, log_query.c_ptr(), log_query.length());
|
2007-03-16 14:56:57 +01:00
|
|
|
}
|
2005-12-02 13:22:15 +01:00
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
2005-12-06 16:15:29 +01:00
|
|
|
|
2005-12-02 13:22:15 +01:00
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Alter an event.
|
|
|
|
|
|
|
|
|
|
@param[in,out] thd THD
|
|
|
|
|
@param[in] parse_data Event's data from parsing stage
|
|
|
|
|
@param[in] new_dbname A new schema name for the event. Set in the case of
|
|
|
|
|
ALTER EVENT RENAME, otherwise is NULL.
|
|
|
|
|
@param[in] new_name A new name for the event. Set in the case of
|
|
|
|
|
ALTER EVENT RENAME
|
|
|
|
|
|
|
|
|
|
Parameter 'et' contains data about dbname and event name.
|
|
|
|
|
Parameter 'new_name' is the new name of the event, if not null
|
|
|
|
|
this means that RENAME TO was specified in the query
|
|
|
|
|
@sa Events::drop_event for the locking notes.
|
|
|
|
|
|
|
|
|
|
@retval FALSE OK
|
|
|
|
|
@retval TRUE error (reported)
|
2005-12-02 13:22:15 +01:00
|
|
|
*/
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
bool
|
2007-04-05 13:24:34 +02:00
|
|
|
Events::update_event(THD *thd, Event_parse_data *parse_data,
|
|
|
|
|
LEX_STRING *new_dbname, LEX_STRING *new_name)
|
2005-12-02 13:22:15 +01:00
|
|
|
{
|
2006-02-28 20:32:37 +01:00
|
|
|
int ret;
|
2007-01-29 18:46:29 +01:00
|
|
|
Event_queue_element *new_element;
|
2007-04-05 13:24:34 +02:00
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
DBUG_ENTER("Events::update_event");
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
For consistency, implicit COMMIT should be the first thing in the
|
|
|
|
|
execution chain.
|
|
|
|
|
*/
|
|
|
|
|
if (end_active_trans(thd))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
if (check_if_system_tables_error())
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
if (parse_data->check_parse_data(thd) || parse_data->do_not_create)
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
if (check_access(thd, EVENT_ACL, parse_data->dbname.str, 0, 0, 0,
|
|
|
|
|
is_schema_db(parse_data->dbname.str)))
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
if (new_dbname) /* It's a rename */
|
|
|
|
|
{
|
|
|
|
|
/* Check that the new and the old names differ. */
|
|
|
|
|
if ( !sortcmp_lex_string(parse_data->dbname, *new_dbname,
|
|
|
|
|
system_charset_info) &&
|
|
|
|
|
!sortcmp_lex_string(parse_data->name, *new_name,
|
|
|
|
|
system_charset_info))
|
|
|
|
|
{
|
|
|
|
|
my_error(ER_EVENT_SAME_NAME, MYF(0), parse_data->name.str);
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
And the user has sufficient privileges to use the target database.
|
|
|
|
|
Do it before checking whether the database exists: we don't want
|
|
|
|
|
to tell the user that a database doesn't exist if they can not
|
|
|
|
|
access it.
|
|
|
|
|
*/
|
|
|
|
|
if (check_access(thd, EVENT_ACL, new_dbname->str, 0, 0, 0,
|
|
|
|
|
is_schema_db(new_dbname->str)))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
/* Check that the target database exists */
|
|
|
|
|
if (check_db_dir_existence(new_dbname->str))
|
|
|
|
|
{
|
2007-04-05 23:53:15 +02:00
|
|
|
my_error(ER_BAD_DB_ERROR, MYF(0), new_dbname->str);
|
2007-04-05 13:24:34 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
}
|
2006-08-17 14:22:59 +02:00
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
|
2007-03-16 14:56:57 +01:00
|
|
|
/*
|
|
|
|
|
Turn off row binlogging of this statement and use statement-based
|
|
|
|
|
so that all supporting tables are updated for UPDATE EVENT command.
|
|
|
|
|
*/
|
|
|
|
|
if (thd->current_stmt_binlog_row_based)
|
|
|
|
|
thd->clear_current_stmt_binlog_row_based();
|
|
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
2007-03-16 14:56:57 +01:00
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
/* On error conditions my_error() is called so no need to handle here */
|
2007-04-05 13:24:34 +02:00
|
|
|
if (!(ret= db_repository->update_event(thd, parse_data,
|
|
|
|
|
new_dbname, new_name)))
|
2005-12-08 15:34:11 +01:00
|
|
|
{
|
2007-01-29 18:46:29 +01:00
|
|
|
LEX_STRING dbname= new_dbname ? *new_dbname : parse_data->dbname;
|
|
|
|
|
LEX_STRING name= new_name ? *new_name : parse_data->name;
|
|
|
|
|
|
|
|
|
|
if (!(new_element= new Event_queue_element()))
|
|
|
|
|
ret= TRUE; // OOM
|
|
|
|
|
else if ((ret= db_repository->load_named_event(thd, dbname, name,
|
|
|
|
|
new_element)))
|
2006-07-10 13:44:43 +02:00
|
|
|
{
|
|
|
|
|
DBUG_ASSERT(ret == OP_LOAD_ERROR);
|
2007-03-23 16:14:03 +01:00
|
|
|
delete new_element;
|
2006-07-10 13:44:43 +02:00
|
|
|
}
|
2007-04-05 13:49:46 +02:00
|
|
|
else
|
2007-03-16 14:56:57 +01:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
TODO: check if an update actually has inserted an entry
|
|
|
|
|
into the queue.
