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      Description

      Spider crashes when selecting a literal. Reproduce like this:

      CREATE TABLE t1(c1 INTEGER);
      CREATE TABLE t1s(c1 INTEGER) ENGINE=SPIDER COMMENT="host '127.0.0.1', user 'root', table 't1'";
      SELECT c1 FROM t1s;
      SELECT 1 FROM t1s;
      ERROR 2013 (HY000): Lost connection to MySQL server during query
      

      Error log:

      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed,
      something is definitely wrong and this may fail.
       
      Server version: 10.3.9-MariaDB
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=2
      max_threads=153
      thread_count=28
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467396 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f603ff309a8
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f60192cfd70 thread_stack 0x49000
      mysys/stacktrace.c:270(my_print_stacktrace)[0x7f603c3a366e]
      sql/signal_handler.cc:168(handle_fatal_signal)[0x7f603be33f37]
      sigaction.c:0(__restore_rt)[0x7f603b283100]
      spider/spd_db_mysql.cc:12892(spider_mysql_handler::append_list_item_select(List<Item>*, spider_string*, char const*, unsigned int, bool, spider_fields*))[0x7f602e467751]
      spider/spd_group_by_handler.cc:1264(spider_group_by_handler::init_scan())[0x7f602e46acdf]
      sql/group_by_handler.cc:49(Pushdown_query::execute(JOIN*))[0x7f603bcd3ad3]
      sql/sql_select.cc:18741(do_select)[0x7f603bcb770a]
      sql/sql_select.cc:3823(JOIN::exec())[0x7f603bcb7f93]
      sql/sql_select.cc:4229(mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x7f603bcb80ea]
      sql/sql_select.cc:382(handle_select(THD*, LEX*, select_result*, unsigned long))[0x7f603bcb8bfc]
      sql/sql_parse.cc:6547(execute_sqlcom_select)[0x7f603bb6e19f]
      sql/sql_parse.cc:3768(mysql_execute_command(THD*))[0x7f603bc64fbd]
      sql/sql_parse.cc:8089(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x7f603bc677cb]
      sql/sql_parse.cc:1850(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x7f603bc6a315]
      sql/sql_parse.cc:1397(do_command(THD*))[0x7f603bc6b17e]
      sql/sql_connect.cc:1402(do_handle_one_connection(CONNECT*))[0x7f603bd3b50a]
      sql/sql_connect.cc:1310(handle_one_connection)[0x7f603bd3b62d]
      pthread_create.c:0(start_thread)[0x7f603b27bdc5]
      /lib64/libc.so.6(clone+0x6d)[0x7f60398d1ced]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f603ff403b0): select 1 from t1s
      Connection ID (thread ID): 28
      Status: NOT_KILLED
      

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              • Assignee:
                jacob-mathew Jacob Mathew (Inactive)
                Reporter:
                karlsson Anders Karlsson
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                • Created:
                  Updated:
                  Resolved: