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konstantin@mysql.com 117b76a562 A fix and a test case for 
Bug#19022 "Memory bug when switching db during trigger execution"
 Bug#17199 "Problem when view calls function from another database."
 Bug#18444 "Fully qualified stored function names don't work correctly in
            SELECT statements"

 Documentation note: this patch introduces a change in behaviour of prepared
 statements.

 This patch adds a few new invariants with regard to how THD::db should
 be used. These invariants should be preserved in future:

  - one should never refer to THD::db by pointer and always make a deep copy
    (strmake, strdup)
  - one should never compare two databases by pointer, but use strncmp or
    my_strncasecmp
  - TABLE_LIST object table->db should be always initialized in the parser or
    by creator of the object.

    For prepared statements it means that if the current database is changed
    after a statement is prepared, the database that was current at prepare
    remains active. This also means that you can not prepare a statement that
    implicitly refers to the current database if the latter is not set.
    This is not documented, and therefore needs documentation. This is NOT a
    change in behavior for almost all SQL statements except:
     - ALTER TABLE t1 RENAME t2 
     - OPTIMIZE TABLE t1
     - ANALYZE TABLE t1
     - TRUNCATE TABLE t1 --
     until this patch t1 or t2 could be evaluated at the first execution of
     prepared statement. 

     CURRENT_DATABASE() still works OK and is evaluated at every execution
     of prepared statement.

     Note, that in stored routines this is not an issue as the default
     database is the database of the stored procedure and "use" statement
     is prohibited in stored routines.

  This patch makes obsolete the use of check_db_used (it was never used in the
  old code too) and all other places that check for table->db and assign it
  from THD::db if it's NULL, except the parser.

 How this patch was created: THD::{db,db_length} were replaced with a
 LEX_STRING, THD::db. All the places that refer to THD::{db,db_length} were
 manually checked and:
  - if the place uses thd->db by pointer, it was fixed to make a deep copy
  - if a place compared two db pointers, it was fixed to compare them by value
    (via strcmp/my_strcasecmp, whatever was approproate)
 Then this intermediate patch was used to write a smaller patch that does the
 same thing but without a rename.

 TODO in 5.1:
   - remove check_db_used
   - deploy THD::set_db in mysql_change_db

