There was no way to return an error from the client library
if no MYSQL connections was established.
So here i added variables to store that king of errors and
made functions like mysql_error(NULL) to return these.


client/mysql.cc:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  Show the error message on std_error
include/sql_common.h:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  cant_connect_sqlstate constant declared
libmysql/libmysql.c:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  mysql_sqlstate(NULL) returns 'unknown_sqlstate'
libmysqld/lib_sql.cc:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  EMBEDDED_SERVER version of the vprint_msg_to_log() implemented
sql-common/client.c:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  mysql_server_last_errno and mysql_server_last_error introduced
  to store errors not related to particular connections.
  
  mysql_error(NULL) and mysql_errno(NULL) now returns these
  mysql_server_last_error and errno respectively
sql/log.cc:
  Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
  
  EMBEDDED_LIBRARY implementation of the vprint_msg_to_log() moved
  to lib_sql.cc

                    on table creates

The problem was in incompatible syntax for key definition in CREATE
TABLE.

5.0 supports only the following syntax for key definition (see "CREATE
TABLE syntax" in the manual):

{INDEX|KEY} [index_name] [index_type] (index_col_name,...)

While 5.1 parser supports the above syntax, the "preferred" syntax was
changed to:

{INDEX|KEY} [index_name] (index_col_name,...) [index_type]

The above syntax is used in 5.1 for the SHOW CREATE TABLE output, which
led to dumps generated by 5.1 being incompatible with 5.0.

Fixed by changing the parser in 5.0 to support both 5.0 and 5.1 syntax
for key definition.


mysql-test/r/create.result:
  Added a test case for bug #25162.
mysql-test/t/create.test:
  Added a test case for bug #25162.
sql/sql_yacc.yy:
  Changed the parser to support both 5.0 and 5.1 syntax for index type
  specification in CREATE TABLE.

of cleanups in the test case for bug33794.

into  lamia.dupka:/home/mhansson/my50-bug33143-again-pushee

The problem occurred when one had a subquery that had an equality X=Y where 
Y referred to a named select list expression from the parent select. MySQL 
crashed when trying to use the X=Y equality for ref-based access. 

Fixed by allowing non-Item_field items in the described case.


mysql-test/r/subselect.result:
  BUG#33794 "MySQL crashes executing specific query"
  - Testcase
mysql-test/t/subselect.test:
  BUG#33794 "MySQL crashes executing specific query"
  - Testcase
sql/sql_select.cc:
  BUG#33794 "MySQL crashes executing specific query"
  get_store_key() assumed that if it got a reference
    t.key=Item_outer_ref(Item_direct_ref(x)) 
  then x was an Item_field object, which is not the case when one refers to a
  named select list expression out ot subquery.

into  linux-st28.site:/home/martin/mysql/src/bug33143/my50-bug33143-again-pushee


sql/item_func.cc:
  Auto merged
mysql-test/r/type_decimal.result:
  Bug#33143: Manual merge
mysql-test/t/type_decimal.test:
  Bug#33143: Manual merge

The ROUND(X, D) function would change the Item::decimals field during
execution to achieve the effect of a dynamic number of decimal digits.
This caused a series of bugs:
Bug #30617:Round() function not working under some circumstances in InnoDB
Bug #33402:ROUND with decimal and non-constant cannot round to 0 decimal places
Bug #30889:filesort and order by with float/numeric crashes server
Fixed by never changing the number of shown digits for DECIMAL when
used with a nonconstant number of decimal digits.


mysql-test/r/type_decimal.result:
  Bug#33143: Test result
mysql-test/t/type_decimal.test:
  Bug#33143: Test case
sql/item_func.cc:
  Bug#33143: 
  - Moved the DECIMAL_MAX_SCALE limitation to fix_length_and_dec.
  - Removed resetting of Item::decimals field.
  - set the frac field of the output value to current scale.
strings/decimal.c:
  Bug#33143: It is necessary to set all digits in the buffer following the 
  rounded one to zero, as they may now be displayed.

