Prevent bugs by making DBUG_* expressions syntactically equivalent

to a single statement.
---
Bug#24795: SHOW PROFILE

Profiling is only partially functional on some architectures.  Where 
there is no getrusage() system call, presently Null values are 
returned where it would be required.  Notably, Windows needs some love 
applied to make it as useful.

  Syntax this adds:
  
  SHOW PROFILES
  
  SHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]
   where "n" is an integer
   and "types" is zero or many (comma-separated) of
      "CPU"
      "MEMORY" (not presently supported)
      "BLOCK IO"
      "CONTEXT SWITCHES"
      "PAGE FAULTS"
      "IPC"
      "SWAPS"
      "SOURCE"
      "ALL"

It also adds a session variable (boolean) "profiling", set to "no"
by default, and (integer) profiling_history_size, set to 15 by 
default.

This patch abstracts setting THDs' "proc_info" behind a macro that 
can be used as a hook into the profiling code when profiling 
support is compiled in.  All future code in this line should use
that mechanism for setting thd->proc_info.

---

Tests are now set to omit the statistics.

---

Adds an Information_schema table, "profiling" for access to 
"show profile" data.
---
Merge zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-community-3--bug24795
into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-community
---
Fix merge problems.
---
Fixed one bug in the query_source being NULL.  

Updated test results.
---
Include more thorough profiling tests.

Improve support for prepared statements.

Use session-specific query IDs, starting at zero.
---
Selecting from I_S.profiling is no longer quashed in profiling, as
requested by Giuseppe.

Limit the size of captured query text.

No longer log queries that are zero length.


BitKeeper/deleted/.del-profile.result:
  Rename: mysql-test/r/profile.result -> BitKeeper/deleted/.del-profile.result
BitKeeper/deleted/.del-profile.test:
  Rename: mysql-test/t/profile.test -> BitKeeper/deleted/.del-profile.test
BitKeeper/deleted/.del-sql_profile.cc:
  Rename: sql/sql_profile.cc -> BitKeeper/deleted/.del-sql_profile.cc
BitKeeper/deleted/.del-sql_profile.h:
  Rename: sql/sql_profile.h -> BitKeeper/deleted/.del-sql_profile.h
configure.in:
  Add a configure-time option to enable/disable query profiling.  The
  default is enabled.
include/my_dbug.h:
  
  
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
myisam/mi_open.c:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
mysql-test/r/information_schema.result:
  Updated (re-recorded) tests that I missed somehow.  I verified these
  for correctness.
mysql-test/r/information_schema_db.result:
  Updated test results I missed.
mysql-test/r/mysqlshow.result:
  Fix merge problems.
ndb/src/ndbapi/DictCache.cpp:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
sql/ha_archive.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/ha_berkeley.cc:
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/ha_myisam.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/ha_myisammrg.cc:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
sql/ha_ndbcluster.cc:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
sql/item_cmpfunc.cc:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
sql/item_func.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/lock.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/log_event.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/mysql_priv.h:
  Use 64-bit constants for the 64-bit bit field.
  
  Add a new option bit for whether profiling is active or not.
sql/mysqld.cc:
  Add semicolon to DBUG statement.
  
  Add a new system variable and set it.
  ---
  Set the minimum, which is zero and not 50.
sql/repl_failsafe.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/set_var.cc:
  Make a new system global variable and session variable, to determine
  behavior of profiling.	
  ---
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/set_var.h:
  The THD::options bit field is ulonglong, not ulong.
sql/slave.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
  ---
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/sp_head.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/sql_base.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
  ---
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/sql_cache.cc:
  DBUG_* statements should be syntactically equivalent to a single 
  statement.
  ---
  Fix merge problems.
sql/sql_class.cc:
  Insert a pointer to the current thread in the profiling code.
  ---
  Manual merge, undoing first patch.
  ---
  Fix merge problems.
sql/sql_class.h:
  Create a new system variable, profiling_history_size, and add a 
  member to THD to hold profiling information about this thread's 
  execution.
  ---
  Manual merge, undoing first patch.
sql/sql_delete.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
  ---
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/sql_insert.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
  ---
  Fix merge problems.
sql/sql_lex.cc:
  Initialize profiling options to empty.
  ---
  Manual merge, undoing first patch.
sql/sql_lex.h:
  Add info to the lexer object so that we can hold data that comes from
  parsing statements.
  
