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Merge tulin@bk-internal.mysql.com:/home/bk/mysql-5.1-new

Browse source 
into  poseidon.ndb.mysql.com:/home/tomas/mysql-5.1-new
This commit is contained in:
tomas@poseidon.ndb.mysql.com 2006-04-26 01:13:16 +02:00
commit 0e8ccc1bee
17 changed files with 266 additions and 77 deletions
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2
mysql-test/mysql-test-run.pl
View file

@ -3580,7 +3580,7 @@ sub valgrind_arguments {
if ( $opt_valgrind_options )
{
mtr_add_arg($args, split(' ', $opt_valgrind_options));
mtr_add_arg($args, '%s', $_) for (split(' ', $opt_valgrind_options));
}

8
mysql-test/r/case.result
View file

@ -175,6 +175,14 @@ SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
case+union+test
case+union+test
nobug
create table t1(a float, b int default 3);
insert into t1 (a) values (2), (11), (8);
select min(a), min(case when 1=1 then a else NULL end),
min(case when 1!=1 then NULL else a end)
from t1 where b=3 group by b;
min(a) min(case when 1=1 then a else NULL end) min(case when 1!=1 then NULL else a end)
2 2 2
drop table t1;
CREATE TABLE t1 (EMPNUM INT);
INSERT INTO t1 VALUES (0), (2);
CREATE TABLE t2 (EMPNUM DECIMAL (4, 2));

4
mysql-test/r/events_logs_tests.result
View file

@ -43,7 +43,7 @@ SLEEP(3)
0
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host query_time db sql_text
root[root] @ localhost [] 00:00:03 events_test SELECT SLEEP(3)
root[root] @ localhost [] SLEEPVAL events_test SELECT SLEEP(3)
TRUNCATE mysql.slow_log;
CREATE TABLE slow_event_test (slo_val tinyint, val tinyint);
"This won't go to the slow log"
@ -75,7 +75,7 @@ slo_val val
"Check slow log. Should see 1 row because 5 is over the threshold of 4 for GLOBAL, though under SESSION which is 10"
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
user_host query_time db sql_text
root[root] @ localhost [localhost] 00:00:05 events_test INSERT INTO slow_event_test SELECT @@long_query_time, SLEEP(5)
root[root] @ localhost [localhost] SLEEPVAL events_test INSERT INTO slow_event_test SELECT @@long_query_time, SLEEP(5)
DROP EVENT long_event2;
SET GLOBAL long_query_time =@old_global_long_query_time;
SET SESSION long_query_time =@old_session_long_query_time;

10
mysql-test/r/events_scheduling.result
View file

@ -4,7 +4,9 @@ CREATE TABLE table_1(a int);
CREATE TABLE table_2(a int);
CREATE TABLE table_3(a int);
CREATE TABLE table_4(a int);
CREATE TABLE T19170(s1 TIMESTAMP);
SET GLOBAL event_scheduler=1;
CREATE EVENT E19170 ON SCHEDULE EVERY 1 SECOND DO INSERT INTO T19170 VALUES(CURRENT_TIMESTAMP);
CREATE EVENT two_sec ON SCHEDULE EVERY 2 SECOND DO INSERT INTO table_1 VALUES(1);
CREATE EVENT start_n_end
ON SCHEDULE EVERY 1 SECOND
@ -29,8 +31,8 @@ DROP EVENT two_sec;
SELECT IF(TIME_TO_SEC(TIMEDIFF(ENDS,STARTS))=6, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
IF(TIME_TO_SEC(TIMEDIFF(ENDS,STARTS))=6, 'OK', 'ERROR')
OK
SELECT IF(LAST_EXECUTED-ENDS < 2, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
IF(LAST_EXECUTED-ENDS < 2, 'OK', 'ERROR')
SELECT IF(LAST_EXECUTED-ENDS < 3, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
IF(LAST_EXECUTED-ENDS < 3, 'OK', 'ERROR')
OK
DROP EVENT start_n_end;
"Already dropped because ended. Therefore an error."
@ -43,4 +45,8 @@ DROP TABLE table_1;
DROP TABLE table_2;
DROP TABLE table_3;
DROP TABLE table_4;
"Checking for multiple executions in one second, should not happen -> 0 as result"
SELECT COUNT(*) FROM (SELECT s1, COUNT(*) AS cnt FROM T19170 GROUP BY s1) AS tmp WHERE tmp.cnt > 1;
COUNT(*)
0
DROP DATABASE events_test;

