test if TRUNCATE TABLE works with keep_files_on_create

into  magare.gmz:/home/kgeorge/mysql/autopush/B29325-5.0-opt

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).

into  magare.gmz:/home/kgeorge/mysql/autopush/B29070-5.0-opt

The Ctrl-C handler in mysql closes the console while ReadConsole()
waits for console input.
But the main thread was detecting that ReadConsole() haven't read 
anything and was processing as if there're data in the buffer.
Fixed to handle correctly this error condition.
No test case added as the test relies on Ctrl-C sent to the client
from its console.

into  magare.gmz:/home/kgeorge/mysql/autopush/B29070-5.0-opt

1. Threat MBR for a key as double[] and convert it only
when about to store it on disk.
2. Remove the redundant function get_double().

into  moonbone.local:/mnt/gentoo64/work/29461-bug-5.0-opt-mysql

with the space character.

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.

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

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug29417

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

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

An assertion abort could occur for some grouping queries that employed 
decimal user variables with assignments to them.

The problem appeared the constructors of the class Field_new_decimal
because the function my_decimal_length_to_precision did not guarantee
returning decimal precision not greater than DECIMAL_MAX_PRECISION.

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

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

The cast operation ignored the cases when the precision and/or the scale exceeded
the limits, 65 and 30 respectively. No errors were reported in these cases.
For some queries this may lead to an assertion abort.

Fixed by throwing errors for such cases.

For GCov builds, if the server crashes, the normal exit handler for writing
coverage information is not executed due to the abnormal termination.

Fix this by explicitly calling the __gcov_flush function in our crash handler.

into  ppcg5.local:/private/Network/Servers/anubis.xiphis.org/home/antony/work/mysql-5.0-engines.merge

Merge ppcg5.local:/private/Network/Servers/anubis.xiphis.org/home/antony/work/mysql-4.1-engines.merge
into  ppcg5.local:/private/Network/Servers/anubis.xiphis.org/home/antony/work/mysql-5.0-engines.merge

into  anubis.xiphis.org:/usr/home/antony/work/mysql-5.0-engines.merge

into  anubis.xiphis.org:/usr/home/antony/work/mysql-4.1-engines.merge

into  labbari.dsl.inet.fi:/home/my/bk/mysql-5.0-marvel

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

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.

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).

into  mysql.com:/home/svoj/devel/mysql/BUG27564/mysql-5.0-engines

Dropping an user defined function may cause server crash in
case this function is still in use by another thread.

The problem was that our hash implementation didn't update
hash link list properly when hash_update() was called.

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.

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

if item_func->argument_count()==0

  Updated test case for bug #29294.

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

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

  Test case update for bug #29294.

  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.