account predicates that become sargable after reading const tables.
In some cases this resulted in choosing non-optimal execution plans.
Now info of such potentially saragable predicates is saved in
an array and after reading const tables we check whether this
predicates has become saragable.
result
The IN function aggregates result types of all expressions. It uses that
type in comparison of left expression and expressions in right part.
This approach works in most cases. But let's consider the case when the
right part contains both strings and integers. In that case this approach may
cause wrong results because all strings which do not start with a digit are
evaluated as 0.
CASE uses the same approach when a CASE expression is given thus it's also
affected.
The idea behind this fix is to make IN function to compare expressions with
different result types differently. For example a string in the left
part will be compared as string with strings specified in right part and
will be converted to real for comparison to int or real items in the right
part.
A new function called collect_cmp_types() is added. It collects different
result types for comparison of first item in the provided list with each
other item in the list.
The Item_func_in class now can refer up to 5 cmp_item objects: 1 for each
result type for comparison purposes. cmp_item objects are allocated according
to found result types. The comparison of the left expression with any
right part expression is now based only on result types of these expressions.
The Item_func_case class is modified in the similar way when a CASE
expression is specified. Now it can allocate up to 5 cmp_item objects
to compare CASE expression with WHEN expressions of different types.
The comparison of the CASE expression with any WHEN expression now based only
on result types of these expressions.
sql/item.cc:
Cleaned up an outdated comment.
sql/item_cmpfunc.cc:
Fixed bug #18360: Type aggregation for IN and CASE may lead to a wrong result
A new function called collect_cmp_types() is added. It collects different
result types for comparison of first item in the provided list with each
other item in the list.
The Item_func_in class now can refer up to 5 cmp_item objects: 1 for each
result type for comparison purposes. cmp_item objects are allocated according
to found result types. The comparison of the left expression with any
right part expression is now based only on result types of these expressions.
The Item_func_case class is modified in the similar way when a CASE
expression is specified. Now it can allocate up to 5 cmp_item objects
to compare CASE expression with WHEN expressions of different types.
The comparison of the CASE expression with any WHEN expression now based only
on result types of these expressions.
sql/item_cmpfunc.h:
Fixed bug#18360: Type aggregation for IN and CASE may lead to a wrong result
The Item_func_in class now can refer up to 5 cmp_item objects.
The Item_func_case class is modified in the similar way.
sql/opt_range.cc:
Fixed bug #18360: Type aggregation for IN and CASE may lead to a wrong
resultSmall code changes due to changes in Item_func_in class.
mysql-test/t/view.test:
Added a test comment
mysql-test/t/func_in.test:
Added a test case for bug#18360: Type aggregation for IN and CASE may lead to a wrong
result
mysql-test/r/func_in.result:
Added a test case for bug#18360: Type aggregation for IN and CASE may lead to a wrong
result
result
The IN function aggregates result types of all expressions. It uses that
type in comparison of left expression and expressions in right part.
This approach works in most cases. But let's consider the case when the
right part contains both strings and integers. In that case this approach may
cause wrong results because all strings which do not start with a digit are
evaluated as 0.
CASE uses the same approach when a CASE expression is given thus it's also
affected.
The idea behind this fix is to make IN function to compare expressions with
different result types differently. For example a string in the left
part will be compared as string with strings specified in right part and
will be converted to real for comparison to int or real items in the right
part.
A new function called collect_cmp_types() is added. It collects different
result types for comparison of first item in the provided list with each
other item in the list.
The Item_func_in class now can refer up to 5 cmp_item objects: 1 for each
result type for comparison purposes. cmp_item objects are allocated according
to found result types. The comparison of the left expression with any
right part expression is now based only on result types of these expressions.
The Item_func_case class is modified in the similar way when a CASE
expression is specified. Now it can allocate up to 5 cmp_item objects
to compare CASE expression with WHEN expressions of different types.
