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  1. MariaDB Server
  2. MDEV-12554

Server crashes in st_select_lex_unit::exec_recursive on recursive CTE with impossible condition

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      54a995cd2206995f6dd675cabdce12a4b7ff7540

      #3  <signal handler called>
      #4  0x00007f88b7960ee4 in st_select_lex_unit::exec_recursive (this=0x7f88940128f0) at /data/src/10.2/sql/sql_union.cc:1265
      #5  0x00007f88b784cdf8 in TABLE_LIST::fill_recursive (this=0x7f8894014f90, thd=0x7f8894000b00) at /data/src/10.2/sql/sql_derived.cc:973
      #6  0x00007f88b784cfdc in mysql_derived_fill (thd=0x7f8894000b00, lex=0x7f8894004518, derived=0x7f8894014f90) at /data/src/10.2/sql/sql_derived.cc:1037
      #7  0x00007f88b784b482 in mysql_handle_single_derived (lex=0x7f8894004518, derived=0x7f8894014f90, phases=96) at /data/src/10.2/sql/sql_derived.cc:197
      #8  0x00007f88b78d99b5 in st_join_table::preread_init (this=0x7f889403bbe0) at /data/src/10.2/sql/sql_select.cc:11756
      #9  0x00007f88b78e9a01 in sub_select (join=0x7f88940156b8, join_tab=0x7f889403bbe0, end_of_records=false) at /data/src/10.2/sql/sql_select.cc:18426
      #10 0x00007f88b78e9137 in do_select (join=0x7f88940156b8, procedure=0x0) at /data/src/10.2/sql/sql_select.cc:18002
      #11 0x00007f88b78c3d61 in JOIN::exec_inner (this=0x7f88940156b8) at /data/src/10.2/sql/sql_select.cc:3464
      #12 0x00007f88b78c3266 in JOIN::exec (this=0x7f88940156b8) at /data/src/10.2/sql/sql_select.cc:3267
      #13 0x00007f88b78c43d9 in mysql_select (thd=0x7f8894000b00, tables=0x7f8894014f90, wild_num=1, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f8894015698, unit=0x7f88940045e0, select_lex=0x7f8894004d10) at /data/src/10.2/sql/sql_select.cc:3659
      #14 0x00007f88b78b8ea2 in handle_select (thd=0x7f8894000b00, lex=0x7f8894004518, result=0x7f8894015698, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:373
      #15 0x00007f88b7885223 in execute_sqlcom_select (thd=0x7f8894000b00, all_tables=0x7f8894014f90) at /data/src/10.2/sql/sql_parse.cc:6431
      #16 0x00007f88b787b262 in mysql_execute_command (thd=0x7f8894000b00) at /data/src/10.2/sql/sql_parse.cc:3448
      #17 0x00007f88b7888bf6 in mysql_parse (thd=0x7f8894000b00, rawbuf=0x7f8894012348 "WITH RECURSIVE cte(f) AS ( SELECT i FROM t UNION SELECT f FROM t, cte WHERE 0 ) SELECT * FROM cte", length=97, parser_state=0x7f88b007d210, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7874
      #18 0x00007f88b7876cce in dispatch_command (command=COM_QUERY, thd=0x7f8894000b00, packet=0x7f88940087a1 "", packet_length=97, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1812
      #19 0x00007f88b787563e in do_command (thd=0x7f8894000b00) at /data/src/10.2/sql/sql_parse.cc:1362
      #20 0x00007f88b79bfe05 in do_handle_one_connection (connect=0x7f88bac72260) at /data/src/10.2/sql/sql_connect.cc:1354
      #21 0x00007f88b79bfb92 in handle_one_connection (arg=0x7f88bac72260) at /data/src/10.2/sql/sql_connect.cc:1260
      #22 0x00007f88b7dd8eb8 in pfs_spawn_thread (arg=0x7f88bac4cb10) at /data/src/10.2/storage/perfschema/pfs.cc:1862
      #23 0x00007f88b6e9b064 in start_thread (arg=0x7f88b007e700) at pthread_create.c:309
      #24 0x00007f88b528b62d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
      

      CREATE TABLE t (i INT);
      INSERT INTO t VALUES (1),(2); # optional, fails either way
       
      WITH RECURSIVE cte(f) AS ( SELECT i FROM t UNION SELECT f FROM t, cte WHERE 0 ) SELECT * FROM cte;
      

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            Assignee:
            igor Igor Babaev
            Reporter:
            elenst Elena Stepanova
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              Updated:
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