master update from 'release-0.5'

log_manager/log_manager.cc

@@ -674,7 +674,7 @@ static int logmanager_write_log(
                 if (use_valist) {
                         vsnprintf(wp+timestamp_len, safe_str_len, str, valist);
                 } else {
-                        snprintf(wp+timestamp_len, safe_str_len, str);
+                        snprintf(wp+timestamp_len, safe_str_len, "%s", str);
                 }
                 
                 /** write to syslog */
@@ -682,11 +682,11 @@ static int logmanager_write_log(
                 {
                         switch(id) {
                         case LOGFILE_ERROR:
-                                syslog(LOG_ERR, wp+timestamp_len);
+                                syslog(LOG_ERR, "%s", wp+timestamp_len);
                                 break;
                                 
                         case LOGFILE_MESSAGE:
-                                syslog(LOG_NOTICE, wp+timestamp_len);
+                                syslog(LOG_NOTICE, "%s", wp+timestamp_len);
                                 break;
                                 
                         default:
@@ -742,7 +742,7 @@ static int logmanager_write_log(
                                  * Copy original string from block buffer to
                                  * other logs' block buffers.
                                  */
-                                snprintf(wp_c, timestamp_len+str_len, wp);
+                                snprintf(wp_c, timestamp_len+str_len, "%s", wp);
                             
                                 /** remove double line feed */
                                 if (wp_c[timestamp_len-1+str_len-2] == '\n')

makefile.inc

@@ -22,6 +22,7 @@ ifdef DYNLIB
      LIB := libmysqld.so.18
 endif
 
+# -O2 -g -pipe -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4 -fPIC
 
 CFLAGS      := $(CFLAGS) -Wall
 LDLIBS      := $(LDLIBS) -pthread
@@ -32,7 +33,7 @@ CPP_LDLIBS  := -lstdc++
 # Compiler flags, httpd arguments and debugger options
 #
 ifdef DEBUG
-      DEBUG_FLAGS := -DSS_DEBUG
+DEBUG_FLAGS := -DSS_DEBUG -pipe -Wformat -Werror=format-security -fstack-protector --param=ssp-buffer-size=4 -fPIC
       CFLAGS      := $(CFLAGS) -ggdb -O0 -pthread $(DEBUG_FLAGS)
 endif
 

maxscale.conf

@@ -0,0 +1,2 @@
+/usr/local/sbin/MaxScale/modules
+/usr/local/sbin/lib

maxscale.spec

@@ -2,7 +2,6 @@
 %define name            maxscale
 %define release         ##RELEASE_TAG##
 %define version         ##VERSION_TAG##
-%define buildroot	%{_topdir}/%{name}-%{version}-%{release}root
 %define install_path    /usr/local/sbin/
 
 BuildRoot:              %{buildroot}
@@ -15,7 +14,7 @@ Source:                 %{name}-%{version}-%{release}.tar.gz
 Prefix:                 /
 Group:                  Development/Tools
 #Requires:        
-BuildRequires: gcc gcc-c++ ncurses-devel bison glibc-devel cmake libgcc perl make libtool openssl-devel
+BuildRequires: gcc gcc-c++ ncurses-devel bison glibc-devel cmake libgcc perl make libtool openssl-devel libaio MariaDB-devel MariaDB-server
 
 %description
 MaxScale
@@ -25,22 +24,27 @@ MaxScale
 %setup -q
 
 %build
-MARIADB_SRC_PATH=/home/ec2-user/.jenkins/jobs/MariaDB_for_MaxScale/workspace
+ln -s /lib64/libaio.so.1 /lib64/libaio.so
-make ROOT_PATH=`pwd` MARIADB_SRC_PATH=$MARIADB_SRC_PATH depend
+make ROOT_PATH=`pwd` HOME="" clean
-make ROOT_PATH=`pwd` MARIADB_SRC_PATH=$MARIADB_SRC_PATH
+make ROOT_PATH=`pwd` HOME="" depend
-make DEST=`pwd`/binaries ROOT_PATH=`pwd` MARIADB_SRC_PATH=$MARIADB_SRC_PATH install
+make ROOT_PATH=`pwd` HOME=""
+make DEST=`pwd`/binaries ROOT_PATH=`pwd` HOME="" ERRMSG="/usr/share/mysql/english"  install
 