7
mysql-test/r/func_compress.result
View file

@ -72,3 +72,10 @@ set @@max_allowed_packet=1048576*100;
select compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null;
compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null
0
create table t1(a blob);
insert into t1 values(NULL), (compress('a'));
select uncompress(a), uncompressed_length(a) from t1;
uncompress(a) uncompressed_length(a)
NULL NULL
a 1
drop table t1;

14
mysql-test/r/rpl_temporary.result
View file

@ -88,3 +88,17 @@ f
1
drop temporary table t4;
drop table t5;
set @session.pseudo_thread_id=100;
create temporary table t101 (id int);
create temporary table t102 (id int);
set @session.pseudo_thread_id=200;
create temporary table t201 (id int);
create temporary table `#not_user_table_prefixed_with_hash_sign_no_harm` (id int);
set @con1_id=connection_id();
kill @con1_id;
create table t1(f int);
insert into t1 values (1);
select * from t1 /* must be 1 */;
f
1
drop table t1;

11
mysql-test/t/case.test
View file

@ -122,6 +122,17 @@ SELECT 'case+union+test'
UNION
SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
#
# Bug #17896: problem with MIN(CASE...)
#
create table t1(a float, b int default 3);
insert into t1 (a) values (2), (11), (8);
select min(a), min(case when 1=1 then a else NULL end),
min(case when 1!=1 then NULL else a end)
from t1 where b=3 group by b;
drop table t1;
# End of 4.1 tests

2
mysql-test/t/disabled.def
View file

@ -12,8 +12,6 @@
events_bugs : BUG#17619 2006-02-21 andrey Race conditions
events_stress : BUG#17619 2006-02-21 andrey Race conditions
events : BUG#17619 2006-02-21 andrey Race conditions
events_scheduling : BUG#18958 2006-04-13 andrey Test case unstable
events_logs_tests : BUG#18953 2006-04-12 kent Test is randomly failing
ndb_autodiscover : BUG#18952 2006-02-16 jmiller Needs to be fixed w.r.t binlog
ndb_autodiscover2 : BUG#18952 2006-02-16 jmiller Needs to be fixed w.r.t binlog
#ndb_cache2 : BUG#18597 2006-03-28 brian simultaneous drop table and ndb statistics update triggers node failure

2
mysql-test/t/events_logs_tests.test
View file

@ -56,6 +56,7 @@ SET GLOBAL long_query_time=4;
SET SESSION long_query_time=2;
--echo "Check that logging is working"
SELECT SLEEP(3);
--replace_regex /00:00:0[3-5]/SLEEPVAL/
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
TRUNCATE mysql.slow_log;
CREATE TABLE slow_event_test (slo_val tinyint, val tinyint);
@ -79,6 +80,7 @@ CREATE EVENT long_event2 ON SCHEDULE EVERY 1 MINUTE DO INSERT INTO slow_event_te
--echo "Check our table. Should see 2 rows"
SELECT * FROM slow_event_test;
--echo "Check slow log. Should see 1 row because 5 is over the threshold of 4 for GLOBAL, though under SESSION which is 10"
--replace_regex /00:00:0[5-7]/SLEEPVAL/
SELECT user_host, query_time, db, sql_text FROM mysql.slow_log;
DROP EVENT long_event2;
SET GLOBAL long_query_time =@old_global_long_query_time;

6
mysql-test/t/events_scheduling.test
View file

@ -4,7 +4,9 @@ CREATE TABLE table_1(a int);
CREATE TABLE table_2(a int);
CREATE TABLE table_3(a int);
CREATE TABLE table_4(a int);
CREATE TABLE T19170(s1 TIMESTAMP);
SET GLOBAL event_scheduler=1;
CREATE EVENT E19170 ON SCHEDULE EVERY 1 SECOND DO INSERT INTO T19170 VALUES(CURRENT_TIMESTAMP);
CREATE EVENT two_sec ON SCHEDULE EVERY 2 SECOND DO INSERT INTO table_1 VALUES(1);
CREATE EVENT start_n_end
ON SCHEDULE EVERY 1 SECOND
@ -21,7 +23,7 @@ SELECT IF(SUM(a) > 0, 'OK', 'ERROR') FROM table_3;
SELECT IF(SUM(a) > 0, 'OK', 'ERROR') FROM table_4;
DROP EVENT two_sec;
SELECT IF(TIME_TO_SEC(TIMEDIFF(ENDS,STARTS))=6, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
SELECT IF(LAST_EXECUTED-ENDS < 2, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
SELECT IF(LAST_EXECUTED-ENDS < 3, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
DROP EVENT start_n_end;
--echo "Already dropped because ended. Therefore an error."
--error ER_EVENT_DOES_NOT_EXIST
@ -33,4 +35,6 @@ DROP TABLE table_1;
DROP TABLE table_2;
DROP TABLE table_3;
DROP TABLE table_4;
--echo "Checking for multiple executions in one second, should not happen -> 0 as result"
SELECT COUNT(*) FROM (SELECT s1, COUNT(*) AS cnt FROM T19170 GROUP BY s1) AS tmp WHERE tmp.cnt > 1;
DROP DATABASE events_test;