  Reuse memory addresses of uints that can't occur in the same state-
  ment.
  
  This is dangerous because it involves knowledge of what symbols are 
  never used together, which is information stored obliquely in another
  file.
  ---
  Manual merge, undoing first patch.
sql/sql_parse.cc:
  Add hooks to the parser to jump to profiling code.
  
  If profiling is not present, then return an error message upon being
  used.
  ---
  Manual merge, undoing first patch.
  ---
  Fix merge problems.
  ---
  Include patch backported to 5.0-global.
  
  THD::options is a ulonglong, not ulong.
sql/sql_prepare.cc:
  From prepared statement execution, set the query source in the 
  profiler, as we can't get it from  thd .
  ---
  Make it less expensive to limit the size of the queries.
sql/sql_repl.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/sql_select.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
  ---
  Fix merge problems.
sql/sql_show.cc:
  Abstract setting thread-info into a function or macro.
  
  Also, remove "static" qualification on schema_table_store_record()
  so that external functions may use it.
  ---
  Manual merge, undoing first patch.
sql/sql_table.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/sql_update.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/sql_view.cc:
  Abstract setting thread-info into a function or macro.
  ---
  Manual merge, undoing first patch.
sql/sql_yacc.yy:
  Add new lexer symbols and insert new grammatical rules necessary to 
  retreive profiling information.
  ---
  Manual merge, undoing first patch.
  ---
  Fix merge problems.
sql/table.h:
  Add enum item for query profiling.
BitKeeper/deleted/.del-profiling-master.opt:
  New BitKeeper file ``mysql-test/t/profiling-master.opt''
mysql-test/r/profiling.result:
  New BitKeeper file ``mysql-test/r/profiling.result''
  ---
  Include more verbose that describes the queries so far.
  
  Include Giuseppe's tests.
  ---
  Selecting from I_S.profiling is no longer quashed in profiling, as
  requested by Giuseppe.
mysql-test/t/profiling.test:
  New BitKeeper file ``mysql-test/t/profiling.test''
  ---
  Include more verbose that describes the queries so far.
  
  Include Giuseppe's tests.
  ---
  Selecting from I_S.profiling is no longer quashed in profiling, as
  requested by Giuseppe.
sql/sql_profile.cc:
  New BitKeeper file ``sql/sql_profile.cc''
  ---
  If query_source is NULL, as can sometimes happen, then don't try
  to copy that memory.
  ---
  Make each new session use its own numbering of query_ids, and not
  show the global-pool numbers to the user.
  
  Provide a way for prepared statements to set the query_source.
  ---
  Selecting from I_S.profiling is no longer quashed in profiling, as
  requested by Giuseppe.
  
  Limit the size of captured query text.
  
  No longer log queries that are zero length.
sql/sql_profile.h:
  New BitKeeper file ``sql/sql_profile.h''
  ---
  Make each new session use its own numbering of query_ids, and not
  show the global-pool numbers to the user.
  
  Provide a way for prepared statements to set the query_source.
  ---
  Make it less expensive to limit the size of the queries.

