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

The problem is that a SELECT on one thread is blocked by INSERT ... ON
DUPLICATE KEY UPDATE on another thread even when low_priority_updates is
activated.

The solution is to possibly downgrade the lock type to the setting of
low_priority_updates if the INSERT cannot be concurrent.

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-28779-b

Use double quotes instead of single ones which make the test fail on Windows. This is for bug #30164.

  
Problem:
  
In cases when a client-side macro appears inside a server-side comment, the add_line() function in mysql.cc discarded all characters until the next delimiter to remove macro arguments from the query string. This resulted in broken queries being sent to the server when the next delimiter character appeared past the comment's boundaries, because the comment closing sequence ('*/') was discarded.
  
Fix:
  
If a client-side macro appears inside a server-side comment, discard all characters in the comment after the macro (that is, until the end of the comment rather than the next delimiter).
This is a minimal fix to allow only simple cases used by the mysqlbinlog utility. Limitations that are worth documenting:
  
- Nested server-side and/or client-side comments are not supported by mysql.cc
- Using client-side macros in multi-line server-side comments is not supported
- All characters after a client-side macro in a server-side comment will be omitted from the query string (and thus, will not be sent to server).

comments)

Before this fix, the server would accept queries that contained comments,
even when the comments were not properly closed with a '*' '/' marker.

For example,
  select 1 /* + 2 <EOF>
would be accepted as
  select 1 /* + 2 */ <EOF>
and executed as
  select 1

With this fix, the server now rejects queries with unclosed comments
as syntax errors.
Both regular comments ('/' '*') and special comments ('/' '*' '!') must be
closed with '*' '/' to be parsed correctly.

seems to be converted as varbinary.

The bug has been already fixed. This CS just adds a test case for it.

into  moksha.local:/Users/davi/mysql/push/mysql-5.0-runtime

This is a performance bug, affecting in particular the bison generated code
for the parser.

Prior to this fix, the grammar used a long chain of reduces to parse an
expression, like:
  bit_expr -> bit_term
  bit_term -> bit_factor
  bit_factor -> value_expr
  value_expr -> term
  term -> factor
etc

This chain of reduces cause the internal state automaton in the generated
parser to execute more state transitions and more reduces, so that the
generated MySQLParse() function would spend a lot of time looping to execute
all the grammar reductions.

With this patch, the grammar has been reorganized so that rules are more
"flat", limiting the depth of reduces needed to parse <expr>.

Tests have been written to enforce that relative priorities and properties
of operators have not changed while changing the grammar.

See the bug report for performance data.

If, after the tables are locked, one of the conditions to read from a
HANDLER table is not met, the handler code wrongly jumps to a error path
that won't unlock the tables.

The user-visible effect is that after a error in a handler read command,
all subsequent handler operations on the same table will hang.

The fix is simply to correct the code to jump to the (same) error path that
unlocks the tables.

The problem from a user's perspective: user creates table A, and then tries
to CREATE TABLE a SELECT from A - and this causes a deadlock error, a hang,
or fails with a debug assert, but only if the storage engine is InnoDB.

The origin of the problem: InnoDB uses case-insensitive collation
(system_charset_info) when looking up the internal table share, thus returning
the same share for 'a' and 'A'.

Cause of the user-visible behavior: since the same share is returned to SQL
locking subsystem, it assumes that the same table is first locked (within the
same session) for WRITE, and then for READ, and returns a deadlock error.
However, the code is wrong in not properly cleaning up upon an error, leaving
external locks in place, which leads to assertion failures and hangs.

Fix that has been implemented: the SQL layer should properly propagate the
deadlock error, cleaning up and freeing all resources.

Further work towards a more complete solution: InnoDB should not use case
insensitive collation for table share hash if table names on disk honor the case.

into  mysql.com:/data0/mysqldev/my/build-200708231546-5.0.48/mysql-5.0-release

into  a88-113-38-195.elisa-laajakaista.fi:/home/my/bk/mysql-5.0-marvel

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

1) Ensure "init_db.sql" and "test_db-sql" really get built.

2) Ensure the "*.def" files with NetWare linker options get distributed to the proper directories.

into  mysql.com:/data0/mysqldev/my/build-200708231546-5.0.48/mysql-5.0-release

into  a88-113-38-195.elisa-laajakaista.fi:/home/my/bk/mysql-5.0-marvel

into  mysql.com:/data0/mysqldev/my/build-200708231546-5.0.48/mysql-5.0-release

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

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

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

into  bk-internal.mysql.com:/users/gshchepa/mysql-5.0-opt

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

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0.48

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0.48

since this flag was explicitly removed in pushbuild for GCOV builds.