|
|
|
|
|
If not, and the element is ON COMPLETION NOT PRESERVE, delete
|
|
|
|
|
it right away.
|
|
|
|
|
*/
|
2007-04-05 13:49:46 +02:00
|
|
|
if (event_queue)
|
|
|
|
|
event_queue->update_event(thd, parse_data->dbname, parse_data->name,
|
|
|
|
|
new_element);
|
|
|
|
|
/* Binlog the alter event. */
|
2009-10-16 12:29:42 +02:00
|
|
|
DBUG_ASSERT(thd->query() && thd->query_length());
|
|
|
|
|
write_bin_log(thd, TRUE, thd->query(), thd->query_length());
|
2007-03-16 14:56:57 +01:00
|
|
|
}
|
2005-12-08 15:34:11 +01:00
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
|
|
|
|
|
2005-12-02 13:22:15 +01:00
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
2006-05-22 20:46:13 +02:00
|
|
|
Drops an event
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@param[in,out] thd THD
|
|
|
|
|
@param[in] dbname Event's schema
|
|
|
|
|
@param[in] name Event's name
|
|
|
|
|
@param[in] if_exists When this is set and the event does not exist
|
|
|
|
|
a warning is pushed into the warning stack.
|
|
|
|
|
Otherwise the operation produces an error.
|
|
|
|
|
|
|
|
|
|
@note Similarly to DROP PROCEDURE, we do not allow DROP EVENT
|
|
|
|
|
under LOCK TABLES mode, unless table mysql.event is locked. To
|
|
|
|
|
ensure that, we do not reset & backup the open tables state in
|
|
|
|
|
this function - if in LOCK TABLES or pre-locking mode, this will
|
|
|
|
|
lead to an error 'Table mysql.event is not locked with LOCK
|
|
|
|
|
TABLES' unless it _is_ locked. In pre-locked mode there is
|
|
|
|
|
another barrier - DROP EVENT commits the current transaction,
|
|
|
|
|
and COMMIT/ROLLBACK is not allowed in stored functions and
|
|
|
|
|
triggers.
|
|
|
|
|
|
|
|
|
|
@retval FALSE OK
|
|
|
|
|
@retval TRUE Error (reported)
|
2006-02-07 19:28:33 +01:00
|
|
|
*/
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
bool
|
2007-01-29 18:46:29 +01:00
|
|
|
Events::drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name, bool if_exists)
|
2006-02-07 19:28:33 +01:00
|
|
|
{
|
2006-05-22 20:46:13 +02:00
|
|
|
int ret;
|
|
|
|
|
DBUG_ENTER("Events::drop_event");
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
In MySQL, DDL must always commit: since mysql.* tables are
|
|
|
|
|
non-transactional, we must modify them outside a transaction
|
|
|
|
|
to not break atomicity.
|
|
|
|
|
But the second and more important reason to commit here
|
|
|
|
|
regardless whether we're actually changing mysql.event table
|
|
|
|
|
or not is replication: end_active_trans syncs the binary log,
|
|
|
|
|
and unless we run DDL in it's own transaction it may simply
|
|
|
|
|
never appear on the slave in case the outside transaction
|
|
|
|
|
rolls back.
|
|
|
|
|
*/
|
|
|
|
|
if (end_active_trans(thd))
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
2006-06-28 01:28:03 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (check_if_system_tables_error())
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
if (check_access(thd, EVENT_ACL, dbname.str, 0, 0, 0,
|
|
|
|
|
is_schema_db(dbname.str)))
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
2006-06-28 01:28:03 +02:00
|
|
|
|
2007-04-05 13:49:46 +02:00
|
|
|
/*
|
|
|
|
|
Turn off row binlogging of this statement and use statement-based so
|
2007-03-16 14:56:57 +01:00
|
|
|
that all supporting tables are updated for DROP EVENT command.
|
|
|
|
|
*/
|
|
|
|
|
if (thd->current_stmt_binlog_row_based)
|
|
|
|
|
thd->clear_current_stmt_binlog_row_based();
|
|
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
|
|
|
|
/* On error conditions my_error() is called so no need to handle here */
|
2006-08-28 10:27:42 +02:00
|
|
|
if (!(ret= db_repository->drop_event(thd, dbname, name, if_exists)))
|
2006-05-22 20:46:13 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
if (event_queue)
|
|
|
|
|
event_queue->drop_event(thd, dbname, name);
|
2007-03-16 14:56:57 +01:00
|
|
|
/* Binlog the drop event. */
|
2009-10-16 12:29:42 +02:00
|
|
|
DBUG_ASSERT(thd->query() && thd->query_length());
|
|
|
|
|
write_bin_log(thd, TRUE, thd->query(), thd->query_length());
|
2006-05-22 20:46:13 +02:00
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
|
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-03-23 16:14:03 +01:00
|
|
|
/**
|
2006-07-10 13:44:43 +02:00
|
|
|
Drops all events from a schema
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@note We allow to drop all events in a schema even if the
|
|
|
|
|
scheduler is disabled. This is to not produce any warnings
|
|
|
|
|
in case of DROP DATABASE and a disabled scheduler.
