* tests which use MERGE or INSERT DELAYED should run only

with engines which support that
* temporarily adding option --global-subst to mysqltest so that
the full testsuite can be run using Maria tables without failing
on trivial differences (like diff in the engine clause of
SHOW CREATE TABLE)
* using recognizable tags for todos of the Maria team


client/mysqltest.c:
  temporarily adding option --global-subst: its argument is X,Y.
  It replaces all occurrences of X by Y into mysqltest's result
  before the comparison with the expected result is done.
  This serves for when a test is run with --default-storage-engine=X
  where X is not MyISAM: tests using SHOW CREATE TABLE will always fail
  because SHOW CREATE TABLE prints X instead of MyISAM. With
  --global-subst=X,MyISAM , such trivial differences are eliminated and
  test may be reported as passing.
  For example, --global-subst=MARIA,MyISAM
  This is not good enough for merging into main trees! just for running
  many tests and finding bugs now!
mysql-test/mysql-test-run.pl:
  new option --mysqltest to pass options to mysqltest (like we have
  --mysqld). Used for example like this:
  ./mtr --mysqltest=--global-subst=MARIA,MyISAM
mysql-test/r/merge.result:
  update
mysql-test/t/delayed.test:
  run test only with engines which support INSERT DELAYED
mysql-test/t/merge.test:
  run test only with MyISAM tables, as they are required by MERGE
sql/sql_delete.cc:
  recognizable tag
sql/table.cc:
  recognizable tag
storage/maria/ha_maria.cc:
  recognizable tag
storage/maria/ma_check.c:
  recognizable tag
storage/maria/ma_create.c:
  recognizable tag

10 files changed, 117 insertions, 28 deletions

diff --git a/client/mysqltest.c b/client/mysqltest.c
index 0a1b57ff80a..76176d8acbb 100644
--- a/client/mysqltest.c
+++ b/client/mysqltest.c
@@ -69,7 +69,8 @@
 enum {
   OPT_SKIP_SAFEMALLOC=OPT_MAX_CLIENT_OPTION,
   OPT_PS_PROTOCOL, OPT_SP_PROTOCOL, OPT_CURSOR_PROTOCOL, OPT_VIEW_PROTOCOL,
-  OPT_MAX_CONNECT_RETRIES, OPT_MARK_PROGRESS, OPT_LOG_DIR
+  OPT_MAX_CONNECT_RETRIES, OPT_MARK_PROGRESS, OPT_LOG_DIR,
+  OPT_GLOBAL_SUBST
 };
 
 static int record= 0, opt_sleep= -1;
@@ -105,6 +106,9 @@ static char delimiter[MAX_DELIMITER_LENGTH]= ";";
 static uint delimiter_length= 1;
 
 static char TMPDIR[FN_REFLEN];
+static char global_subst_from[200];
+static char global_subst_to[200];
+static char *global_subst= NULL;
 