The comparison of the CASE expression with any WHEN expression now based only
on result types of these expressions.
into dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.1
mysql-test/r/func_gconcat.result:
Auto merged
mysql-test/r/func_group.result:
Auto merged
mysql-test/r/func_str.result:
Auto merged
mysql-test/r/func_time.result:
Auto merged
mysql-test/r/group_by.result:
Auto merged
mysql-test/r/heap_hash.result:
Auto merged
mysql-test/r/information_schema.result:
Auto merged
mysql-test/r/innodb_mysql.result:
Auto merged
mysql-test/r/join_outer.result:
Auto merged
mysql-test/r/olap.result:
Auto merged
mysql-test/r/query_cache.result:
Auto merged
mysql-test/r/range.result:
Auto merged
mysql-test/r/row.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/r/type_date.result:
Auto merged
mysql-test/r/union.result:
Auto merged
mysql-test/r/view_grant.result:
Auto merged
mysql-test/t/func_group.test:
Auto merged
mysql-test/t/func_str.test:
Auto merged
mysql-test/t/func_time.test:
Auto merged
mysql-test/t/view.test:
Auto merged
sql/item.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/log.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_range.cc:
Auto merged
sql/opt_range.h:
Auto merged
sql/opt_sum.cc:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_list.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
mysql-test/t/sp.test:
SCCS merged
sql/item_cmpfunc.cc:
SCCS merged
sql/sql_select.cc:
SCCS merged
into dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt
mysql-test/r/query_cache.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/r/type_date.result:
Auto merged
mysql-test/t/func_time.test:
Auto merged
mysql-test/t/insert_update.test:
Auto merged
sql/item.h:
Auto merged
sql/log.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
into dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt
sql/item.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/item.h:
SCCS merged
into polly.local:/tmp/20924/bug20294/my51-bug20294
mysql-test/r/case.result:
Auto merged
mysql-test/r/func_if.result:
Auto merged
mysql-test/r/func_test.result:
Auto merged
mysql-test/t/case.test:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/log_event.cc:
Auto merged
sql/sql_class.h:
Auto merged
mysql-test/r/user_var.result:
Manual merge
mysql-test/t/user_var.test:
Manual merge
sql/item_func.cc:
Manual merge
sql/item_func.h:
Manual merge
Removed changes to the Item_func_between::fix_length_and_dec() made in the fix for bug#16377
query_cache.result:
Corrected a test case after removing a fix for bug#16377
mysql-test/r/query_cache.result:
Corrected a test case after removing a fix for bug#16377
sql/item_cmpfunc.cc:
Removed changes to the Item_func_between::fix_length_and_dec() made in the fix for bug#16377
Removed changes to the Item_func_between::fix_length_and_dec() made in the fix for bug#16377
query_cache.result:
Corrected a test case after removing a fix for bug#16377
into polly.local:/tmp/20924/bug20294/my51-bug20294
mysql-test/r/case.result:
Auto merged
mysql-test/r/func_if.result:
Auto merged
mysql-test/r/func_test.result:
Auto merged
mysql-test/t/case.test:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/log_event.cc:
Auto merged
sql/sql_class.h:
Auto merged
mysql-test/r/user_var.result:
Manual merge
mysql-test/t/user_var.test:
Manual merge
sql/item_func.cc:
Manual merge
sql/item_func.h:
Manual merge
- Honor unsigned_flag in the corresponding functions
- Use compare_int_signed_unsigned()/compare_int_unsigned_signed() instead of explicit comparison in GREATEST() and LEAST()
mysql-test/r/case.result:
Added test case for bug #20924
mysql-test/r/func_if.result:
Added test case for bug #20924
mysql-test/r/func_test.result:
Added test case for bug #20924
mysql-test/r/user_var.result:
Added test case for bug #20924
mysql-test/t/case.test:
Added test case for bug #20924
mysql-test/t/func_if.test:
Added test case for bug #20924
mysql-test/t/func_test.test:
Added test case for bug #20924
mysql-test/t/user_var.test:
Added test case for bug #20924
sql/item_cmpfunc.cc:
Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
- Moved some code out of Arg_comparator to external functions to be reused in Item_func_min_max
- Fixed IFNULL(), IF(), CASE() and COALESCE()
sql/item_cmpfunc.h:
Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
- Moved some code out of Arg_comparator to external functions to be reused in Item_func_min_max
sql/item_func.cc:
Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
Fixed LEAST(), GREATEST() and "SET @a=..." parts
sql/item_func.h:
Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
Fixed "SET @a=..." part
sql/sql_class.h:
Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various functions
Fixed "SET @a=..." part
- Honor unsigned_flag in the corresponding functions
- Use compare_int_signed_unsigned()/compare_int_unsigned_signed() instead of explicit comparison in GREATEST() and LEAST()
Corrected test case after removal of fix for bug#16377
type_date.test:
Corrected test case after removal of fix for bug#16377
item_cmpfunc.cc:
Removed changes to the agg_cmp_type() made in the for bug#16377
mysql-test/t/type_date.test:
Corrected test case after removal of fix for bug#16377
mysql-test/t/func_time.test:
Corrected test case after removal of fix for bug#16377
mysql-test/r/type_date.result:
Corrected test case after removal of fix for bug#16377
mysql-test/r/query_cache.result:
Corrected test case after removal of fix for bug#16377
mysql-test/r/func_time.result:
Corrected test case after removal of fix for bug#16377
sql/item_cmpfunc.cc:
Removed changes to the agg_cmp_type() made in the for bug#16377
Corrected test case after removal of fix for bug#16377
type_date.test:
Corrected test case after removal of fix for bug#16377
item_cmpfunc.cc:
Removed changes to the agg_cmp_type() made in the for bug#16377
equal constant under any circumstances.