 %post
+ln -s /lib64/libaio.so.1 /lib64/libaio.so
+/sbin/ldconfig
 
 %install
+mkdir -p $RPM_BUILD_ROOT/etc/ld.so.conf.d/
 mkdir -p $RPM_BUILD_ROOT%{install_path}
 cp -r binaries/* $RPM_BUILD_ROOT%{install_path}
+cp maxscale.conf $RPM_BUILD_ROOT/etc/ld.so.conf.d/
 
 %clean
 
 %files
 %defattr(-,root,root)
 %{install_path}
+/etc/ld.so.conf.d/maxscale.conf
 
 %changelog
-

query_classifier/query_classifier.cc

@@ -73,6 +73,9 @@ static bool create_parse_tree(
 
 static skygw_query_type_t resolve_query_type(
         THD* thd);
+static bool skygw_stmt_causes_implicit_commit(
+        LEX* lex, 
+        uint mask);
 
 /** 
  * @node (write brief function description here) 
@@ -393,6 +396,44 @@ static skygw_query_type_t resolve_query_type(
                 type = QUERY_TYPE_SESSION_WRITE;
                 goto return_qtype;
         }
+        
+        if (skygw_stmt_causes_implicit_commit(lex, CF_AUTO_COMMIT_TRANS))
+        {
+                if (LOG_IS_ENABLED(LOGFILE_TRACE))
+                {
+                        if (sql_command_flags[lex->sql_command] & 
+                                CF_IMPLICT_COMMIT_BEGIN)
+                        {
+                                skygw_log_write(
+                                        LOGFILE_TRACE,
+                                        "Implicit COMMIT before executing the "
+                                        "next command.");
+                        }
+                        else if (sql_command_flags[lex->sql_command] & 
+                                CF_IMPLICIT_COMMIT_END)
+                        {
+                                skygw_log_write(
+                                        LOGFILE_TRACE,
+                                        "Implicit COMMIT after executing the "
+                                        "next command.");
+                        }
+                }
+                type |= QUERY_TYPE_COMMIT;
+        }
+        /**
+        * REVOKE ALL, ASSIGN_TO_KEYCACHE,
+        * PRELOAD_KEYS, FLUSH, RESET, CREATE|ALTER|DROP SERVER
+        */
+        if (lex->option_type == OPT_GLOBAL)
+        {
+                type |= QUERY_TYPE_GLOBAL_WRITE;
+                goto return_qtype;
+        }
+        else if (lex->option_type == OPT_SESSION)
+        {
+                type |=  QUERY_TYPE_SESSION_WRITE;
+                goto return_qtype;
+        }
         /**
          * 1:ALTER TABLE, TRUNCATE, REPAIR, OPTIMIZE, ANALYZE, CHECK.
          * 2:CREATE|ALTER|DROP|TRUNCATE|RENAME TABLE, LOAD, CREATE|DROP|ALTER DB,
@@ -415,26 +456,10 @@ static skygw_query_type_t resolve_query_type(
             
                 goto return_qtype;
         }
-
-        /**
-         * REVOKE ALL, ASSIGN_TO_KEYCACHE,
-         * PRELOAD_KEYS, FLUSH, RESET, CREATE|ALTER|DROP SERVER
-         */
-        if (sql_command_flags[lex->sql_command] & CF_AUTO_COMMIT_TRANS) {
-                if (lex->option_type == OPT_GLOBAL)
-                {
-                        type |= (QUERY_TYPE_GLOBAL_WRITE|QUERY_TYPE_COMMIT);
-                }
-                else
-                {
-                        type |=  (QUERY_TYPE_SESSION_WRITE|QUERY_TYPE_COMMIT);
-                }
-                goto return_qtype;
-        }
         
         /** Try to catch session modifications here */
         switch (lex->sql_command) {
-                case SQLCOM_SET_OPTION:
+                case SQLCOM_SET_OPTION: /*< SET commands. */
                         if (lex->option_type == OPT_GLOBAL)
                         {
                                 type |= QUERY_TYPE_GLOBAL_WRITE;
@@ -622,3 +647,34 @@ return_qtype:
         qtype = (skygw_query_type_t)type;
         return qtype;
 }
+
+static bool skygw_stmt_causes_implicit_commit(LEX* lex, uint mask)
+{
+        bool succp;
+       
+        if (!(sql_command_flags[lex->sql_command] & mask))
+        {
+                succp = false;
+                goto return_succp;
+        }
+        
+        switch (lex->sql_command) {
+                case SQLCOM_DROP_TABLE:
+                        succp = !(lex->drop_temporary);
+                        break;
+                case SQLCOM_ALTER_TABLE:
+                case SQLCOM_CREATE_TABLE:
+                        /* If CREATE TABLE of non-temporary table, do implicit commit */
+                        succp = !(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE);
+                        break;
+                case SQLCOM_SET_OPTION:
+                        succp = lex->autocommit ? true : false;
+                        break;
+                default:
+                        succp = true;
+                        break;
+        }
+        
+return_succp:
+        return succp;
+}