into  lamia.dupka:/home/mhansson/my50-bug31797-pushee

into  linux-st28.site:/home/martin/mysql/src/bug31797/my50-bug31797-pushee


sql/item.cc:
  Auto merged
mysql-test/r/group_by.result:
  Bug#31797: Manual merge
mysql-test/t/group_by.test:
  Bug#31797: Manual merge

The name resolution for correlated subqueries and HAVING clauses
failed to distinguish which of two was being performed when there 
was a reference to an outer aliased field.
Fixed by adding the condition that HAVING clause name resulotion
is being performed.


mysql-test/r/group_by.result:
  Bug#31797: Test result
mysql-test/t/group_by.test:
  Bug#31797: Test case
sql/item.cc:
  Bug#31797: 
  Corrected function comment.
  The fix, raising the error is restricted to HAVING name resolution.

value when inserting into a view.

The mysql_prepare_insert function checks all fields of the target table that
directly or indirectly (through a view) are specified in the INSERT
statement to have a default value. This check can be skipped if the INSERT
statement doesn't mention any insert fields. In case of a view this allows
fields that aren't mentioned in the view to bypass the check.

Now fields of the target table are always checked to have a default value
when insert goes into a view.


mysql-test/t/view.test:
  Added a test case for the bug#29477: Not all fields of the target table were 
  checked to have a default value when inserting into a view.
mysql-test/r/view.result:
  Added a test case for the bug#29477: Not all fields of the target table were 
  checked to have a default value when inserting into a view.
sql/sql_insert.cc:
  Bug#29477: Not all fields of the target table were checked to have a default
  value when inserting into a view.
  Now fields of the target table are always checked to have a default value
  when insert goes into a view.

into  kaamos.(none):/data/src/opt/mysql-5.0-opt


client/mysql.cc:
  Auto merged

into  moonbone.local:/work/33675-bug-5.0-opt-mysql

  Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
  server crash.
  Free smaller buffer before allocating bigger one.


sql/filesort.cc:
  Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
  server crash.
  Free smaller buffer before allocating bigger one.

into  kaamos.(none):/data/src/opt/mysql-5.0-opt


sql/set_var.cc:
  Auto merged

into  kaamos.(none):/data/src/opt/mysql-5.0-opt

into  moonbone.local:/work/33675-bug-5.0-opt-mysql

into  magare.gmz:/home/kgeorge/mysql/autopush/B33133-5.0-opt


sql/sql_base.cc:
  Auto merged

When resolving references we need to take into consideration
the view "fields" and allow qualified access to them.
Fixed by extending the reference resolution to process view
fields correctly.


mysql-test/r/func_group.result:
  Bug #33133: test case
mysql-test/t/func_group.test:
  Bug #33133: test case
sql/sql_base.cc:
  Bug #33133: allow qualified alias refs to view fields

server crash.

The filesort implementation has an optimization for subquery execution which
consists of reusing previously allocated buffers. In particular the call to
the read_buffpek_from_file function might be skipped when a big enough buffer
for buffer descriptors (buffpeks) is already allocated. Beside allocating
memory for buffpeks this function fills allocated buffer with data read from
disk. Skipping it might led to using an arbitrary memory as fields' data and
finally to a crash.

Now the read_buffpek_from_file function is always called. It allocates
new buffer only when necessary, but always fill it with correct data.


sql/filesort.cc:
  Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
  server crash.Now the read_buffpek_from_file function is always called. It allocates
  new buffer only when necessary, but always fill it with correct data.
mysql-test/r/subselect.result:
  Added a test case for the bug#33675: Usage of an uninitialized memory by
  filesort in a subquery caused server crash.
mysql-test/t/subselect.test:
  Added a test case for the bug#33675: Usage of an uninitialized memory by
  filesort in a subquery caused server crash.

into  magare.gmz:/home/kgeorge/mysql/autopush/B33256-5.0-opt


sql/field.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged

                    to be compiled in

The problem was that on a statically built server an attempt to create
a UDF resulted in a different, but reasonable error ("Can't open shared
library" instead of "UDFs are unavailable with the --skip-grant-tables
option"), which caused a failure for the test case for bug #32020.

