MDEV-5867 ALTER TABLE t1 ENGINE=InnoDB keeps bad options when t1 ENGINE is CONNECT

Comment out unknown options in SHOW CREATE TABLE unless IGNORE_BAD_TABLE_OPTIONS is used

mysql-test/r/table_options-5867.result

+install soname 'ha_example';
+set sql_mode='ignore_bad_table_options';
+create table t1 (
+a int complex='c,f,f,f' invalid=3
+) engine=example ull=10000 str='dskj' one_or_two='one' yesno=0
+foobar=barfoo;
+Warnings:
+Warning	1911	Unknown option 'invalid'
+Warning	1911	Unknown option 'foobar'
+create table t2 (a int, key (a) some_option=2014);
+Warnings:
+Warning	1911	Unknown option 'some_option'
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL `complex`='c,f,f,f' `invalid`=3
+) ENGINE=EXAMPLE DEFAULT CHARSET=latin1 `ull`=10000 `str`='dskj' `one_or_two`='one' `yesno`=0 `foobar`=barfoo `VAROPT`='5'
+show create table t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  KEY `a` (`a`) `some_option`=2014
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+set sql_mode='';
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL `complex`='c,f,f,f' /* `invalid`=3 */
+) ENGINE=EXAMPLE DEFAULT CHARSET=latin1 `ull`=10000 `str`='dskj' `one_or_two`='one' `yesno`=0 /* `foobar`=barfoo */ `VAROPT`='5'
+show create table t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  KEY `a` (`a`) /* `some_option`=2014 */
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1, t2;
+uninstall soname 'ha_example';

mysql-test/suite/rpl/r/rpl_table_options.result

@@ -10,6 +10,12 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=EXAMPLE DEFAULT CHARSET=latin1 `ull`=12340 `VAROPT`='5'
 show create table t1;
 Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 /* `ull`=12340 */
+set sql_mode=ignore_bad_table_options;
+show create table t1;
+Table	Create Table
 t1	CREATE TABLE `t1` (
   `a` int(11) NOT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 `ull`=12340

mysql-test/suite/rpl/t/rpl_table_options.test

@@ -23,6 +23,8 @@ show create table t1;
 sync_slave_with_master;
 connection slave;
 show create table t1;
+set sql_mode=ignore_bad_table_options;
+show create table t1;
 
 connection master;
 drop table t1;

mysql-test/t/table_options-5867.test

+#
+# MDEV-5867 ALTER TABLE t1 ENGINE=InnoDB keeps bad options when t1 ENGINE is CONNECT
+#
+# verify that SHOW CREATE TABLE hides unknown options when IGNORE_BAD_TABLE_OPTIONS is not set
+
+--source include/have_example_plugin.inc
+--source include/not_embedded.inc
+
+install soname 'ha_example';
+
+set sql_mode='ignore_bad_table_options';
+create table t1 (
+  a int complex='c,f,f,f' invalid=3
+) engine=example ull=10000 str='dskj' one_or_two='one' yesno=0
+  foobar=barfoo;
+
+create table t2 (a int, key (a) some_option=2014);
+
+show create table t1;
+show create table t2;
+
+set sql_mode='';
+
+show create table t1;
+show create table t2;
+
+drop table t1, t2;
+
+uninstall soname 'ha_example';
+

sql/create_options.cc

@@ -775,3 +775,20 @@ engine_option_value *merge_engine_table_options(engine_option_value *first,
                                    &first, &end);
   DBUG_RETURN(first);
 }
+
+bool is_engine_option_known(engine_option_value *opt,
+                            ha_create_table_option *rules)
+{
+  if (!rules)
+    return false;
+
+  for (; rules->name; rules++)
+  {
+      if (!my_strnncoll(system_charset_info,
+                        (uchar*)rules->name, rules->name_length,
+                        (uchar*)opt->name.str, opt->name.length))
+        return true;
+  }
+  return false;
+}
+

sql/create_options.h

@@ -99,4 +99,6 @@ uchar *engine_table_options_frm_image(uchar *buff,
 
 bool engine_options_differ(void *old_struct, void *new_struct,
                            ha_create_table_option *rules);
+bool is_engine_option_known(engine_option_value *opt,
+                            ha_create_table_option *rules);
 #endif

sql/sql_show.cc

@@ -1519,13 +1519,34 @@ static bool get_field_default_value(THD *thd, Field *field, String *def_value,
   @param thd             thread handler
   @param packet          string to append
   @param opt             list of options
+  @param check_options   only print known options
+  @param rules           list of known options
 */
 