1 files changed, 365 insertions, 0 deletions

diff --git a/mysql-test/r/profiling.result b/mysql-test/r/profiling.result
new file mode 100644
index 00000000000..f8aa060eee4
--- /dev/null
+++ b/mysql-test/r/profiling.result
@@ -0,0 +1,365 @@
+show session variables like 'profil%';
+Variable_name	Value
+profiling	OFF
+profiling_history_size	15
+select @@profiling;
+@@profiling
+0
+set global profiling = ON;
+ERROR HY000: Variable 'profiling' is a SESSION variable and can't be used with SET GLOBAL
+set global profiling_history_size=100;
+show global variables like 'profil%';
+Variable_name	Value
+profiling	OFF
+profiling_history_size	100
+set session profiling = ON;
+set session profiling_history_size=30;
+show session variables like 'profil%';
+Variable_name	Value
+profiling	ON
+profiling_history_size	30
+select @@profiling;
+@@profiling
+1
+create table t1 (
+a int,
+b int
+);
+insert into t1 values (1,1), (2,null), (3, 4);
+insert into t1 values (5,1), (6,null), (7, 4);
+insert into t1 values (1,1), (2,null), (3, 4);
+insert into t1 values (5,1), (6,null), (7, 4);
+select max(x) from (select sum(a) as x from t1 group by b) as teeone;
+max(x)
+20
+insert into t1 select * from t1;
+select count(*) from t1;
+count(*)
+24
+insert into t1 select * from t1;
+insert into t1 select * from t1;
+insert into t1 select * from t1;
+select count(*) from t1;
+count(*)
+192
+insert into t1 select * from t1;
+insert into t1 select * from t1;
+insert into t1 select * from t1;
+select count(*) from t1;
+count(*)
+1536
+select sum(a) from t1;
+sum(a)
+6144
+select sum(a) from t1 group by b;
+sum(a)
+2048
+1536
+2560
+select sum(a) + sum(b) from t1 group by b;
+sum(a) + sum(b)
+NULL
+2048
+4608
+select max(x) from (select sum(a) as x from t1 group by b) as teeone;
+max(x)
+2560
+select '012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890' as big_string;
+big_string
+012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
+show profiles;
+Query_ID	Duration	Query
+0	#	set session profiling = ON
+1	#	set session profiling_history_size=30
+2	#	show session variables like 'profil%'
+3	#	select @@profiling
+4	#	create table t1 (
+a int,
+b int
+)
+5	#	insert into t1 values (1,1), (2,null), (3, 4)
+6	#	insert into t1 values (5,1), (6,null), (7, 4)
+7	#	insert into t1 values (1,1), (2,null), (3, 4)
+8	#	insert into t1 values (5,1), (6,null), (7, 4)
+9	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+10	#	insert into t1 select * from t1
+11	#	select count(*) from t1
+12	#	insert into t1 select * from t1
+13	#	insert into t1 select * from t1
+14	#	insert into t1 select * from t1
+15	#	select count(*) from t1
+16	#	insert into t1 select * from t1
+17	#	insert into t1 select * from t1
+18	#	insert into t1 select * from t1
+19	#	select count(*) from t1
+20	#	select sum(a) from t1
+21	#	select sum(a) from t1 group by b
+22	#	select sum(a) + sum(b) from t1 group by b
+23	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+24	#	select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
+show profile for query 15;
+show profile cpu for query 15;
+show profile cpu, block io for query 15;
+show profile cpu for query 9 limit 2 offset 2;
+show profile cpu for query 10 limit 0;
+show profile cpu for query 65534;
+show profile memory;
+show profile block io;
+show profile context switches;
+show profile page faults;
+show profile ipc;
+show profile swaps limit 1 offset 2;
+show profile source;
+show profile all for query 0 limit 0;
+show profile all for query 15;
+select * from information_schema.profiling;
+select query_id, state, duration from information_schema.profiling;
+select query_id, sum(duration) from information_schema.profiling group by query_id;
+select query_id, count(*) from information_schema.profiling group by query_id;
+select sum(duration) from information_schema.profiling;
+select query_id, count(*), sum(duration) from information_schema.profiling group by query_id;
+select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling;
+drop table if exists t1, t2, t3;
+Warnings:
