Github user sansanichfb commented on a diff in the pull request:
    --- Diff: src/bin/psql/describe.c ---
    @@ -4316,10 +4316,10 @@ describePxfTable(const char *profile, const char 
*pattern, bool verbose)
                if (verbose)
                        sourcefieldtype = PQgetvalue(res, i, 4);
    -                   total_fields = PQgetvalue(res, i, 5);
    +                   total_fields = atoi(PQgetvalue(res, i, 5));
    --- End diff --
    No, atoi() doesn't guarantee a positive value, it just takes char, assumes 
it's a int value and converts it to int value. The SQL `SELECT t.path, 
t.itemname, t.fieldname, t.fieldtype, sourcefieldtype, COUNT() OVER(PARTITION 
BY path, itemname) as total_fields FROM pxf_get_item_fields('Hive', '*') t` 
guarantees that total_fields will be >=0. I would say we could fix function 
pg_local_calloc so it should take only positive value.

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