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  1. MariaDB Server
  2. MDEV-12846

sql_mode=ORACLE: using Oracle-style placeholders in direct query execution makes the server crash

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      This problem is repeatable in bb-10.2-ext and 10.3.

      This query correctly returns an error:

      SET sql_mode=DEFAULT; SELECT ?;
      

      ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '?' at line 1
      

      This query makes the server crash on DBUG_ASSERT:

      SET sql_mode=ORACLE; SELECT :a;
      

      with the following stack trace:

      #0  0x00007ffff5ddaa28 in raise () from /lib64/libc.so.6
      #1  0x00007ffff5ddc62a in abort () from /lib64/libc.so.6
      #2  0x00007ffff5dd3227 in __assert_fail_base () from /lib64/libc.so.6
      #3  0x00007ffff5dd32d2 in __assert_fail () from /lib64/libc.so.6
      #4  0x0000555555e41753 in Item_param::val_str (this=0x7ffe6c0119a0, 
          str=0x7ffff4197bd0) at /home/bar/maria-git/server.10.2-ext/sql/item.cc:4085
      #5  0x0000555555d36e0d in Type_handler::Item_send_str (
          this=0x5555571fcce8 <type_handler_varchar>, item=0x7ffe6c0119a0, protocol=
          0x7ffe6c001030, buf=0x7ffff4197ba0)
          at /home/bar/maria-git/server.10.2-ext/sql/sql_type.cc:4963
      #6  0x0000555555d39ac6 in Type_handler_string_result::Item_send (
          this=0x5555571fcce8 <type_handler_varchar>, item=0x7ffe6c0119a0, 
          protocol=0x7ffe6c001030, buf=0x7ffff4197ba0)
          at /home/bar/maria-git/server.10.2-ext/sql/sql_type.h:1593
      #7  0x0000555555a97ea2 in Item::send (this=0x7ffe6c0119a0, 
          protocol=0x7ffe6c001030, buffer=0x7ffff4197ba0)
      

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Updated:
                Resolved:

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