script/make-binary-tarball.sh

@@ -22,7 +22,7 @@ else
 	exit 1
 fi
 
-MAXSCALE_BINARY_TARFILE=maxscale.preview.${MAXSCALE_VERSION}.tar
+MAXSCALE_BINARY_TARFILE=maxscale.${MAXSCALE_VERSION}.tar
 TARFILE_BASEDIR=maxscale-${MAXSCALE_VERSION}
 TARFILE_BASEDIR_SUBST='s,^\.,'${TARFILE_BASEDIR}','
 

script/make-source-tarball.sh

@@ -39,7 +39,7 @@ else
 	exit 1
 fi
 
-MAXSCALE_SOURCE_TARFILE=maxscale.src.preview.${MAXSCALE_VERSION}.tar
+MAXSCALE_SOURCE_TARFILE=maxscale.src.${MAXSCALE_VERSION}.tar
 TARFILE_BASEDIR=maxscale-${MAXSCALE_VERSION}
 TARFILE_BASEDIR_SUBST='s,^\.,'${TARFILE_BASEDIR}','
 

server/MaxScale_template.cnf

@@ -72,24 +72,29 @@ router=debugcli
 # 	service=<name of service defined elsewhere>
 # 	protocol=<name of protocol module with which to listen>
 # 	port=<Listening port>
+#	address=<Address to bind to>
+#	socket=<Listening socket>
 
 [RW Split Listener]
 type=listener
 service=RW Split Router
 protocol=MySQLClient
 port=4006
+#socket=/tmp/rwsplit.sock
 
 [Read Connection Listener]
 type=listener
 service=Read Connection Router
 protocol=MySQLClient
 port=4008
+#socket=/tmp/readconn.sock
 
 [Debug Listener]
 type=listener
 service=Debug Interface
 protocol=telnetd
 port=4442
+#address=127.0.0.1
 
 [HTTPD Listener]
 type=listener

server/core/dbusers.c

@@ -304,7 +304,7 @@ getUsers(SERVICE *service, struct users *users)
 	}
 	num_fields = mysql_num_fields(result);
 	
-	users_data = (char *)malloc(nusers * (users_data_row_len * sizeof(char)) + 1);
+	users_data = (char *)calloc(nusers, (users_data_row_len * sizeof(char)) + 1);
 
 	if(users_data == NULL)
 		return -1;
@@ -571,7 +571,7 @@ char *mysql_format_user_entry(void *data)
 	if (entry->ipv4.sin_addr.s_addr == INADDR_ANY) {
 		snprintf(mysql_user, mysql_user_len, "%s@%%", entry->user);
 	} else {
-		snprintf(mysql_user, MYSQL_USER_MAXLEN, entry->user);
+		strncpy(mysql_user, entry->user, MYSQL_USER_MAXLEN);
 		strcat(mysql_user, "@");
 		inet_ntop(AF_INET, &(entry->ipv4).sin_addr, mysql_user+strlen(mysql_user), INET_ADDRSTRLEN);
 	}

server/modules/routing/readwritesplit/readwritesplit.c

@@ -670,6 +670,13 @@ static int routeQuery(
                                 "Packet type\t%s",
                                 STRPACKETTYPE(packet_type))));
         
+        if (QUERY_IS_TYPE(qtype,QUERY_TYPE_COMMIT) &&
+                transaction_active)
+        {
+                transaction_active = false;
+        }
+                
+        
         switch (qtype) {
         case QUERY_TYPE_WRITE:
                 LOGIF(LT, (skygw_log_write(
@@ -724,12 +731,6 @@ static int routeQuery(
                 break;
 
         case QUERY_TYPE_SESSION_WRITE:
-        case (QUERY_TYPE_SESSION_WRITE|QUERY_TYPE_COMMIT):
-                if (QUERY_IS_TYPE(qtype,QUERY_TYPE_COMMIT) &&
-                        transaction_active)
-                {
-                        transaction_active = false;
-                }
                 /**
                  * Execute in backends used by current router session.
                  * Save session variable commands to router session property

server/modules/routing/readwritesplit/test/makefile

@@ -0,0 +1,41 @@
+# cleantests 	- clean local and subdirectories' tests
+# buildtests	- build all local and subdirectories' tests
+# runtests	- run all local tests 
+# testall	- clean, build and run local and subdirectories' tests
+
+include ../../../../../build_gateway.inc
+include $(ROOT_PATH)/makefile.inc
+include $(ROOT_PATH)/test.inc
+
+CC=cc
+TESTLOG := $(shell pwd)/testrouters.log
+RET := -1
+
+cleantests:
+	- $(DEL) *.o 
+	- $(DEL) *~
+
+
+testall: 
+	-$(MAKE) cleantests
+	-$(MAKE) DEBUG=Y buildtests
+	-$(MAKE) runtests
+
+buildtests:
+
+
+runtests:
+	@echo ""				>> $(TESTLOG)
+	@echo "-------------------------------"	>> $(TESTLOG)
+	@echo $(shell date)			>> $(TESTLOG)
+	@echo "Test MaxScale R/W Split"		>> $(TESTLOG)
+	@echo "-------------------------------"	>> $(TESTLOG)
+	./rwsplit.sh $(TESTLOG) $(THOST) $(TPORT_RW) $(TMASTER_ID) $(TUSER) $(TPWD) 
+	@echo ""                        >> $(TESTLOG)
+
+
+pesce:
+	@echo "fine"
+
+
+	

server/modules/routing/readwritesplit/test/rwsplit.sh

@@ -0,0 +1,115 @@
+#!/bin/sh
+NARGS=6
+TLOG=$1
+THOST=$2
+TPORT=$3
+TMASTER_ID=$4
+TUSER=$5
+TPWD=$6
+
+if [ $# != $NARGS ] ;
+then
+echo""
+echo "Wrong number of arguments, gave "$#" but "$NARGS" is required"
+echo "" 
+echo "Usage :" 
+echo "        rwsplit.sh <log filename> <host> <port> <master id> <user> <password>"
+echo ""
+exit 1
+fi
+
+
+RUNCMD=mysql\ --host=$THOST\ -P$TPORT\ -u$TUSER\ -p$TPWD\ --unbuffered=true\ --disable-reconnect\ --silent
+
+TINPUT=test_transaction_routing2.sql
+TRETVAL=0
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" != "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when $TRETVAL was expected">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_transaction_routing3.sql
+TRETVAL=2
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" != "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when $TRETVAL was expected">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+# set a var via SELECT INTO @, get data from master, returning server-id: put master server-id value in TRETVAL
+TINPUT=select_for_var_set.sql
+TRETVAL=$TMASTER_ID
+
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" != "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when $TRETVAL was expected">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit1.sql
+TRETVAL=$TMASTER_ID
+
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit2.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit3.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit4.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" != "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when $TRETVAL was expected">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit5.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit6.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi
+
+TINPUT=test_implicit_commit7.sql
+TRETVAL=$TMASTER_ID
+a=`$RUNCMD < ./$TINPUT`
+if [ "$a" == "$TRETVAL" ]; then 
+        echo "$TINPUT FAILED, return value $a when it was not accetable">>$TLOG; 
+else 
+        echo "$TINPUT PASSED">>$TLOG ; 
+fi

server/modules/routing/readwritesplit/test/select_for_var_set.sql

@@ -0,0 +1,5 @@
+-- simple read with variable from master
+BEGIN;
+SELECT (@@server_id) INTO @a;
+SELECT @a;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit1.sql

@@ -0,0 +1,8 @@
+DROP DATABASE If EXISTS FOO;
+SET autocommit=0;
+BEGIN;
+CREATE DATABASE FOO; -- implicit commit
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP DATABASE If EXISTS FOO;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit2.sql

@@ -0,0 +1,15 @@
+USE test;
+DROP TABLE IF EXISTS T1;
+DROP EVENT IF EXISTS myevent;
+SET autocommit=0;
+BEGIN;
+CREATE TABLE T1 (id integer);
+CREATE EVENT myevent
+ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR
+DO
+UPDATE t1 SET id = id + 1;
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP TABLE IF EXISTS T1;
+DROP EVENT IF EXISTS myevent;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit3.sql

@@ -0,0 +1,9 @@
+USE test;
+DROP TABLE IF EXISTS T1;
+SET autocommit=0;
+BEGIN;
+CREATE TABLE T1 (id integer); -- implicit commit
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP TABLE IF EXISTS T1;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit4.sql