 /* Block stack */
 enum block_cmd {
@@ -788,6 +792,7 @@ void free_used_memory()
   my_free(opt_pass,MYF(MY_ALLOW_ZERO_PTR));
   free_defaults(default_argv);
   free_re();
+  my_free(global_subst, MYF(MY_ALLOW_ZERO_PTR));
 #ifdef __WIN__
   free_tmp_sh_file();
   free_win_path_patterns();
@@ -1088,6 +1093,40 @@ void check_result(DYNAMIC_STRING* ds)
     break; /* ok */
   case RESULT_LENGTH_MISMATCH:
     dump_result_to_reject_file(ds->str, ds->length);
+    if (global_subst)
+    {
+      /**
+         @todo MARIA_HACK
+         This serves for when a test is run with --default-storage-engine=X
+         where X is not MyISAM: tests using SHOW CREATE TABLE will always fail
+         because SHOW CREATE TABLE prints X instead of MyISAM. With
+         --global-subst=X,MyISAM , such trivial differences are eliminated and
+         test may be reported as passing.
+         --global-subst is only a quick way to run a lot of existing tests
+         with Maria and find bugs; it is not good enough for reaching the main
+         trees when Maria is merged into them. It relies on hard-coded path of
+         "replace", on existence of "cmp". It's just horrible but it works for
+         devs using a bk tree in a GNU-based system, which is what we have in
+         the team.
+         --global-subst should be removed.
+      */
+      char reject_file[FN_REFLEN];
+      char sys_com[50 + FN_REFLEN];
+      fn_format(reject_file, result_file_name, "", ".reject",
+                MY_REPLACE_EXT);
+      sprintf(sys_com, "../extra/replace %s %s -- %s >/dev/null",
+              global_subst_from, global_subst_to, reject_file);
+      if (system(sys_com))
+        die("replace failed");
+      sprintf(sys_com, "cmp %s %s >/dev/null",
+              reject_file, result_file_name);
+      if (!system(sys_com))
+      {
+        /* test is ok in fact */
+        my_delete(reject_file, MYF(0));
+        break;
+      }
+    }
     die("Result length mismatch");
     break;
   case RESULT_CONTENT_MISMATCH:
@@ -4430,6 +4469,11 @@ static struct my_option my_long_options[] =
   {"debug", '#', "Output debug log. Often this is 'd:t:o,filename'.",
    0, 0, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0},
 #endif
+  {"global-subst", OPT_GLOBAL_SUBST, "argument should be 'X,Y' ;"
+   " substitute string X with another Y accross the whole test's current"
+   " result before comparing with expected result file",
+   (uchar**) &global_subst, (uchar**) &global_subst, 0,
+   GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"host", 'h', "Connect to host.", (uchar**) &opt_host, (uchar**) &opt_host, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"include", 'i', "Include SQL before each test case.", (uchar**) &opt_include,
@@ -4673,6 +4717,16 @@ int parse_args(int argc, char **argv)
   if (tty_password)
     opt_pass= get_tty_password(NullS);          /* purify tested */
 
+  if (global_subst != NULL)
+  {
+    char *comma= strstr(global_subst, ",");
+    if (comma == NULL)
+      die("wrong --global-subst, must be X,Y");
+    memcpy(global_subst_from, global_subst, (comma-global_subst));
+    global_subst_from[comma-global_subst]= 0;
+    memcpy(global_subst_to, comma+1, strlen(comma));
+  }
+
   return 0;
 }
 
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index 06c1906cd18..9310c8d1626 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -167,6 +167,7 @@ our $opt_small_bench= 0;
 our $opt_big_test= 0;
 
 our @opt_extra_mysqld_opt;
+our @opt_extra_mysqltest_opt;
 
 our $opt_compress;
 our $opt_ssl;
@@ -558,6 +559,9 @@ sub command_line_setup () {
              # Extra options used when starting mysqld
              'mysqld=s'                 => \@opt_extra_mysqld_opt,
 
+             # Extra options used when starting mysqld
+             'mysqltest=s'                 => \@opt_extra_mysqltest_opt,
+
              # Run test on running server
              'extern'                   => \$opt_extern,
              'ndb-connectstring=s'       => \$opt_ndbconnectstring,
@@ -4794,6 +4798,11 @@ sub run_mysqltest ($) {
     mtr_add_arg($args, "--skip-ssl");
   }
 
+  foreach my $arg ( @opt_extra_mysqltest_opt )
+  {
+    mtr_add_arg($args, "%s", $arg);
+  }
+
   # ----------------------------------------------------------------------
   # If embedded server, we create server args to give mysqltest to pass on
   # ----------------------------------------------------------------------
diff --git a/mysql-test/r/merge.result b/mysql-test/r/merge.result
index bb4fc654b38..d22b8ba5fdd 100644
--- a/mysql-test/r/merge.result
+++ b/mysql-test/r/merge.result
@@ -1,3 +1,5 @@
+set global storage_engine=myisam;
+set session storage_engine=myisam;
 drop table if exists t1,t2,t3,t4,t5,t6;
 drop database if exists mysqltest;
 create table t1 (a int not null primary key auto_increment, message char(20));
diff --git a/mysql-test/t/delayed.test b/mysql-test/t/delayed.test
index 396c06f43e7..17c2722dda4 100644
--- a/mysql-test/t/delayed.test
+++ b/mysql-test/t/delayed.test
@@ -5,6 +5,15 @@
 # (Can't be tested with purify :( )
 #
 