In fact this substitution can be allowed if the field is
not of a type string or if the field reference serves as
an argument of a comparison predicate.
mysql-test/r/func_str.result:
Added test cases for bug #21698.
mysql-test/r/heap_hash.result:
Adjusted results after the fix for bug #21198.
mysql-test/t/func_str.test:
Added test cases for bug #21698.
sql/item.cc:
Fixed bug #21198.
Added a method to check whether a field reference can be
substituted for a constant equal to the field.
This substitution is allowed if the field is not of a type string
or if the field reference serves as an argument of a comparison
predicate.
sql/item.h:
Fixed bug #21698.
Added a new virtual transformation method for a item 'compile'
with two callback function parameters.
Added a new virtual method 'subst_argument_checker' to be used
as an amnalyzer method.
This method is supposed to set its in/out argument to NULL for
the nodes where substitution of a string field for a constant
is not valid.
sql/item_cmpfunc.cc:
Fixed bug #21698.
Added an implementation of the compile method for class Item_cond.
First it processes the Item_cond node with a callback function and if
the latter returns TRUE it proceeds with a transformation performed by
another callback function.
sql/item_cmpfunc.h:
Fixed bug #21698.
Added the implementations of 'subst_argument_checker'
for the Item_func and Item_cond classes.
This method is supposed to set its in/out argument to NULL for
the nodes where substitution of a string field for a constant
is not valid.
Added the declaration of an implementation of the compile method for
class Item_cond.
First it processes the Item_cond node with a callback function and if
the latter returns TRUE it proceeds with a transformation performed by
another callback function.
sql/item_func.cc:
Fixed bug #21698.
Added an implementation of the compile method for class Item_func.
First it processes the Item_func node with a callback function and if
the latter returns TRUE it proceeds with a transformation performed by
another callback function.
sql/item_func.h:
Fixed bug #21698.
Added the declaration of the implementation of the compile method for
class Item_func.
First it processes the Item_func node with a callback function and if
the latter returns TRUE it proceeds with a transformation performed by
another callback function.
sql/sql_select.cc:
Fixed bug #21698.
Limited the conditions at which a field can be substituted
a for an equal constant in a formula.
This substitution is allowed if the field is not of a type string
or if the field reference serves as an argument of a comparison
predicate.
equal constant under any circumstances.
In fact this substitution can be allowed if the field is
not of a type string or if the field reference serves as
an argument of a comparison predicate.
into moonbone.local:/work/tmp_merge-5.1-mysql
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
mysql-test/r/view.result:
SCCS merged
mysql-test/t/view.test:
SCCS merged
mysql-test/lib/mtr_process.pl:
Apply manually the merge from 5.0
mysql-test/mysql-test-run.pl:
Apply manually the merge from 5.0
mysql-test/r/grant.result:
A post-merge fix.
mysql-test/r/im_cmd_line.result:
A post-merge fix.
mysql-test/r/im_instance_conf.result:
A post-merge fix.
mysql-test/r/sp.result:
A post-merge fix.
mysql-test/t/grant.test:
A post-merge fix.
mysql-test/t/im_cmd_line.imtest:
A post-merge fix.
mysql-test/t/im_instance_conf.imtest:
A post-merge fix.
sql/field.cc:
A post-merge fix.
sql/item_cmpfunc.cc:
A post-merge fix.
sql/sp_head.cc:
A post-merge fix.
sql/sp_head.h:
A post-merge fix.
