From ef4bd9796f7105635c16191adda6faa06494f9c4 Mon Sep 17 00:00:00 2001
From: Konstantin Osipov <kostja@sun.com>
Date: Sat, 21 Nov 2009 01:53:50 +0300
Subject: [PATCH] Backport of:
 ------------------------------------------------------------ revno: 2597.42.4
 committer: davi@mysql.com/endora.local timestamp: Tue 2008-04-15 17:29:42
 -0300 message: Bug#36004 mysql_stmt_prepare resets the list of warnings

Although the manual says that "the list of messages is reset
for each new statement that uses a table", the list of messages
is being unconditionally reset for prepare commands.

The solution is to enforce that the prepare command will only
reset the message list if the statement being prepared uses
a table or a warning is pushed.
---
 tests/mysql_client_test.c | 45 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c
index cfe401c75f3..86906660d4c 100644
--- a/tests/mysql_client_test.c
+++ b/tests/mysql_client_test.c
@@ -18392,9 +18392,51 @@ static void test_wl4166_4()
 }
 
 /**
-  Bug#38486 Crash when using cursor protocol
+  Bug#36004 mysql_stmt_prepare resets the list of warnings
 */
 
+static void test_bug36004()
+{
+  int rc, warning_count= 0;
+  MYSQL_STMT *stmt;
+
+  DBUG_ENTER("test_bug36004");
+  myheader("test_bug36004");
+
+  rc= mysql_query(mysql, "drop table if exists inexistant");
+  myquery(rc);
+
+  DIE_UNLESS(mysql_warning_count(mysql) == 1);
+  query_int_variable(mysql, "@@warning_count", &warning_count);
+  DIE_UNLESS(warning_count);
+
+  stmt= mysql_simple_prepare(mysql, "select 1");
+  check_stmt(stmt);
+
+  DIE_UNLESS(mysql_warning_count(mysql) == 0);
+  query_int_variable(mysql, "@@warning_count", &warning_count);
+  DIE_UNLESS(warning_count);
+
+  rc= mysql_stmt_execute(stmt);
+  check_execute(stmt, rc);
+
+  DIE_UNLESS(mysql_warning_count(mysql) == 0);
+  mysql_stmt_close(stmt);
+
+  query_int_variable(mysql, "@@warning_count", &warning_count);
+  DIE_UNLESS(warning_count);
+
+  stmt= mysql_simple_prepare(mysql, "drop table if exists inexistant");
+  check_stmt(stmt);
+
+  query_int_variable(mysql, "@@warning_count", &warning_count);
+  DIE_UNLESS(warning_count == 0);
+  mysql_stmt_close(stmt);
+
+  DBUG_VOID_RETURN;
+}
+
+
 static void test_bug38486(void)
 {
   MYSQL_STMT *stmt;
@@ -19154,6 +19196,7 @@ static struct my_tests_st my_tests[]= {
   { "test_wl4166_2", test_wl4166_2 },
   { "test_wl4166_3", test_wl4166_3 },
   { "test_wl4166_4", test_wl4166_4 },
+  { "test_bug36004", test_bug36004 },
   { "test_wl4435",   test_wl4435 },
   { "test_wl4435_2", test_wl4435_2 },
   { "test_bug38486", test_bug38486 },