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Enhanced compatibility with native mysql-connector-java(JDBC) (#10021)

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* Skip the `/* comments */ SELECT @@variables ...` from mysql-connector-java setup for MySQL Handler #9336

mysql-connector setup query:
/* mysql-connector-java-5.1.38 ( Revision: ${revinfo.commit} ) */SELECT  @@session.auto_increment_increment AS auto_increment_increment, @@character_set_client AS character_set_client, @@character_set_connection AS character_set_connection, @@character_set_results AS character_set_results, @@character_set_server AS character_set_server, @@init_connect AS init_connect, @@interactive_timeout AS interactive_timeout...

ClickHouse side Error:
{} <Error> executeQuery: Code: 62, e.displayText() = DB::Exception: Syntax error: failed at position 74: @@session.auto_increment_increment AS auto_increment_increment, @@character_set_client AS character_set_client, @@character_set_connection AS character_set_conn. Expected one of: CAST, NULL...

Client side Exception:
java.sql.SQLException: Syntax error: failed at position 74: @@session.auto_increment_increment AS auto_increment_increment, @@character_set_client AS character_set_client, @@character_set_connection AS character_set_conn. Expected one of: CAST...

* add repalce 'SHOW VARIABLES' for mysql-connector-java-5.1.34 #9336

* Add java client(JDBC) integration test to test_mysql_protocol

* shift out java tests from dbms

* Update MySQLHandler.cpp

* Update MySQLHandler.cpp

* test_mysql_protocol: add Test.java exit code 1 when expection

Co-authored-by: alexey-milovidov <milovidov@yandex-team.ru>
This commit is contained in:
BohuTANG 2020-04-09 05:52:19 +08:00 committed by GitHub
parent 5e336ba063
commit f48fdda678
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 165 additions and 7 deletions
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33
programs/server/MySQLHandler.cpp
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@ -16,6 +16,7 @@
#include <IO/WriteBufferFromPocoSocket.h>
#include <Storages/IStorage.h>
#include <boost/algorithm/string/replace.hpp>
#include <regex>
#if USE_POCO_NETSSL
#include <Poco/Net/SecureStreamSocket.h>
@ -268,7 +269,8 @@ void MySQLHandler::comPing()
packet_sender->sendPacket(OK_Packet(0x0, client_capability_flags, 0, 0, 0), true);
}
static bool isFederatedServerSetupCommand(const String & query);
static bool isFederatedServerSetupSetCommand(const String & query);
static bool isFederatedServerSetupSelectVarCommand(const String & query);
void MySQLHandler::comQuery(ReadBuffer & payload)
{
@ -276,7 +278,7 @@ void MySQLHandler::comQuery(ReadBuffer & payload)
// This is a workaround in order to support adding ClickHouse to MySQL using federated server.
// As Clickhouse doesn't support these statements, we just send OK packet in response.
if (isFederatedServerSetupCommand(query))
if (isFederatedServerSetupSetCommand(query))
{
packet_sender->sendPacket(OK_Packet(0x00, client_capability_flags, 0, 0, 0), true);
}
@ -288,10 +290,11 @@ void MySQLHandler::comQuery(ReadBuffer & payload)
// Translate query from MySQL to ClickHouse.
// This is a temporary workaround until ClickHouse supports the syntax "@@var_name".
if (query == "select @@version_comment limit 1") // MariaDB client starts session with that query
if (isFederatedServerSetupSelectVarCommand(query))
{
should_replace = true;
}
// This is a workaround in order to support adding ClickHouse to MySQL using federated server.
if (0 == strncasecmp("SHOW TABLE STATUS LIKE", query.c_str(), 22))
{
@ -358,11 +361,27 @@ void MySQLHandlerSSL::finishHandshakeSSL(size_t packet_size, char * buf, size_t
#endif
static bool isFederatedServerSetupCommand(const String & query)
static bool isFederatedServerSetupSetCommand(const String & query)
{
return 0 == strncasecmp("SET NAMES", query.c_str(), 9) || 0 == strncasecmp("SET character_set_results", query.c_str(), 25)
|| 0 == strncasecmp("SET FOREIGN_KEY_CHECKS", query.c_str(), 22) || 0 == strncasecmp("SET AUTOCOMMIT", query.c_str(), 14)
|| 0 == strncasecmp("SET SESSION TRANSACTION ISOLATION LEVEL", query.c_str(), 39);
static const std::regex expr{
"(^(SET NAMES(.*)))"
"|(^(SET character_set_results(.*)))"
"|(^(SET FOREIGN_KEY_CHECKS(.*)))"
"|(^(SET AUTOCOMMIT(.*)))"
"|(^(SET sql_mode(.*)))"
"|(^(SET SESSION TRANSACTION ISOLATION LEVEL(.*)))"
, std::regex::icase};
return 1 == std::regex_match(query, expr);
}
static bool isFederatedServerSetupSelectVarCommand(const String & query)
{
static const std::regex expr{
"|(^(SELECT @@(.*)))"
"|(^((/\\*(.*)\\*/)([ \t]*)(SELECT([ \t]*)@@(.*))))"
"|(^((/\\*(.*)\\*/)([ \t]*)(SHOW VARIABLES(.*))))"
, std::regex::icase};
return 1 == std::regex_match(query, expr);
}
const String MySQLHandler::show_table_status_replacement_query("SELECT"

