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MDEV-27412: JSON_TABLE doesn't properly unquote strings

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Analysis:
The value gets appended as string instead of unescaped json value

Fix:
Append the value of json in a temporary string and then store it in the
field instead of directly storing as string.
This commit is contained in:
Rucha Deodhar 2024-07-23 16:09:10 +05:30
parent 6715e4dfe1
commit 753e7d6d7c
5 changed files with 28 additions and 2 deletions
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9
mysql-test/main/func_json.result
View file

@ -1757,5 +1757,14 @@ JSON_INSERT(JSON_OBJECT(l1, l2, l3, l4), '$.k3', 'v3') JSON_SET(JSON_OBJECT(l1,
{"k1": "v1", "k2": "v2", "k3": "v3"} {"k1": "v1", "k2": "new v2"} {"k1": "v1", "k2": "new v2"}
DROP TABLE t;
#
# MDEV-27412: JSON_TABLE doesn't properly unquote strings
#
SET @data = '[{"Data": "<root language=\\"de\\"></root>"}]';
SELECT
data
FROM JSON_TABLE (@data, '$[*]' COLUMNS (data text PATH '$.Data')) AS t;
data
<root language="de"></root>
#
# End of 10.6 tests
#

12
mysql-test/main/func_json.test
View file

@ -1189,6 +1189,18 @@ SELECT JSON_ARRAY_APPEND(JSON_ARRAY(l1, l2, l3, l4), '$[0]', 'k3'), JSON_ARRAY_I
SELECT JSON_INSERT(JSON_OBJECT(l1, l2, l3, l4), '$.k3', 'v3'),JSON_SET(JSON_OBJECT(l1, l2, l3, l4), '$.k2', 'new v2'),JSON_REPLACE(JSON_OBJECT(l1, l2, l3, l4), '$.k2', 'new v2') from t;
DROP TABLE t;
--echo #
--echo # MDEV-27412: JSON_TABLE doesn't properly unquote strings
--echo #
SET @data = '[{"Data": "<root language=\\"de\\"></root>"}]';
SELECT
data
FROM JSON_TABLE (@data, '$[*]' COLUMNS (data text PATH '$.Data')) AS t;
--echo #
--echo # End of 10.6 tests
--echo #

2
sql/item_func.h
View file

@ -35,6 +35,8 @@ extern "C" /* Bug in BSDI include file */
#include <cmath>
extern int st_append_json(String *s,
CHARSET_INFO *json_cs, const uchar *js, uint js_len);
class Item_func :public Item_func_or_sum
{
void sync_with_sum_func_and_with_field(List<Item> &list);

2
sql/item_jsonfunc.cc
View file

@ -79,7 +79,7 @@ static inline bool append_simple(String *s, const uchar *a, size_t a_len)
Appends JSON string to the String object taking charsets in
consideration.
*/
static int st_append_json(String *s,
int st_append_json(String *s,
CHARSET_INFO *json_cs, const uchar *js, uint js_len)
{
int str_len= js_len * s->charset()->mbmaxlen;

5
sql/json_table.cc
View file

@ -380,6 +380,8 @@ int ha_json_table::rnd_init(bool scan)
static void store_json_in_field(Field *f, const json_engine_t *je)
{
String res_tmp("", 0, je->s.cs);
switch (je->value_type)
{
case JSON_VALUE_NULL:
@ -400,7 +402,8 @@ static void store_json_in_field(Field *f, const json_engine_t *je)
default:
break;
};
f->store((const char *) je->value, (uint32) je->value_len, je->s.cs);
st_append_json(&res_tmp, je->s.cs, je->value, je->value_len);
f->store((const char *) res_tmp.ptr(), (uint32) res_tmp.length(), je->s.cs);
}