|
|
|
|
|
|
|
|
|
|
@param[in,out] thd Thread
|
|
|
|
|
@param[in] db ASCIIZ schema name
|
2006-07-10 13:44:43 +02:00
|
|
|
*/
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
void
|
2006-07-10 13:44:43 +02:00
|
|
|
Events::drop_schema_events(THD *thd, char *db)
|
|
|
|
|
{
|
2006-08-17 14:22:59 +02:00
|
|
|
LEX_STRING const db_lex= { db, strlen(db) };
|
2007-03-23 16:14:03 +01:00
|
|
|
|
|
|
|
|
DBUG_ENTER("Events::drop_schema_events");
|
2006-07-10 13:44:43 +02:00
|
|
|
DBUG_PRINT("enter", ("dropping events from %s", db));
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
sic: no check if the scheduler is disabled or system tables
|
|
|
|
|
are damaged, as intended.
|
|
|
|
|
*/
|
2006-07-10 13:44:43 +02:00
|
|
|
|
|
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
2007-04-05 13:24:34 +02:00
|
|
|
if (event_queue)
|
|
|
|
|
event_queue->drop_schema_events(thd, db_lex);
|
2006-08-17 14:22:59 +02:00
|
|
|
db_repository->drop_schema_events(thd, db_lex);
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_VOID_RETURN;
|
2005-12-02 13:22:15 +01:00
|
|
|
}
|
|
|
|
|
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
A helper function to generate SHOW CREATE EVENT output from
|
|
|
|
|
a named event
|
2006-02-14 16:20:48 +01:00
|
|
|
*/
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
static bool
|
|
|
|
|
send_show_create_event(THD *thd, Event_timed *et, Protocol *protocol)
|
2006-02-14 16:20:48 +01:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
char show_str_buf[10 * STRING_BUFFER_USUAL_SIZE];
|
|
|
|
|
String show_str(show_str_buf, sizeof(show_str_buf), system_charset_info);
|
|
|
|
|
List<Item> field_list;
|
|
|
|
|
LEX_STRING sql_mode;
|
|
|
|
|
const String *tz_name;
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
DBUG_ENTER("send_show_create_event");
|
|
|
|
|
|
|
|
|
|
show_str.length(0);
|
|
|
|
|
if (et->get_create_event(thd, &show_str))
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-07 11:59:53 +02:00
|
|
|
field_list.push_back(new Item_empty_string("Event", NAME_CHAR_LEN));
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (sys_var_thd_sql_mode::symbolic_mode_representation(thd, et->sql_mode,
|
|
|
|
|
&sql_mode))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2006-02-28 14:43:49 +01:00
|
|
|
|
2009-02-13 17:41:47 +01:00
|
|
|
field_list.push_back(new Item_empty_string("sql_mode", (uint) sql_mode.length));
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
tz_name= et->time_zone->get_name();
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
field_list.push_back(new Item_empty_string("time_zone",
|
|
|
|
|
tz_name->length()));
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
field_list.push_back(new Item_empty_string("Create Event",
|
|
|
|
|
show_str.length()));
|
2006-02-14 16:20:48 +01:00
|
|
|
|
Patch for the following bugs:
- 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;
2007-06-28 19:34:54 +02:00
|
|
|
field_list.push_back(
|
|
|
|
|
new Item_empty_string("character_set_client", MY_CS_NAME_SIZE));
|
|
|
|
|
|
|
|
|
|
field_list.push_back(
|
|
|
|
|
new Item_empty_string("collation_connection", MY_CS_NAME_SIZE));
|
|
|
|
|
|
|
|
|
|
field_list.push_back(
|
|
|
|
|
new Item_empty_string("Database Collation", MY_CS_NAME_SIZE));
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (protocol->send_fields(&field_list,
|
|
|
|
|
Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
protocol->prepare_for_resend();
|
2007-03-16 15:31:07 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
protocol->store(et->name.str, et->name.length, system_charset_info);
|
|
|
|
|
protocol->store(sql_mode.str, sql_mode.length, system_charset_info);
|
|
|
|
|
protocol->store(tz_name->ptr(), tz_name->length(), system_charset_info);
|
2007-07-12 10:49:39 +02:00
|
|
|
protocol->store(show_str.c_ptr(), show_str.length(),
|
|
|
|
|
et->creation_ctx->get_client_cs());
|
Patch for the following bugs:
- 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;
2007-06-28 19:34:54 +02:00
|
|
|
protocol->store(et->creation_ctx->get_client_cs()->csname,
|
|
|
|
|
strlen(et->creation_ctx->get_client_cs()->csname),
|
|
|
|
|
system_charset_info);
|
|
|
|
|
protocol->store(et->creation_ctx->get_connection_cl()->name,
|
|
|
|
|
strlen(et->creation_ctx->get_connection_cl()->name),
|
|
|
|
|
system_charset_info);
|
|
|
|
|
protocol->store(et->creation_ctx->get_db_cl()->name,
|
|
|
|
|
strlen(et->creation_ctx->get_db_cl()->name),
|
|
|
|
|
system_charset_info);
|
2006-07-11 18:28:15 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (protocol->write())
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2008-02-19 13:58:08 +01:00
|
|
|
my_eof(thd);
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
DBUG_RETURN(FALSE);
|
|
|
|
|
}
|
2006-02-14 16:20:48 +01:00
|
|
|
|
2007-03-16 15:31:07 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Implement SHOW CREATE EVENT statement
|
|
|
|
|
|
|
|
|
|
thd Thread context
|
|
|
|
|
spn The name of the event (db, name)
|
|
|
|
|
|
|
|
|
|
@retval FALSE OK
|
|
|
|
|
@retval TRUE error (reported)
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
bool
|
|
|
|
|
Events::show_create_event(THD *thd, LEX_STRING dbname, LEX_STRING name)
|
|
|
|
|
{
|
|
|
|
|
Open_tables_state open_tables_backup;
|
|
|
|
|
Event_timed et;
|
|
|
|
|
bool ret;
|
|
|
|
|
|
|
|
|
|
DBUG_ENTER("Events::show_create_event");
|
|
|
|
|
DBUG_PRINT("enter", ("name: %s@%s", dbname.str, name.str));
|
|
|
|
|
|
|
|
|
|
if (check_if_system_tables_error())
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
if (check_access(thd, EVENT_ACL, dbname.str, 0, 0, 0,
|
|
|
|
|
is_schema_db(dbname.str)))
|
|
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
We would like to allow SHOW CREATE EVENT under LOCK TABLES and
|
|
|
|
|
in pre-locked mode. mysql.event table is marked as a system table.