@@ -0,0 +1,9 @@
+USE test;
+DROP TABLE IF EXISTS T1;
+SET autocommit=0;
+BEGIN;
+CREATE TEMPORARY TABLE T1 (id integer); -- NO implicit commit
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from master
+DROP TABLE IF EXISTS T1;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit5.sql

@@ -0,0 +1,14 @@
+USE test;
+DROP PROCEDURE IF EXISTS simpleproc;
+SET autocommit=0;
+BEGIN;
+DELIMITER //
+CREATE PROCEDURE simpleproc (OUT param1 INT)
+BEGIN
+    SELECT COUNT(*) INTO param1 FROM t;
+END //
+DELIMITER ;
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP PROCEDURE IF EXISTS simpleproc;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit6.sql

@@ -0,0 +1,11 @@
+USE test;
+DROP FUNCTION IF EXISTS hello;
+SET autocommit=0;
+BEGIN;
+CREATE FUNCTION hello (s CHAR(20))
+RETURNS CHAR(50) DETERMINISTIC
+RETURN CONCAT('Hello, ',s,'!'); -- implicit COMMIT
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP FUNCTION IF EXISTS hello;
+COMMIT;

server/modules/routing/readwritesplit/test/test_implicit_commit7.sql

@@ -0,0 +1,10 @@
+USE test;
+DROP TABLE IF EXISTS T1;
+CREATE TABLE T1 (id integer); -- implicit commit
+SET autocommit=0;
+BEGIN;
+CREATE INDEX foo_t1 on T1 (id); -- implicit commit
+SELECT (@@server_id) INTO @a;
+SELECT @a; --should read from slave
+DROP TABLE IF EXISTS T1;
+COMMIT;

server/modules/routing/readwritesplit/test/test_transaction_routing1.sql

@@ -0,0 +1,19 @@
+USE test; 
+SET autocommit = 0; 
+SET @a= -1; 
+SET @b= -2; 
+START TRANSACTION; 
+CREATE TABLE IF NOT EXISTS myCity (a int, b char(20)); 
+INSERT INTO myCity VALUES (1, 'Milan'); 
+INSERT INTO myCity VALUES (2, 'London'); 
+COMMIT; 
+START TRANSACTION; 
+DELETE FROM myCity; 
+SET @a = (SELECT COUNT(*) FROM myCity); 
+ROLLBACK; 
+START TRANSACTION; 
+SET @b = (SELECT COUNT(*) FROM myCity); 
+START TRANSACTION; 
+DROP TABLE myCity; 
+SELECT (@a+@b) AS res; 
+COMMIT;

server/modules/routing/readwritesplit/test/test_transaction_routing2.sql

@@ -0,0 +1,11 @@
+USE test; 
+SET autocommit = 0; 
+START TRANSACTION; 
+CREATE TABLE IF NOT EXISTS myCity (a int, b char(20)); 
+INSERT INTO myCity VALUES (1, 'Milan'); 
+INSERT INTO myCity VALUES (2, 'London'); 
+COMMIT; 
+START TRANSACTION; 
+DELETE FROM myCity;
+SELECT COUNT(*) FROM myCity; -- read transaction's modifications from master
+COMMIT;

server/modules/routing/readwritesplit/test/test_transaction_routing3.sql

@@ -0,0 +1,10 @@
+USE test; 
+SET autocommit = 0; 
+START TRANSACTION; 
+CREATE TABLE IF NOT EXISTS myCity (a int, b char(20)); 
+INSERT INTO myCity VALUES (1, 'Milan'); 
+INSERT INTO myCity VALUES (2, 'London'); 
+COMMIT;
+DELETE FROM myCity;
+SELECT COUNT(*) FROM myCity; -- read transaction's modifications from slave
+COMMIT;

test.inc

@@ -0,0 +1,35 @@
+#
+# This file includes parameters needed for running tests and may be included
+# in makefiles in test directories if seen useful.
+# 
+# hostname or IP address of MaxScale's host, for example:
+#
+# THOST         := 127.0.0.1
+#
+THOST           := 
+
+#
+# port of read connection router module, for example:
+# TPORT_RCONN   := 4008
+#
+TPORT_RCONN     :=
+#
+# port of read/write split router module, for example:
+# TPORT_RW      := 4006
+#
+TPORT_RW        :=
+#
+# username of MaxScale user, for example:
+# TUSER         := maxuser
+#
+TUSER           :=
+#
+# password of MaxScale user, for example:
+# TPWD          := maxpwd
+#
+TPWD            :=
+#
+# master's server_id, for example:
+# TMASTER_ID    := 2
+#
+TMASTER_ID      :=