ALTER VIEW is currently not supported as a prepared statement
and should be disabled as such as they otherwise could cause server crashes.

ALTER VIEW is currently not supported when called from stored
procedures or functions for related reasons and should also be disabled.

This patch disables these DDL statements and adjusts the appropriate test
cases accordingly.

Additional tests has been added to reflect on the fact that we do support
CREATE/ALTER/DROP TABLE for Prepared Statements (PS), Stored Procedures (SP)
and PS within SP.


mysql-test/r/ps_1general.result:
  - Updated test to reflect on the new policy to disallow ALTER VIEW within SP.
mysql-test/r/sp-dynamic.result:
  - Added PS ALTER TABLE test from within SP-context to demonstrate that CREATE/ALTER/DROP
  TABLE statements is working.
  - Added PS CREATE/ALTER/DROP VIEW tests from within SP-context to show that
  ALTER VIEW is not supported, CREATE VIEW/DROP VIEW are supported.
mysql-test/r/sp-error.result:
  - Updated test to reflect on the new policy to disallow VIEW DDL within SP.
mysql-test/t/ps_1general.test:
  - Updated test to reflect on the new policy to disallow VIEW DDL within SP.
mysql-test/t/sp-dynamic.test:
  - Add PS ALTER TABLE test from within SP to demonstrate that CREATE/ALTER/DROP
  TABLE statements are supported.
mysql-test/t/sp-error.test:
  - Updated test to reflect on the new policy to disallow ALTER VIEW
  within SP-context.
  - Changed error code 1314 to the more abstract ER_SP_BADSTATEMENT.
sql/sql_class.h:
  - Added comment for clarity
sql/sql_parse.cc:
  - Added comment for clarity
sql/sql_prepare.cc:
  - Disallow ALTER VIEW as prepared statements until they are
    properly supported. Note that SQLCOM_CREATE_VIEW also handles ALTER VIEW
    statements.
sql/sql_view.cc:
  - converted to doxygen comments
  - Added comment for clarity
sql/sql_yacc.yy:
  - Disallow ALTER VIEW statements within a SP.
  If the parser is operating within the SP context, this is shown
  on the sp->sphead pointer. If this flag is set for view DDL operations
  we stop parsing with the error 'ER_SP_BAD_STATEMENT'.

into  ibm.:/home/alik/Documents/MySQL/devel/5.0-rt-bug275920-2

value using prepared statements.


tests/mysql_client_test.c:
  Test case.

using prepared statements.


sql/field.cc:
  Using MAX_DATETIME_WIDTH or MAX_DATETIME_COMPRESSED_WIDTH
  constants for the length of DATETIME fields.
  
  Using MAX_DATE_STRING_REP_LENGTH for allocating buffers
  for date/time/... string representation.
sql/item_timefunc.cc:
  Using MAX_DATETIME_WIDTH or MAX_DATETIME_COMPRESSED_WIDTH
  constants for the length of DATETIME fields.
  
  Using MAX_DATE_STRING_REP_LENGTH for allocating buffers
  for date/time/... string representation.
sql/unireg.h:
  Introduce a constant for length of datetime compressed
  format (YYYYMMDDHHMMSS).

mysql-test/r/rpl_loaddata.result:
  Update result.
mysql-test/t/rpl_loaddata.test:
  Fix a typo in the test file.

mysql-test/r/sp.result:
  Update results.
mysql-test/t/mysql.test:
  Fix a typo.
mysql-test/t/mysqltest.test:
  Fix a typo.
mysql-test/t/order_by.test:
  Fix a typo.
mysql-test/t/row.test:
  Remove an unsupported command.
mysql-test/t/sp.test:
  Fix a typo.
mysql-test/t/subselect3.test:
  Fix  mysqltest warnings - now it warns when sees some suspicious --
  comment

into  mysql.com:/nfsdisk1/lars/bk/mysql-5.0-rpl


mysql-test/t/disabled.def:
  Auto merged

refining the test because of Bug #28786 'reset master' does not reset binlogging on embeded server


mysql-test/t/binlog_killed.test:
  the test can not pass on embedded server. Setting the include-guard.

test comments correction


mysql-test/r/binlog_killed.result:
  changed
mysql-test/t/binlog_killed.test:
  wrong comments (but important ones) left;
  little refinement in result calc

combining the final result variable in such way that either option of the test execution
will yield zero.


mysql-test/r/binlog_killed.result:
  results changed
mysql-test/t/binlog_killed.test:
  there are two options for the test passing:
  1. no rows inserted and the INSERT gets killed, then there is no INSERT query in binlog
  2. all rows inserted, then INSERT gets to binlog and error_code is zero

tests refining, see binlog_killed.test file for details


mysql-test/r/binlog_killed.result:
  results changed
mysql-test/t/binlog_killed.test:
  killer conn waits for the first row to appear;
  log-disabling kill query since prey's id is not deterministic;
  correcting pattern to search in binlog for insert query;

refining the test.