|
|
|
|
|
This flag reduces the set of its participation scenarios in LOCK TABLES
|
|
|
|
|
operation, and therefore an out-of-bound open of this table
|
|
|
|
|
for reading like the one below (sic, only for reading) is
|
|
|
|
|
more or less deadlock-free. For additional information about when a
|
|
|
|
|
deadlock can occur please refer to the description of 'system table'
|
|
|
|
|
flag.
|
|
|
|
|
*/
|
|
|
|
|
thd->reset_n_backup_open_tables_state(&open_tables_backup);
|
|
|
|
|
ret= db_repository->load_named_event(thd, dbname, name, &et);
|
|
|
|
|
thd->restore_backup_open_tables_state(&open_tables_backup);
|
|
|
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
|
ret= send_show_create_event(thd, &et, thd->protocol);
|
|
|
|
|
|
2006-02-14 16:20:48 +01:00
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
2005-12-02 13:22:15 +01:00
|
|
|
|
2006-02-16 00:43:11 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Check access rights and fill INFORMATION_SCHEMA.events table.
|
2006-02-28 14:43:49 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@param[in,out] thd Thread context
|
2007-08-15 15:43:08 +02:00
|
|
|
@param[in] tables The temporary table to fill.
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
In MySQL INFORMATION_SCHEMA tables are temporary tables that are
|
|
|
|
|
created and filled on demand. In this function, we fill
|
|
|
|
|
INFORMATION_SCHEMA.events. It is a callback for I_S module, invoked from
|
|
|
|
|
sql_show.cc
|
|
|
|
|
|
|
|
|
|
@return Has to be integer, as such is the requirement of the I_S API
|
|
|
|
|
@retval 0 success
|
|
|
|
|
@retval 1 an error, pushed into the error stack
|
2006-02-16 00:43:11 +01:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
int
|
2006-07-10 13:44:43 +02:00
|
|
|
Events::fill_schema_events(THD *thd, TABLE_LIST *tables, COND * /* cond */)
|
2006-02-16 00:43:11 +01:00
|
|
|
{
|
2006-07-10 13:44:43 +02:00
|
|
|
char *db= NULL;
|
2007-04-05 13:24:34 +02:00
|
|
|
int ret;
|
|
|
|
|
Open_tables_state open_tables_backup;
|
2006-07-10 13:44:43 +02:00
|
|
|
DBUG_ENTER("Events::fill_schema_events");
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
if (check_if_system_tables_error())
|
|
|
|
|
DBUG_RETURN(1);
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2006-07-10 13:44:43 +02:00
|
|
|
/*
|
|
|
|
|
If it's SHOW EVENTS then thd->lex->select_lex.db is guaranteed not to
|
|
|
|
|
be NULL. Let's do an assert anyway.
|
|
|
|
|
*/
|
|
|
|
|
if (thd->lex->sql_command == SQLCOM_SHOW_EVENTS)
|
|
|
|
|
{
|
|
|
|
|
DBUG_ASSERT(thd->lex->select_lex.db);
|
2007-11-30 15:48:22 +01:00
|
|
|
if (!is_schema_db(thd->lex->select_lex.db) && // There is no events in I_S
|
|
|
|
|
check_access(thd, EVENT_ACL, thd->lex->select_lex.db, 0, 0, 0, 0))
|
2006-07-10 13:44:43 +02:00
|
|
|
DBUG_RETURN(1);
|
|
|
|
|
db= thd->lex->select_lex.db;
|
|
|
|
|
}
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
Reset and backup of the currently open tables in this thread
|
|
|
|
|
is a way to allow SELECTs from INFORMATION_SCHEMA.events under
|
|
|
|
|
LOCK TABLES and in pre-locked mode. See also
|
|
|
|
|
Events::show_create_event for additional comments.
|
|
|
|
|
*/
|
|
|
|
|
thd->reset_n_backup_open_tables_state(&open_tables_backup);
|
|
|
|
|
ret= db_repository->fill_schema_events(thd, tables, db);
|
|
|
|
|
thd->restore_backup_open_tables_state(&open_tables_backup);
|
|
|
|
|
|
|
|
|
|
DBUG_RETURN(ret);
|
2006-05-22 20:46:13 +02:00
|
|
|
}
|
2006-02-16 00:43:11 +01:00
|
|
|
|
|
|
|
|
|
2009-07-24 18:20:46 +02:00
|
|
|
/**
|
|
|
|
|
Initializes the scheduler's structures.