+Note	1051	Unknown table 't2'
+Note	1051	Unknown table 't3'
+create table t1 (id int );
+create table t2 (id int not null);
+create table t3 (id int not null primary key);
+insert into t1 values (1), (2), (3);
+insert into t2 values (1), (2), (3);
+insert into t3 values (1), (2), (3);
+show profiles;
+Query_ID	Duration	Query
+10	#	insert into t1 select * from t1
+11	#	select count(*) from t1
+12	#	insert into t1 select * from t1
+13	#	insert into t1 select * from t1
+14	#	insert into t1 select * from t1
+15	#	select count(*) from t1
+16	#	insert into t1 select * from t1
+17	#	insert into t1 select * from t1
+18	#	insert into t1 select * from t1
+19	#	select count(*) from t1
+20	#	select sum(a) from t1
+21	#	select sum(a) from t1 group by b
+22	#	select sum(a) + sum(b) from t1 group by b
+23	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+24	#	select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
+25	#	select * from information_schema.profiling
+26	#	select query_id, state, duration from information_schema.profiling
+27	#	select query_id, sum(duration) from information_schema.profiling group by query_id
+28	#	select query_id, count(*) from information_schema.profiling group by query_id
+29	#	select sum(duration) from information_schema.profiling
+30	#	select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
+31	#	select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
+32	#	drop table if exists t1, t2, t3
+33	#	SHOW WARNINGS
+34	#	create table t1 (id int )
+35	#	create table t2 (id int not null)
+36	#	create table t3 (id int not null primary key)
+37	#	insert into t1 values (1), (2), (3)
+38	#	insert into t2 values (1), (2), (3)
+39	#	insert into t3 values (1), (2), (3)
+select * from t1;
+id
+1
+2
+3
+show profiles;
+Query_ID	Duration	Query
+11	#	select count(*) from t1
+12	#	insert into t1 select * from t1
+13	#	insert into t1 select * from t1
+14	#	insert into t1 select * from t1
+15	#	select count(*) from t1
+16	#	insert into t1 select * from t1
+17	#	insert into t1 select * from t1
+18	#	insert into t1 select * from t1
+19	#	select count(*) from t1
+20	#	select sum(a) from t1
+21	#	select sum(a) from t1 group by b
+22	#	select sum(a) + sum(b) from t1 group by b
+23	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+24	#	select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
+25	#	select * from information_schema.profiling
+26	#	select query_id, state, duration from information_schema.profiling
+27	#	select query_id, sum(duration) from information_schema.profiling group by query_id
+28	#	select query_id, count(*) from information_schema.profiling group by query_id
+29	#	select sum(duration) from information_schema.profiling
+30	#	select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
+31	#	select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
+32	#	drop table if exists t1, t2, t3
+33	#	SHOW WARNINGS
+34	#	create table t1 (id int )
+35	#	create table t2 (id int not null)
+36	#	create table t3 (id int not null primary key)
+37	#	insert into t1 values (1), (2), (3)
+38	#	insert into t2 values (1), (2), (3)
+39	#	insert into t3 values (1), (2), (3)
+40	#	select * from t1
+This ^^ should end in "select * from t1;\"
+delete from t1;
+insert into t1 values (1), (2), (3);
+insert into t1 values (1), (2), (3);
+select * from t1;
+id
+1
+2
+3
+1
+2
+3
+show profiles;
+Query_ID	Duration	Query
+15	#	select count(*) from t1
+16	#	insert into t1 select * from t1
+17	#	insert into t1 select * from t1
+18	#	insert into t1 select * from t1
+19	#	select count(*) from t1
+20	#	select sum(a) from t1
+21	#	select sum(a) from t1 group by b
+22	#	select sum(a) + sum(b) from t1 group by b
+23	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+24	#	select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
+25	#	select * from information_schema.profiling
+26	#	select query_id, state, duration from information_schema.profiling
+27	#	select query_id, sum(duration) from information_schema.profiling group by query_id