 See also comments to individual files.
2006-06-27 00:47:52 +04:00
..
examples documenting HA_STATUS_xxx flags 2005-11-26 08:54:13 +01:00
share Fixed bug #17873: confusing error message when IGNORE/USE/FORCE INDEX 2006-05-30 00:08:58 -07:00
.cvsignore
add_errmsg
client_settings.h
custom_conf.h
derror.cc
des_key_file.cc Many files: 2005-09-30 14:03:55 +02:00
discover.cc
field.cc Remove dflt_field from field structure as this was only needed when createing temporary table and I found another soultion that doesn't increase the size of the field structure for all table instances. (Better fix for bug #19089) 2006-05-24 11:56:59 +03:00
field.h Remove dflt_field from field structure as this was only needed when createing temporary table and I found another soultion that doesn't increase the size of the field structure for all table instances. (Better fix for bug #19089) 2006-05-24 11:56:59 +03:00
field_conv.cc Fix for BUG#18587: Function that accepts and returns TEXT 2006-05-10 23:16:30 +04:00
filesort.cc Move handling of suffix_length from strnxfrm_bin() to filesort to ensure proper sorting of all kind of binary objects 2005-10-14 00:04:52 +03:00
frm_crypt.cc
gen_lex_hash.cc a fix (#10742: Can't compile "sql_lex.cc" on AIX 5.2). 2005-05-19 18:56:01 +05:00
gstream.cc fixes for windows 64-bit compiler warnings 2005-06-13 12:41:15 +02:00
gstream.h
ha_archive.cc Dean noticed that constant flush calls caused the archive stream file to flush empty buffers. This patch removes that behavior. 2006-04-20 18:23:04 -07:00
ha_archive.h Dean noticed that constant flush calls caused the archive stream file to flush empty buffers. This patch removes that behavior. 2006-04-20 18:23:04 -07:00
ha_berkeley.cc BUG#6554 Problem Building MySql on Fedora Core 3 2006-01-16 12:17:30 +01:00
ha_berkeley.h Fixes during review of new code 2005-11-03 22:42:25 +02:00
ha_blackhole.cc bug#10952 2006-05-09 13:31:46 -07:00
ha_blackhole.h Merge a193-229-222-105.elisa-laajakaista.fi:/home/my/bk/mysql-4.1 2005-08-26 15:56:52 +03:00
ha_federated.cc Bug#17377 Federated Engine returns wrong Data, always the rows with the highest ID 2006-02-28 11:17:40 +01:00
ha_federated.h Bug#17377 Federated Engine returns wrong Data, always the rows with the highest ID 2006-02-28 11:17:40 +01:00
ha_heap.cc Manual merge 2006-03-30 17:14:55 +04:00
ha_heap.h Merge mysql.com:/opt/local/work/mysql-4.1-root 2006-02-02 18:17:18 +03:00
ha_innodb.cc Applied innodb-5.0-ss547 snapshot. 2006-05-15 18:02:21 +04:00
ha_innodb.h foo2 2006-04-13 17:22:56 +09:30
ha_myisam.cc bug #15860 (SPATIAL keys in INNODB) 2006-04-12 22:05:23 +05:00
ha_myisam.h A fix and a test case for Bug#10760 and complementary cleanups. 2005-07-19 22:21:12 +04:00
ha_myisammrg.cc bug#10952 2006-05-09 13:31:46 -07:00
ha_myisammrg.h A fix and a test case for Bug#10760 and complementary cleanups. 2005-07-19 22:21:12 +04:00
ha_ndbcluster.cc Merge mskold@bk-internal.mysql.com:/home/bk/mysql-5.0 2006-05-31 15:32:49 +02:00
ha_ndbcluster.h Fix for Bug#17431 INSERT IGNORE INTO returns failed: 1296: err 4350 'Transaction already aborted' 2006-03-23 09:48:46 +01:00
handler.cc foo2 2006-04-13 17:22:56 +09:30
handler.h Merge acurtis@bk-internal:/home/bk/mysql-5.0-engines 2006-05-09 13:34:31 -07:00
hash_filo.cc a compiler must see '#pragma implementation' *before* 2005-06-05 19:38:52 +02:00
hash_filo.h forgotten s/__GNUC__/USE_PRAGMA_INTERFACE/ causes compilation faliures 2005-05-27 14:15:08 +02:00
hostname.cc Merge mysql.com:/usr/home/ram/work/mysql-4.1 2006-03-03 15:32:00 +04:00
init.cc Fixes during review of new pushed code 2005-08-12 13:54:42 +03:00
item.cc Merge rurik.mysql.com:/home/igor/mysql-5.0 2006-05-18 11:30:42 -07:00
item.h Merge mysql.com:/home/kgeorge/mysql/5.0/clean 2006-05-25 10:45:00 +03:00
item_buff.cc sql_select.cc: 2005-07-25 12:57:23 -07:00
