By default MyISAM overwrites .MYD and .MYI files no 
DATA DIRECTORY option is used. This can lead to two tables
using the same .MYD and .MYI files (that can't be dropped).

To prevent CREATE TABLE from overwriting a file a new option
is introduced : keep_files_on_create
When this is on the CREATE TABLE throws an error if either
the .MYD or .MYI exists for a MyISAM table.
The option is off by default (resulting in compatible behavior).


include/my_base.h:
  Bug #29325: introduce keep_files_on_create
myisam/mi_create.c:
  Bug #29325: introduce keep_files_on_create
mysql-test/r/create.result:
  Bug #29325: test case
mysql-test/t/create.test:
  Bug #29325: test case
sql/ha_myisam.cc:
  Bug #29325: introduce keep_files_on_create
sql/set_var.cc:
  Bug #29325: introduce keep_files_on_create
sql/sql_class.h:
  Bug #29325: introduce keep_files_on_create
sql/sql_table.cc:
  Bug #29325: introduce keep_files_on_create
sql/unireg.cc:
  Bug #29325: introduce keep_files_on_create

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug29392


sql/item.h:
  Auto merged

into  gleb.loc:/home/uchum/work/bk/5.0-opt

The SELECT INTO OUTFILE FIELDS ENCLOSED BY digit or minus sign,
followed by the same LOAD DATA INFILE statement, used wrond encoding
of non-string fields contained the enclosed character in their text
representation.

Example:
  SELECT 15, 9 INTO OUTFILE 'text' FIELDS ENCLOSED BY '5';

Old encoded result in the text file:
  5155 595
         ^ was decoded as the 1st enclosing character of the 2nd field;
        ^ was skipped as garbage;
  ^    ^ was decoded as a pair of englosing characters of the 1st field;
      ^   was decoded as traling space of the first field;
    ^^ was decoded as a doubled enclosed character.

New encoded result in the text file:
  51\55 595
  ^   ^ pair of enclosing characters of the 1st field;
    ^^ escaped enclosed character.



sql/sql_class.h:
  Fixed bug #29442.
  The NUMERIC_CHARS macro constant has been defined to enumerate
  all possible characters of a numeric value text representation.
  The select_export::is_unsafe_field_sep boolean flag has been added
  to apply the encoding algorithm to non-string values when it is
  necessary.
sql/sql_class.cc:
  Fixed bug #29442.
  The select_export::send_data method has been modified to encode text
  representation of fields of all data types like string fields.
mysql-test/t/loaddata.test:
  Updated test case for bug #29442.
mysql-test/r/loaddata.result:
  Updated test case for bug #29442.

AsText() needs to know the maximum number of
characters a IEEE double precision value can
occupy to make sure there's enough buffer space.
The number was too small to hold all possible
values and this caused buffer overruns.
Fixed by correcting the calculation of the 
maximum digits in a string representation of an
IEEE double precision value as printed by 
String::qs_append(double).


mysql-test/r/gis.result:
  Bug #29166: test case
mysql-test/t/gis.test:
  Bug #29166: test case
sql/spatial.cc:
  Bug #29166: correct calculation of the maximum digits in
  a string representation of a double

This bug may manifest itself for select queries over a multi-table view
that includes an ORDER BY clause in its definition. If the select list of 
the query contains references to the same view column with different
aliases the names of the columns in the result output will be nevertheless
the same, coinciding with one of the alias.

The bug happened because the method Item_ref::get_tmp_table_item that
was inherited by the class Item_direct_view_ref ignored the fact that
the name of the view column reference must be inherited by the fields
of the temporary table that was created in order to get the result rows
sorted.


mysql-test/r/view.result:
  Added a test case for bug #29392.
mysql-test/t/view.test:
  Added a test case for bug #29392.
sql/item.h:
  Fixed bug #29392.
  This bug may manifest itself for select queries over a multi-table view
  that includes an ORDER BY clause in its definition. If the select list of 
  the query contains references to the same view column with different
  aliases the names of the columns in the result output will be nevertheless
  the same, coinciding with one of the alias.
  