9
mysql-test/t/func_compress.test
View file

@ -47,4 +47,13 @@ set @@max_allowed_packet=1048576*100;
--replace_result "''" XXX "'1'" XXX
eval select compress(repeat('aaaaaaaaaa', IF('$LOW_MEMORY', 10, 10000000))) is null;
#
# Bug #18643: problem with null values
#
create table t1(a blob);
insert into t1 values(NULL), (compress('a'));
select uncompress(a), uncompressed_length(a) from t1;
drop table t1;
# End of 4.1 tests

30
mysql-test/t/rpl_temporary.test
View file

@ -131,6 +131,8 @@ drop table t1,t2;
create temporary table t3 (f int);
sync_with_master;
# The server will now close done
#
# Bug#17284 erroneous temp table cleanup on slave
#
@ -156,5 +158,31 @@ connection master;
drop temporary table t4;
drop table t5;
# The server will now close done
#
# BUG#17263 incorrect generation DROP temp tables
# Temporary tables of connection are dropped in batches
# where a batch correspond to pseudo_thread_id
# value was set up at the moment of temp table creation
#
connection con1;
set @session.pseudo_thread_id=100;
create temporary table t101 (id int);
create temporary table t102 (id int);
set @session.pseudo_thread_id=200;
create temporary table t201 (id int);
create temporary table `#not_user_table_prefixed_with_hash_sign_no_harm` (id int);
set @con1_id=connection_id();
kill @con1_id;
#now do something to show that slave is ok after DROP temp tables
connection master;
create table t1(f int);
insert into t1 values (1);
sync_slave_with_master;
#connection slave;
select * from t1 /* must be 1 */;
connection master;
drop table t1;
# End of 5.1 tests

31
sql/event_timed.cc
View file

@ -731,7 +731,9 @@ bool get_next_time(TIME *next, TIME *start, TIME *time_now, TIME *last_exec,
get the next exec if the modulus is not
*/
DBUG_PRINT("info", ("multiplier=%d", multiplier));
if (seconds_diff % seconds || (!seconds_diff && last_exec->year))
if (seconds_diff % seconds || (!seconds_diff && last_exec->year) ||
TIME_to_ulonglong_datetime(time_now) ==
TIME_to_ulonglong_datetime(last_exec))
++multiplier;
interval.second= seconds * multiplier;
DBUG_PRINT("info", ("multiplier=%u interval.second=%u", multiplier,
@ -893,16 +895,15 @@ Event_timed::compute_next_execution_time()
DBUG_PRINT("info", ("Both STARTS & ENDS are set"));
if (!last_executed.year)
{
DBUG_PRINT("info", ("Not executed so far. Execute NOW."));
execute_at= time_now;
execute_at_null= FALSE;
DBUG_PRINT("info", ("Not executed so far."));
}
else
{
TIME next_exec;
DBUG_PRINT("info", ("Executed at least once"));
if (get_next_time(&next_exec, &starts, &time_now, &last_executed,
if (get_next_time(&next_exec, &starts, &time_now,
last_executed.year? &last_executed:&starts,
expression, interval))
goto err;
@ -925,8 +926,9 @@ Event_timed::compute_next_execution_time()
}
goto ret;
}
else if (starts_null && ends_null)
else if (starts_null && ends_null)
{
/* starts is always set, so this is a dead branch !! */
DBUG_PRINT("info", ("Neither STARTS nor ENDS are set"));
/*
Both starts and m_ends are not set, so we schedule for the next
@ -961,25 +963,26 @@ Event_timed::compute_next_execution_time()
Hence schedule for starts + m_expression in case last_executed
is not set, otherwise to last_executed + m_expression
*/
if (last_executed.year)
if (!last_executed.year)
{
DBUG_PRINT("info", ("Not executed so far."));
}
{
TIME next_exec;
DBUG_PRINT("info", ("Executed at least once."));
if (get_next_time(&next_exec, &starts, &time_now, &last_executed,
if (get_next_time(&next_exec, &starts, &time_now,
last_executed.year? &last_executed:&starts,
expression, interval))
goto err;
execute_at= next_exec;
DBUG_PRINT("info",("Next[%llu]",TIME_to_ulonglong_datetime(&next_exec)));
}
else
{
DBUG_PRINT("info", ("Not executed so far. Execute at STARTS"));
execute_at= starts;
}
execute_at_null= FALSE;
}
else
{
/* this is a dead branch, because starts is always set !!! */
DBUG_PRINT("info", ("STARTS is not set. ENDS is set"));
/*
- m_ends is set