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2009-07-24 18:20:46 +02:00
|
|
|
@param opt_noacl_or_bootstrap
|
|
|
|
|
TRUE if there is --skip-grant-tables or --bootstrap
|
|
|
|
|
option. In that case we disable the event scheduler.
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2009-07-24 18:20:46 +02:00
|
|
|
@note This function is not synchronized.
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2009-07-24 18:20:46 +02:00
|
|
|
@retval FALSE Perhaps there was an error, and the event scheduler
|
|
|
|
|
is disabled. But the error is not fatal and the
|
|
|
|
|
server start up can continue.
|
|
|
|
|
@retval TRUE Fatal error. Startup must terminate (call unireg_abort()).
|
2006-05-22 20:46:13 +02:00
|
|
|
*/
|
|
|
|
|
|
2006-07-13 10:59:58 +02:00
|
|
|
bool
|
2009-07-24 18:20:46 +02:00
|
|
|
Events::init(my_bool opt_noacl_or_bootstrap)
|
2006-05-22 20:46:13 +02:00
|
|
|
{
|
2008-05-09 09:43:02 +02:00
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
THD *thd;
|
|
|
|
|
bool res= FALSE;
|
2007-04-05 13:24:34 +02:00
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
DBUG_ENTER("Events::init");
|
2006-08-17 14:22:59 +02:00
|
|
|
|
|
|
|
|
/* We need a temporary THD during boot */
|
|
|
|
|
if (!(thd= new THD()))
|
2006-07-13 10:59:58 +02:00
|
|
|
{
|
2006-08-17 14:22:59 +02:00
|
|
|
res= TRUE;
|
|
|
|
|
goto end;
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
The thread stack does not start from this function but we cannot
|
|
|
|
|
guess the real value. So better some value that doesn't assert than
|
|
|
|
|
no value.
|
|
|
|
|
*/
|
|
|
|
|
thd->thread_stack= (char*) &thd;
|
|
|
|
|
thd->store_globals();
|
2007-11-05 16:25:40 +01:00
|
|
|
lex_start(thd);
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
We will need Event_db_repository anyway, even if the scheduler is
|
|
|
|
|
disabled - to perform events DDL.
|
|
|
|
|
*/
|
|
|
|
|
if (!(db_repository= new Event_db_repository))
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
res= TRUE; /* fatal error: request unireg_abort */
|
2006-08-17 14:22:59 +02:00
|
|
|
goto end;
|
|
|
|
|
}
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
Since we allow event DDL even if the scheduler is disabled,
|
|
|
|
|
check the system tables, as we might need them.
|
2009-07-24 18:20:46 +02:00
|
|
|
|
|
|
|
|
If run with --skip-grant-tables or --bootstrap, don't try to do the
|
|
|
|
|
check of system tables and don't complain: in these modes the tables
|
|
|
|
|
are most likely not there and we're going to disable the event
|
|
|
|
|
scheduler anyway.
|
2007-04-05 13:24:34 +02:00
|
|
|
*/
|
2009-07-24 18:20:46 +02:00
|
|
|
if (opt_noacl_or_bootstrap || Event_db_repository::check_system_tables(thd))
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2009-07-24 18:20:46 +02:00
|
|
|
if (! opt_noacl_or_bootstrap)
|
|
|
|
|
{
|
|
|
|
|
sql_print_error("Event Scheduler: An error occurred when initializing "
|
2009-07-24 20:45:42 +02:00
|
|
|
"system tables. Disabling the Event Scheduler.");
|
|
|
|
|
check_system_tables_error= TRUE;
|
2009-07-24 18:20:46 +02:00
|
|
|
}
|
2007-04-05 13:24:34 +02:00
|
|
|
|
|
|
|
|
/* Disable the scheduler since the system tables are not up to date */
|
|
|
|
|
opt_event_scheduler= EVENTS_DISABLED;
|
2006-08-17 14:22:59 +02:00
|
|
|
goto end;
|
2006-07-13 10:59:58 +02:00
|
|
|
}
|
2007-01-29 18:46:29 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
Was disabled explicitly from the command line, or because we're running
|
2009-07-24 18:20:46 +02:00
|
|
|
with --skip-grant-tables, or --bootstrap, or because we have no system
|
|
|
|
|
tables.