  The bug happened because the method Item_ref::get_tmp_table_item that
  was inherited by the class Item_direct_view_ref ignored the fact that
  the name of the view column reference must be inherited by the fields
  of the temporary table that was created in order to get the result rows
  sorted.
  
  Fixed by providing a proper implementation of the get_tmp_table_item 
  method for the Item_direct_view_ref class.

into  gleb.loc:/home/uchum/work/bk/5.0-opt


sql/sql_class.h:
  Auto merged

if item_func->argument_count()==0

  Updated test case for bug #29294.


mysql-test/t/loaddata.test:
  Updated test case for bug #29294.
mysql-test/r/loaddata.result:
  Updated test case for bug #29294.

into  gleb.loc:/home/uchum/work/bk/5.0-opt


sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_load.cc:
  Auto merged
mysql-test/r/loaddata.result:
  Merge with 4.1-opt.
mysql-test/t/loaddata.test:
  Merge with 4.1-opt.

into  gleb.loc:/home/uchum/work/bk/4.1-opt

  Test case update for bug #29294.


mysql-test/t/loaddata.test:
  Test case update for bug #29294.
mysql-test/r/loaddata.result:
  Test case update for bug #29294.

  Windows compilation error fix.


sql/sql_class.cc:
  Windows compilation error fix.

The `SELECT 'r' INTO OUTFILE ... FIELDS ENCLOSED BY 'r' ' statement
encoded the 'r' string to a 4 byte string of value x'725c7272'
(sequence of 4 characters: r\rr).
The LOAD DATA statement decoded this string to a 1 byte string of
value x'0d' (ASCII Carriage Return character) instead of the original
'r' character.
The same error also happened with the FIELDS ENCLOSED BY clause
followed by special characters: 'n', 't', 'r', 'b', '0', 'Z' and 'N'.

NOTE 1: This is a result of the undocumented feature: the LOAD DATA INFILE
recognises 2-byte input sequences like \n, \t, \r and \Z in addition
to documented 2-byte sequences: \0 and \N. This feature should be
documented (here backspace character is a default ESCAPED BY character,
in the real-life example it may be any ESCAPED BY character).

NOTE 2, changed behaviour:
Now the `SELECT INTO OUTFILE' statement with the `FIELDS ENCLOSED BY'
clause followed by one of: 'n', 't', 'r', 'b', '0', 'Z' or 'N' characters
encodes this special character itself by doubling it ('r' --> 'rr'),
not by prepending it with an escape character.


sql/sql_class.h:
  Fixed bug #29294.
  The ESCAPE_CHARS macro constant is defined to enumerate
  symbolic names of espace-sequences like  '\n', '\t' etc.
  The select_export::is_ambiguous_field_sep field has been added
  to distinguish special values of the field_sep field from
  another values (see ESCAPE_CHARS).
sql/sql_class.cc:
  Fixed bug #29294.
  The select_export::send_data method has been modified to
  encode special values of the field_sep field by
  doubling of those values instead of prepending them with a
  value of the escape_char field.
  Example: The SELECT 'r' INTO OUTFILE FIELDS ENCLOSED BY 'r'
  now produces the 'rr' output string instead of x'5c72'
  (i.e. instead of sequence of 2 bytes: \ and r).
sql/sql_load.cc:
  Fixed bug #29294.
  Added commentary for the READ_INFO::unescape method.
mysql-test/t/loaddata.test:
  Updated test case for bug #29294.
mysql-test/r/loaddata.result:
  Updated test case for bug #29294.

into  mysql.com:/home/bar/mysql-work/mysql-5.0.b27345

into  magare.gmz:/home/kgeorge/mysql/autopush/B28983-2-5.0-opt

asserts debug binary

We can't reliably check if the binary log is opened without 
acquiring its mutex. 
Fixed by removing this check.


sql/log.cc:
  Bug #28983: 
  can't reliably check if bin_log is open outside of its mutex

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

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


sql/sql_yacc.yy:
  Auto merged

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


sql/item_sum.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-4.1-merge

This bug may manifest itself not only with the queries for which
the index-merge access method is chosen. It also may display
itself for queries with DISTINCT.

