BUG#23404 - ROW_FORMAT=FIXED option is lost is an index is added to the

            table

ROW_FORMAT option is lost during CREATE/DROP INDEX.

This fix forces CREATE/DROP INDEX to retain ROW_FORMAT by instructing
mysql_alter_table() that ROW_FORMAT is not used during creating/dropping
indexes.


mysql-test/r/alter_table.result:
  A test case for bug#23404.
mysql-test/t/alter_table.test:
  A test case for bug#23404.
sql/sql_parse.cc:
  CREATE/DROP INDEX must not change ROW_FORMAT. Setting create_info.row_type
  to ROW_TYPE_NOT_USED informs mysql_alter_table that ROW_FORMAT was not
  used during alteration, and thus must be retained.

mysql-test/r/alter_table.result

@@ -543,3 +543,18 @@ ERROR 3D000: No database selected
 alter table test.t1 rename test.t1;
 use test;
 drop table t1;
+CREATE TABLE t1(a INT) ROW_FORMAT=FIXED;
+CREATE INDEX i1 ON t1(a);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) default NULL,
+  KEY `i1` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 ROW_FORMAT=FIXED
+DROP INDEX i1 ON t1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 ROW_FORMAT=FIXED
+DROP TABLE t1;

mysql-test/t/alter_table.test

@@ -392,4 +392,15 @@ alter table test.t1 rename test.t1;
 use test;
 drop table t1;
 
+#
+# BUG#23404 - ROW_FORMAT=FIXED option is lost is an index is added to the
+# table
+#
+CREATE TABLE t1(a INT) ROW_FORMAT=FIXED;
+CREATE INDEX i1 ON t1(a);
+SHOW CREATE TABLE t1;
+DROP INDEX i1 ON t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
 # End of 4.1 tests

sql/sql_parse.cc

@@ -5481,6 +5481,7 @@ int mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys)
   bzero((char*) &create_info,sizeof(create_info));
   create_info.db_type=DB_TYPE_DEFAULT;
   create_info.default_table_charset= thd->variables.collation_database;
+  create_info.row_type= ROW_TYPE_NOT_USED;
   DBUG_RETURN(mysql_alter_table(thd,table_list->db,table_list->real_name,
 				&create_info, table_list,
 				fields, keys, 0, (ORDER*)0,
@@ -5497,6 +5498,7 @@ int mysql_drop_index(THD *thd, TABLE_LIST *table_list, ALTER_INFO *alter_info)
   bzero((char*) &create_info,sizeof(create_info));
   create_info.db_type=DB_TYPE_DEFAULT;
   create_info.default_table_charset= thd->variables.collation_database;
+  create_info.row_type= ROW_TYPE_NOT_USED;
   alter_info->clear();
   alter_info->flags= ALTER_DROP_INDEX;
   alter_info->is_simple= 0;