mysql-test/r/subselect4.result:
Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.
mysql-test/t/subselect4.test:
Moved test case for LP BUG#718593 into the correct test file subselect_mat_cost_bugs.test.
Two of them (in the function make_join_statistics and in the function
sort_and_filter_keyuse) were due to bad merges while the third bug was
triggered by uninitialized values of the field JOIN_TAB::preread_init_done.
Fixed a compiler warning in mysql_priv.h.
Commented out some queries from the funcs_1 suite returning wrong
errors due to bugs concerning updatable views (see bugs 784297 and
784303).
Adjusted some results for the test cases with derived tables from
different suites.
Fields belonging to views in general cannot be substituted for
equal items, in particular for constants, because all references
to a view field refer to the same Item_field object while they
could be used in different OR parts of the where condition and
belong to different equivalence classes (to different Item_equals).
That's why substitution for equal items in any context is allowed
only in place of Item_direct_view_ref objects, but not in place of
Item_fields these objects refer to.
Due to some erroneous code in the patch for bug 717577 substitution
for view fields were allowed in some context.This could lead
to wrong results returned by queries using views.
The fix prohibits substitution of view fields for equal items
in any context.
The patch also changes slightly the compile method for the Item_func
class. Now if the analyze method returns NULL in his parameter the
compile method is not called for the arguments of the function
at all. A similar change was made for the Item_ref class.
- in advance_sj_state(), remember join->cur_dups_producing_tables in
pos->prefix_dups_producing_tables *before* we modify it, so that
restore_prev_sj_state() restores cur_dups_producing_tables in all cases.
- Updated test results in subselect_sj2[_jcl6].result (the original EXPLAIN
was invalid there)
sql/event_parse_data.cc:
don't use "not_used" variable
sql/item_timefunc.cc:
Item_temporal_func::fix_length_and_dec()
and other changes
sql/item_timefunc.h:
introducing Item_timefunc::fix_length_and_dec()
sql/share/errmsg.txt:
don't say "column X" in the error message that used not only for columns
include/my_time.h:
remove duplicate defines.
cast to ulonglong to avoid overflow
sql/field.cc:
perform sign extension when reading packed TIME values
sql/item_cmpfunc.cc:
when converting a string to a date for the purpose of comparing it with another date,
we should ignore strict sql mode.
sql/item_timefunc.cc:
better error message
sql/item_timefunc.h:
limit decimals appropriately
sql/share/errmsg.txt:
don't refer to an object as a "column" in error messages that are used not only for columns.
client/mysqltest.cc:
Column names.
mysql-test/r/grant_cache_no_prot.result:
fix of text.
mysql-test/r/grant_cache_ps_prot.result:
Fix of test.
mysql-test/r/query_cache.result:
Switching on and off query cache.
mysql-test/t/query_cache.test:
Switching on and off query cache.
mysys/charset.c:
Fix of parser.
sql/handler.cc:
thd added to parameters.
sql/log_event.cc:
thd added to parameters.
sql/log_event_old.cc:
thd added to parameters.
sql/mysql_priv.h:
Fixed functions definitions.
sql/mysqld.cc:
Comments stripping.
sql/set_var.cc:
Switching on and off query cache.
sql/set_var.h:
Switching on and off query cache.
sql/share/errmsg.txt:
New errors.
sql/sql_cache.cc:
Switching query cache on and off, removing comments.
sql/sql_cache.h:
thd added to parameters.
sql/sql_class.h:
Comments stripping.
sql/sql_db.cc:
thd added to parameters.
sql/sql_lex.cc:
lex fixed.
sql/sql_parse.cc:
thd added to parameters.
When a view is merged into a select all the depended_from fields
pointing to the select of the view should have been corrected to
point to the select where the view is used. It was not done yet.
This could lead to wrong results returned by queries such as
one from the test case for bug 33389.
Correction of outer references required walking through all items
of the proccesed qurery. To avoid this the following solution was
implemented.
Each select now contains a pointer to the select it is merged into
(if there is any). Such pointers allow to get the corrected value
of depended_from on the fly. The function Item_ident::get_depended_from
was introduced for this purpose.
Resolved all conflicts, bad merges and fixed a few minor bugs in the code.
Commented out the queries from multi_update, view, subselect_sj, func_str,
derived_view, view_grant that failed either with crashes in ps-protocol or
with wrong results.
The failures are clear indications of some bugs in the code and these bugs
are to be fixed.
Analysis:
The subquery is evaluated first during ref-optimization of the outer
query because the subquery is considered constant from the perspective
of the outer query. Thus an attempt is made to evaluate the MAX subquery
and use the new constant to drive an index nested loops join.
