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Fix null pointer handling in array iteration #2313

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Fix null pointer handling in array iteration #2313

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11 changes: 2 additions & 9 deletions src/backend/utils/adt/agtype.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7500,19 +7500,12 @@ Datum age_tostringlist(PG_FUNCTION_ARGS)
/* TODO: check element's type, it's value, and convert it to string if possible. */
elem = get_ith_agtype_value_from_container(&agt_arg->root, i);
string_elem.type = AGTV_STRING;
enum agtype_value_type elem_type = elem ? elem->type : AGTV_NULL;

switch (elem->type)
switch (elem_type)
{
case AGTV_STRING:

if(!elem)
{
string_elem.type = AGTV_NULL;

agis_result.res = push_agtype_value(&agis_result.parse_state,
WAGT_ELEM, &string_elem);
}

string_elem.val.string.val = elem->val.string.val;
string_elem.val.string.len = elem->val.string.len;

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