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MDEV-27151: JSON_VALUE() does not parse NULL properties properly

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Analysis: JSON_VALUE() returns "null" string instead of NULL pointer.
Fix: When the type is JSON_VALUE_NULL (which is also a scalar) set
null_value to true and return 0 instead of returning string.
This commit is contained in:
Rucha Deodhar
2022-08-01 19:39:09 +05:30
parent d7ba72ea9b
commit d48428e99a
3 changed files with 52 additions and 1 deletions
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7
sql/item_jsonfunc.cc
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@ -619,6 +619,12 @@ continue_search:
if (json_read_value(&je))
goto err_return;
if (je.value_type == JSON_VALUE_NULL)
{
null_value= 1;
return NULL;
}
if (unlikely(check_and_get_value(&je, str, &error)))
{
if (error)
@ -1111,7 +1117,6 @@ my_decimal *Item_func_json_extract::val_decimal(my_decimal *to)
case JSON_VALUE_OBJECT:
case JSON_VALUE_ARRAY:
case JSON_VALUE_FALSE:
// TODO: fix: NULL should be NULL
case JSON_VALUE_NULL:
int2my_decimal(E_DEC_FATAL_ERROR, 0, false/*unsigned_flag*/, to);
return to;