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Commit Graph

1240 Commits

Author SHA1 Message Date
unknown
9368c7bcd8 Update mysqltest to latest version
- ie. backport from 5.1
 - also update testcase error dected by new version


mysql-test/include/show_msg.inc:
  BitKeeper file /home/msvensson/mysql/same_tools/my41-same_tools/mysql-test/include/show_msg.inc
mysql-test/include/show_msg80.inc:
  BitKeeper file /home/msvensson/mysql/same_tools/my41-same_tools/mysql-test/include/show_msg80.inc
BitKeeper/deleted/.del-rpl_chain_temp_table.test:
  Delete: mysql-test/t/rpl_chain_temp_table.test
BitKeeper/deleted/.del-rpl_chain_temp_table.result:
  Delete: mysql-test/r/rpl_chain_temp_table.result
BitKeeper/deleted/.del-rpl_failsafe.result:
  Delete: mysql-test/r/rpl_failsafe.result
BitKeeper/deleted/.del-rpl_failsafe.test:
  Delete: mysql-test/t/rpl_failsafe.test
BitKeeper/deleted/.del-rpl_heap.test:
  Delete: mysql-test/t/rpl_heap.test
BitKeeper/deleted/.del-rpl_heap.result:
  Delete: mysql-test/r/rpl_heap.result
BitKeeper/deleted/.del-rpl000018.result:
  Delete: mysql-test/r/rpl000018.result
BitKeeper/deleted/.del-rpl000018.test:
  Delete: mysql-test/t/rpl000018.test
client/Makefile.am:
  Link mysqltest with mysys/my_copy.c
client/mysqltest.c:
  Update mysqltest to latest version
mysql-test/include/have_multi_ndb.inc:
  Remove old syntax "@filename" in favor of "--require filename"
mysql-test/include/master-slave.inc:
  Remove old syntax "@filename" in favor of "--require filename"
mysql-test/include/ps_query.inc:
  Remove the comment about no output now when it does.
mysql-test/r/check.result:
  Update output from --send
mysql-test/r/connect.result:
  Update result file for connect test after backport form 5.1
mysql-test/r/flush.result:
  Update output from --send
mysql-test/r/flush_block_commit.result:
  Update output from --send
mysql-test/r/func_misc.result:
  Update output from --send
mysql-test/r/grant2.result:
  Update output from --send
mysql-test/r/handler.result:
  Update output from --send
mysql-test/r/kill.result:
  Update output from --send
mysql-test/r/lock_multi.result:
  Update output from --send
mysql-test/r/mix_innodb_myisam_binlog.result:
  Update output from --send
mysql-test/r/mysqltest.result:
  Update mysqltest.result after backport
mysql-test/r/ps_2myisam.result:
  Update result as the output from query is now printed
mysql-test/r/ps_3innodb.result:
  Update result as the output from query is now printed
mysql-test/r/ps_4heap.result:
  Update result as the output from query is now printed
mysql-test/r/ps_5merge.result:
  Update result as the output from query is now printed
mysql-test/r/ps_6bdb.result:
  Update result as the output from query is now printed
mysql-test/r/ps_7ndb.result:
  Update result as the output from query is now printed
mysql-test/r/rename.result:
  Update output from --send
mysql-test/r/rpl000001.result:
  Update output from --send
mysql-test/r/rpl_error_ignored_table.result:
  Update output from --send
mysql-test/r/rpl_master_pos_wait.result:
  Update output from --send
mysql-test/r/subselect.result:
  Update result file after adding missing ;
mysql-test/r/synchronization.result:
  Update output from --send
mysql-test/r/type_blob.result:
  Update result file after adding missing ;
mysql-test/t/connect.test:
  Backport test from 5.1
mysql-test/t/init_file.test:
  Update test so something is printed
mysql-test/t/mysql_client_test.test:
  Update test so result is sent to file and something is printed
mysql-test/t/mysqltest.test:
  Backport latest mysqltest.test file
mysql-test/t/ps.test:
  Move the --replace_column statement to just before the statetement it should replace
mysql-test/t/ps_1general.test:
  Move the --replace_column statement to just before the statetement it should replace
mysql-test/t/ps_grant.test:
  Remove the $DB, no other test uses it
mysql-test/t/rpl_flush_tables.test:
  Fetch $SERVER_VERSION from the db server
mysql-test/t/rpl_trunc_temp.test:
  Remove the selection of connection master after it's been disconnected already
mysql-test/t/subselect.test:
  Add missing ;
mysql-test/t/type_blob.test:
  Add missing ;
2006-10-03 15:33:44 +02:00
msvensson@shellback.(none)
2cea0e6b13 Update mysqltest to latest version
- ie. backport from 5.1
 - also update testcase error dected by new version
2006-10-03 15:33:44 +02:00
unknown
39222bff45 Merge rurik.mysql.com:/home/igor/mysql-4.1-opt
into  rurik.mysql.com:/home/igor/mysql-5.0-opt


mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
sql/item.cc:
  Manual merge
2006-09-25 06:46:15 -07:00
igor@rurik.mysql.com
c0569012d0 Merge rurik.mysql.com:/home/igor/mysql-4.1-opt
into  rurik.mysql.com:/home/igor/mysql-5.0-opt
2006-09-25 06:46:15 -07:00
unknown
9bf2ed9553 Fixed bug #21853: assert failure for a grouping query with
an ALL/ANY quantified subquery in HAVING.
The Item::split_sum_func2 method should not create Item_ref
for objects of any class derived from Item_subselect.


mysql-test/r/subselect.result:
  Added a test case for bug #21853.
mysql-test/t/subselect.test:
  Added a test case for bug #21853.
2006-09-25 05:24:07 -07:00
igor@rurik.mysql.com
55dd569bab Fixed bug #21853: assert failure for a grouping query with
an ALL/ANY quantified subquery in HAVING.
The Item::split_sum_func2 method should not create Item_ref
for objects of any class derived from Item_subselect.
2006-09-25 05:24:07 -07:00
unknown
de5b4eba91 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B21540-5.0-opt


mysql-test/r/func_group.result:
  Auto merged
sql/item_sum.cc:
  Auto merged
2006-09-19 19:18:52 +03:00
gkodinov/kgeorge@rakia.(none)
2da037c7d5 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B21540-5.0-opt
2006-09-19 19:18:52 +03:00
unknown
7a0f9c8d4c Merge dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt
into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt


mysql-test/r/subselect.result:
  SCCS merged
mysql-test/t/subselect.test:
  SCCS merged
2006-09-18 11:19:40 +02:00
gkodinov@dl145s.mysql.com
522823b5d3 Merge dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt
into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt
2006-09-18 11:19:40 +02:00
unknown
e5345197ed Merge bk-internal:/home/bk/mysql-4.1-opt
into  macbook.gmz:/Users/kgeorge/mysql/work/B21180-4.1-opt


mysql-test/r/subselect.result:
  merge of 4.1-opt
mysql-test/t/subselect.test:
  merge of 4.1-opt
sql/opt_range.h:
  merge of 4.1-opt
2006-09-15 18:56:05 +03:00
gkodinov/kgeorge@macbook.gmz
c73d2318a3 Merge bk-internal:/home/bk/mysql-4.1-opt
into  macbook.gmz:/Users/kgeorge/mysql/work/B21180-4.1-opt
2006-09-15 18:56:05 +03:00
unknown
2a00a073c2 Bug #21540: Subqueries with no from and aggregate functions return
wrong results
 Mark the containing Item(s) (Item_subselect descendant usually) of 
 a subselect as containing aggregate functions if it has references
 to aggregates functions that are calculated outside its context.
 This tels end_send_group() not to make an Item_subselect descendant in
 select list a copy and causes the correct value being returned.