During this evaluation the inner-most subquery replaces the JOIN_TAB
with a new one that fetches the data from a temp table.
The function select_describe crashes at the lines:
TABLE_LIST *real_table= table->pos_in_table_list;
item_list.push_back(new Item_string(real_table->alias,
strlen(real_table->alias),
cs));
because 'table' is a temp table, and it has no corresponding table
reference. This 'real_table' is NULL, and real_table->alias results
in a crash.
Solution:
In the spirit of MWL#89 prevent the evaluation of expensive predicates
during optimization. This patch prevents the evaluation of expensive
predicates during ref optimization.
sql/item_subselect.h:
Remove unused class member. Not needed for the fix, but noticed now and removed.
Analysis:
During optimization of the subquery, in the call chain:
update_ref_and_keys -> add_key_fields ->
merge_key_fields -> Item_direct_ref::is_null -> Item_cache::is_null
The call to Item_cache::is_null() returns TRUE, which is wrong.
This results in Item_null replacing the field 'f3' in the KEY_FIELD,
then this Item_null is used for index access, producing a wrong result.
The reason why Item_cache::is_null returns wrong result is that
this Item_cache object is a cache of the left operand of IN, and was
updated in Item_in_optimizer::val_int. In MWL#89 the latter method is
called during the execution phase, which is after we optimize the subquery.
Therefore during the optization phase the left operand cache of IN was
not updated.
Solution:
Update the left operand cache during optimization if it is a constant.
This bug fix also discoveres and fixes a wrong IF statement in
convert_constant_item().
Store decimal 0.0 in zero bytes in dynamic strings.
mysqltest: Don't ignore error from mysql_stmt_fetch; This could cause rows to be missing from log when running with --ps-protocol
Fixed wrong result length for CAST(... as TIME)
client/mysqltest.cc:
Don't ignore error from mysql_stmt_fetch; This could cause rows to be missing from log when running with --ps-protocol
libmysql/libmysql.c:
The max length for a TIME column is 17, not 15.
mysql-test/r/dyncol.result:
More tests
mysql-test/t/dyncol.test:
More tests
mysys/ma_dyncol.c:
Check content of decimal value on read and store to not get assert in decimal_bin_size().
Store decimal 0.0 in zero bytes in dynamic strings. This also solves a problem where decimal 0 had different internal representations.
sql-common/my_time.c:
Fixed DBUG_PRINT
sql/item_timefunc.h:
Fixed wrong result length for CAST(... as TIME). This was the cause of failures in buildbot when doing cast(... as time);
sql/protocol.cc:
More DBUG_PRINT
mysql-test/r/create.result:
test of renaming
mysql-test/r/upgrade.result:
Now such behaviour prohibited to avoid problems.
mysql-test/t/create.test:
test of renaming
mysql-test/t/upgrade.test:
Now such behaviour prohibited to avoid problems.
sql/mysql_priv.h:
Function to test table name presence added.
sql/sql_rename.cc:
Rename fixed.
sql/sql_table.cc:
Function to test table name presence added.
Create fixed.
mysql-test/r/dyncol.result:
Updated test results
mysql-test/r/index_intersect.result:
Updated results
mysql-test/r/index_intersect_innodb.result:
Updated results
mysql-test/t/dyncol.test:
Added replace_result for floating point results that are different on windows
Added round() around a result to get same result on all platforms.
mysql-test/t/index_intersect.test:
Added replace_result to fix that index_merge may put key names in different order.
mysys/ma_dyncol.c:
Fixed compiler warnings on Solaris
sql/key.cc:
Fixed compiler warnings on Solaris
sql/mysqld.cc:
Fixed compiler warning on windows
support-files/compiler_warnings.supp:
Suppressed an unintersting warning on Solaris
Bugs fixed:
- Added automatic detection of unsigned arguments to COLUMN_CREATE()
- If string length is not know for COLUMN_GET() use MAX_DYNAMIC_COLUMN_LENGTH instead of MAX_FIELD_BLOBLENGTH
- null_value flag was not propery reset for COLUMN_LIST() and COLUMN_CREATE() which could lead to crashes later:
- lp:778905 Assertion `value->year <= 9999' failed in dynamic_column_date_store
- lp:778912 Assertion `field_pos < field_count' failed in Protocol_text::store in maria-5.3-mwl34
include/ma_dyncol.h:
Added define for max dynamic column length.
