MDEV-22178 Assertion `info->alias.str' failed in partition_info::chec…

…k_partition_info instead of ER_VERS_WRONG_PARTS

Assign create_info->alias for ALTER TABLE since it is NULL and later
accessed for printing error message.

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

@@ -683,4 +683,11 @@ create table t1 (a int) with system versioning partition by system_time
 alter table t1 add partition (partition p2);
 ERROR HY000: Wrong partitioning type, expected type: `SYSTEM_TIME`
 drop table t1;
+#
+# MDEV-22178 Assertion `info->alias.str' failed in partition_info::check_partition_info instead of ER_VERS_WRONG_PARTS
+#
+create or replace table t1 (a int) with system versioning;
+alter table t1 partition by system_time (partition pn current);
+ERROR HY000: Wrong partitions for `t1`: must have at least one HISTORY and exactly one last CURRENT
+drop table t1;
 # End of 10.3 tests

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

@@ -652,6 +652,15 @@ alter table t1 add partition (partition p2);
 # Cleanup
 drop table t1;
 
+--echo #
+--echo # MDEV-22178 Assertion `info->alias.str' failed in partition_info::check_partition_info instead of ER_VERS_WRONG_PARTS
+--echo #
+create or replace table t1 (a int) with system versioning;
+--error ER_VERS_WRONG_PARTS
+alter table t1 partition by system_time (partition pn current);
+# Cleanup
+drop table t1;
+
 --echo # End of 10.3 tests
 
 --source suite/versioning/common_finish.inc

sql/sql_table.cc

@@ -9850,6 +9850,7 @@ do_continue:;
 
   tmp_disable_binlog(thd);
   create_info->options|=HA_CREATE_TMP_ALTER;
+  create_info->alias= alter_ctx.table_name;
   error= create_table_impl(thd,
                            &alter_ctx.db, &alter_ctx.table_name,
                            &alter_ctx.new_db, &alter_ctx.tmp_name,