item_cmpfunc.cc Merge rurik.mysql.com:/home/igor/mysql-5.0 2006-05-18 11:30:42 -07:00
item_cmpfunc.h Fix compile failure on Win32 2006-04-26 01:21:33 +04:00
item_create.cc Bug#16461: connection_id() does not work properly inside trigger 2006-04-12 19:31:00 +04:00
item_create.h Fix for BUG#12335 (SP replication) : New binlogging strategy for stored PROCEDUREs/FUNCTIONs. 2005-08-25 17:34:34 +04:00
item_func.cc Fixed bug#19077: A nested materialized derived table is used before being populated. 2006-05-18 00:55:28 +04:00
item_func.h After-merge fixes; some function signatures changed from Item * to Item **. 2006-05-15 19:57:10 +02:00
item_geofunc.cc Merge ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-4.1 2005-10-31 11:54:36 +02:00
item_geofunc.h Merge neptunus.(none):/home/msvensson/mysql/bug10241 2005-05-09 11:26:48 +02:00
item_row.cc Merge mysql.com:/opt/local/work/mysql-4.1-16365 2006-04-12 18:30:54 +04:00
item_row.h Merge mysql.com:/opt/local/work/mysql-4.1-16365 2006-04-12 18:30:54 +04:00
item_strfunc.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
item_strfunc.h Bug #13975: "same string" + 0 has 2 different results 2006-05-18 10:34:01 -07:00
item_subselect.cc Bug #19700: subselect returning BIGINT always returned it as SIGNED 2006-05-25 10:39:18 +03:00
item_subselect.h BUG#7549: Missing error message for invalid view selection with subquery. 2006-05-11 15:30:54 +03:00
item_sum.cc Post merge fix 2006-04-20 00:42:12 -07:00
item_sum.h Post merge fix 2006-04-20 00:42:12 -07:00
item_timefunc.cc Remove dflt_field from field structure as this was only needed when createing temporary table and I found another soultion that doesn't increase the size of the field structure for all table instances. (Better fix for bug #19089) 2006-05-24 11:56:59 +03:00
item_timefunc.h Merge mysql.com:/usr/home/bar/mysql-4.1.b18691 2006-04-17 15:01:55 +05:00
item_uniq.cc Merge with 4.1 2005-06-07 00:31:53 +03:00
item_uniq.h Inefficient usage of String::append() fixed. 2005-11-20 20:47:07 +02:00
key.cc Bug #13601: Wrong int type for bit 2006-04-04 17:54:58 -07:00
lex.h Fixed BUG#18949: Test case sp-goto is disabled 2006-04-18 11:07:34 +02:00
lex_symbol.h
lock.cc More DBUG statements 2006-05-24 17:21:35 +03:00
log.cc BUG#18116: Changed of how mutex is handled for XA and rotating binlog 2006-03-31 11:48:08 +02:00
log_event.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
log_event.h Fixed compiler warnings from gcc 4.0.2: 2006-02-25 17:46:30 +02:00
Makefile.am Bug#19575 MySQL-shared-5.0.21-0.glibc23 causes segfault in SSL_library_init 2006-05-31 16:19:06 +02:00
matherr.c
mf_iocache.cc
my_decimal.cc Fix for bug #13573 (wrong data inserted for too big decimals) 2005-10-15 21:57:32 +05:00
my_decimal.h Fix for bug #13573 (wrong data inserted for too big decimals) 2005-10-15 21:57:32 +05:00
my_lock.c
mysql_priv.h Merge mysql.com:/home/kgeorge/mysql/5.0/clean 2006-05-26 11:51:30 +03:00
mysqld.cc Bug#18235: assertion/crash when windows mysqld is ended with ctrl-c 2006-05-31 14:27:31 +02:00
mysqld_suffix.h
net_serv.cc Make the define start at "start of line" 2006-03-02 10:55:55 +01:00
nt_servc.cc
nt_servc.h
opt_range.cc BUG#19618: post-review fixes: better comments 2006-05-16 13:39:03 +04:00
opt_range.h many warnings (practically safe but annoying) corrected 2006-01-03 17:54:54 +01:00
opt_sum.cc Remove redundant code in opt_sum_query() 2006-04-06 21:42:03 +04:00
parse_file.cc Fix for BUG#15921: DROP TRIGGER - can't be drop trigger created 2006-03-28 01:01:51 +04:00
parse_file.h Fix for BUG#15921: DROP TRIGGER - can't be drop trigger created 2006-03-28 01:01:51 +04:00
password.c Merge mysql.com:/opt/local/work/mysql-4.1-root 2006-01-11 17:49:56 +03:00
procedure.cc Merge with 4.1 2005-06-07 00:31:53 +03:00
