fix for bug #12490 (all-in-one patch)

(Packets out of order if calling HELP CONTENTS from Stored Procedure)


mysql-test/r/sp-error.result:
  results of test of bug 12490
mysql-test/t/sp-error.test:
  test for bug 12490
  (Packets out of order if calling HELP CONTENTS from Stored Procedure)
sql/sql_yacc.yy:
  disable HELP in SP
  (fixes bug 12490)

mysql-test/r/sp-error.result

@@ -748,6 +748,14 @@ end|
 call bug11394(2, 1)|
 ERROR HY000: Recursive stored routines are not allowed.
 drop procedure bug11394|
+CREATE PROCEDURE BUG_12490() HELP CONTENTS;
+ERROR 0A000: HELP is not allowed in stored procedures
+CREATE FUNCTION BUG_12490() RETURNS INT HELP CONTENTS;
+ERROR 0A000: HELP is not allowed in stored procedures
+CREATE TABLE t_bug_12490(a int);
+CREATE TRIGGER BUG_12490 BEFORE UPDATE ON t_bug_12490 FOR EACH ROW HELP CONTENTS;
+ERROR 0A000: HELP is not allowed in stored procedures
+DROP TABLE t_bug_12490;
 drop function if exists bug11834_1;
 drop function if exists bug11834_2;
 create function bug11834_1() returns int return 10;

mysql-test/t/sp-error.test

@@ -1079,6 +1079,19 @@ call bug11394(2, 1)|
 drop procedure bug11394|
 delimiter ;|
 
+
+#
+# BUG 12490 (Packets out of order if calling HELP CONTENTS from Stored Procedure)
+#
+--error 1314
+CREATE PROCEDURE BUG_12490() HELP CONTENTS;
+--error 1314
+CREATE FUNCTION BUG_12490() RETURNS INT HELP CONTENTS;
+CREATE TABLE t_bug_12490(a int);
+--error 1314
+CREATE TRIGGER BUG_12490 BEFORE UPDATE ON t_bug_12490 FOR EACH ROW HELP CONTENTS;
+DROP TABLE t_bug_12490;
+
 #
 # Bug#11834 "Re-execution of prepared statement with dropped function
 # crashes server". Also tests handling of prepared stmts which use

sql/sql_yacc.yy

@@ -1016,11 +1016,19 @@ execute_var_ident: '@' ident_or_text
 /* help */
 
 help:
-       HELP_SYM ident_or_text
+       HELP_SYM
+       {
+         if (Lex->sphead)
+         {
+           my_error(ER_SP_BADSTATEMENT, MYF(0), "HELP");
+           YYABORT;
+         }
+       }
+       ident_or_text
        {
 	  LEX *lex= Lex;
 	  lex->sql_command= SQLCOM_HELP;
-	  lex->help_arg= $2.str;
+	  lex->help_arg= $3.str;
        };
 
 /* change master */