mysql-test/r/func_group.result:
  Bug #21540: Subqueries with no from and aggregate functions return
              wrong results
   - test cases
mysql-test/r/subselect.result:
  Bug #21540: Subqueries with no from and aggregate functions return
              wrong results
   - fixed the result of an existing testcase.
mysql-test/t/subselect.test:
  Bug #21540: Subqueries with no from and aggregate functions return
              wrong results
   - test cases
sql/item_sum.cc:
  Bug #21540: Subqueries with no from and aggregate functions return
              wrong results
   Mark the containing Item (Item_subselect descendant usually) of 
   a subselect as containing aggregate functions if it has references
   to aggregates functions that are calculated outside its context.
   This tels end_send_group() not to make an Item_subselect descendant in
   select list a copy and causes the correct value being returned.
2006-09-08 19:04:46 +03:00
gkodinov/kgeorge@macbook.gmz
5bc16fd954 Bug #21540: Subqueries with no from and aggregate functions return
wrong results
 Mark the containing Item(s) (Item_subselect descendant usually) of 
 a subselect as containing aggregate functions if it has references
 to aggregates functions that are calculated outside its context.
 This tels end_send_group() not to make an Item_subselect descendant in
 select list a copy and causes the correct value being returned.
2006-09-08 19:04:46 +03:00
unknown
a0e959271d Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B14654-5.0-opt


mysql-test/r/subselect.result:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
2006-09-04 11:34:32 +03:00
gkodinov/kgeorge@rakia.(none)
43e05210c5 Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rakia.(none):/home/kgeorge/mysql/autopush/B14654-5.0-opt
2006-09-04 11:34:32 +03:00
unknown
c9bba13aee Bug#14654 : Cannot select from the same table twice within a UNION statement
Made the parser to support parenthesis around UNION branches.
 This is done by amending the rules of the parser so it generates the correct
 structure.
 Currently it supports arbitrary subquery/join/parenthesis operations in the 
 EXISTS clause. 
 In the IN/scalar subquery case it will allow adding nested parenthesis only 
 if there is an UNION clause after the parenthesis. Otherwise it will just  
 treat the multiple nested parenthesis as a scalar expression.
 It adds extra lex level for ((SELECT ...) UNION ...) to accommodate for the
 UNION clause.


mysql-test/r/subselect.result:
  Bug#14654 : Cannot select from the same table twice within a UNION statement
   - test cases
mysql-test/t/subselect.test:
  Bug#14654 : Cannot select from the same table twice within a UNION statement
   - test cases
sql/sql_yacc.yy:
  Bug#14654 : Cannot select from the same table twice within a UNION statement
   - shuffle around the rules for the parenthesis in subselect
2006-08-31 18:00:25 +03:00
gkodinov/kgeorge@macbook.gmz
e5bc4c7e77 Bug#14654 : Cannot select from the same table twice within a UNION statement
Made the parser to support parenthesis around UNION branches.
 This is done by amending the rules of the parser so it generates the correct
 structure.
 Currently it supports arbitrary subquery/join/parenthesis operations in the 
 EXISTS clause. 
 In the IN/scalar subquery case it will allow adding nested parenthesis only 
 if there is an UNION clause after the parenthesis. Otherwise it will just  
 treat the multiple nested parenthesis as a scalar expression.
 It adds extra lex level for ((SELECT ...) UNION ...) to accommodate for the
 UNION clause.
2006-08-31 18:00:25 +03:00
unknown
251409bbf3 BUG#16255: Merge to 5.0 2006-08-24 20:56:28 +04:00
sergefp@mysql.com
84e9cb794f BUG#16255: Merge to 5.0 2006-08-24 20:56:28 +04:00
unknown
f895a16c72 BUG#16255: Post-review fixes: adjust the testcase.
mysql-test/r/subselect.result:
  BUG#16255: A proper testcase
mysql-test/t/subselect.test:
  BUG#16255: A proper testcase
2006-08-24 19:16:27 +04:00
sergefp@mysql.com
848548e16f BUG#16255: Post-review fixes: adjust the testcase. 2006-08-24 19:16:27 +04:00
unknown
c74c819533 Bug #16255: Subquery in WHERE (the cset by Georgi Kodinov)
Must not use Item_direct_ref in HAVING because it points to
 the new value (witch is not yet calculated for the first row).