+28	#	select query_id, count(*) from information_schema.profiling group by query_id
+29	#	select sum(duration) from information_schema.profiling
+30	#	select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
+31	#	select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
+32	#	drop table if exists t1, t2, t3
+33	#	SHOW WARNINGS
+34	#	create table t1 (id int )
+35	#	create table t2 (id int not null)
+36	#	create table t3 (id int not null primary key)
+37	#	insert into t1 values (1), (2), (3)
+38	#	insert into t2 values (1), (2), (3)
+39	#	insert into t3 values (1), (2), (3)
+40	#	select * from t1
+41	#	delete from t1
+42	#	insert into t1 values (1), (2), (3)
+43	#	insert into t1 values (1), (2), (3)
+44	#	select * from t1
+set session profiling = OFF;
+select sum(id) from t1;
+sum(id)
+12
+show profiles;
+Query_ID	Duration	Query
+16	#	insert into t1 select * from t1
+17	#	insert into t1 select * from t1
+18	#	insert into t1 select * from t1
+19	#	select count(*) from t1
+20	#	select sum(a) from t1
+21	#	select sum(a) from t1 group by b
+22	#	select sum(a) + sum(b) from t1 group by b
+23	#	select max(x) from (select sum(a) as x from t1 group by b) as teeone
+24	#	select '0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345
+25	#	select * from information_schema.profiling
+26	#	select query_id, state, duration from information_schema.profiling
+27	#	select query_id, sum(duration) from information_schema.profiling group by query_id
+28	#	select query_id, count(*) from information_schema.profiling group by query_id
+29	#	select sum(duration) from information_schema.profiling
+30	#	select query_id, count(*), sum(duration) from information_schema.profiling group by query_id
+31	#	select CPU_user, CPU_system, Context_voluntary, Context_involuntary, Block_ops_in, Block_ops_out, Messages_sent, Messages_received, Page_faults_major, Page_faults_minor, Swaps, Source_function, Source_file, Source_line from information_schema.profiling
+32	#	drop table if exists t1, t2, t3
+33	#	SHOW WARNINGS
+34	#	create table t1 (id int )
+35	#	create table t2 (id int not null)
+36	#	create table t3 (id int not null primary key)
+37	#	insert into t1 values (1), (2), (3)
+38	#	insert into t2 values (1), (2), (3)
+39	#	insert into t3 values (1), (2), (3)
+40	#	select * from t1
+41	#	delete from t1
+42	#	insert into t1 values (1), (2), (3)
+43	#	insert into t1 values (1), (2), (3)
+44	#	select * from t1
+45	#	set session profiling = OFF
+set session profiling = ON;
+select @@profiling;
+@@profiling
+1
+create function f1() returns varchar(50) return 'hello';
+select @@profiling;
+@@profiling
+1
+select * from t1 where id <> f1();
+id
+1
+2
+3
+1
+2
+3
+select @@profiling;
+@@profiling
+1
+set session profiling = ON;
+drop table if exists t2;
+create table t2 (id int not null);
+create trigger t2_bi before insert on t2 for each row set @x=0;
+select @@profiling;
+@@profiling
+1
+insert into t2 values (1), (2), (3);
+select @@profiling;
+@@profiling
+1
+set session profiling = ON;
+drop table if exists t1, t2;
+create table t1 (id int not null primary key);
+create table t2 (id int not null primary key, id1 int not null);
+select @@profiling;
+@@profiling
+1
+alter table t2 add foreign key (id1) references t1 (id) on delete cascade;
+select @@profiling;
+@@profiling
+1
+lock table t1 write;
+select @@profiling;
+@@profiling
+1
+unlock table;
+select @@profiling;
+@@profiling
+1
+set autocommit=0;
+select @@profiling, @@autocommit;
+@@profiling	@@autocommit
+1	0
+begin;
+select @@profiling;
+@@profiling
+1
+insert into t1 values (1);
+insert into t2 values (1,1);
+testing referential integrity cascade
+delete from t1 where id = 1;
+select @@profiling;
+@@profiling
+1
+testing rollback
+rollback;
+select @@profiling;
+@@profiling
+1
+testing commit
+begin;
+select @@profiling;
+@@profiling
+1
+commit;
+select @@profiling;
+@@profiling
+1
+drop table if exists t1, t2, t3;
+drop view if exists v1;
+Warnings:
+Note	1051	Unknown table 'test.v1'
+drop function if exists f1;
+set session profiling = OFF;
+End of 5.0 tests