23
sql/item_cmpfunc.cc
View file

@ -41,10 +41,25 @@ static Item_result item_store_type(Item_result a,Item_result b)
static void agg_result_type(Item_result *type, Item **items, uint nitems)
{
uint i;
type[0]= items[0]->result_type();
for (i=1 ; i < nitems ; i++)
type[0]= item_store_type(type[0], items[i]->result_type());
Item **item, **item_end;
*type= STRING_RESULT;
/* Skip beginning NULL items */
for (item= items, item_end= item + nitems; item < item_end; item++)
{
if ((*item)->type() != Item::NULL_ITEM)
{
*type= (*item)->result_type();
item++;
break;
}
}
/* Combine result types. Note: NULL items don't affect the result */
for (; item < item_end; item++)
{
if ((*item)->type() != Item::NULL_ITEM)
*type= item_store_type(type[0], (*item)->result_type());
}
}

1
sql/item_strfunc.cc
View file

@ -2941,6 +2941,7 @@ String *Item_func_uncompress::val_str(String *str)
if (!res)
goto err;
null_value= 0;
if (res->is_empty())
return res;

167
sql/sql_base.cc
View file

@ -1167,16 +1167,26 @@ bool close_thread_table(THD *thd, TABLE **table_ptr)
}
/* close_temporary_tables' internal, 4 is due to uint4korr definition */
static inline uint tmpkeyval(THD *thd, TABLE *table)
{
return uint4korr(table->s->table_cache_key.str + table->s->table_cache_key.length - 4);
}
/*
Close all temporary tables created by 'CREATE TEMPORARY TABLE' for thread
creates one DROP TEMPORARY TABLE binlog event for each pseudo-thread
*/
void close_temporary_tables(THD *thd)
{
TABLE *table,*next;
char *query, *end;
uint query_buf_size;
bool found_user_tables = 0;
TABLE *next,
*prev_table /* prev link is not maintained in TABLE's double-linked list */,
*table;
char *query= (gptr) 0, *end;
uint query_buf_size, max_names_len;
bool found_user_tables;
if (!thd->temporary_tables)
return;
@ -1184,50 +1194,123 @@ void close_temporary_tables(THD *thd)
LINT_INIT(end);
query_buf_size= 50; // Enough for DROP ... TABLE IF EXISTS
for (table=thd->temporary_tables ; table ; table=table->next)
/*
insertion sort of temp tables by pseudo_thread_id to build ordered list
of sublists of equal pseudo_thread_id
*/
for (prev_table= thd->temporary_tables,
table= prev_table->next,
found_user_tables= (prev_table->s->table_name.str[0] != '#');
table;
prev_table= table, table= table->next)
{
TABLE *prev_sorted /* same as for prev_table */,
*sorted;
/*
We are going to add 4 ` around the db/table names, so 1 does not look
enough; indeed it is enough, because table->table_cache_key.length is
greater (by 8, because of server_id and thread_id) than db||table.
table not created directly by the user is moved to the tail.
Fixme/todo: nothing (I checked the manual) prevents user to create temp
with `#'
*/
query_buf_size+= table->s->table_cache_key.length+1;
}
if ((query = alloc_root(thd->mem_root, query_buf_size)))
// Better add "if exists", in case a RESET MASTER has been done
end=strmov(query, "DROP /*!40005 TEMPORARY */ TABLE IF EXISTS ");
for (table=thd->temporary_tables ; table ; table=next)
{
if (query) // we might be out of memory, but this is not fatal
if (table->s->table_name.str[0] == '#')
continue;
else
{
// skip temporary tables not created directly by the user
if (table->s->table_name.str[0] != '#')
found_user_tables = 1;
end= strxmov(end, "`",table->s->db.str, "`.`",
table->s->table_name.str, "`,", NullS);
found_user_tables = 1;
}
next=table->next;
close_temporary(table, 1, 1);
}
if (query && found_user_tables && mysql_bin_log.is_open() &&
!thd->current_stmt_binlog_row_based) // CREATE TEMP TABLE not binlogged if row-based
for (prev_sorted= NULL, sorted= thd->temporary_tables; sorted != table;
prev_sorted= sorted, sorted= sorted->next)
{
if (sorted->s->table_name.str[0] == '#' || tmpkeyval(thd, sorted) > tmpkeyval(thd, table))
{
/* move into the sorted part of the list from the unsorted */
prev_table->next= table->next;
table->next= sorted;
if (prev_sorted)
{
prev_sorted->next= table;
}
else
{
thd->temporary_tables= table;
}
table= prev_table;
break;
}
}
}
/*
calc query_buf_size as max per sublists, one sublist per pseudo thread id.
Also stop at first occurence of `#'-named table that starts
all implicitly created temp tables
*/
for (max_names_len= 0, table=thd->temporary_tables;
table && table->s->table_name.str[0] != '#';
table=table->next)
