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Fixed bug mdev-10868.

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There was no implementation of the virtual method print()
for the Item_window_func class. As a result for a view
containing window function an invalid view definition could
be written in the frm file. When a query that refers to
this view was executed a syntax error was reported.
This commit is contained in:
Igor Babaev
2016-09-29 01:15:00 -07:00
parent 6aeaebd8cf
commit 903f34c7a9
6 changed files with 253 additions and 2 deletions
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116
mysql-test/r/win.result
View File

@ -1779,7 +1779,7 @@ EXPLAIN
"query_block": {
"select_id": 1,
"filesort": {
"sort_key": "X",
"sort_key": "row_number() over ( order by t1.s1,t1.s2)",
"window_functions_computation": {
"sorts": {
"filesort": {
@ -2236,3 +2236,117 @@ sum(t.a) over (partition by t.b order by a) sqrt(ifnull((sum(t.a) over (partitio
3.0000000000 1.7320508075688772
0.0000000000 0
drop table t;
#
# MDEV-10868: view definitions with window functions
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk c
1 1
2 1
3 1
4 1
5 2
6 2
7 2
8 2
9 2
10 2
select pk, c, c/count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
pk c CNT
1 1 0.3333
2 1 0.2500
3 1 0.3333
4 1 0.5000
5 2 0.6667
6 2 0.5000
7 2 0.5000
8 2 0.5000
9 2 0.6667
10 2 1.0000
create view v1 as select pk, c, c/count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,(`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between 1 preceding and 2 following )) AS `CNT` from `t1` latin1 latin1_swedish_ci
select * from v1;
pk c CNT
1 1 0.3333
2 1 0.2500
3 1 0.3333
4 1 0.5000
5 2 0.6667
6 2 0.5000
7 2 0.5000
8 2 0.5000
9 2 0.6667
10 2 1.0000
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows between 1 preceding and 2 following);
pk c CNT
1 1 0.3333
2 1 0.2500
3 1 0.3333
4 1 0.5000
5 2 0.6667
6 2 0.5000
7 2 0.5000
8 2 0.5000
9 2 0.6667
10 2 1.0000
create view v2 as select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows between 1 preceding and 2 following);
show create view v2;
View Create View character_set_client collation_connection
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,(`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between 1 preceding and 2 following )) AS `CNT` from `t1` latin1 latin1_swedish_ci
select * from v2;
pk c CNT
1 1 0.3333
2 1 0.2500
3 1 0.3333
4 1 0.5000
5 2 0.6667
6 2 0.5000
7 2 0.5000
8 2 0.5000
9 2 0.6667
10 2 1.0000
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows unbounded preceding);
pk c CNT
1 1 1.0000
2 1 0.5000
3 1 0.3333
4 1 0.2500
5 2 2.0000
6 2 1.0000
7 2 0.6667
8 2 0.5000
9 2 0.4000
10 2 0.3333
create view v3 as select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows unbounded preceding);
show create view v3;
View Create View character_set_client collation_connection
v3 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v3` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,(`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between unbounded preceding and current row )) AS `CNT` from `t1` latin1 latin1_swedish_ci
select * from v3;
pk c CNT
1 1 1.0000
2 1 0.5000
3 1 0.3333
4 1 0.2500
5 2 2.0000
6 2 1.0000
7 2 0.6667
8 2 0.5000
9 2 0.4000
10 2 0.3333
drop view v1,v2,v3;
drop table t0,t1;

43
mysql-test/t/win.test
View File

@ -1373,3 +1373,46 @@ SELECT sum(t.a) over (partition by t.b order by a),
sqrt(ifnull((sum(t.a) over (partition by t.b order by a)), 0))
from t;
drop table t;
--echo #
--echo # MDEV-10868: view definitions with window functions
--echo #
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
let $q=
select pk, c, c/count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
eval $q;
eval create view v1 as $q;
show create view v1;
select * from v1;
let $q=
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows between 1 preceding and 2 following);
eval $q;
eval create view v2 as $q;
show create view v2;
select * from v2;
let $q=
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows unbounded preceding);
eval $q;
eval create view v3 as $q;
show create view v3;
select * from v3;
drop view v1,v2,v3;
drop table t0,t1;

7
sql/item_windowfunc.cc
View File

@ -446,3 +446,10 @@ void Item_sum_hybrid_simple::update_field()
{
DBUG_ASSERT(0);
}
void Item_window_func::print(String *str, enum_query_type query_type)
{
window_func()->print(str, query_type);
str->append(" over ");
window_spec->print(str, query_type);
}

2
sql/item_windowfunc.h
View File

@ -963,6 +963,8 @@ public:
bool resolve_window_name(THD *thd);
void print(String *str, enum_query_type query_type);
Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return 0; }
};

78
sql/sql_window.cc
View File

@ -61,6 +61,25 @@ Window_spec::check_window_names(List_iterator_fast<Window_spec> &it)
return false;
}
void
Window_spec::print(String *str, enum_query_type query_type)
{
str->append('(');
if (partition_list->first)
{
str->append(STRING_WITH_LEN(" partition by "));
st_select_lex::print_order(str, partition_list->first, query_type);
}
if (order_list->first)
{
str->append(STRING_WITH_LEN(" order by "));
st_select_lex::print_order(str, order_list->first, query_type);
}
if (window_frame)
window_frame->print(str, query_type);
str->append(')');
}
bool
Window_frame::check_frame_bounds()
{
@ -81,6 +100,65 @@ Window_frame::check_frame_bounds()
}
void
Window_frame::print(String *str, enum_query_type query_type)
{
switch (units) {
case UNITS_ROWS:
str->append(STRING_WITH_LEN(" rows "));
break;
case UNITS_RANGE: str->append(STRING_WITH_LEN(" range "));
}
str->append(STRING_WITH_LEN("between "));
top_bound->print(str, query_type);
str->append(STRING_WITH_LEN(" and "));
bottom_bound->print(str, query_type);
if (exclusion != EXCL_NONE)
{
str->append(STRING_WITH_LEN(" exclude "));
switch (exclusion) {
case EXCL_CURRENT_ROW:
str->append(STRING_WITH_LEN(" current row "));
break;
case EXCL_GROUP:
str->append(STRING_WITH_LEN(" group "));
break;
case EXCL_TIES:
str->append(STRING_WITH_LEN(" ties "));
break;
default:
;
}
}
}
void
Window_frame_bound::print(String *str, enum_query_type query_type)
{
if (precedence_type == CURRENT)
{
str->append(STRING_WITH_LEN(" current row "));
return;
}
if (is_unbounded())
str->append(STRING_WITH_LEN(" unbounded "));
else
offset->print(str ,query_type);
switch (precedence_type) {
case PRECEDING:
str->append(STRING_WITH_LEN(" preceding "));
break;
case FOLLOWING:
str->append(STRING_WITH_LEN(" following "));
break;
default:
DBUG_ASSERT(0);
}
}
/*
Setup window functions in a select
*/

7
sql/sql_window.h
View File

@ -45,6 +45,8 @@ public:
bool is_unbounded() { return offset == NULL; }
void print(String *str, enum_query_type query_type);
};
@ -84,6 +86,8 @@ public:
bool check_frame_bounds();
void print(String *str, enum_query_type query_type);
};
class Window_spec : public Sql_alloc
@ -125,6 +129,9 @@ class Window_spec : public Sql_alloc
{
*(partition_list->next)= NULL;
}
void print(String *str, enum_query_type query_type);
};
class Window_def : public Window_spec