mysql-test/r/subselect.result:
  Bug #16255: Subquery in where
   - test case
mysql-test/t/subselect.test:
  Bug #16255: Subquery in where
   - test case
sql/item_subselect.cc:
  Bug #16255: Subquery in where
   Must not use Item_direct_ref in HAVING because it points to
   the new value (witch is not yet calculated for the first row).
2006-08-24 19:14:36 +04:00
sergefp@mysql.com
d4cacdb5cc Bug #16255: Subquery in WHERE (the cset by Georgi Kodinov)
Must not use Item_direct_ref in HAVING because it points to
 the new value (witch is not yet calculated for the first row).
2006-08-24 19:14:36 +04:00
unknown
8462d3a46a Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
Reseting subqueries with "quick" access methods was incomplete.
 Partially backported the correct reseting of QUICK_SELECTs from 5.x.


mysql-test/r/subselect.result:
  Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
   - test case
mysql-test/t/subselect.test:
  Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
   - test case
sql/opt_range.cc:
  Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
   - partially backported the correct reseting of QUICK_SELECTs from 5.x.
sql/opt_range.h:
  Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
   - partially backported the correct reseting of QUICK_SELECTs from 5.x.
2006-08-03 19:20:30 +03:00
gkodinov/kgeorge@macbook.gmz
3183f73601 Bug #21180: Subselect with index for both WHERE and ORDER BY produces empty result
Reseting subqueries with "quick" access methods was incomplete.
 Partially backported the correct reseting of QUICK_SELECTs from 5.x.
2006-08-03 19:20:30 +03:00
unknown
8fc51f7aa6 Merge mysql.com:/home/psergey/mysql-4.1-opt
into  mysql.com:/home/psergey/mysql-5.0-opt2


mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
2006-07-22 02:41:29 +04:00
sergefp@mysql.com
964a4b5f95 Merge mysql.com:/home/psergey/mysql-4.1-opt
into  mysql.com:/home/psergey/mysql-5.0-opt2
2006-07-22 02:41:29 +04:00
unknown
9d432f0dae Add missing "DROP TABLE" clause 2006-07-22 02:36:17 +04:00
sergefp@mysql.com
59dc5e8838 Add missing "DROP TABLE" clause 2006-07-22 02:36:17 +04:00
unknown
c13be23004 Merge mysql.com:/home/psergey/mysql-4.1-opt
into  mysql.com:/home/psergey/mysql-5.0-opt


sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/item_subselect.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
sql/mysql_priv.h:
  Manual merge
2006-07-21 23:45:34 +04:00
sergefp@mysql.com
9024ed81c7 Merge mysql.com:/home/psergey/mysql-4.1-opt
into  mysql.com:/home/psergey/mysql-5.0-opt
2006-07-21 23:45:34 +04:00
unknown
68698c04ab BUG#20975: Incorrect query result for NOT (subquery):
Add implementations of Item_func_{nop,not}_all::neg_transformer


mysql-test/r/subselect.result:
  BUG#20975: testcase
mysql-test/t/subselect.test:
  BUG#20975: testcase
sql/mysql_priv.h:
  Make chooser_compare_func_creator visible in item.h
2006-07-21 03:04:04 +04:00
sergefp@mysql.com
bffd438de3 BUG#20975: Incorrect query result for NOT (subquery):
Add implementations of Item_func_{nop,not}_all::neg_transformer
2006-07-21 03:04:04 +04:00
unknown
8972b0bf0d Merge ibabaev@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rurik.mysql.com:/home/igor/mysql-5.0-opt


mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
2006-07-17 13:24:43 -07:00
igor@rurik.mysql.com
3d83d5aa03 Merge ibabaev@bk-internal.mysql.com:/home/bk/mysql-5.0-opt
into  rurik.mysql.com:/home/igor/mysql-5.0-opt
2006-07-17 13:24:43 -07:00
unknown
109615048d Fixed bug #20869.
The bug caused a crash of the server if a subquery with
ORDER BY DESC used the range access method.
The bug happened because the method QUICK_SELECT_DESC::reset
was not reworked after MRR interface had been introduced.