 BUILD_CMD => ['sh', '-c', 'perl -i.bak -pe "s/ \\\\\$static_link//" ' .
              'BUILD/compile-pentium-gcov; BUILD/compile-pentium-gcov'],

Moving $static_link to SETUP.sh broke this, and is now fixed.

Should this flag be needed on some platforms,
the proper location is compile-<platform>-gcov

Tested the amd64 and pentium64 build fine without it, and can run NDB tests.

1) We do not provide the "isam" table handler in 5.0 and up (different from "myisam" !),
   so we do not need the ".def" files for the "isam"-specific tools.

2) Use "basename" to get the base name of a file, not a harder-to-read sed expression.

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-30237

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

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-23062

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-30237

This is a performance bug, related to the parsing or 'OR' and 'AND' boolean
expressions.

Let N be the number of expressions involved in a OR (respectively AND).

When N=1

For example, "select 1" involve only 1 term: there is no OR operator.

In 4.0 and 4.1, parsing expressions not involving OR had no overhead.
In 5.0, parsing adds some overhead, with Select->expr_list.

With this patch, the overhead introduced in 5.0 has been removed,
so that performances for N=1 should be identical to the 4.0 performances,
which are optimal (there is no code executed at all)

The overhead in 5.0 was in fact affecting significantly some operations.
For example, loading 1 Million rows into a table with INSERTs,
for a table that has 100 columns, leads to parsing 100 Millions of
expressions, which means that the overhead related to Select->expr_list
is executed 100 Million times ...

Considering that N=1 is by far the most probable expression,
this case should be optimal.

When N=2

For example, "select a OR b" involves 2 terms in the OR operator.

In 4.0 and 4.1, parsing expressions involving 2 terms created 1 Item_cond_or
node, which is the expected result.
In 5.0, parsing these expression also produced 1 node, but with some extra
overhead related to Select->expr_list : creating 1 list in Select->expr_list
and another in Item_cond::list is inefficient.

With this patch, the overhead introduced in 5.0 has been removed
so that performances for N=2 should be identical to the 4.0 performances.
Note that the memory allocation uses the new (thd->mem_root) syntax
directly.
The cost of "is_cond_or" is estimated to be neglectable: the real problem
of the performance degradation comes from unneeded memory allocations.

When N>=3

For example, "select a OR b OR c ...", which involves 3 or more terms.

In 4.0 and 4.1, the parser had no significant cost overhead, but produced
an Item tree which is difficult to evaluate / optimize during runtime.
In 5.0, the parser produces a better Item tree, using the Item_cond
constructor that accepts a list of children directly, but at an extra cost
related to Select->expr_list.

With this patch, the code is implemented to take the best of the two
implementations:
- there is no overhead with Select->expr_list
- the Item tree generated is optimized and flattened.

This is achieved by adding children nodes into the Item tree directly,
with Item_cond::add(), which avoids the need for temporary lists and memory
allocation

Note that this patch also provide an extra optimization, that the previous
code in 5.0 did not provide: expressions are flattened in the Item tree,
based on what the expression already parsed is, and not based on the order
in which rules are reduced.

For example : "(a OR b) OR c", "a OR (b OR c)" would both be represented
with 2 Item_cond_or nodes before this patch, and with 1 node only with this
patch. The logic used is based on the mathematical properties of the OR
operator (it's associative), and produces a simpler tree.

into  hynda.mysql.fi:/home/my/mysql-5.0-marvel

Killing a SELECT query with KILL QUERY or KILL CONNECTION
causes a server crash if the query cache is enabled.

Normal evaluation of a query may be interrupted by the
KILL QUERY/CONNECTION statement, in this case the mysql_execute_command
function returns TRUE, and the thd->killed flag has true value.
In this case the result of the query may
be cached incompletely (omitting call to query_cache_insert inside
the net_real_write function), and next call to query_cache_end_of_result
may lead to server crash.
Thus, the query_cache_end_of_result function has been modified to abort
query cache in the case of killed thread.

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

into  hynda.mysql.fi:/home/my/mysql-5.0-marvel

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

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