MDEV-29727 ALTER and CREATE with default partitioning

	   differently react to SQL_MODE => unusable SHOW CREATE

Use abort_on_warning dependent on strict mode over create new table
like it is done for copy data and inplace alter.

mysql-test/suite/plugins/r/audit_null_debug.result

+set @old_sql_mode= @@sql_mode;
+set @@sql_mode= '';
 alter table mysql.plugin engine=myisam;
 Warnings:
 Warning	1478	Table storage engine 'MyISAM' does not support the create option 'TRANSACTIONAL=1'
+set @@sql_mode= @old_sql_mode;
 set @old_dbug=@@debug_dbug;
 call mtr.add_suppression("Index for table.*mysql.plugin.MYI");
 call mtr.add_suppression("Index for table 'plugin' is corrupt; try to repair it");

mysql-test/suite/plugins/t/audit_null_debug.test

@@ -5,7 +5,10 @@ if (!$ADT_NULL_SO) {
   skip No NULL_AUDIT plugin;
 }
 
+set @old_sql_mode= @@sql_mode;
+set @@sql_mode= '';
 alter table mysql.plugin engine=myisam;
+set @@sql_mode= @old_sql_mode;
 
 set @old_dbug=@@debug_dbug;
 call mtr.add_suppression("Index for table.*mysql.plugin.MYI");

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

@@ -1781,6 +1781,16 @@ t1	CREATE TABLE `t1` (
  PARTITION `pn` CURRENT ENGINE = DEFAULT_ENGINE)
 drop tables t1;
 #
+# MDEV-29727 ALTER and CREATE with default partitioning
+#            differently react to SQL_MODE => unusable SHOW CREATE
+#
+create table t (a int) with system versioning;
+alter table t partition by system_time partitions 3;
+ERROR HY000: Maybe missing parameters: no rotation condition for multiple HISTORY partitions.
+drop table t;
+create table t (a int) with system versioning partition by system_time partitions 3;
+ERROR HY000: Maybe missing parameters: no rotation condition for multiple HISTORY partitions.
+#
 # End of 10.5 tests
 #
 set global innodb_stats_persistent= @save_persistent;

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

@@ -1548,6 +1548,17 @@ show create table t1;
 
 drop tables t1;
 
+--echo #
+--echo # MDEV-29727 ALTER and CREATE with default partitioning
+--echo #            differently react to SQL_MODE => unusable SHOW CREATE
+--echo #
+create table t (a int) with system versioning;
+--error WARN_VERS_PARAMETERS
+alter table t partition by system_time partitions 3;
+drop table t;
+--error WARN_VERS_PARAMETERS
+create table t (a int) with system versioning partition by system_time partitions 3;
+
 --echo #
 --echo # End of 10.5 tests
 --echo #

sql/sql_table.cc

@@ -10792,6 +10792,7 @@ do_continue:;
   else
     alter_info->flags|= ALTER_INDEX_ORDER;
   create_info->alias= alter_ctx.table_name;
+  thd->abort_on_warning= !ignore && thd->is_strict_mode();
   /*
     Partitioning: part_info is passed via thd->work_part_info
   */
@@ -10801,6 +10802,7 @@ do_continue:;
                            thd->lex->create_info, create_info, alter_info,
                            C_ALTER_TABLE_FRM_ONLY, NULL,
                            &key_info, &key_count, &frm);
+  thd->abort_on_warning= false;
   reenable_binlog(thd);
   if (unlikely(error))
   {