into bodhi.local:/opt/local/work/mysql-5.1-runtime-merge
BitKeeper/deleted/.del-im_check_os.inc:
Auto merged
BitKeeper/deleted/.del-im_options_set.imtest~b53d9d60e5684833:
Auto merged
BitKeeper/deleted/.del-im_options_set.result~59278f56be61d921:
Auto merged
BitKeeper/deleted/.del-im_options_unset.imtest~768eb186b51d0048:
Auto merged
configure.in:
Auto merged
BitKeeper/deleted/.del-im_options_unset.result~20a4790cd3c70a4f:
Auto merged
include/mysql_com.h:
Auto merged
mysql-test/lib/mtr_io.pl:
Auto merged
mysql-test/r/im_daemon_life_cycle.result:
Auto merged
mysql-test/r/im_life_cycle.result:
Auto merged
mysql-test/r/im_utils.result:
Auto merged
mysql-test/r/sp-error.result:
Auto merged
mysql-test/r/trigger.result:
Auto merged
mysql-test/r/type_varchar.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/im_daemon_life_cycle.imtest:
Auto merged
mysql-test/t/im_life_cycle.imtest:
Auto merged
mysql-test/t/im_utils.imtest:
Auto merged
mysql-test/t/sp-error.test:
Auto merged
mysql-test/t/trigger.test:
Auto merged
mysql-test/t/type_varchar.test:
Auto merged
mysql-test/t/view.test:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_row.cc:
Auto merged
sql/item_strfunc.cc:
Auto merged
sql/item_strfunc.h:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/net_serv.cc:
Auto merged
sql/protocol.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_cache.cc:
Auto merged
sql/sql_cache.h:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_error.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_trigger.h:
Auto merged
sql/sql_yacc.yy:
Auto merged
mysql-test/mysql-test-run.pl:
Use local. Alik will merge his changes manually.
mysql-test/lib/mtr_process.pl:
Use local.
mysql-test/r/grant.result:
Use local.
mysql-test/r/sp.result:
Use local.
mysql-test/r/ps.result:
Manual merge.
mysql-test/t/grant.test:
Manual merge.
mysql-test/t/ps.test:
Manual merge.
mysql-test/t/sp.test:
Manual merge.
sql/Makefile.am:
Manual merge.
sql/field.cc:
Manual merge.
sql/mysqld.cc:
Manual merge.
sql/share/errmsg.txt:
Manual merge.
sql/sp.cc:
Manual merge.
sql/sp_head.h:
Manual merge.
sql/sql_trigger.cc:
Manual merge.
sql/sql_view.cc:
Manual merge.
into bodhi.local:/opt/local/work/mysql-5.0-14897
configure.in:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/im_life_cycle.result:
Auto merged
mysql-test/t/im_life_cycle.imtest:
Auto merged
sql/field.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_strfunc.cc:
Auto merged
sql/item_strfunc.h:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_view.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/share/errmsg.txt:
Auto merged
mysql-test/r/grant.result:
Manual merge.
mysql-test/r/view.result:
Manual merge.
mysql-test/t/grant.test:
Manual merge.
mysql-test/t/view.test:
Manual merge.
into moonbone.local:/work/tmp_merge-5.1-opt-mysql
BUILD/check-cpu:
Auto merged
include/config-netware.h:
Auto merged
mysql-test/r/func_time.result:
Auto merged
mysql-test/r/group_by.result:
Auto merged
mysql-test/r/join_outer.result:
Auto merged
mysql-test/r/ndb_condition_pushdown.result:
Auto merged
mysql-test/r/range.result:
Auto merged
mysql-test/r/select.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/r/type_datetime.result:
Auto merged
mysql-test/r/user_var.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/func_time.test:
Auto merged
mysql-test/t/range.test:
Auto merged
mysql-test/t/select.test:
Auto merged
mysql-test/t/type_datetime.test:
Auto merged
mysql-test/t/view.test:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/item_subselect.cc:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/opt_range.h:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_load.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_update.cc:
Auto merged
storage/innobase/btr/btr0btr.c:
Auto merged
storage/innobase/buf/buf0buf.c:
Auto merged
storage/innobase/dict/dict0dict.c:
Auto merged
storage/innobase/fil/fil0fil.c:
Auto merged
storage/innobase/fsp/fsp0fsp.c:
Auto merged
storage/innobase/include/buf0buf.ic:
Auto merged
storage/innobase/log/log0log.c:
Auto merged
storage/innobase/log/log0recv.c:
Auto merged
storage/innobase/os/os0file.c:
Auto merged
storage/innobase/row/row0sel.c:
Auto merged
storage/innobase/srv/srv0start.c:
Auto merged
storage/innobase/ut/ut0dbg.c:
Auto merged
tests/mysql_client_test.c:
Auto merged
client/mysqltest.c:
Manual merge
mysql-test/r/innodb_mysql.result:
Manual merge
mysql-test/t/innodb_mysql.test:
Manual merge
mysql-test/t/join_outer.test:
Manual merge
sql/item_cmpfunc.cc:
Manual merge
sql/mysql_priv.h:
Manual merge
sql/opt_range.cc:
Manual merge
sql/sql_base.cc:
Manual merge
storage/innobase/include/btr0cur.ic:
Manual merge
storage/innobase/row/row0mysql.c:
Manual merge
Changes in an item tree done by optimizer weren't properly
registered and went unnoticed, which resulted in preliminary freeing
of used memory.
