CREATE TABLE `test_all` (

  `a` char(10) DEFAULT NULL,

  `b` char(10) DEFAULT NULL

) ENGINE=CONNECT DEFAULT CHARSET=latin1 `table_type`=CSV `file_name`='/tmp/test*.csv' `sep_char`=';' `compress`=0 `multiple`=1

4. Query the table:

SELECT a FROM test_all;

-> ERROR 2013 (HY000): Lost connection to MySQL server during query

CREATE TABLE `test1` (

  `a` char(10) DEFAULT NULL,

  `b` char(10) DEFAULT NULL

) ENGINE=CONNECT DEFAULT CHARSET=latin1 `table_type`=CSV `file_name`='/tmp/test1.csv' `sep_char`=';' `compress`=0 `multiple`=0

SELECT a FROM test1;

+------+

| a    |

+------+

| test |

+------+

Server version: 10.0.2-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=1

max_threads=153

thread_count=1

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 466436 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x288d158

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 = 0x7fbb52d84d78 thread_stack 0x48000

??:0(my_print_stacktrace)[0xad121e]

??:0(handle_fatal_signal)[0x6db20b]

??:0(??)[0x7fbb529b3500]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7fbb14004c40): is an invalid pointer

Connection ID (thread ID): 1

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off,exists_to_in=off