Support 6 digit version numbers in executable comment syntax.

This is needed to be able to ignore executable comments from version 10.0.

mysql-test/r/comments.result

@@ -38,11 +38,14 @@ select 1 /*M!50300 +1 */;
 select 2 /*M!99999 +1 */;
 2
 2
+select 2 /*M!100000 +1 */;
+2
+2
 select 2 /*M!0000 +1 */;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '0000 +1 */' at line 1
 select 1/*!2*/;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '2*/' at line 1
-select 1/*!000002*/;
+select 1/*!0000002*/;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '2*/' at line 1
 select 1/*!999992*/;
 1

mysql-test/t/comments.test

@@ -28,6 +28,7 @@ select 1 /*M! +1 */;
 select 1 /*M!50000 +1 */;
 select 1 /*M!50300 +1 */;
 select 2 /*M!99999 +1 */;
+select 2 /*M!100000 +1 */;
 --error ER_PARSE_ERROR
 select 2 /*M!0000 +1 */;
 
@@ -39,7 +40,7 @@ select 2 /*M!0000 +1 */;
 select 1/*!2*/;
 
 --error ER_PARSE_ERROR
-select 1/*!000002*/;
+select 1/*!0000002*/;
 
 select 1/*!999992*/;
 

sql/sql_lex.cc

@@ -1509,27 +1509,23 @@ int lex_one_token(void *arg, THD *thd)
 
       lip->save_in_comment_state();
 
-      if (lip->yyPeekn(2) == 'M' && lip->yyPeekn(3) == '!')
-      {
-        /* Skip MariaDB unique marker */
-        lip->set_echo(FALSE);
-        lip->yySkip();
-        /* The following if will be true */
-      }
-      if (lip->yyPeekn(2) == '!')
+      if (lip->yyPeekn(2) == '!' ||
+          (lip->yyPeekn(2) == 'M' && lip->yyPeekn(3) == '!'))
       {
+        bool maria_comment_syntax= lip->yyPeekn(2) == 'M';
         lip->in_comment= DISCARD_COMMENT;
         /* Accept '/' '*' '!', but do not keep this marker. */
         lip->set_echo(FALSE);
-        lip->yySkipn(3);
+        lip->yySkipn(maria_comment_syntax ? 4 : 3);
 
         /*
           The special comment format is very strict:
           '/' '*' '!', followed by an optional 'M' and exactly
-          1 digit (major), 2 digits (minor), then 2 digits (dot).
-          32302 -> 3.23.02
-          50032 -> 5.0.32
-          50114 -> 5.1.14
+          1-2 digits (major), 2 digits (minor), then 2 digits (dot).
+          32302  -> 3.23.02
+          50032  -> 5.0.32
+          50114  -> 5.1.14
+          100000 -> 10.0.0
         */
         if (  my_isdigit(cs, lip->yyPeekn(0))
            && my_isdigit(cs, lip->yyPeekn(1))
@@ -1539,14 +1535,21 @@ int lex_one_token(void *arg, THD *thd)
            )
         {
           ulong version;
-          char *end_ptr= (char*) lip->get_ptr()+5;
+          uint length= 5;
+          char *end_ptr= (char*) lip->get_ptr()+length;
           int error;
+          if (my_isdigit(cs, lip->yyPeekn(5)))
+          {
+            end_ptr++;                          // 6 digit number
+            length++;
+          }
+
           version= (ulong) my_strtoll10(lip->get_ptr(), &end_ptr, &error);
 
           if (version <= MYSQL_VERSION_ID)
           {
             /* Accept 'M' 'm' 'm' 'd' 'd' */
-            lip->yySkipn(5);
+            lip->yySkipn(length);
             /* Expand the content of the special comment as real code */
             lip->set_echo(TRUE);
             state=MY_LEX_START;