 static void append_create_options(THD *thd, String *packet,
-				  engine_option_value *opt)
+				  engine_option_value *opt,
+                                  bool check_options,
+                                  ha_create_table_option *rules)
 {
+  bool in_comment= false;
   for(; opt; opt= opt->next)
   {
+    if (check_options)
+    {
+      if (is_engine_option_known(opt, rules))
+      {
+        if (in_comment)
+          packet->append(STRING_WITH_LEN(" */"));
+        in_comment= false;
+      }
+      else
+      {
+        if (!in_comment)
+          packet->append(STRING_WITH_LEN(" /*"));
+        in_comment= true;
+      }
+    }
+
     DBUG_ASSERT(opt->value.str);
     packet->append(' ');
     append_identifier(thd, packet, opt->name.str, opt->name.length);
@@ -1535,6 +1556,8 @@ static void append_create_options(THD *thd, String *packet,
     else
       packet->append(opt->value.str, opt->value.length);
   }
+  if (in_comment)
+    packet->append(STRING_WITH_LEN(" */"));
 }
 
 /*
@@ -1585,6 +1608,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
                                        MODE_MYSQL40);
   bool show_table_options= !(sql_mode & MODE_NO_TABLE_OPTIONS) &&
                            !foreign_db_mode;
+  bool check_options= !(sql_mode & MODE_IGNORE_BAD_TABLE_OPTIONS) &&
+                      !create_info_arg;
   handlerton *hton;
   my_bitmap_map *old_map;
   int error= 0;
@@ -1734,7 +1759,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
       packet->append(STRING_WITH_LEN(" COMMENT "));
       append_unescaped(packet, field->comment.str, field->comment.length);
     }
-    append_create_options(thd, packet, field->option_list);
+    append_create_options(thd, packet, field->option_list, check_options,
+                          hton->field_options);
   }
 
   key_info= table->key_info;
@@ -1801,7 +1827,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
       append_identifier(thd, packet, parser_name->str, parser_name->length);
       packet->append(STRING_WITH_LEN(" */ "));
     }
-    append_create_options(thd, packet, key_info->option_list);
+    append_create_options(thd, packet, key_info->option_list, check_options,
+                          hton->index_options);
   }
 
   /*
@@ -1952,7 +1979,8 @@ int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
       packet->append(STRING_WITH_LEN(" CONNECTION="));
       append_unescaped(packet, share->connect_string.str, share->connect_string.length);
     }
-    append_create_options(thd, packet, share->option_list);
+    append_create_options(thd, packet, share->option_list, check_options,
+                          hton->table_options);
     append_directory(thd, packet, "DATA",  create_info.data_file_name);
     append_directory(thd, packet, "INDEX", create_info.index_file_name);
   }
@@ -5129,7 +5157,7 @@ static int get_schema_tables_record(THD *thd, TABLE_LIST *tables,
       str.qs_append(STRING_WITH_LEN(" transactional="));
       str.qs_append(ha_choice_values[(uint) share->transactional]);
     }
-    append_create_options(thd, &str, share->option_list);
+    append_create_options(thd, &str, share->option_list, false, 0);
 
     if (str.length())
       table->field[19]->store(str.ptr()+1, str.length()-1, cs);

storage/connect/mysql-test/connect/r/alter.result

@@ -218,13 +218,22 @@ Three	3
 # Changing to another engine is Ok
 # However, the data file is not deleted.
 #
-ALTER TABLE t1 ENGINE=MARIA;
+ALTER TABLE t1 ENGINE=ARIA;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `d` char(10) NOT NULL /* `FLAG`=11 */,
+  `c` int(11) NOT NULL /* `FLAG`=0 */
+) ENGINE=Aria DEFAULT CHARSET=latin1 PAGE_CHECKSUM=1 /* `TABLE_TYPE`=fix `FILE_NAME`='tf1.txt' `ENDING`=1 */
+set @old_sql_mode=@@sql_mode;
+set sql_mode=ignore_bad_table_options;
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
   `d` char(10) NOT NULL `FLAG`=11,
   `c` int(11) NOT NULL `FLAG`=0
 ) ENGINE=Aria DEFAULT CHARSET=latin1 PAGE_CHECKSUM=1 `TABLE_TYPE`=fix `FILE_NAME`='tf1.txt' `ENDING`=1
+set sql_mode=@old_sql_mode;
 SELECT * from t1;
 d	c
 One	1

storage/connect/mysql-test/connect/t/alter.test

@@ -105,8 +105,12 @@ SELECT * FROM t1;
 --echo # Changing to another engine is Ok
 --echo # However, the data file is not deleted.
 --echo #
-ALTER TABLE t1 ENGINE=MARIA;
+ALTER TABLE t1 ENGINE=ARIA;
 SHOW CREATE TABLE t1;
+set @old_sql_mode=@@sql_mode;
+set sql_mode=ignore_bad_table_options;
+SHOW CREATE TABLE t1;
+set sql_mode=@old_sql_mode;
 SELECT * from t1;
 SELECT * from t2;