mysql-test/r/cast.result:
Added test of cast big unsigned int to signed (this test case was missing)
mysql-test/r/dyncol.result:
Added tests from reported bugs
Added testing of automatic store of signed/unsigned integers
mysql-test/t/cast.test:
Added test of cast big unsigned int to signed (this test case was missing)
mysql-test/t/dyncol.test:
Added tests from reported bugs
Added testing of automatic store of signed/unsigned integers
sql/item.cc:
Added assert to catch cases where null_value is not set properly
sql/item_strfunc.cc:
Added automatic detection of unsigned arguments to COLUMN_CREATE()
COLUMN_GET() returned wrong value for illegal strings which lead to assert later
null_value flag was not propery reset for COLUMN_LIST() and COLUMN_CREATE() which could lead to crashes later.
sql/item_strfunc.h:
If string length is not know for COLUMN_GET() use MAX_DYNAMIC_COLUMN_LENGTH
- In eliminate_item_equal(), we could end up in a situation where:
= The multiple equality has a constant C1 (and so it is the "head item")
= The join order was such that we've generated "sj_inner_table1=C1" equality,
and now are looking to generate "sj_inner_table2_=..." equality.
When looking for what should be the other member of equality, we run
Item *head_item= current_sjm? current_sjm_head: head;
which sees current_sjm!=NULL, and takes current_sjm_head (which is NULL because
the constant C1 is the head for all cases).
- Fixed in a trivial way: take current_sjm_head if we don't have constant.
- Handle the case of degenerate joins. When join has impossible WHERE clause,
a number of its members, including JOIN::map2table, are not initialized.
Do not try accessing them, detect degenerate joins early.
- COLUMN_CREATE(column_nr, value, [column_nr,value]...)
- COLUMN_ADD(blob,column_nr, value, column_nr,value]...)
- COLUMN_DELETE(blob, column_nr, column_nr...)
- COLUMN_EXISTS(blob, column_nr)
- COLUMN_LIST(blob, column_nr)
- COLUMN_GET(string, column_nr AS type)
Added cast(X as DOUBLE) and cast(x as INT)
Better warning and error messages for wrong cast's
Created some sub functions to simplify and reuse code.
Added a lot of conversation functions with error/warnings for what went wrong.
Fixed some issues when casting time to datetime.
Added functions to dynamic strings and Strings to allow one to move a string buffer from dynamic strings to String (to save malloc+ copy)
Added dynamic columns library to libmysqlclient
include/Makefile.am:
Added ma_dyncol.h
include/decimal.h:
Added 'const' to arguments for some functions.
include/my_sys.h:
Added dynstr_reassociate()
include/my_time.h:
Added TIME_SUBSECOND_RANGE
Added double_to_datetime()
Added flag argument to str_to_time()
libmysql/CMakeLists.txt:
Added mysys/ma_dyncol.c
libmysql/Makefile.shared:
Added ma_dyncol
libmysql/libmysql.c:
Added argument to str_to_time()
mysql-test/r/bigint.result:
Better error messages
mysql-test/r/cast.result:
Better warning and error messages
A lot of new cast() tests
mysql-test/r/func_math.result:
Better warning messages
mysql-test/r/func_str.result:
Better warning messages
mysql-test/r/func_time.result:
Better warning messages
mysql-test/r/sp-vars.result:
Better warning messages
mysql-test/r/strict.result:
Better warning messages
New test result
mysql-test/r/type_newdecimal.result:
Better warning messages
mysql-test/r/warnings.result:
Better warning messages
mysql-test/suite/funcs_1/r/innodb_func_view.result:
Updated results after better cast warnings
mysql-test/suite/funcs_1/r/memory_func_view.result:
Updated results after better cast warnings
mysql-test/suite/funcs_1/r/myisam_func_view.result:
Updated results after better cast warnings
mysql-test/suite/optimizer_unfixed_bugs/t/bug43448.test:
Added begin...commit to speed up test.
mysql-test/suite/parts/inc/part_supported_sql_funcs_delete.inc:
Added begin...commit to speed up test.
mysql-test/suite/parts/inc/partition_supported_sql_funcs.inc:
Added begin...commit to speed up test.
mysql-test/suite/parts/r/part_supported_sql_func_innodb.result:
Added begin...commit to speed up test.
mysql-test/suite/parts/r/part_supported_sql_func_myisam.result:
Added begin...commit to speed up test.
mysql-test/suite/parts/r/rpl_partition.result:
Added begin...commit to speed up test.
mysql-test/suite/parts/t/part_supported_sql_func_innodb.test:
Removed duplicated --big_test
mysql-test/suite/parts/t/rpl_partition.test:
Added begin...commit to speed up test.