+# limit the test to engines which support INSERT DELAYED
+disable_query_log;
+--require r/true.require
+select @@global.storage_engine in
+("memory","myisam","archive","blackhole") and
+@@session.storage_engine in
+("memory","myisam","archive","blackhole") as `TRUE`;
+enable_query_log;
+
 --disable_warnings
 drop table if exists t1;
 --enable_warnings
diff --git a/mysql-test/t/merge.test b/mysql-test/t/merge.test
index fd479276b3b..91bf247c469 100644
--- a/mysql-test/t/merge.test
+++ b/mysql-test/t/merge.test
@@ -2,6 +2,11 @@
 # test of MERGE TABLES
 #
 
+# MERGE tables require MyISAM tables
+let $default=`select @@global.storage_engine`;
+set global storage_engine=myisam;
+set session storage_engine=myisam;
+
 --disable_warnings
 drop table if exists t1,t2,t3,t4,t5,t6;
 drop database if exists mysqltest;
@@ -512,3 +517,9 @@ CHECK TABLE tm1;
 DROP TABLE tm1, t1, t2;
 
 --echo End of 5.0 tests
+
+--disable_result_log
+--disable_query_log
+eval set global storage_engine=$default;
+--enable_result_log
+--enable_query_log
diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc
index c96ae8f2597..43e5bbf968f 100644
--- a/sql/sql_delete.cc
+++ b/sql/sql_delete.cc
@@ -923,11 +923,11 @@ bool mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok)
     table->file->info(HA_STATUS_AUTO | HA_STATUS_NO_LOCK);
 
 #ifdef WITH_MARIA_STORAGE_ENGINE
-    /*
-      A hack until BUG#30309 is fixed.
-      Had to make this, otherwise tests "temp_table.test" and "truncate.test"
-      crashes server at shutdown when using Maria tables: a temporary table is
-      correctly created as non-transactional but then, when truncated, is
+    /**
+       @todo MARIA_HACK until BUG#30309 is fixed.
+       Had to make this, otherwise tests "temp_table.test" and "truncate.test"
+       crashes server at shutdown when using Maria tables: a temporary table
+       is correctly created as non-transactional but then, when truncated, is
       recreated as transactional.
     */
     if (table_type->db_type == DB_TYPE_MARIA)
diff --git a/sql/table.cc b/sql/table.cc
index 6eb758162df..e8add38640c 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -2425,9 +2425,10 @@ void update_create_info_from_table(HA_CREATE_INFO *create_info, TABLE *table)
   create_info->row_type= share->row_type;
   create_info->default_table_charset= share->table_charset;
   create_info->table_charset= 0;
-  /*
-    See hack in mysql_truncate(); when this is properly fixed, the if() below
-    can be removed, the assignment can always be made.
+  /**
+     @todo MARIA_HACK
+     See hack in mysql_truncate(); when this is properly fixed, the if() below
+     can be removed, the assignment can always be made.
   */
   if (create_info->transactional == HA_CHOICE_UNDEF)
     create_info->transactional= share->transactional;
diff --git a/storage/maria/ha_maria.cc b/storage/maria/ha_maria.cc
index cfc8e5fc07a..99b92c1bcfc 100644
--- a/storage/maria/ha_maria.cc
+++ b/storage/maria/ha_maria.cc
@@ -746,7 +746,8 @@ int ha_maria::open(const char *name, int mode, uint test_if_locked)
   if (!(file= maria_open(name, mode, test_if_locked | HA_OPEN_FROM_SQL_LAYER)))
     return (my_errno ? my_errno : -1);
 
