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MDEV-18943: Group Concat with limit not working with views

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Adjusted the Item_func_group_concat::print function to take into account
limit if present with GROUP_CONCAT
This commit is contained in:
Varun Gupta
2019-05-02 14:38:43 +05:30
parent 5182348316
commit 879878e43d
3 changed files with 39 additions and 1 deletions
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14
mysql-test/main/func_gconcat.result
View File

@ -1378,5 +1378,19 @@ group_concat(a,b limit ?)
1a,1b,2x,2y
drop table t2;
#
# MDEV-18943: Group Concat with limit not working with views
#
create table t1 (a int, b varchar(10));
insert into t1 values(1,'a'),(1,'b'),(NULL,'c'),(2,'x'),(2,'y');
select group_concat(a,b limit 2) from t1;
group_concat(a,b limit 2)
1a,1b
create view v1 as select group_concat(a,b limit 2) from t1;
select * from v1;
group_concat(a,b limit 2)
1a,1b
drop view v1;
drop table t1;
#
# End of 10.3 tests
#

12
mysql-test/main/func_gconcat.test
View File

@ -985,6 +985,18 @@ prepare STMT from 'select group_concat(a,b limit ?) from t2';
execute STMT using @x;
drop table t2;
--echo #
--echo # MDEV-18943: Group Concat with limit not working with views
--echo #
create table t1 (a int, b varchar(10));
insert into t1 values(1,'a'),(1,'b'),(NULL,'c'),(2,'x'),(2,'y');
select group_concat(a,b limit 2) from t1;
create view v1 as select group_concat(a,b limit 2) from t1;
select * from v1;
drop view v1;
drop table t1;
--echo #
--echo # End of 10.3 tests
--echo #

14
sql/item_sum.cc
View File

@ -4172,7 +4172,19 @@ void Item_func_group_concat::print(String *str, enum_query_type query_type)
}
str->append(STRING_WITH_LEN(" separator \'"));
str->append_for_single_quote(separator->ptr(), separator->length());
str->append(STRING_WITH_LEN("\')"));
str->append(STRING_WITH_LEN("\'"));
if (limit_clause)
{
str->append(STRING_WITH_LEN(" limit "));
if (offset_limit)
{
offset_limit->print(str, query_type);
str->append(',');
}
row_limit->print(str, query_type);
}
str->append(STRING_WITH_LEN(")"));
}