mysql-test/r/subselect.result:
  Added a test case for bug #20869.
mysql-test/t/subselect.test:
  Added a test case for bug #20869.
2006-07-15 00:28:21 -07:00
igor@rurik.mysql.com
38cd55a758 Fixed bug #20869.
The bug caused a crash of the server if a subquery with
ORDER BY DESC used the range access method.
The bug happened because the method QUICK_SELECT_DESC::reset
was not reworked after MRR interface had been introduced.
2006-07-15 00:28:21 -07:00
unknown
203d46bb38 Fixed bug #20519.
The bug was due to a loss happened during a refactoring made
on May 30 2005 that modified the function JOIN::reinit.
As a result of it for any subquery the value of offset_limit_cnt
was not restored for the following executions. Yet the first 
execution of the subquery made it equal to 0.
The fix restores this value in the function JOIN::reinit.  


mysql-test/r/subselect.result:
  Added a test case fir bug #20519.
mysql-test/t/subselect.test:
  Added a test case fir bug #20519.
2006-07-14 19:28:58 -07:00
igor@olga.mysql.com
4de3186ae1 Fixed bug #20519.
The bug was due to a loss happened during a refactoring made
on May 30 2005 that modified the function JOIN::reinit.
As a result of it for any subquery the value of offset_limit_cnt
was not restored for the following executions. Yet the first 
execution of the subquery made it equal to 0.
The fix restores this value in the function JOIN::reinit.
2006-07-14 19:28:58 -07:00
unknown
80eae1a3c9 Merge moonbone.local:/work/16302-bug-4.1-opt-mysql
into  moonbone.local:/work/tmp_merge-5.0-opt-mysql


sql/item_subselect.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
2006-07-13 18:18:20 +04:00
evgen@moonbone.local
4b1730241d Merge moonbone.local:/work/16302-bug-4.1-opt-mysql
into  moonbone.local:/work/tmp_merge-5.0-opt-mysql
2006-07-13 18:18:20 +04:00
unknown
e2c448fb5c Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt
into  moonbone.local:/work/16302-bug-4.1-opt-mysql


mysql-test/r/subselect.result:
  SCCS merged
mysql-test/t/subselect.test:
  SCCS merged
2006-07-12 06:12:59 +04:00
evgen@moonbone.local
363d14569e Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt
into  moonbone.local:/work/16302-bug-4.1-opt-mysql
2006-07-12 06:12:59 +04:00
unknown
d2bbf288a9 Fixed bug#18503: Queries with a quantified subquery returning empty set
may return a wrong result.

An Item_sum_hybrid object has the was_values flag which indicates whether any
values were added to the sum function. By default it is set to true and reset
to false on any no_rows_in_result() call. This method is called only in
return_zero_rows() function. An ALL/ANY subquery can be optimized by MIN/MAX
optimization. The was_values flag is used to indicate whether the subquery
has returned at least one row. This bug occurs because return_zero_rows() is
called only when we know that the select will return zero rows before
starting any scans but often such information is not known.
In the reported case the return_zero_rows() function is not called and
the was_values flag is not reset to false and yet the subquery return no rows
Item_func_not_all and Item_func_nop_all functions return a wrong
comparison result.

The end_send_group() function now calls no_rows_in_result() for each item
in the fields_list if there is no rows were found for the (sub)query.


mysql-test/t/subselect.test:
  Added test case for bug#18503: Queries with a quantified subquery returning empty set may return a wrong result.
mysql-test/r/subselect.result:
  Added test case for bug#18503: Queries with a quantified subquery returning empty set may return a wrong result.
sql/sql_select.cc:
  Fixed bug#18503: Queries with a quantified subquery returning empty set may return a wrong result.
  
  The end_send_group() function now calls no_rows_in_result() for each item
  in the fields_list if there is no matching rows were found.
2006-07-12 01:52:18 +04:00
evgen@moonbone.local
8ffda481c9 Fixed bug#18503: Queries with a quantified subquery returning empty set
may return a wrong result.