procedure.h Merge neptunus.(none):/home/msvensson/mysql/bug10241 2005-05-09 11:26:48 +02:00
protocol.cc Fixes to embedded server to be able to run tests with it 2006-02-24 18:34:15 +02:00
protocol.h Fixes to embedded server to be able to run tests with it 2006-02-24 18:34:15 +02:00
records.cc Merge ua141d10.elisa.omakaista.fi:/home/my/bk/mysql-4.1 2005-10-27 23:43:20 +03:00
repl_failsafe.cc Bug #18607: LOAD DATA FROM MASTER fails because of INFORMATION_SCHEMA database 2006-04-21 18:26:39 -07:00
repl_failsafe.h pthread_handler_decl() changed to be ctags-friendly 2005-10-08 16:39:55 +02:00
set_var.cc Bug #1039: tmpdir and datadir not available via @@ system variable syntax 2006-05-08 16:38:45 -07:00
set_var.h Bug #1039: tmpdir and datadir not available via @@ system variable syntax 2006-05-08 16:38:45 -07:00
slave.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
slave.h A fix and a test case for 2006-06-27 00:47:52 +04:00
sp.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sp.h A fix and a test case for 2006-06-27 00:47:52 +04:00
sp_cache.cc Fix use of "%*s" *printf() specifiers that were really meant to be 2005-10-06 17:37:24 -07:00
sp_cache.h BUG#12228: Post review fixes: Added test case, code cleanup. 2005-08-10 21:17:02 +00:00
sp_head.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sp_head.h A fix and a test case for 2006-06-27 00:47:52 +04:00
sp_pcontext.cc Fixed BUG#18949: Test case sp-goto is disabled 2006-04-18 11:07:34 +02:00
sp_pcontext.h Fixed BUG#18949: Test case sp-goto is disabled 2006-04-18 11:07:34 +02:00
sp_rcontext.cc BUG#18037: Fix stack corruption in THD::rollback_item_tree_changes(). 2006-05-15 12:01:55 +02:00
sp_rcontext.h BUG#18037: Fix stack corruption in THD::rollback_item_tree_changes(). 2006-05-15 12:01:55 +02:00
spatial.cc Merge sanja.is.com.ua:/home/bell/mysql/bk/work-bug1-5.0 2005-11-21 21:15:48 +02:00
spatial.h Fixed compiler warnings from gcc 4.0.2: 2006-02-25 17:46:30 +02:00
sql_acl.cc Merge neptunus.(none):/home/msvensson/mysql/mysql-5.0 2006-05-29 15:06:37 +02:00
sql_acl.h Reapply fix for bug#16372 (Server crashes when test 'conc_sys' is running) 2006-05-06 11:25:59 +04:00
sql_analyse.cc Porting fix that allows others to include compiled code with different parsers. 2006-03-09 10:09:52 -08:00
sql_analyse.h Merge from 4.1 2005-05-26 21:01:55 +02:00
sql_array.h Fix for BUG#12335 (SP replication) : New binlogging strategy for stored PROCEDUREs/FUNCTIONs. 2005-08-25 17:34:34 +04:00
sql_base.cc Post-merge fixes 2006-05-31 22:55:45 -07:00
sql_bitmap.h Bug#10932 - Building server with key limit of 128, makes test cases fail 2005-07-19 14:13:56 +02:00
sql_cache.cc Fixed BUG#15758: "Holding adaptive search latch in 2006-04-07 23:58:17 +04:00
sql_cache.h Fixed compiler warnings from gcc 4.0.2: 2006-02-25 17:46:30 +02:00
sql_class.cc Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-4.1 2006-05-25 16:05:55 +05:00
sql_class.h A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_client.cc
sql_crypt.cc a compiler must see '#pragma implementation' *before* 2005-06-05 19:38:52 +02:00
sql_crypt.h Add ifdefs to control when "#pragma implementation" should be used 2005-05-26 12:09:14 +02:00
sql_cursor.cc Fixed BUG#15758: "Holding adaptive search latch in 2006-04-07 23:58:17 +04:00
sql_cursor.h A fix and a test case for Bug#6513 "Test Suite: Values inserted by using 2005-09-22 02:11:21 +04:00
sql_db.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_delete.cc BUG#18681: View privileges are broken 2006-05-26 11:47:53 +03:00
sql_derived.cc support of view underlying tables and SP functions security check added (BUG#9505) (WL#2787) 2005-10-28 00:18:23 +03:00
sql_do.cc Name resolution context added (BUG#6443) 2005-07-01 07:05:42 +03:00
sql_error.cc Add extre DBUG_PRINT in push_warning 2006-03-16 12:06:39 +01:00
