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  1. MariaDB Server
  2. MDEV-28319

Assertion `cur_step->type & JSON_PATH_KEY' failed in json_find_path

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      SELECT * FROM JSON_TABLE('{"foo":{"bar":1},"qux":2}', '$' COLUMNS(c1 VARCHAR(8) PATH '$[0]', c2 CHAR(8) PATH '$.*.x')) AS js;
      

      10.9 abe97121

      mariadbd: /data/src/10.9/strings/json_lib.c:1406: json_find_path: Assertion `cur_step->type & JSON_PATH_KEY' failed.
      220415  0:21:35 [ERROR] mysqld got signal 6 ;
       
      #7  0x00007f1df4bc6662 in __GI___assert_fail (assertion=0x5583e5566768 "cur_step->type & JSON_PATH_KEY", file=0x5583e5566740 "/data/src/10.9/strings/json_lib.c", line=1406, function=0x5583e5566840 <__PRETTY_FUNCTION__.3> "json_find_path") at assert.c:101
      #8  0x00005583e4f20f87 in json_find_path (je=0x7f1deb57fff0, p=0x7f1dd4016e78, p_cur_step=0x7f1deb57fee0, array_counters=0x7f1deb57ff70) at /data/src/10.9/strings/json_lib.c:1406
      #9  0x00005583e453bcc1 in ha_json_table::fill_column_values (this=0x7f1dd42155e0, thd=0x7f1dd4000db8, buf=0x7f1dd4225bb0 "\375\377", pos=0x0) at /data/src/10.9/sql/json_table.cc:530
      #10 0x00005583e453b873 in ha_json_table::rnd_next (this=0x7f1dd42155e0, buf=0x7f1dd4225bb0 "\375\377") at /data/src/10.9/sql/json_table.cc:420
      #11 0x00005583e4617bcc in handler::ha_rnd_next (this=0x7f1dd42155e0, buf=0x7f1dd4225bb0 "\375\377") at /data/src/10.9/sql/handler.cc:3414
      #12 0x00005583e4124229 in rr_sequential (info=0x7f1dd4114230) at /data/src/10.9/sql/records.cc:519
      #13 0x00005583e410f62d in READ_RECORD::read_record (this=0x7f1dd4114230) at /data/src/10.9/sql/records.h:81
      #14 0x00005583e42f81e1 in join_init_read_record (tab=0x7f1dd4114168) at /data/src/10.9/sql/sql_select.cc:22089
      #15 0x00005583e42f5bac in sub_select (join=0x7f1dd40184b0, join_tab=0x7f1dd4114168, end_of_records=false) at /data/src/10.9/sql/sql_select.cc:21092
      #16 0x00005583e42f50be in do_select (join=0x7f1dd40184b0, procedure=0x0) at /data/src/10.9/sql/sql_select.cc:20640
      #17 0x00005583e42c8748 in JOIN::exec_inner (this=0x7f1dd40184b0) at /data/src/10.9/sql/sql_select.cc:4749
      #18 0x00005583e42c77bd in JOIN::exec (this=0x7f1dd40184b0) at /data/src/10.9/sql/sql_select.cc:4527
      #19 0x00005583e42c90ee in mysql_select (thd=0x7f1dd4000db8, tables=0x7f1dd4017370, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f1dd4018488, unit=0x7f1dd40051c8, select_lex=0x7f1dd40156d8) at /data/src/10.9/sql/sql_select.cc:5007
      #20 0x00005583e42b83e7 in handle_select (thd=0x7f1dd4000db8, lex=0x7f1dd40050f0, result=0x7f1dd4018488, setup_tables_done_option=0) at /data/src/10.9/sql/sql_select.cc:543
      #21 0x00005583e42613f5 in execute_sqlcom_select (thd=0x7f1dd4000db8, all_tables=0x7f1dd4017370) at /data/src/10.9/sql/sql_parse.cc:6268
      #22 0x00005583e4258702 in mysql_execute_command (thd=0x7f1dd4000db8, is_called_from_prepared_stmt=false) at /data/src/10.9/sql/sql_parse.cc:3959
      #23 0x00005583e4266177 in mysql_parse (thd=0x7f1dd4000db8, rawbuf=0x7f1dd4015580 "SELECT * FROM JSON_TABLE('{\"foo\":{\"bar\":1},\"qux\":2}', '$' COLUMNS(c1 VARCHAR(8) PATH '$[0]', c2 CHAR(8) PATH '$.*.x')) AS js", length=124, parser_state=0x7f1deb581500) at /data/src/10.9/sql/sql_parse.cc:8043
      #24 0x00005583e42527d8 in dispatch_command (command=COM_QUERY, thd=0x7f1dd4000db8, packet=0x7f1dd400b999 "", packet_length=124, blocking=true) at /data/src/10.9/sql/sql_parse.cc:1910
      #25 0x00005583e4251105 in do_command (thd=0x7f1dd4000db8, blocking=true) at /data/src/10.9/sql/sql_parse.cc:1407
      #26 0x00005583e4423e92 in do_handle_one_connection (connect=0x5583e88fac48, put_in_cache=true) at /data/src/10.9/sql/sql_connect.cc:1418
      #27 0x00005583e4423b31 in handle_one_connection (arg=0x5583e88fd2c8) at /data/src/10.9/sql/sql_connect.cc:1312
      #28 0x00005583e491d838 in pfs_spawn_thread (arg=0x5583e88fa7b8) at /data/src/10.9/storage/perfschema/pfs.cc:2201
      #29 0x00007f1df5090ea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #30 0x00007f1df4c8fdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      The failure appeared in 10.9 after this commit:

      commit dfcbb30a92c2f1d33ceefb56a1d3fa13f8d0ce67
      Author: Rucha Deodhar
      Date:   Mon Nov 22 22:59:30 2021 +0530
       
          MDEV-22224: Support JSON Path negative index
      

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              Assignee:
              rucha174 Rucha Deodhar
              Reporter:
              elenst Elena Stepanova
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