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MDEV-14645: AS OF TIMESTAMP is misused as TRX_ID

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Remove 1668efb722 that introduced a special magic
behavior for UNIX_TIMESTAMP() in the AS OF context
This commit is contained in:
Sergei Golubchik
2018-02-22 01:24:02 +01:00
parent 33366b1098
commit f3088112cb
11 changed files with 10 additions and 119 deletions
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4
mysql-test/suite/versioning/r/derived.result
View File

@ -211,12 +211,12 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Query A:
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t1`.`row_start` <= <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t2`.`row_end` > <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t2`.`row_start` <= <cache>(cast(current_timestamp(6) as datetime(6)))
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t2`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6))
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Query B:
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t1`.`row_start` <= <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t2`.`row_end` > <cache>(cast(current_timestamp(6) as datetime(6))) and `test`.`t2`.`row_start` <= <cache>(cast(current_timestamp(6) as datetime(6)))
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t2`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6))
Fine result: queries A and B are equal.
## LEFT JOIN: t1, t2 versioned
select * from (

6
mysql-test/suite/versioning/r/select.result
View File

@ -153,21 +153,21 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`x` AS `IJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t1`.`row_start` <= <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_start` <= <cache>(cast(@`t0` as datetime(6)))
Note 1003 select `test`.`t1`.`x` AS `IJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0` and `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0`
explain extended select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
for system_time as of timestamp @t0 as t;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`x` AS `LJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL left join `test`.`t2` FOR SYSTEM_TIME ALL on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t1`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t1`.`row_start` <= <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_start` <= <cache>(cast(@`t0` as datetime(6)))) where 1
Note 1003 select `test`.`t1`.`x` AS `LJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL left join `test`.`t2` FOR SYSTEM_TIME ALL on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0` and `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0`) where 1
explain extended select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
for system_time as of timestamp @t0 as t;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`x` AS `RJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t2` FOR SYSTEM_TIME ALL left join `test`.`t1` FOR SYSTEM_TIME ALL on(`test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t1`.`row_start` <= <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_end` > <cache>(cast(@`t0` as datetime(6))) and `test`.`t2`.`row_start` <= <cache>(cast(@`t0` as datetime(6)))) where 1
Note 1003 select `test`.`t1`.`x` AS `RJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t2` FOR SYSTEM_TIME ALL left join `test`.`t1` FOR SYSTEM_TIME ALL on(`test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0` and `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0`) where 1
select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
for system_time as of timestamp @t0 as t;
IJ2_x1 y1 x2 y2

1
mysql-test/suite/versioning/t/select.test
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@ -226,7 +226,6 @@ select x from t1 for system_time as of transaction @trx_start;
select x from t1 for system_time as of @ts;
select x from t1 for system_time as of @trx_start;
--echo ### Issue #365, bug 4 (related to #226, optimized fields)
create or replace table t1 (i int, b int) with system versioning;
insert into t1 values (0, 0), (0, 0);

25
sql/item_func.h
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@ -1005,31 +1005,6 @@ public:
};
class Item_longlong_typecast :public Item_int_func
{
public:
Item_longlong_typecast(THD *thd, Item *a): Item_int_func(thd, a)
{
}
const char *func_name() const { return "cast_as_longlong"; }
const char *cast_type() const { return "longlong"; }
const Type_handler *type_handler() const { return &type_handler_longlong; }
longlong val_int()
{
return args[0]->val_int();
}
void fix_length_and_dec_generic() {}
void fix_length_and_dec()
{
args[0]->type_handler()->Item_longlong_typecast_fix_length_and_dec(this);
}
bool need_parentheses_in_default() { return true; }
Item *get_copy(THD *thd)
{ return get_item_copy<Item_longlong_typecast>(thd, this); }
};
class Item_func_additive_op :public Item_num_op
{
public:

21
sql/item_timefunc.cc
View File

@ -2642,27 +2642,6 @@ bool Item_datetime_typecast::get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date)
}
void Item_datetime_from_unixtime_typecast::fix_length_and_dec()
{
Item_datetime_typecast::fix_length_and_dec();
switch (args[0]->result_type())
{
case INT_RESULT:
case REAL_RESULT:
case DECIMAL_RESULT:
{
Query_arena_stmt on_stmt_arena(thd);
Item_func_from_unixtime *a= new (thd->mem_root) Item_func_from_unixtime(thd, args[0]);
a->fix_length_and_dec();
args[0]= a;
break;
}
default:;
}
}
/**
MAKEDATE(a,b) is a date function that creates a date value
from a year and day value.