{
/* The -1 is to remove last ',' */
thd->clear_error();
Query_log_event qinfo(thd, query, (ulong)(end-query)-1, 0, FALSE);
/*
Imagine the thread had created a temp table, then was doing a SELECT, and
the SELECT was killed. Then it's not clever to mark the statement above
as "killed", because it's not really a statement updating data, and there
are 99.99% chances it will succeed on slave.
If a real update (one updating a persistent table) was killed on the
master, then this real update will be logged with error_code=killed,
rightfully causing the slave to stop.
*/
qinfo.error_code= 0;
mysql_bin_log.write(&qinfo);
uint tmp_names_len;
for (tmp_names_len= table->s->table_cache_key.length + 1;
table->next && table->s->table_name.str[0] != '#' &&
tmpkeyval(thd, table) == tmpkeyval(thd, table->next);
table=table->next)
{
/*
We are going to add 4 ` around the db/table names, so 1 might not look
enough; indeed it is enough, because table->s->table_cache_key.length is
greater (by 8, because of server_id and thread_id) than db||table.
*/
tmp_names_len += table->next->s->table_cache_key.length + 1;
}
if (tmp_names_len > max_names_len) max_names_len= tmp_names_len;
}
/* allocate */
if (found_user_tables && mysql_bin_log.is_open() &&
!thd->current_stmt_binlog_row_based &&
(query = alloc_root(thd->mem_root, query_buf_size+= max_names_len)))
// Better add "if exists", in case a RESET MASTER has been done
end= strmov(query, "DROP /*!40005 TEMPORARY */ TABLE IF EXISTS ");
/* scan sorted tmps to generate sequence of DROP */
for (table=thd->temporary_tables; table; table= next)
{
if (query // we might be out of memory, but this is not fatal
&& table->s->table_name.str[0] != '#')
{
char *end_cur;
/* Set pseudo_thread_id to be that of the processed table */
thd->variables.pseudo_thread_id= tmpkeyval(thd, table);
/* Loop forward through all tables within the sublist of
common pseudo_thread_id to create single DROP query */
for (end_cur= end;
table && table->s->table_name.str[0] != '#' &&
tmpkeyval(thd, table) == thd->variables.pseudo_thread_id;
table= next)
{
end_cur= strxmov(end_cur, "`", table->s->db.str, "`.`",
table->s->table_name.str, "`,", NullS);
next= table->next;
close_temporary(table, 1, 1);
}
thd->clear_error();
/* The -1 is to remove last ',' */
Query_log_event qinfo(thd, query, (ulong)(end_cur - query) - 1, 0, FALSE);
/*
Imagine the thread had created a temp table, then was doing a SELECT,
and the SELECT was killed. Then it's not clever to mark the statement
above as "killed", because it's not really a statement updating data,
and there are 99.99% chances it will succeed on slave. If a real update
(one updating a persistent table) was killed on the master, then this
real update will be logged with error_code=killed, rightfully causing
the slave to stop.
*/
qinfo.error_code= 0;
mysql_bin_log.write(&qinfo);
}
else
{
next= table->next;
close_temporary(table, 1, 1);
}
}
thd->temporary_tables=0;
}

16
storage/myisam/myisam_ftdump.c
View file

@ -34,20 +34,20 @@ static uint lengths[256];
static struct my_option my_long_options[] =
{
{"help", 'h', "Display help and exit.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"help", '?', "Synonym for -h.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"count", 'c', "Calculate per-word stats (counts and global weights).",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"dump", 'd', "Dump index (incl. data offsets and word weights).",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"length", 'l', "Report length distribution.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"stats", 's', "Report global stats.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"verbose", 'v', "Be verbose.",
(gptr*) &verbose, (gptr*) &verbose, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
{"count", 'c', "Calculate per-word stats (counts and global weights).",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"length", 'l', "Report length distribution.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"help", 'h', "Display help and exit.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{"help", '?', "Synonym for -h.",
0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
{ 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};