The bug was in how the Unique::get method used the merge_buffers
function. To compare elements in the the queue employed by
merge_buffers() it must use the buffpek_compare function rather
than the function for binary comparison. 


mysql-test/r/innodb_mysql.result:
  Added a test case for bug #25798.
mysql-test/t/innodb_mysql.test:
  Added a test case for bug #25798.
sql/filesort.cc:
  Fixed bug #25798.
  The function merge_buffers() when called from the Uniques::get method
  must use function buffpek_compare to compare elements in the queue it
  employs. The pointer to buffpek_compare and the info for the function
  that compares sorted records are passed to merge_buffers through certain 
  designated fields of the SORTPARAM structure.
sql/sql_sort.h:
  Fixed bug #25798.
  Added fields to the SORTPARAM structure to be used in the function 
  merge_buffers when called by the Uniques::get method.
sql/uniques.cc:
  Fixed bug 25798.
  The function merge_buffers() when called from the Uniques::get method
  must use function buffpek_compare to compare elements in the queue it
  employes.

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


sql/sql_class.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged

mysql-test/r/ps_6bdb.result:
  Update test results (character sets patch).

into  olga.mysql.com:/home/igor/mysql-5.0-opt


mysql-test/r/type_enum.result:
  Auto merged
mysql-test/t/type_enum.test:
  Auto merged
sql/field_conv.cc:
  SCCS merged

into  gleb.loc:/home/uchum/work/bk/5.0-opt

When a UNION statement forced conversion of an UTF8
charset value to a binary charset value, the byte
length of the result values was truncated to the
CHAR_LENGTH of the original UTF8 value.


sql/item.cc:
  Fixed bug #29205.
  The calculation of data length was modified in
  the Item_type_holder::join_types method to take into
  account possible conversion of a multibyte charset
  value to a binary charset value, when each
  multibyte character is converted into a sequence
  of bytes (not to a single byte of binary charset).
mysql-test/t/ctype_utf8.test:
  Updated test case for bug #29205.
mysql-test/r/ctype_utf8.result:
  Updated test case for bug #29205.

into  moonbone.local:/mnt/gentoo64/work/29261-bug-5.0-opt-mysql

spaces.

When the my_strnncollsp_simple function compares two strings and one is a prefix
of another then this function compares characters in the rest of longer key
with the space character to find whether the longer key is greater or less.
But the sort order of the collation isn't used in this comparison. This may
lead to a wrong comparison result, wrongly created index or wrong order of the
result set of a query with the ORDER BY clause.

Now the my_strnncollsp_simple function uses collation sort order to compare
the characters in the rest of longer key with the space character.


mysql-test/t/ctype_collate.test:
  Added a test case for the bug#29261: Sort order of the collation wasn't used
  when comparing trailing spaces.
mysql-test/r/ctype_collate.result:
  Added a test case for the bug#29261: Sort order of the collation wasn't used
  when comparing trailing spaces.
strings/ctype-simple.c:
  Bug#29261: Sort order of the collation wasn't used when comparing trailing
  spaces.
  Now the my_strnncollsp_simple function uses collation sort order to compare
  the characters in the rest of longer key with the space character.

mysql-test/r/ps_6bdb.result:
  Update result file.
mysql-test/r/ps_7ndb.result:
  Update result file.

