MDEV-14650 Assertion 0 failed in TABLE::vers_update_fields [fixes #402]

SQL: fixed selecion of handlerton by respecting partitioning

mysql-test/suite/versioning/common.inc

@@ -31,6 +31,16 @@ begin
   return e;
 end~~
 
+create function if not exists non_default_engine()
+returns varchar(255)
+deterministic
+begin
+  if default_engine() = 'InnoDB' then
+    return 'MyISAM';
+  end if;
+  return 'InnoDB';
+end~~
+
 create function if not exists sys_datatype(engine varchar(255))
 returns varchar(255)
 deterministic
@@ -99,6 +109,7 @@ end~~
 delimiter ;~~
 
 let $default_engine= `select default_engine()`;
+let $non_default_engine= `select non_default_engine()`;
 let $sys_datatype= `select sys_datatype(default_engine())`;
 let $sys_datatype_uc= `select upper(sys_datatype(default_engine()))`;
 --enable_query_log

mysql-test/suite/versioning/common_finish.inc

@@ -2,6 +2,7 @@
 drop procedure verify_vtq;
 drop procedure innodb_verify_vtq;
 drop function default_engine;
+drop function non_default_engine;
 drop function sys_commit_ts;
 drop function sys_datatype;
 drop function current_row;

mysql-test/suite/versioning/r/create.result

 drop table if exists t1;
-create function if not exists non_default_engine()
-returns varchar(255)
-deterministic
-begin
-if default_engine() = 'InnoDB' then
-return 'MyISAM';
-end if;
-return 'InnoDB';
-end~~
 create table t1 (
 x1 int unsigned,
 Sys_start SYS_DATATYPE generated always as row start comment 'start',

mysql-test/suite/versioning/r/partition.result

+### check System Versioning and conventional partitioning
 create table t1 (x int)
 with system versioning
 partition by range columns (x) (
@@ -27,6 +28,11 @@ x
 select * from t1 partition (p1) for system_time all;
 x
 300
+### Engine change versioned/non-versioned prohibited
+create or replace table t1 (i int) engine=MyISAM with system versioning partition by hash(i);
+alter table t1 engine=InnoDB;
+ERROR HY000: Not allowed for versioned `test`.`t1`. Change to/from native versioning engine is prohibited.
+### check server-level partitioning
 create or replace table t1 (x int)
 partition by system_time (
 partition p0 versioning,

mysql-test/suite/versioning/t/create.test

@@ -5,19 +5,6 @@
 drop table if exists t1;
 --enable_warnings
 
-delimiter ~~;
-create function if not exists non_default_engine()
-returns varchar(255)
-deterministic
-begin
-  if default_engine() = 'InnoDB' then
-    return 'MyISAM';
-  end if;
-  return 'InnoDB';
-end~~
-delimiter ;~~
-
-let $non_default_engine= `select non_default_engine()`;
 let $non_sys_datatype= `select sys_datatype(non_default_engine())`;
 let $non_sys_datatype_uc= `select upper(sys_datatype(non_default_engine()))`;
 let $sys_datatype_null= $sys_datatype NULL DEFAULT NULL;

mysql-test/suite/versioning/t/partition.test

 -- source suite/versioning/common.inc
 
-### check System Versioning and conventional partitioning
+--echo ### check System Versioning and conventional partitioning
 
 create table t1 (x int)
 with system versioning
@@ -19,7 +19,12 @@ select * from t1 for system_time all;
 select * from t1 partition (p0) for system_time all;
 select * from t1 partition (p1) for system_time all;
 
-### check server-level partitioning
+--echo ### Engine change versioned/non-versioned prohibited
+eval create or replace table t1 (i int) engine=$default_engine with system versioning partition by hash(i);
+--error ER_VERS_ALTER_ENGINE_PROHIBITED
+eval alter table t1 engine=$non_default_engine;
+
+--echo ### check server-level partitioning
 
 # create errors
 --error ER_VERS_ENGINE_UNSUPPORTED

sql/sql_table.cc

@@ -8856,7 +8856,7 @@ bool mysql_alter_table(THD *thd, const char *new_db, const char *new_name,
   {
     if (handlerton *hton1= create_info->db_type)
     {
-      handlerton *hton2= table->file->ht;
+      handlerton *hton2= table->file->partition_ht();
       if (hton1 != hton2 &&
           (ha_check_storage_engine_flag(hton1, HTON_NATIVE_SYS_VERSIONING) ||
            ha_check_storage_engine_flag(hton2, HTON_NATIVE_SYS_VERSIONING)))