mysql-test/r/ps.result:
Add result for bug#21166: Prepared statement causes signal 11
on second execution.
mysql-test/t/ps.test:
Add test case for bug#21166: Prepared statement causes signal 11
on second execution.
sql/item.cc:
Move Item::transform() and Item_default_value::transform() from
item.h here and use THD::change_item_tree() instead of plain
assignment.
Change Item_field::set_no_const_sub() to be used with Item::walk()
instead of Item::transform().
sql/item.h:
Move definition of Item::transform() and Item_default_value::transform()
to item.cc.
Change Item::set_no_const_sub() to be used with Item::walk()
instead of Item::transform().
sql/item_cmpfunc.cc:
Use Item::walk() to execute Item::set_no_const_sub().
Use THD::change_item_tree() instead of plain assignment.
sql/item_func.cc:
Add assert and comment to Item_func::traverse_cond().
sql/item_row.cc:
Use THD::change_item_tree() instead of plain assignment.
sql/item_strfunc.cc:
Move Item_func_make_set::transform() from item_strfunc.h here and use
THD::change_item_tree() instead of plain assignment.
sql/item_strfunc.h:
Move definition of Item_func_make_set::transform() to item_strfunc.cc.
A date can be represented as an int (like 20060101) and as a string (like
"2006.01.01"). When a DATE/TIME field is compared in one SELECT against both
representations the constant propagation mechanism leads to comparison
of DATE as a string and DATE as an int. In this example it compares 2006 and
20060101 integers. Obviously it fails comparison although they represents the
same date.
Now the Item_bool_func2::fix_length_and_dec() function sets the comparison
context for items being compared. I.e. if items compared as strings the
comparison context is STRING.
The constant propagation mechanism now doesn't mix items used in different
comparison contexts. The context check is done in the
Item_field::equal_fields_propagator() and in the change_cond_ref_to_const()
functions.
Also the better fix for bug 21159 is introduced.
mysql-test/t/type_datetime.test:
Added a test case for bug#21475: Wrongly applied constant propagation leads to a false comparison.
mysql-test/r/type_datetime.result:
Added a test case for bug#21475: Wrongly applied constant propagation leads to a false comparison.
sql/sql_select.cc:
Fixed bug#21475: Wrongly applied constant propagation leads to a false comparison.
The constant propagation mechanism now doesn't mix items used in different
comparison contexts. The check is done in the change_cond_ref_to_const() function.
sql/item_cmpfunc.cc:
Fixed bug#21475: Wrongly applied constant propagation leads to a false comparison.
Now the Item_bool_func2::fix_length_and_dec() function sets the comparison
context for items being compared.
sql/item.h:
Fixed bug#21475: Wrongly applied constant propagation leads to a false comparison.
To the Item class a new field called cmp_context is added.
It represents the comparison context of an item.
sql/item.cc:
Fixed bug#21475: Wrongly applied constant propagation leads to a false comparison.
The constant propagation mechanism now doesn't mix items used in different
comparison contexts. The context check is done in the
Item_field::equal_fields_propagator() function.
A date can be represented as an int (like 20060101) and as a string (like
"2006.01.01"). When a DATE/TIME field is compared in one SELECT against both
representations the constant propagation mechanism leads to comparison
of DATE as a string and DATE as an int. In this example it compares 2006 and
20060101 integers. Obviously it fails comparison although they represents the
same date.
Now the Item_bool_func2::fix_length_and_dec() function sets the comparison
context for items being compared. I.e. if items compared as strings the
comparison context is STRING.
The constant propagation mechanism now doesn't mix items used in different
comparison contexts. The context check is done in the
Item_field::equal_fields_propagator() and in the change_cond_ref_to_const()
functions.
Also the better fix for bug 21159 is introduced.