mysql-test/t/binlog_killed.test:
  due to killing reap may catch an error though it's indeterministic.

result file updated


mysql-test/r/binlog_killed.result:
  results updated

  
Refining the tests since pb revealed the older version's fragality - the error from SF() due to killed
may be different on different env:s.
DBUG_ASSERT instead of assert.


mysql-test/r/binlog_killed.result:
  new result file
mysql-test/t/binlog_killed.test:
  regression for bug#22725 simplified. tests for bug27563, BUG#27565 made inactive.
sql/sql_insert.cc:
  DBUG_ASSERT

into  adventure.(none):/home/thek/Development/cpp/mysql-5.0-runtime


sql/mysqld.cc:
  Auto merged

  
The reason for the bug was that replaying of a query on slave could not be possible since its event
was recorded with the killed error. Due to the specific of handling INSERT, which per-row-while-loop is 
unbreakable to killing, the query on transactional table should have not appeared in binlog unless
there was  a call to a stored routine that got interrupted with killing (and then there must be an error
returned out of the loop).
   
The offered solution added the following rule for binlogging of INSERT that accounts the above
specifics:
For INSERT on transactional-table if the error was not set the only raised flag
is harmless and is ignored via masking out on time of creation of binlog event.
   
For both table types the combination of raised error and KILLED flag indicates that there
was potentially partial execution on master and consistency is under the question.
In that case the code continues to binlog an event with an appropriate killed error.
 
The fix relies on the specified behaviour of stored routine that must propagate the error 
to the top level query handling if the thd->killed flag was raised in the routine execution.
   
The patch adds an arg with the default killed-status-unset value to Query_log_event::Query_log_event.


sql/log_event.cc:
  killed_status as the value of thd->killed can be passed as an arg to the constructor.
  if the value is different from the default the arg is set to the current thd->killed value.
  A caller might need to masquerade thd->killed with THD::NOT_KILLED.
  So far only mysql_insert() uses such explicit way to tell the constructor about killing status.
sql/log_event.h:
  default arg to the constructor with meaning of killed status of the query. 
  if the arg is not explicitly provided the status of thd->killed will be snapshot 
  inside of the constuctor, which is potentially incorrect (see bug#27571)
sql/sql_class.h:
  extending killed_state with no-state member.
sql/sql_insert.cc:
  ignore the KILLED flag incl KILL_BAD_DATA when the INSERT query event 
  is created without an `error';
sql/sql_update.cc:
  Suggestion how to fix bug#27571 as comments.
mysql-test/r/binlog_killed.result:
  new result file
mysql-test/t/binlog_killed.test:
  regression tests also apply for bug27563, BUG#27565

- A race condition caused brief unavailablility when trying to acccess
  a table.
- The unprotected variable 'grant_option' wasn't intended to alternate
  during normal execution. Variable initialization moved to grant_init
  a lines responsible for the alternation are removed. 


sql/mysqld.cc:
  - Added documentation to describe grant_option flag.
sql/sql_acl.cc:
  - This patch removes lines which causes grant_option to alternate and moves
    variable initialization to the grant_init()-function.

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.0-merge


mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/t/disabled.def:
  Auto merged
sql/sql_load.cc:
  Auto merged

sql/sql_lex.cc:
  Fixed parenthese typo, found during code review

The root cause of this bug is related to the function skip_rear_comments,
in sql_lex.cc

Recent code changes in skip_rear_comments changed the prototype from
"const uchar*" to "const char*", which had an unforseen impact on this test:
  (endp[-1] < ' ')
With unsigned characters, this code filters bytes of value [0x00 - 0x20]
With *signed* characters, this also filters bytes of value [0x80 - 0xFF].

This caused the regression reported, considering cyrillic characters in the
parameter name to be whitespace, and truncated.
Note that the regression is present both in 5.0 and 5.1.

With this fix:
- [0x80 - 0xFF] bytes are no longer considered whitespace.
This alone fixes the regression.

In addition, filtering [0x00 - 0x20] was found bogus and abusive,
so that the code now filters uses my_isspace when looking for whitespace.

Note that this fix is only addressing the regression affecting UTF-8
in general, but does not address a more fundamental problem with
skip_rear_comments: parsing a string *backwards*, starting at end[-1],
is not safe with multi-bytes characters, so that end[-1] can confuse the
last byte of a multi-byte characters with a characters to filter out.

The only known impact of this remaining issue affects objects that have to
meet all the conditions below:

- the object is a FUNCTION / PROCEDURE / TRIGGER / EVENT / VIEW
- the body consist of only *1* instruction, and does *not* contain a
  BEGIN-END block
- the instruction ends, lexically, with <ident> <whitespace>* ';'?
  For example, "select <ident>;" or "return <ident>;"
- The last character of <ident> is a multi-byte character
- the last byte of this character is ';' '*', '/' or whitespace

In this case, the body of the object will be truncated after parsing,
and stored in an invalid format.

