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  1. MariaDB Server
  2. MDEV-7971

Assertion `name != __null' failed in ACL_internal_schema_registry::lookup on 2nd execution os PS with multi-table update



    • 10.0.20


      CREATE TABLE t1 (f1 INT);
      INSERT INTO t1 VALUES (1),(2);
      CREATE TABLE t2 (f2 INT);
      INSERT INTO t2 VALUES (3),(4);
      CREATE TABLE t3 (f3 INT);
      INSERT INTO t3 VALUES (5),(6);
      PREPARE stmt FROM '
        UPDATE t1, t2 
        SET f1 = 5
        WHERE 8 IN ( SELECT MIN(f3) FROM t3 )
      EXECUTE stmt;
      EXECUTE stmt;

      Stack trace from 10.0 commit 50d98e9c

      10.0/sql/sql_acl.cc:10717: static const ACL_internal_schema_access* ACL_internal_schema_registry::lookup(const char*): Assertion `name != __null' failed.
      150409 20:14:21 [ERROR] mysqld got signal 6 ;
      #6  0x00007f5990d3b311 in *__GI___assert_fail (assertion=0xef24c4 "name != __null", file=<optimized out>, line=10717, function=0xef3aa0 "static const ACL_internal_schema_access* ACL_internal_schema_registry::lookup(const char*)") at assert.c:81
      #7  0x000000000060fe2a in ACL_internal_schema_registry::lookup (name=0x0) at 10.0/sql/sql_acl.cc:10717
      #8  0x000000000060fee0 in get_cached_schema_access (grant_internal_info=0x7f59891f4358, schema_name=0x0) at 10.0/sql/sql_acl.cc:10744
      #9  0x000000000060ff63 in get_cached_table_access (grant_internal_info=0x7f59891f4358, schema_name=0x0, table_name=0x0) at 10.0/sql/sql_acl.cc:10767
      #10 0x0000000000605179 in check_grant (thd=0x7f598bb2f070, want_access=4, tables=0x7f59891f4088, any_combination_will_do=false, number=0, no_errors=true) at 10.0/sql/sql_acl.cc:6680
      #11 0x00000000006898e2 in multi_update_precheck (thd=0x7f598bb2f070, tables=0x7f59893475c0) at 10.0/sql/sql_parse.cc:7746
      #12 0x000000000067e437 in mysql_execute_command (thd=0x7f598bb2f070) at 10.0/sql/sql_parse.cc:3313
      #13 0x000000000069f51e in Prepared_statement::execute (this=0x7f5989291470, expanded_query=0x7f5992f43ae0, open_cursor=false) at 10.0/sql/sql_prepare.cc:3971
      #14 0x000000000069e5f9 in Prepared_statement::execute_loop (this=0x7f5989291470, expanded_query=0x7f5992f43ae0, open_cursor=false, packet=0x0, packet_end=0x0) at 10.0/sql/sql_prepare.cc:3626
      #15 0x000000000069c8fb in mysql_sql_stmt_execute (thd=0x7f598bb2f070) at 10.0/sql/sql_prepare.cc:2777
      #16 0x000000000067c68c in mysql_execute_command (thd=0x7f598bb2f070) at 10.0/sql/sql_parse.cc:2560
      #17 0x0000000000686e85 in mysql_parse (thd=0x7f598bb2f070, rawbuf=0x7f59890e0088 "EXECUTE stmt", length=12, parser_state=0x7f5992f44600) at 10.0/sql/sql_parse.cc:6517
      #18 0x00000000006798b1 in dispatch_command (command=COM_QUERY, thd=0x7f598bb2f070, packet=0x7f598afeb071 "EXECUTE stmt", packet_length=12) at 10.0/sql/sql_parse.cc:1300
      #19 0x0000000000678c47 in do_command (thd=0x7f598bb2f070) at 10.0/sql/sql_parse.cc:996
      #20 0x0000000000796457 in do_handle_one_connection (thd_arg=0x7f598bb2f070) at 10.0/sql/sql_connect.cc:1375
      #21 0x00000000007961aa in handle_one_connection (arg=0x7f598bb2f070) at 10.0/sql/sql_connect.cc:1289
      #22 0x0000000000cd391e in pfs_spawn_thread (arg=0x7f598af6ce70) at 10.0/storage/perfschema/pfs.cc:1860
      #23 0x00007f5992b35b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
      #24 0x00007f5990deb95d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

      The problem appeared in 10.0 tree with this commit:

      commit 775528ada3c2cc3a2a7ebafadebbcf44530aab50 0f8b194146b50afe442682c5a14a8a179e28f3b8
      Author: Sergei Petrunia <psergey@askmonty.org>
      Date:   Fri Feb 20 03:17:46 2015 +0300
          MDEV-7220: Materialization strategy is not used for REPLACE ... SELECT
          Enable subquery materialization for non-SELECT queries with a SELECT part


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              psergei Sergei Petrunia
              elenst Elena Stepanova
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