|
2007-04-05 13:24:34 +02:00
|
|
|
*/
|
|
|
|
|
if (opt_event_scheduler == Events::EVENTS_DISABLED)
|
|
|
|
|
goto end;
|
|
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2006-09-01 13:08:44 +02:00
|
|
|
DBUG_ASSERT(opt_event_scheduler == Events::EVENTS_ON ||
|
|
|
|
|
opt_event_scheduler == Events::EVENTS_OFF);
|
2006-07-04 18:44:35 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (!(event_queue= new Event_queue) ||
|
|
|
|
|
!(scheduler= new Event_scheduler(event_queue)))
|
|
|
|
|
{
|
|
|
|
|
res= TRUE; /* fatal error: request unireg_abort */
|
|
|
|
|
goto end;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (event_queue->init_queue(thd) || load_events_from_db(thd) ||
|
2009-07-24 20:45:42 +02:00
|
|
|
(opt_event_scheduler == EVENTS_ON && scheduler->start()))
|
2007-04-05 13:24:34 +02:00
|
|
|
{
|
|
|
|
|
sql_print_error("Event Scheduler: Error while loading from disk.");
|
|
|
|
|
res= TRUE; /* fatal error: request unireg_abort */
|
|
|
|
|
goto end;
|
|
|
|
|
}
|
|
|
|
|
Event_worker_thread::init(db_repository);
|
|
|
|
|
|
2006-08-17 14:22:59 +02:00
|
|
|
end:
|
2007-04-05 13:24:34 +02:00
|
|
|
if (res)
|
|
|
|
|
{
|
|
|
|
|
delete db_repository;
|
|
|
|
|
delete event_queue;
|
|
|
|
|
delete scheduler;
|
|
|
|
|
}
|
2006-08-17 14:22:59 +02:00
|
|
|
delete thd;
|
|
|
|
|
/* Remember that we don't have a THD */
|
|
|
|
|
my_pthread_setspecific_ptr(THR_THD, NULL);
|
|
|
|
|
|
|
|
|
|
DBUG_RETURN(res);
|
2006-05-22 20:46:13 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
Cleans up scheduler's resources. Called at server shutdown.
|
|
|
|
|
|
|
|
|
|
SYNOPSIS
|
2006-06-28 01:28:03 +02:00
|
|
|
Events::deinit()
|
2006-05-22 20:46:13 +02:00
|
|
|
|
|
|
|
|
NOTES
|
|
|
|
|
This function is not synchronized.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
void
|
2006-06-28 01:28:03 +02:00
|
|
|
Events::deinit()
|
2006-05-22 20:46:13 +02:00
|
|
|
{
|
2006-06-28 01:28:03 +02:00
|
|
|
DBUG_ENTER("Events::deinit");
|
2006-07-05 17:12:50 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (opt_event_scheduler != EVENTS_DISABLED)
|
|
|
|
|
{
|
|
|
|
|
delete scheduler;
|
|
|
|
|
scheduler= NULL; /* safety */
|
|
|
|
|
delete event_queue;
|
|
|
|
|
event_queue= NULL; /* safety */
|
2006-08-17 14:22:59 +02:00
|
|
|
}
|
2006-05-22 20:46:13 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
delete db_repository;
|
|
|
|
|
db_repository= NULL; /* safety */
|
|
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
DBUG_VOID_RETURN;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-03-23 16:14:03 +01:00
|
|
|
/**
|
2006-05-22 20:46:13 +02:00
|
|
|
Inits Events mutexes
|
|
|
|
|
|
|
|
|
|
SYNOPSIS
|
|
|
|
|
Events::init_mutexes()
|
|
|
|
|
thd Thread
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
Events::init_mutexes()
|
|
|
|
|
{
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_init(&LOCK_event_metadata, MY_MUTEX_INIT_FAST);
|
2006-05-22 20:46:13 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
Destroys Events mutexes
|
|
|
|
|
|
|
|
|
|
SYNOPSIS
|
|
|
|
|
Events::destroy_mutexes()
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
Events::destroy_mutexes()
|
|
|
|
|
{
|
2006-07-10 13:44:43 +02:00
|
|
|
pthread_mutex_destroy(&LOCK_event_metadata);
|
2006-06-28 15:14:05 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2006-05-22 20:46:13 +02:00
|
|
|
/*
|
2006-07-11 18:28:15 +02:00
|
|
|
Dumps the internal status of the scheduler and the memory cache
|
|
|
|
|
into a table with two columns - Name & Value. Different properties
|
|
|
|
|
which could be useful for debugging for instance deadlocks are
|
|
|
|
|
returned.
|
2006-05-22 20:46:13 +02:00
|
|
|
|
|
|
|
|
SYNOPSIS
|
|
|
|
|
Events::dump_internal_status()
|
|
|
|
|
*/
|
|
|
|
|
|
2006-09-12 12:26:12 +02:00
|
|
|
void
|
|
|
|
|
Events::dump_internal_status()
|
2006-05-22 20:46:13 +02:00
|
|
|
{
|
2006-07-10 13:44:43 +02:00
|
|
|
DBUG_ENTER("Events::dump_internal_status");
|
2006-09-12 12:26:12 +02:00
|
|
|
puts("\n\n\nEvents status:");
|
|
|
|
|
puts("LLA = Last Locked At LUA = Last Unlocked At");
|
|
|
|
|
puts("WOC = Waiting On Condition DL = Data Locked");
|
2006-07-10 13:44:43 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
|
|
|
|
if (opt_event_scheduler == EVENTS_DISABLED)
|
|
|
|
|
puts("The Event Scheduler is disabled");
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
scheduler->dump_internal_status();
|
|
|
|
|
event_queue->dump_internal_status();
|
|
|
|
|
}
|
2006-07-10 13:44:43 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
2006-09-12 12:26:12 +02:00
|
|
|
DBUG_VOID_RETURN;
|
2006-05-22 20:46:13 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2007-03-23 16:14:03 +01:00
|
|
|
/**
|
2007-04-05 13:24:34 +02:00
|
|
|
Starts or stops the event scheduler thread.