Fixed by moving the test case for bug #32020 from skip_grants.test to a
separate test to ensure that it is only run when the server is built
with support for dynamically loaded libraries.


mysql-test/r/skip_grants.result:
  Moved the test case for bug #32020 to a separate test.
mysql-test/t/skip_grants.test:
  Moved the test case for bug #32020 to a separate test.
mysql-test/r/udf_skip_grants.result:
  Moved the test case for bug #32020 to a separate test.
mysql-test/t/udf_skip_grants-master.opt:
  Moved the test case for bug #32020 to a separate test.
mysql-test/t/udf_skip_grants.test:
  Moved the test case for bug #32020 to a separate test.

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

 w/ Field_date instead of Field_newdate
  
Field_date was still used in temp table creation.
Fixed by using Field_newdate consistently throughout the server
except when reading tables defined with older MySQL version.
No test suite is possible because both Field_date and Field_newdate
return the same values in all the metadata calls. 


mysql-test/r/type_decimal.result:
  Bug #33256: removed redundant warnings
sql/field.h:
  Bug #33256: Add a constructor similar to Field_date::Field_date()
sql/item.cc:
  Bug #33256: Use Field_newdate instead of Field_date 
  for all temp tables and CREATE .. SELECT
sql/item_sum.cc:
  Bug #33256: Use Field_newdate instead of Field_date 
  for all temp tables and CREATE .. SELECT
sql/item_timefunc.cc:
  Bug #33256: Use Field_newdate instead of Field_date 
  for all temp tables and CREATE .. SELECT
sql/item_timefunc.h:
  Bug #33256: Use Field_newdate instead of Field_date 
  for all temp tables and CREATE .. SELECT

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

client/mysql.cc:
  BUG#33057, avoid calling strlen() *for every single character* in the client's input

into  mysql.com:/misc/mysql/31990/50-31990

into  linux-st28.site:/home/martin/mysql/src/bug32848/my50-bug32848


sql/sql_select.cc:
  Auto merged

Warnings elimination


sql/sql_select.cc:
  Bug#32848: Warnings elimination

into  mysql.com:/misc/mysql/31990/50-31990


mysql-test/r/cast.result:
  Auto merged
mysql-test/r/type_date.result:
  Auto merged
mysql-test/t/cast.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/field.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
mysql-test/t/type_date.test:
  manual merge

into  linux-st28.site:/home/martin/mysql/src/bug32848/my50-bug32848


sql/field.cc:
  Auto merged
sql/field.h:
  Auto merged
sql/item.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/union.result:
  Bug#32848: Manual merge
mysql-test/t/union.test:
  Bug#32848: Manual merge

into  magare.gmz:/home/kgeorge/mysql/autopush/B19390-5.0-opt

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

The checks in the test for bug #12480 were too wide and
made the test to depend on the procedures and triggers
present in the server.
Corrected the test to check only for the procedure and 
trigger it creates.


mysql-test/r/rpl_trigger.result:
  Bug #19390: corrected the test to check for its procedure only
mysql-test/t/rpl_trigger.test:
  Bug #19390: corrected the test to check for its procedure only

into  mysql.com:/misc/mysql/32770/50-32770

into  mysql.com:/misc/mysql/31752_/50-31752_


client/mysqltest.c:
  Auto merged

into  mysql.com:/misc/mysql/31752_/41-31752_

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

into  mysql.com:/misc/mysql/31752_/50-31752_


client/mysqltest.c:
  Auto merged

fix test program


client/mysqltest.c:
  fix buffer off-by-ones in test program