-  /*
+  /**
+     @todo ASK_MONTY
     This is a protection for the case of a frm and MAI containing incompatible
     table definitions (as in BUG#25908). This was merged from MyISAM.
     But it breaks maria.test and ps_maria.test ("incorrect key file") if the
@@ -2160,7 +2161,8 @@ int ha_maria::create(const char *name, register TABLE *table_arg,
   create_info.data_file_name= ha_create_info->data_file_name;
   create_info.index_file_name= ha_create_info->index_file_name;
 #ifdef ASK_MONTY
-  /*
+  /**
+     @todo ASK_MONTY
     Where "transactional" in the frm and in the engine can go out of sync.
     Don't we want to do, after the setting, this test:
     if (!create_info.transactional &&
diff --git a/storage/maria/ma_check.c b/storage/maria/ma_check.c
index e15c9405e23..a68a21d0180 100644
--- a/storage/maria/ma_check.c
+++ b/storage/maria/ma_check.c
@@ -2047,9 +2047,10 @@ int maria_repair(HA_CHECK *param, register MARIA_HA *info,
       }
       _ma_reset_status(sort_info.new_info);
 #ifdef ASK_MONTY /* cf maria_create() */
-      /*
-        without this call, a REPAIR on an empty table leaves the data file of
-        size 0, which sounds reasonable.
+      /**
+         @todo ASK_MONTY
+         without this call, a REPAIR on an empty table leaves the data file of
+         size 0, which sounds reasonable.
       */
       if (_ma_initialize_data_file(sort_info.new_info->s, new_file))
         goto err;
@@ -2272,20 +2273,19 @@ err:
 		  llstr(sort_param.start_recpos,llbuff));
     if (sort_info.new_info && sort_info.new_info != sort_info.info)
     {
-#ifdef ASK_MONTY
-      /*
-        grepping for "dfile.file="
-        shows several places (ma_check.c, ma_panic.c, ma_extra.c) where we
-        modify dfile.file without modifying share->bitmap.file.file; those
-        sound like bugs because the two variables are normally copies of each
-        other in BLOCK_RECORD (and in other record formats it does not hurt to
-        change the unused share->bitmap.file.file).
-        It does matter, because if we close dfile.file, set dfile.file to -1,
-        but leave bitmap.file.file to its positive value, maria_close() will
-        close a file which it is not allowed to (maybe even a file in another
-        engine or mysqld!).
+      /**
+         @todo ASK_MONTY
+         grepping for "dfile.file="
+         shows several places (ma_check.c, ma_panic.c, ma_extra.c) where we
+         modify dfile.file without modifying share->bitmap.file.file; those
+         sound like bugs because the two variables are normally copies of each
+         other in BLOCK_RECORD (and in other record formats it does not hurt
+         to change the unused share->bitmap.file.file).
+         It does matter, because if we close dfile.file, set dfile.file to -1,
+         but leave bitmap.file.file to its positive value, maria_close() will
+         close a file which it is not allowed to (maybe even a file in another
+         engine or mysqld!).
       */
-#endif
       sort_info.new_info->dfile.file= -1;
       maria_close(sort_info.new_info);
     }
diff --git a/storage/maria/ma_create.c b/storage/maria/ma_create.c
index b3aef7c544c..f944b9d8bf7 100644
--- a/storage/maria/ma_create.c
+++ b/storage/maria/ma_create.c
@@ -1041,7 +1041,8 @@ int maria_create(const char *name, enum data_file_type datafile_type,
       goto err;
     errpos=3;
 
-    /*
+    /**
+       @todo ASK_MONTY
       QQ: this sets data_file_length from 0 to 8192, but we wrote the state
       already to the index file (because:
       - log record is built from index header so state must be written before