14
sql/item_timefunc.h
View File

@ -1192,20 +1192,6 @@ public:
};
class Item_datetime_from_unixtime_typecast :public Item_datetime_typecast
{
THD *thd;
public:
Item_datetime_from_unixtime_typecast(THD *_thd, Item *a, uint dec_arg):
Item_datetime_typecast(_thd, a, dec_arg), thd(_thd) {}
const char *func_name() const { return "cast_as_datetime_from_unixtime"; }
const char *cast_type() const { return "datetime"; }
void fix_length_and_dec();
Item *get_copy(THD *thd)
{ return get_item_copy<Item_datetime_from_unixtime_typecast>(thd, this); }
};
class Item_func_makedate :public Item_datefunc
{
bool check_arguments() const

24
sql/sql_select.cc
View File

@ -867,28 +867,14 @@ int SELECT_LEX::vers_setup_conds(THD *thd, TABLE_LIST *tables, COND **where_expr
TABLE *t= table->table;
if (t->versioned(VERS_TIMESTAMP))
{
if (vers_conditions)
{
vers_conditions.start.add_typecast(thd, t->s->versioned);
vers_conditions.end.add_typecast(thd, t->s->versioned);
}
MYSQL_TIME max_time;
switch (vers_conditions.type)
{
case SYSTEM_TIME_UNSPECIFIED:
if (t->vers_start_field()->real_type() != MYSQL_TYPE_LONGLONG)
{
MYSQL_TIME max_time;
thd->variables.time_zone->gmt_sec_to_TIME(&max_time, TIMESTAMP_MAX_VALUE);
max_time.second_part= TIME_MAX_SECOND_PART;
curr= newx Item_datetime_literal(thd, &max_time,
TIME_SECOND_PART_DIGITS);
cond1= newx Item_func_eq(thd, row_end, curr);
}
else
{
curr= newx Item_int(thd, ULONGLONG_MAX);
cond1= newx Item_func_eq(thd, row_end, curr);
}
thd->variables.time_zone->gmt_sec_to_TIME(&max_time, TIMESTAMP_MAX_VALUE);
max_time.second_part= TIME_MAX_SECOND_PART;
curr= newx Item_datetime_literal(thd, &max_time, TIME_SECOND_PART_DIGITS);
cond1= newx Item_func_eq(thd, row_end, curr);
cond1= or_items(thd, cond1, newx Item_func_isnull(thd, row_end));
break;
case SYSTEM_TIME_AS_OF:

8
sql/sql_type.cc
View File

@ -4590,14 +4590,6 @@ bool Type_handler::
}
bool Type_handler::
Item_longlong_typecast_fix_length_and_dec(Item_longlong_typecast *item) const
{
item->fix_length_and_dec_generic();
return false;
}
#ifdef HAVE_SPATIAL
bool Type_handler_geometry::

3
sql/sql_type.h
View File

@ -55,7 +55,6 @@ class Item_char_typecast;
class Item_time_typecast;
class Item_date_typecast;
class Item_datetime_typecast;
class Item_longlong_typecast;
class Item_func_plus;
class Item_func_minus;
class Item_func_mul;
@ -1332,8 +1331,6 @@ public:
Item_date_typecast_fix_length_and_dec(Item_date_typecast *item) const;
virtual bool
Item_datetime_typecast_fix_length_and_dec(Item_datetime_typecast *item) const;
virtual bool
Item_longlong_typecast_fix_length_and_dec(Item_longlong_typecast *item) const;
virtual bool
Item_func_plus_fix_length_and_dec(Item_func_plus *func) const= 0;

22
sql/table.cc
View File

@ -8910,28 +8910,6 @@ void Vers_history_point::fix_item()
item->decimals= 6;
}
void Vers_history_point::add_typecast(THD *thd, enum vers_sys_type_t defunit)
{
if (item)
{
if (!unit)
unit= defunit;
switch (unit)
{
case VERS_TIMESTAMP:
item= new (thd->mem_root) Item_datetime_from_unixtime_typecast(
thd, item, MAX_DATETIME_PRECISION);
break;
case VERS_TRX_ID:
item= new (thd->mem_root) Item_longlong_typecast(thd, item);
break;
default:
DBUG_ASSERT(0);
break;
}
}
}
void Vers_history_point::print(String *str, enum_query_type query_type,
const char *prefix, size_t plen)
{

1
sql/table.h
View File

@ -1840,7 +1840,6 @@ public:
void empty() { unit= VERS_UNDEFINED; item= NULL; }
void print(String *str, enum_query_type, const char *prefix, size_t plen);
void resolve_unit(bool timestamps_only);
void add_typecast(THD *thd, enum vers_sys_type_t defunit);
};
struct vers_select_conds_t