|
2006-06-28 14:22:14 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@retval FALSE success
|
|
|
|
|
@retval TRUE error
|
2006-06-28 14:22:14 +02:00
|
|
|
*/
|
|
|
|
|
|
2006-07-04 18:44:35 +02:00
|
|
|
bool
|
2007-04-05 18:47:22 +02:00
|
|
|
Events::switch_event_scheduler_state(enum_opt_event_scheduler new_state)
|
2006-07-04 18:44:35 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
bool ret= FALSE;
|
2006-07-04 18:44:35 +02:00
|
|
|
|
2007-04-05 18:47:22 +02:00
|
|
|
DBUG_ENTER("Events::switch_event_scheduler_state");
|
2006-07-04 18:44:35 +02:00
|
|
|
|
2007-04-05 18:47:22 +02:00
|
|
|
DBUG_ASSERT(new_state == Events::EVENTS_ON ||
|
|
|
|
|
new_state == Events::EVENTS_OFF);
|
2006-07-10 13:44:43 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/*
|
|
|
|
|
If the scheduler was disabled because there are no/bad
|
|
|
|
|
system tables, produce a more meaningful error message
|
|
|
|
|
than ER_OPTION_PREVENTS_STATEMENT
|
|
|
|
|
*/
|
|
|
|
|
if (check_if_system_tables_error())
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(TRUE);
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
pthread_mutex_lock(&LOCK_event_metadata);
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (opt_event_scheduler == EVENTS_DISABLED)
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
my_error(ER_OPTION_PREVENTS_STATEMENT,
|
|
|
|
|
MYF(0), "--event-scheduler=DISABLED or --skip-grant-tables");
|
2006-08-17 14:22:59 +02:00
|
|
|
ret= TRUE;
|
2007-04-05 13:24:34 +02:00
|
|
|
goto end;
|
2006-08-17 14:22:59 +02:00
|
|
|
}
|
|
|
|
|
|
2007-04-05 18:47:22 +02:00
|
|
|
if (new_state == EVENTS_ON)
|
2007-04-05 13:24:34 +02:00
|
|
|
ret= scheduler->start();
|
2006-08-17 14:22:59 +02:00
|
|
|
else
|
2007-04-05 13:24:34 +02:00
|
|
|
ret= scheduler->stop();
|
|
|
|
|
|
|
|
|
|
if (ret)
|
2006-08-17 14:22:59 +02:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
my_error(ER_EVENT_SET_VAR_ERROR, MYF(0));
|
|
|
|
|
goto end;
|
2006-08-17 14:22:59 +02:00
|
|
|
}
|
|
|
|
|
|
2007-04-05 18:47:22 +02:00
|
|
|
opt_event_scheduler= new_state;
|
2006-08-17 14:22:59 +02:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
end:
|
|
|
|
|
pthread_mutex_unlock(&LOCK_event_metadata);
|
2006-08-17 14:22:59 +02:00
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
2007-01-29 18:46:29 +01:00
|
|
|
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
/**
|
|
|
|
|
Loads all ENABLED events from mysql.event into a prioritized
|
|
|
|
|
queue.
|
2007-01-29 18:46:29 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
This function is called during the server start up. It reads
|
|
|
|
|
every event, computes the next execution time, and if the event
|
|
|
|
|
needs execution, adds it to a prioritized queue. Otherwise, if
|
|
|
|
|
ON COMPLETION DROP is specified, the event is automatically
|
|
|
|
|
removed from the table.
|
2007-01-29 18:46:29 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@param[in,out] thd Thread context. Used for memory allocation in some cases.
