Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-4.1

into mysql.r18.ru:/usr/home/ram/work/4.1

client/mysqltest.c

@@ -204,6 +204,7 @@ Q_WAIT_FOR_SLAVE_TO_STOP,
 Q_REQUIRE_VERSION,
 Q_ENABLE_WARNINGS, Q_DISABLE_WARNINGS,
 Q_ENABLE_INFO, Q_DISABLE_INFO,
+Q_EXEC,
 Q_UNKNOWN,			       /* Unknown command.   */
 Q_COMMENT,			       /* Comments, ignored. */
 Q_COMMENT_WITH_COMMAND
@@ -267,6 +268,7 @@ const char *command_names[]=
   "disable_warnings",
   "enable_info",
   "disable_info",
+  "exec",
   0
 };
 
@@ -840,6 +842,66 @@ int do_source(struct st_query* q)
   return open_file(name);
 }
 
+/*
+  Execute given command.
+
+  SYNOPSIS
+    do_exec()
+    q	called command
+
+  DESCRIPTION
+    If one uses --exec command [args] command in .test file
+    we will execute the command and record its output.
+
+  RETURN VALUES
+    0	ok
+    1	error
+*/
+
+int do_exec(struct st_query* q)
+{
+  int error= 0;
+  DYNAMIC_STRING *ds;
+  DYNAMIC_STRING ds_tmp;
+  char buf[1024];
+  FILE *res_file;
+  char *cmd= q->first_argument;
+
+  while (*cmd && my_isspace(charset_info, *cmd))
+    cmd++;
+  if (!*cmd)
+    die("Missing argument in exec\n");
+
+  if (q->record_file[0])
+  {
+    init_dynamic_string(&ds_tmp, "", 16384, 65536);
+    ds= &ds_tmp;
+  }
+  else
+    ds= &ds_res;
+
+  if (!(res_file= popen(cmd, "r")) && q->abort_on_error)
+    die("popen() failed\n");
+  while (fgets(buf, sizeof(buf), res_file))
+    dynstr_append(ds, buf);
+  pclose(res_file);
+  if (record)
+  {
+    if (!q->record_file[0] && !result_file)
+      die("At line %u: Missing result file", start_lineno);
+    if (!result_file)
+      str_to_file(q->record_file, ds->str, ds->length);
+  }
+  else if (q->record_file[0])
+  {
+    error= check_result(ds, q->record_file, q->require_file);
+  }
+  if (ds == &ds_tmp)
+    dynstr_free(&ds_tmp);
+  
+  return error;
+}
+
 int var_query_set(VAR* v, const char* p, const char** p_end)
 {
   char* end = (char*)((p_end && *p_end) ? *p_end : p + strlen(p));
@@ -2584,6 +2646,9 @@ int main(int argc, char **argv)
       case Q_PING:
 	(void) mysql_ping(&cur_con->mysql);
 	break;
+      case Q_EXEC: 
+	(void) do_exec(q);
+	break;
       default: processed = 0; break;
       }
     }

mysql-test/mysql-test-run.sh

@@ -431,6 +431,11 @@ if [ x$SOURCE_DIST = x1 ] ; then
  else
    MYSQL_TEST="$BASEDIR/client/mysqltest"
  fi
+ if [ -f "$BASEDIR/client/.libs/mysqldump" ] ; then
+   MYSQL_DUMP="$BASEDIR/client/.libs/mysqldump --no-defaults -uroot --socket=$MASTER_MYSOCK"
+ else
+   MYSQL_DUMP="$BASEDIR/client/mysqldump --no-defaults -uroot --socket=$MASTER_MYSOCK"
+ fi
  if [ -n "$STRACE_CLIENT" ]; then
   MYSQL_TEST="strace -o $MYSQL_TEST_DIR/var/log/mysqltest.strace $MYSQL_TEST"
  fi
@@ -452,6 +457,7 @@ else
    MYSQLD="$VALGRIND $BASEDIR/bin/mysqld"
  fi
  MYSQL_TEST="$BASEDIR/bin/mysqltest"
+ MYSQL_DUMP="$BASEDIR/bin/mysqldump --no-defaults -uroot --socket=$MASTER_MYSOCK"
  MYSQLADMIN="$BASEDIR/bin/mysqladmin"
  WAIT_PID="$BASEDIR/bin/mysql_waitpid"
  MYSQL_MANAGER="$BASEDIR/bin/mysqlmanager"
@@ -469,6 +475,8 @@ else
   fi
 fi
 
+export MYSQL_DUMP
+
 if [ -z "$MASTER_MYSQLD" ]
 then
 MASTER_MYSQLD=$MYSQLD

mysql-test/r/create.result

@@ -361,3 +361,16 @@ a	b	c	d	e	f	g	h	dd
 1	-7	7	2000-01-01	b	2000-01-01 00:00:00	05:04:03	yet another binary data	02:00:00
 2	-2	2	1825-12-14	a	2003-01-01 03:02:01	04:03:02	binary data	02:00:00
 drop table t1, t2;
+drop database if exists test_$1;
+create database test_$1;
+use test_$1;
+select database();
+database()
+test_$1
+drop database test_$1;
+select database();
+database()
+NULL
+select database();
+database()
+NULL

mysql-test/t/create.test

@@ -260,3 +260,19 @@ select * from t2;
 
 drop table t1, t2;
 
+#
+# Bug #1209
+#
+
+--disable_warnings
+drop database if exists test_$1;
+--enable_warnings
+create database test_$1;
+use test_$1;
+select database();
+drop database test_$1;
+select database();
+
+# Connect without a database
+connect (user4,localhost,mysqltest_1,,*NO-ONE*);
+select database();

sql/item_strfunc.cc

@@ -1454,8 +1454,8 @@ String *Item_func_database::val_str(String *str)
   THD *thd= current_thd;
   if (!thd->db)
   {
-    str->length(0);
+    null_value= 1;
-    str->set_charset(system_charset_info);
+    return 0;
   }
   else
     str->copy((const char*) thd->db,(uint) strlen(thd->db),system_charset_info);

sql/sql_db.cc

@@ -391,6 +391,11 @@ int mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
 
 exit:
   start_waiting_global_read_lock(thd);
+  if (thd->db && !strcmp(thd->db, db))
+  {
+    x_free(thd->db);
+    thd->db= 0;
+  }
 exit2:
   VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));