This last issue has not been fixed in this patch, since the real fix
will be implemented by Bug 25411 (trigger code truncated), which is caused
by the very same code.
The real problem is that the function skip_rear_comments is only a
work-around, and should be removed entirely: see the proposed patch for
bug 25411 for details.


sql/sp_head.cc:
  In skip_rear_comments,
  Filter out only whitespace, not other (non ascii or control) valid characters
sql/sql_lex.cc:
  In skip_rear_comments,
  Filter out only whitespace, not other (non ascii or control) valid characters
sql/sql_lex.h:
  In skip_rear_comments,
  Filter out only whitespace, not other (non ascii or control) valid characters
sql/sql_view.cc:
  In skip_rear_comments,
  Filter out only whitespace, not other (non ascii or control) valid characters
tests/mysql_client_test.c:
  Bug#27876 (SF with cyrillic variable name fails during execution (regression))

into  vajra.(none):/opt/local/work/mysql-5.0-runtime


sql/mysql_priv.h:
  Auto merged
sql/sql_base.cc:
  Auto merged

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build


configure.in:
  Auto merged
include/my_global.h:
  Auto merged
sql/item_func.cc:
  Auto merged
strings/strtod.c:
  Auto merged

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build-work

As MySQL character set tests can print results in many character sets
(latin1, utf8-8, sjis, cp932 and others) - its output can be incompatible
with the current locale settings, which makes PERL confuse.

Fix: reset LC_ALL and LC_CTYPE to "C", which is compatible with
any character set.


mysql-test/mysql-test-run.pl:
  Ignore current locale settings, because "mysqltest" output
  can be not compatible with the locale.

 Bug #23667 "CREATE TABLE LIKE is not isolated from alteration
             by other connections"
 Bug #18950 "CREATE TABLE LIKE does not obtain LOCK_open"
As well as:
 Bug #25578 "CREATE TABLE LIKE does not require any privileges
             on source table".

The first and the second bugs resulted in various errors and wrong
binary log order when one tried to execute concurrently CREATE TABLE LIKE
statement and DDL statements on source table or DML/DDL statements on its
target table.

The problem was caused by incomplete protection/table-locking against
concurrent statements implemented in mysql_create_like_table() routine.
We solve it by simply implementing such protection in proper way (see
comment for sql_table.cc for details).

The third bug allowed user who didn't have any privileges on table create
its copy and therefore circumvent privilege check for SHOW CREATE TABLE.

This patch solves this problem by adding privilege check, which was missing.

Finally it also removes some duplicated code from mysql_create_like_table().

Note that, altough tests covering concurrency-related aspects of CREATE TABLE
LIKE behaviour will only be introduced in 5.1, they were run manually for
this patch as well.


mysql-test/r/grant2.result:
  Added test for bug#25578 "CREATE TABLE LIKE does not require any privileges
  on source table".
mysql-test/t/grant2.test:
  Added test for bug#25578 "CREATE TABLE LIKE does not require any privileges
  on source table".
sql/handler.h:
  Introduced new flag for HA_CREATE_INFO::options in order to be able to
  distinguish CREATE TABLE ... LIKE from other types of CREATE TABLE.
sql/mysql_priv.h:
  mysql_create_like_table() now takes source table name not as a
  Table_ident object but as regular table list element.
sql/sql_parse.cc:
  CREATE TABLE ... LIKE implementation now uses statement's table list
  for storing information about the source table. We also use flag
  in LEX::create_info.options for distinguishing it from other types
  of CREATE TABLE.
  Finally CREATE TABLE ... LIKE now requires the same privileges on
  the source tables as SHOW CREATE TABLE. Moved this privilege check
  to check_show_create_table_access() function.
sql/sql_table.cc:
  mysql_create_like_table():
   - Provided proper protection from concurrent statements.
     This is achieved by keeping name-lock on the source table and holding
     LOCK_open mutex during whole operation. This gives protection against
     concurrent DDL on source table. Also holding this mutex makes copying
     of .frm file, call to ha_create_table() and binlogging atomic against
     concurrent DML and DDL operations on target table.
   - Get rid of duplicated code related to source database/table name
     handling. All these operations are already done in
     st_select_lex::add_table_to_list(), so we achieve the same effect
     by including source table into the statement's table list.
sql/sql_yacc.yy:
  Now we use special flag in LEX::create_info::options for distinguishing
  CREATE TABLE ... LIKE from other types of CREATE TABLE and store name
  of source table as regular element in statement's table list.

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build


configure.in:
  Auto merged
sql/item_func.cc:
  Auto merged

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-4.1-engines

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build-work

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into  whalegate.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

into  trift2.:/MySQL/M50/push-5.0