Bug #20772273 : MYSQLIMPORT --USE-THREADS DOESN'T USE

                MULTIPLE THREADS

Description:- The utility "mysqlimport" does not use
multiple threads for the execution with option
"--use-threads". "mysqlimport" while importing multiple
files and multiple tables, uses a single thread even if the
number of threads are specified with "--use-threads" option.

Analysis:- This utility uses ifdef HAVE_LIBPTHREAD to check
for libpthread library and if defined uses libpthread
library for mutlithreaing. Since HAVE_LIBPTHREAD is not
defined anywhere in the source, "--use-threads" option is
silently ignored.

Fix:- "-DTHREADS" is set to the COMPILE_FLAGS  which will
enable pthreads. HAVE_LIBPTHREAD macro is removed.

client/CMakeLists.txt

-# Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved.
 # 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -51,6 +51,7 @@ MYSQL_ADD_EXECUTABLE(mysqldump mysqldump.c ../sql-common/my_user.c)
 TARGET_LINK_LIBRARIES(mysqldump mysqlclient)
 
 MYSQL_ADD_EXECUTABLE(mysqlimport mysqlimport.c)
+SET_SOURCE_FILES_PROPERTIES(mysqlimport.c PROPERTIES COMPILE_FLAGS "-DTHREADS")
 TARGET_LINK_LIBRARIES(mysqlimport mysqlclient)
 
 MYSQL_ADD_EXECUTABLE(mysql_upgrade mysql_upgrade.c)

client/mysqlimport.c

 /*
-   Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+   Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -24,19 +24,14 @@
 
 #include "client_priv.h"
 #include "mysql_version.h"
-#ifdef HAVE_LIBPTHREAD
-#include <my_pthread.h>
-#endif
 
 #include <welcome_copyright_notice.h>   /* ORACLE_WELCOME_COPYRIGHT_NOTICE */
 
 
 /* Global Thread counter */
 uint counter;
-#ifdef HAVE_LIBPTHREAD
 pthread_mutex_t counter_mutex;
 pthread_cond_t count_threshhold;
-#endif
 
 static void db_error_with_table(MYSQL *mysql, char *table);
 static void db_error(MYSQL *mysql);
@@ -548,7 +543,6 @@ static char *field_escape(char *to,const char *from,uint length)
 
 int exitcode= 0;
 
-#ifdef HAVE_LIBPTHREAD
 pthread_handler_t worker_thread(void *arg)
 {
   int error;
@@ -588,7 +582,6 @@ pthread_handler_t worker_thread(void *arg)
 
   return 0;
 }
-#endif
 
 
 int main(int argc, char **argv)
@@ -607,7 +600,6 @@ int main(int argc, char **argv)
     return(1);
   }
 
-#ifdef HAVE_LIBPTHREAD
   if (opt_use_threads && !lock_tables)
   {
     pthread_t mainthread;            /* Thread descriptor */
@@ -661,7 +653,6 @@ int main(int argc, char **argv)
     pthread_attr_destroy(&attr);
   }
   else
-#endif
   {
     MYSQL *mysql= 0;
     if (!(mysql= db_connect(current_host,current_db,current_user,opt_password)))

mysql-test/r/mysqldump.result

@@ -5255,3 +5255,31 @@ SET @@global.general_log=      @old_general_log_state;
 #
 # End of 5.1 tests
 #
+#
+# Bug #20772273 : MYSQLIMPORT --USE-THREADS DOESN'T USE MULTIPLE THREADS
+#
+CREATE DATABASE db_20772273;
+USE db_20772273;
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES (1), (2);
+CREATE TABLE t2(a INT);
+INSERT INTO t2 VALUES (3), (4);
+SELECT * FROM t1;
+a
+1
+2
+SELECT * FROM t2;
+a
+3
+4
+SELECT * FROM t1;
+a
+1
+2
+SELECT * FROM t2;
+a
+3
+4
+DROP TABLE t1;
+DROP TABLE t2;
+DROP DATABASE db_20772273;

mysql-test/t/mysqldump.test

@@ -2401,3 +2401,32 @@ SET @@global.general_log=      @old_general_log_state;
 --echo #
 --echo # End of 5.1 tests
 --echo #
+
+--echo #
+--echo # Bug #20772273 : MYSQLIMPORT --USE-THREADS DOESN'T USE MULTIPLE THREADS
+--echo #
+
+CREATE DATABASE db_20772273;
+USE db_20772273;
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES (1), (2);
+CREATE TABLE t2(a INT);
+INSERT INTO t2 VALUES (3), (4);
+
+SELECT * FROM t1;
+SELECT * FROM t2;
+
+--exec $MYSQL_DUMP --tab=$MYSQLTEST_VARDIR/tmp/ db_20772273
+--exec $MYSQL db_20772273 < $MYSQLTEST_VARDIR/tmp/t1.sql
+--exec $MYSQL db_20772273 < $MYSQLTEST_VARDIR/tmp/t2.sql
+
+# Test mysqlimport with multiple threads
+--exec $MYSQL_IMPORT --silent --use-threads=2 db_20772273 $MYSQLTEST_VARDIR/tmp/t1.txt $MYSQLTEST_VARDIR/tmp/t2.txt
+
+SELECT * FROM t1;
+SELECT * FROM t2;
+
+#Cleanup
+DROP TABLE t1;
+DROP TABLE t2;
+DROP DATABASE db_20772273;