An Item_sum_hybrid object has the was_values flag which indicates whether any
values were added to the sum function. By default it is set to true and reset
to false on any no_rows_in_result() call. This method is called only in
return_zero_rows() function. An ALL/ANY subquery can be optimized by MIN/MAX
optimization. The was_values flag is used to indicate whether the subquery
has returned at least one row. This bug occurs because return_zero_rows() is
called only when we know that the select will return zero rows before
starting any scans but often such information is not known.
In the reported case the return_zero_rows() function is not called and
the was_values flag is not reset to false and yet the subquery return no rows
Item_func_not_all and Item_func_nop_all functions return a wrong
comparison result.

The end_send_group() function now calls no_rows_in_result() for each item
in the fields_list if there is no rows were found for the (sub)query.
2006-07-12 01:52:18 +04:00
unknown
ad88eabd35 Fixed bug#16302: Quantified subquery without any tables gives wrong results
The ALL/ANY subqueries are the subject of MIN/MAX optimization. The matter
of this optimization is to embed MIN() or MAX() function into the subquery
in order to get only one row by which we can tell whether the expression
with ALL/ANY subquery is true or false.
But when it is applied to a subquery like 'select a_constant' the reported bug
occurs. As no tables are specified in the subquery the do_select() function 
isn't called for the optimized subquery and thus no values have been added 
to a MIN()/MAX() function and it returns NULL instead of a_constant.
This leads to a wrong query result.

For the subquery like 'select a_constant' there is no reason to apply
MIN/MAX optimization because the subquery anyway will return at most one row.
Thus the Item_maxmin_subselect class is more appropriate for handling such
subqueries.

The Item_in_subselect::single_value_transformer() function now checks
whether tables are specified for the subquery. If no then this subselect is
handled like a UNION using an Item_maxmin_subselect object.


mysql-test/t/subselect.test:
  Added test case for bug#16302: Quantified subquery without any tables gives wrong results
mysql-test/r/subselect.result:
  Added test case for bug#16302: Quantified subquery without any tables gives wrong results
sql/item_subselect.cc:
  Fixed bug#16302: Quantified subquery without any tables gives wrong results
   
  The Item_in_subselect::single_value_transformer() function now checks
  whether tables are specified for the subquery. If no then this subselect is
  handled like a UNION using an Item_maxmin_subselect object.
2006-07-11 00:34:37 +04:00
evgen@moonbone.local
d34189715e Fixed bug#16302: Quantified subquery without any tables gives wrong results
The ALL/ANY subqueries are the subject of MIN/MAX optimization. The matter
of this optimization is to embed MIN() or MAX() function into the subquery
in order to get only one row by which we can tell whether the expression
with ALL/ANY subquery is true or false.
But when it is applied to a subquery like 'select a_constant' the reported bug
occurs. As no tables are specified in the subquery the do_select() function 
isn't called for the optimized subquery and thus no values have been added 
to a MIN()/MAX() function and it returns NULL instead of a_constant.
This leads to a wrong query result.

For the subquery like 'select a_constant' there is no reason to apply
MIN/MAX optimization because the subquery anyway will return at most one row.
Thus the Item_maxmin_subselect class is more appropriate for handling such
subqueries.

The Item_in_subselect::single_value_transformer() function now checks
whether tables are specified for the subquery. If no then this subselect is
handled like a UNION using an Item_maxmin_subselect object.
2006-07-11 00:34:37 +04:00
unknown
a2f861f5ad Bug #19700: subselect returning BIGINT always returned it as SIGNED
The unsigned flag in Item was not propagated through the single value subqueries.
This caused the result to be treated as signed.


mysql-test/r/subselect.result:
  Added testcases for bug #19700
mysql-test/t/subselect.test:
  Added testcases for bug #19700
sql/item.h:
  Preserved the unsigned flag in Item_subselect
sql/item_subselect.cc:
  Preserved the unsigned flag in Item_subselect
2006-05-25 10:39:18 +03:00
gkodinov@mysql.com
d6b5a89044 Bug #19700: subselect returning BIGINT always returned it as SIGNED
The unsigned flag in Item was not propagated through the single value subqueries.
This caused the result to be treated as signed.
2006-05-25 10:39:18 +03:00