sql_error.h Invalid DEFAULT values for CREATE TABLE now generates errors. (Bug #5902) 2005-04-01 15:04:50 +03:00
sql_handler.cc Changed condition similar to code in 4.1. 2006-01-16 23:15:00 +02:00
sql_help.cc many warnings (practically safe but annoying) corrected 2006-01-03 17:54:54 +01:00
sql_insert.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_lex.cc Bug#17204 "second CALL to procedure crashes Server" 2006-05-30 10:45:23 +05:00
sql_lex.h A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_list.cc a compiler must see '#pragma implementation' *before* 2005-06-05 19:38:52 +02:00
sql_list.h WL#2486 - Natural/using join according to SQL:2003. 2005-11-28 21:57:50 +02:00
sql_load.cc BUG#18681: View privileges are broken 2006-05-26 11:47:53 +03:00
sql_manager.cc Merge bk-internal.mysql.com:/home/bk/mysql-5.0 2005-10-12 00:59:52 +03:00
sql_manager.h
sql_map.cc WL#2286 - Compile MySQL w/YASSL support 2005-06-22 14:08:28 +05:00
sql_map.h Add ifdefs to control when "#pragma implementation" should be used 2005-05-26 12:09:14 +02:00
sql_olap.cc Implementation of WL#2486 - 2005-08-12 17:57:19 +03:00
sql_parse.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_prepare.cc Post-merge fixes. 2006-05-07 16:14:43 -07:00
sql_rename.cc Fix for bug #13525 "Rename table does not keep info of triggers". 2006-02-24 23:50:36 +03:00
sql_repl.cc foo2 2006-04-13 17:22:56 +09:30
sql_repl.h WL#874 "Extended LOAD DATA". 2005-03-16 04:32:47 +03:00
sql_select.cc Merge mysql.com:/home/kgeorge/mysql/5.0/clean 2006-05-26 11:51:30 +03:00
sql_select.h Merge bk-internal.mysql.com:/home/bk/mysql-5.0 2006-02-27 20:00:03 +03:00
sql_show.cc Bug#17204 "second CALL to procedure crashes Server" 2006-05-30 10:45:23 +05:00
sql_sort.h
sql_state.c
sql_string.cc Merge mysql.com:/usr/home/bar/mysql-4.1.b15376 2006-03-23 12:41:28 +04:00
sql_string.h Netware specific changes. 2005-12-14 01:21:56 +02:00
sql_table.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_test.cc Post-review changes. 2006-05-03 21:35:27 -07:00
sql_trigger.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_trigger.h Merge bk-internal.mysql.com:/home/bk/mysql-5.0-runtime 2006-02-26 16:38:48 +03:00
sql_udf.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_udf.h Name resolution context added (BUG#6443) 2005-07-01 07:05:42 +03:00
sql_union.cc Post merge fixes 2006-04-21 08:19:38 -07:00
sql_update.cc BUG#18681: View privileges are broken 2006-05-26 11:47:53 +03:00
sql_view.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
sql_view.h Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.0 2005-11-03 16:43:05 +02:00
sql_yacc.yy A fix and a test case for 2006-06-27 00:47:52 +04:00
stacktrace.c Step 2 of the switch to support configuration with NPTL: 2005-04-20 20:38:57 +02:00
stacktrace.h Step 2 of the switch to support configuration with NPTL: 2005-04-20 20:38:57 +02:00
strfunc.cc
structs.h Inefficient usage of String::append() fixed. 2005-11-20 20:47:07 +02:00
table.cc Merge mysql.com:/home/kgeorge/mysql/5.0/clean 2006-05-26 11:57:56 +03:00
table.h BUG#17379 Wrong reuse of E(#rows(range)) as E(#rows(ref(const))): 2006-05-10 17:40:20 +04:00
thr_malloc.cc
time.cc Fixes during review of new pushed code 2005-07-31 12:49:55 +03:00
tzfile.h
tztime.cc A fix and a test case for 2006-06-27 00:47:52 +04:00
tztime.h Fix for bug#11081 "Using a CONVERT_TZ function in a stored function or 2006-04-24 18:57:00 +04:00
udf_example.cc Fix small bug in udf_example.cc, it was processing one char too much and thus returning junk 2006-04-28 11:37:20 +02:00
uniques.cc many warnings (practically safe but annoying) corrected 2006-01-03 17:54:54 +01:00
unireg.cc A fix and a test case for Bug#14210 "Simple query with > operator on 2005-11-03 14:20:13 +03:00
unireg.h Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was 2006-04-12 23:05:38 +04:00
watchdog_mysqld