mysql-test/r/ps_1general.result:
  Update result file.
mysql-test/r/ps_2myisam.result:
  Update result file.
mysql-test/r/ps_3innodb.result:
  Update result file.
mysql-test/r/ps_4heap.result:
  Update result file.
mysql-test/r/ps_5merge.result:
  Update result file.
tests/mysql_client_test.c:
  Fix test -- after field changing character set to utf8 in the server,
  length should be calculated differently.

into  magare.gmz:/home/kgeorge/mysql/autopush/B27333-gcov-5.0-opt

query / no aggregate of subquery
 The optimizer counts the aggregate functions that 
 appear as top level expressions (in all_fields) in 
 the current subquery. Later it makes a list of these
 that it uses to actually execute the aggregates in
 end_send_group().
 That count is used in several places as a flag whether
 there are aggregates functions.
 While collecting the above info it must not consider
 aggregates that are not aggregated in the current 
 context. It must treat them as normal expressions 
 instead. Not doing that leads to incorrect data about
 the query, e.g. running a query that actually has no
 aggregate functions as if it has some (and hence is
 expected to return only one row).
 Fixed by ignoring the aggregates that are not aggregated
 in the current context. 
 One other smaller omission discovered and fixed in the 
 process : the place of aggregation was not calculated for
 user defined functions. Fixed by calling 
 Item_sum::init_sum_func_check() and 
 Item_sum::check_sum_func() as it's done for the rest of 
 the aggregate functions.


mysql-test/r/subselect.result:
  Bug #27333: test case
mysql-test/t/subselect.test:
  Bug #27333: test case
sql/item_subselect.cc:
  Bug#27333: need select_lex to filter out
   aggregates that are not aggregated in
   the current select.
sql/item_sum.cc:
  Bug#27333: need select_lex to filter out
   aggregates that are not aggregated in
   the current select.
sql/item_sum.h:
  Bug#27333: calculate the place of 
   aggregation for user defined functions.
sql/sql_select.cc:
  Bug#27333: When counting the aggregated functions
   and collecting a list of them we must not consider
   the aggregates that are not aggregated in the local
   context as "local" : i.e. we must treat them as 
   normal functions and not add them to the aggregate
   functions list.
sql/sql_select.h:
  Bug#27333: need select_lex to filter out
   aggregates that are not aggregated in
   the current select.

into  mysql.com:/home/hf/work/29247/my50-29247


sql-common/client.c:
  Auto merged

SHOW CREATE TABLE or SELECT FROM I_S.

Actually, the bug discovers two problems:
  - the original query is not preserved properly. This is the problem
    of BUG#16291;
  - the resultset of SHOW CREATE TABLE statement is binary.

This patch fixes the second problem for the 5.0.

Both problems will be fixed in 5.1.


mysql-test/r/show_check.result:
  Update result file.
mysql-test/t/show_check.test:
  Provide test case for BUG#10491.
sql/item.h:
  Use utf8_general_ci instead of binary collation by default,
  because for views and base tables utf8 is the character set
  in which their definition is stored. For system constants
  it's the default character set, and for other objects
  (routines, triggers), no character set is stored, and
  therefore no character set is known, so returning utf8
  is just as good as any non-binary character set.
  This latter problem is fixed in 5.1 by 16291. In 5.1
  we will return the "real" character set.

Problem: like_range() returned wrong ranges for contractions (like 'ch' in Czech').
Fix: adding a special code to handle tricky cases:
- contraction head followed by a wild character
- full contraction
- contraction part followed by another contraction part,
  but they are not a contraction together.


mysql-test/r/ctype_uca.result:
  Adding test case
mysql-test/t/ctype_uca.test:
  Adding test case
strings/ctype-mb.c:
  Adding test case
strings/ctype-uca.c:
  Allocate additional 256 bytes for flags "is contraction part".
strings/ctype-ucs2.c:
  Adding test case

into  magare.gmz:/home/kgeorge/mysql/autopush/B26642-5.0-opt

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-rt-merge

into  dl145s.mysql.com:/dev/shm/mhansson/my50-bug28677


sql/sql_class.h:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged