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  1. MariaDB Server
  2. MDEV-28288

System versioning doesn't support correct work for engine=connect and doesn't always give any warnings/errors

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    Description

      If add for engine=connect "system versioning" there is no any warnings/errors on creating table and inserting data, but "select" gives an empty result, "update" doesn't change value and "delete" fails with error:

      Test:

      create table t2 (
        x int,
        y int
      ) engine=connect table_type=FIX file_name='test.txt' with system versioning;
       
      insert into t2 values (1,1),(2,2),(3,3),(4,4),(5,5);
      select * from t2;
       
      update t2 set x=10 where y=4;
      select * from t2;
      delete from t2 where x=1;
      select * from t2;
       
      drop table t2;
      

      Result:

      create table t2 (
      x int,
      y int
      ) engine=connect table_type=FIX file_name='/test.txt' with system versioning;
      insert into t2 values (1,1),(2,2),(3,3),(4,4),(5,5);
      select * from t2;
      x	y
      update t2 set x=10 where y=4;
      select * from t2;
      x	y
      delete from t2 where x=1;
       
      mysqltest: At line 11: query 'delete from t2 where x=1' failed: ER_CRASHED_ON_USAGE (1194): Table 't2' is marked as crashed and should be repaired
      

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              midenok Aleksey Midenkov
              lstartseva Lena Startseva
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                Updated:
                Resolved:

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