mysql-test/suite/pbxt/r/cast.result:
Updated results after better cast warnings
mysql-test/suite/pbxt/r/func_str.result:
Updated results after better cast warnings
mysql-test/suite/pbxt/r/type_newdecimal.result:
Updated results after better cast warnings
mysql-test/suite/rpl/r/rpl_innodb_bug28430.result:
Added begin...commit to speed up test.
mysql-test/suite/rpl/t/rpl_innodb_bug28430.test:
Added begin...commit to speed up test.
mysql-test/suite/vcol/r/vcol_supported_sql_funcs_innodb.result:
More warnings
mysql-test/suite/vcol/r/vcol_supported_sql_funcs_myisam.result:
More warnings
mysql-test/t/cast.test:
A lot of new cast() tests
mysql-test/t/strict.test:
Added new test
mysys/CMakeLists.txt:
Added ma_dyncol.c
mysys/Makefile.am:
Added ma_dyncol.c
mysys/string.c:
Added dynstr_reassociate() to move a buffer from dynamic_strings to some other allocator
sql-common/my_time.c:
Added 'fuzzydate' flag to str_to_time()
Added support for microseconds to my_time_to_str() and my_datetime_to_str()
Reset second_parts in number_to_datetime()
Added double_to_datetime()
sql/field.cc:
Added double_to_longlong() and truncate_double() to simplify and reuse code
sql/field.h:
New prototypes
sql/item.cc:
Changed Item::get_date(MYSQL_TIME *ltime,uint fuzzydate) to be aware of type of argument.
(Needed to make it microsecond safe and get better warnings).
Updated call to str_to_time_with_warn()
sql/item.h:
Added struct st_dyncall_create_def used by dynamic columns
Added virtual bool dynamic_result() to tell if type of argument may change over calls.
sql/item_cmpfunc.cc:
Added Item_func_dyncol_exists()
sql/item_cmpfunc.h:
Added class Item_func_dyncol_exists
sql/item_create.cc:
Added get_length_and_scale() to simplify other functions
Simplified and extended create_func_cast()
Added support for cast(X as double(X,Y))
Added functions to create dynamic column functions.
sql/item_create.h:
Added prototypes
sql/item_func.cc:
Extended cast functions Item_func_signed() and Item_func_unsigned() to work with dynamic types
Added Item_double_typecast()
sql/item_func.h:
Added class Item_double_typecast()
sql/item_strfunc.cc:
Added functions for COLUMN_CREATE(), COLUMN_ADD(), COLUMN_GET() and COLUMN_LIST()
sql/item_strfunc.h:
Added classes for COLUMN_CREATE(), COLUMN_ADD(), COLUMN_GET() and COLUMN_LIST()
sql/item_timefunc.cc:
Added flag argument to str_to_time_with_warn()
Updated Item_char_typecast() to handle result type that may change between calls (for dynamic columns)
Added Item_time_typecast::get_date() to ensure that we cast a datetime to time properly.
sql/item_timefunc.h:
Added get_date() to Item_time_typecast() to allow proper results for casting time to datetime
sql/lex.h:
Added new SQL function names
sql/my_decimal.cc:
Added 'const' to some arguments.
Better error message in case of errors (we now print out the wrong value)
Added my_decimal2int()
sql/my_decimal.h:
Moved some constants to my_decimal_limits.h
Updated prototypes.
Made my_decimal2int() a function as it's rather long (no reason to have it inline)
Added decimal2my_decimal() function.
sql/mysql_priv.h:
Prototypes for new functions
sql/share/errmsg.txt:
New error messages for wrong casts and dynamic columns
sql/sql_acl.cc:
Fixed indentation
sql/sql_base.cc:
Added dynamic_column_error_message()
sql/sql_string.h:
Added reassociate() to move a buffer to be owned by String object.
sql/sql_yacc.yy:
Added syntax for COLUMN_ functions.
sql/time.cc:
Updated str_to_datetime_with_warn() flag argument to same type as other functions
Added conversion flag to str_to_time_with_warn() (Similar to all datetime functions)
Added conversion functions with warnings: double_to_datetime_with_warn() and decimal_to_datetime_with_warn()
strings/decimal.c:
Added 'const' to arguments for some functions.
unittest/mysys/Makefile.am:
Added test for dynamic columns code
Analysis:
The method st_select_lex::optimize_unflattened_subqueries()
incorrectly propagated to each subquery the complete
select_options flag set for the whole query. Among other
flags in select_options, this propagated incorrectly the
STRAIGHT_JOIN flag from the upper query to the subquery.
Solution:
During EXPLAIN set only the SELECT_DESCRIBE bit in the
select_options of the subquery.