This bug is a side-effect of bug fix#16377. NOW() is optimized in
BETWEEN to integer constants to speed up query execution. When view is being
created it saves already modified query and thus becomes wrong.
The agg_cmp_type() function now substitutes constant result DATE/TIME functions
for their results only if the current query isn't CREATE VIEW or SHOW CREATE
VIEW.
mysql-test/t/view.test:
Added a test case for bug#15950: NOW() optimized away in VIEWs
mysql-test/r/view.result:
Added a test case for bug#15950: NOW() optimized away in VIEWs
sql/item_cmpfunc.cc:
Fixed bug#15950: NOW() optimized away in VIEWs
The agg_cmp_type() function now substitutes constant result DATE/TIME functions
for their results only if the current query isn't CREATE VIEW or SHOW CREATE
VIEW.
This bug is a side-effect of bug fix#16377. NOW() is optimized in
BETWEEN to integer constants to speed up query execution. When view is being
created it saves already modified query and thus becomes wrong.
The agg_cmp_type() function now substitutes constant result DATE/TIME functions
for their results only if the current query isn't CREATE VIEW or SHOW CREATE
VIEW.
into sunlight.local:/local_work/tmp_merge-5.1-opt-mysql
client/mysql.cc:
Auto merged
mysql-test/r/date_formats.result:
Auto merged
mysql-test/r/func_gconcat.result:
Auto merged
mysql-test/r/func_group.result:
Auto merged
mysql-test/r/func_str.result:
Auto merged
mysql-test/r/group_min_max.result:
Auto merged
BitKeeper/deleted/.del-make_win_src_distribution.sh~f80d8fca44e4e5f1:
Auto merged
BitKeeper/deleted/.del-mysqld.dsp~ffdbf2d234e23e56:
Auto merged
BitKeeper/deleted/.del-mysqld_ia64.dsp~7f8cf84d81ee04e2:
Auto merged
BitKeeper/deleted/.del-mysqldump.dsp~a8bd23547d3fc27e:
Auto merged
BitKeeper/deleted/.del-mysqldump_ia64.dsp~a2aabe898be35b31:
Auto merged
mysql-test/r/innodb.result:
Auto merged
mysql-test/r/innodb_mysql.result:
Auto merged
mysql-test/r/ps_7ndb.result:
Auto merged
mysql-test/r/type_ranges.result:
Auto merged
mysql-test/r/udf.result:
Auto merged
mysql-test/r/union.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/date_formats.test:
Auto merged
mysql-test/t/func_gconcat.test:
Auto merged
mysql-test/t/func_group.test:
Auto merged
mysql-test/t/group_min_max.test:
Auto merged
mysql-test/t/innodb.test:
Auto merged
mysql-test/t/innodb_mysql.test:
Auto merged
mysql-test/t/mysql.test:
Auto merged
mysql-test/t/select.test:
Auto merged
mysql-test/t/sp.test:
Auto merged
mysql-test/t/view.test:
Auto merged
sql/field.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/item_strfunc.cc:
Auto merged
sql/item_subselect.cc:
Auto merged
sql/item_subselect.h:
Auto merged
sql/opt_range.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/time.cc:
Auto merged
storage/ndb/test/ndbapi/Makefile.am:
Auto merged
strings/decimal.c:
Auto merged
mysql-test/r/analyse.result:
Manual merge
mysql-test/r/bigint.result:
Manual merge
mysql-test/r/create.result:
Manual merge
mysql-test/r/information_schema.result:
Manual merge
mysql-test/r/ps_2myisam.result:
Manual merge
mysql-test/r/ps_3innodb.result:
Manual merge
mysql-test/r/ps_4heap.result:
Manual merge
mysql-test/r/ps_5merge.result:
Manual merge
mysql-test/r/ps_6bdb.result:
Manual merge
mysql-test/r/rpl_insert_id.result:
Manual merge
mysql-test/r/select.result:
Manual merge
mysql-test/r/sp.result:
Manual merge
mysql-test/r/subselect.result:
Manual merge
mysql-test/t/information_schema.test:
Manual merge
mysql-test/t/rpl_insert_id.test:
Manual merge
sql/field.h:
Manual merge
sql/item.cc:
Manual merge
sql/item.h:
Manual merge
sql/item_strfunc.h:
Manual merge
sql/item_sum.cc:
Manual merge
sql/mysql_priv.h:
Manual merge
sql/share/errmsg.txt:
Manual merge
sql/sql_class.h:
Manual merge
sql/sql_select.cc:
Manual merge