|
2007-01-29 18:46:29 +01:00
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
@retval FALSE success
|
|
|
|
|
@retval TRUE error, the load is aborted
|
|
|
|
|
|
|
|
|
|
@note Reports the error to the console
|
2007-01-29 18:46:29 +01:00
|
|
|
*/
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
bool
|
2007-01-29 18:46:29 +01:00
|
|
|
Events::load_events_from_db(THD *thd)
|
|
|
|
|
{
|
|
|
|
|
TABLE *table;
|
|
|
|
|
READ_RECORD read_record_info;
|
2007-04-05 13:24:34 +02:00
|
|
|
bool ret= TRUE;
|
2007-01-29 18:46:29 +01:00
|
|
|
uint count= 0;
|
2007-10-19 17:57:08 +02:00
|
|
|
ulong saved_master_access;
|
2007-01-29 18:46:29 +01:00
|
|
|
|
|
|
|
|
DBUG_ENTER("Events::load_events_from_db");
|
2007-03-02 00:39:00 +01:00
|
|
|
DBUG_PRINT("enter", ("thd: 0x%lx", (long) thd));
|
2007-01-29 18:46:29 +01:00
|
|
|
|
2007-10-19 17:57:08 +02:00
|
|
|
/*
|
|
|
|
|
NOTE: even if we run in read-only mode, we should be able to lock the
|
|
|
|
|
mysql.event table for writing. In order to achieve this, we should call
|
|
|
|
|
mysql_lock_tables() under the super user.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
saved_master_access= thd->security_ctx->master_access;
|
|
|
|
|
thd->security_ctx->master_access |= SUPER_ACL;
|
|
|
|
|
|
|
|
|
|
ret= db_repository->open_event_table(thd, TL_WRITE, &table);
|
|
|
|
|
|
|
|
|
|
thd->security_ctx->master_access= saved_master_access;
|
|
|
|
|
|
|
|
|
|
if (ret)
|
2007-01-29 18:46:29 +01:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
sql_print_error("Event Scheduler: Failed to open table mysql.event");
|
|
|
|
|
DBUG_RETURN(TRUE);
|
2007-01-29 18:46:29 +01:00
|
|
|
}
|
|
|
|
|
|
2008-07-15 19:46:02 +02:00
|
|
|
init_read_record(&read_record_info, thd, table, NULL, 0, 1, FALSE);
|
2007-01-29 18:46:29 +01:00
|
|
|
while (!(read_record_info.read_record(&read_record_info)))
|
|
|
|
|
{
|
|
|
|
|
Event_queue_element *et;
|
2007-04-05 13:24:34 +02:00
|
|
|
bool created;
|
|
|
|
|
bool drop_on_completion;
|
|
|
|
|
|
2007-01-29 18:46:29 +01:00
|
|
|
if (!(et= new Event_queue_element))
|
2007-04-05 13:24:34 +02:00
|
|
|
goto end;
|
|
|
|
|
|
2007-01-29 18:46:29 +01:00
|
|
|
DBUG_PRINT("info", ("Loading event from row."));
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (et->load_from_row(thd, table))
|
2007-01-29 18:46:29 +01:00
|
|
|
{
|
2007-03-23 17:14:08 +01:00
|
|
|
sql_print_error("Event Scheduler: "
|
2007-04-05 23:53:15 +02:00
|
|
|
"Error while loading events from mysql.event. "
|
|
|
|
|
"The table probably contains bad data or is corrupted");
|
2007-01-29 18:46:29 +01:00
|
|
|
delete et;
|
2007-04-05 13:24:34 +02:00
|
|
|
goto end;
|
2007-01-29 18:46:29 +01:00
|
|
|
}
|
2007-04-05 13:24:34 +02:00
|
|
|
drop_on_completion= (et->on_completion ==
|
2008-05-09 09:43:02 +02:00
|
|
|
Event_parse_data::ON_COMPLETION_DROP);
|
2007-01-29 18:46:29 +01:00
|
|
|
|
|
|
|
|
|
2007-04-05 13:24:34 +02:00
|
|
|
if (event_queue->create_event(thd, et, &created))
|
2007-01-29 18:46:29 +01:00
|
|
|
{
|
2007-04-05 13:24:34 +02:00
|
|
|
/* Out of memory */
|
|
|
|
|
delete et;
|
|
|
|
|
goto end;
|
2007-01-29 18:46:29 +01:00
|
|
|
}
|
2007-04-05 13:24:34 +02:00
|
|
|
if (created)
|
|
|
|
|
count++;
|
|
|
|
|
else if (drop_on_completion)
|
2007-01-29 18:46:29 +01:00
|
|
|
{
|
|
|
|
|
/*
|
2007-04-05 13:24:34 +02:00
|
|
|
If not created, a stale event - drop if immediately if
|
2008-02-22 16:18:31 +01:00
|
|
|
ON COMPLETION NOT PRESERVE.
|
|
|
|
|
XXX: This won't be replicated, thus the drop won't appear in
|
|
|
|
|
in the slave. When the slave is restarted it will drop events.
|
|
|
|
|
However, as the slave will be "out of sync", it might happen that
|
|
|
|
|
an event created on the master, after master restart, won't be
|
|
|
|
|
replicated to the slave correctly, as the create will fail there.
|
2007-01-29 18:46:29 +01:00
|
|
|
*/
|
2007-04-05 13:24:34 +02:00
|
|
|
int rc= table->file->ha_delete_row(table->record[0]);
|
|
|
|
|
if (rc)
|
|
|
|
|
{
|
|
|
|
|
table->file->print_error(rc, MYF(0));
|
|
|
|
|
goto end;
|
2007-01-29 18:46:29 +01:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
2007-04-05 13:24:34 +02:00
|
|
|
sql_print_information("Event Scheduler: Loaded %d event%s",
|
|
|
|
|
count, (count == 1) ? "" : "s");
|
|
|
|
|
ret= FALSE;
|
|
|
|
|
|
2007-01-29 18:46:29 +01:00
|
|
|
end:
|
|
|
|
|
end_read_record(&read_record_info);
|
|
|
|
|
|
|
|
|
|
close_thread_tables(thd);
|
|
|
|
|
|
|
|
|
|
DBUG_RETURN(ret);
|
|
|
|
|
}
|
2007-08-15 17:08:44 +02:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
@} (End of group Event_Scheduler)
|
|
|
|
|
*/
|