15
tests/integration/test_mysql_protocol/clients/java/0.reference Normal file
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@ -0,0 +1,15 @@
33jdbc
44ck
0
1
2
3
4
5
6
7
8
9
10
11
12

18
tests/integration/test_mysql_protocol/clients/java/Dockerfile Normal file
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@ -0,0 +1,18 @@
FROM ubuntu:18.04
RUN apt-get update && \
apt-get install -y software-properties-common build-essential openjdk-8-jdk libmysql-java curl
RUN rm -rf \
/var/lib/apt/lists/* \
/var/cache/debconf \
/tmp/* \
RUN apt-get clean
ARG ver=5.1.46
RUN curl -L -o /mysql-connector-java-${ver}.jar https://repo1.maven.org/maven2/mysql/mysql-connector-java/${ver}/mysql-connector-java-${ver}.jar
ENV CLASSPATH=$CLASSPATH:/mysql-connector-java-${ver}.jar
WORKDIR /jdbc
COPY Test.java Test.java
RUN javac Test.java

76
tests/integration/test_mysql_protocol/clients/java/Test.java Normal file
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@ -0,0 +1,76 @@
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
class JavaConnectorTest {
private static final String CREATE_TABLE_SQL = "CREATE TABLE IF NOT EXISTS default.test1 (age Int32, name String) Engine = Memory";
private static final String INSERT_SQL = "INSERT INTO default.test1 VALUES(33, 'jdbc'),(44, 'ck')";
private static final String SELECT_SQL = "SELECT * FROM default.test1";
private static final String SELECT_NUMBER_SQL = "SELECT * FROM system.numbers LIMIT 13";
private static final String DROP_TABLE_SQL = "DROP TABLE default.test1";
public static void main(String[] args) {
int i = 0;
String host = "127.0.0.1";
String port = "9004";
String user = "default";
String password = "";
String database = "default";
while (i < args.length) {
switch (args[i]) {
case "--host":
host = args[++i];
break;
case "--port":
port = args[++i];
break;
case "--user":
user = args[++i];
break;
case "--password":
password = args[++i];
break;
case "--database":
database = args[++i];
break;
default:
i++;
break;
}
}
String jdbcUrl = String.format("jdbc:mysql://%s:%s/%s?maxAllowedPacket=67108864&useSSL=false", host, port, database);
Connection conn = null;
Statement stmt = null;
try {
conn = DriverManager.getConnection(jdbcUrl, user, password);
stmt = conn.createStatement();
stmt.executeUpdate(CREATE_TABLE_SQL);
stmt.executeUpdate(INSERT_SQL);
ResultSet rs = stmt.executeQuery(SELECT_SQL);
while (rs.next()) {
System.out.print(rs.getString("age"));
System.out.print(rs.getString("name"));
System.out.println();
}
stmt.executeUpdate(DROP_TABLE_SQL);
rs = stmt.executeQuery(SELECT_NUMBER_SQL);
while (rs.next()) {
System.out.print(rs.getString(1));
System.out.println();
}
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
System.exit(1);
}
}
}

8
tests/integration/test_mysql_protocol/clients/java/docker_compose.yml Normal file
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@ -0,0 +1,8 @@
version: '2.2'
services:
java1:
build:
context: ./
network: host
# to keep container running
command: sleep infinity

22
tests/integration/test_mysql_protocol/test.py
View File

@ -79,6 +79,13 @@ def nodejs_container():
yield docker.from_env().containers.get(cluster.project_name + '_mysqljs1_1')
@pytest.fixture(scope='module')
def java_container():
docker_compose = os.path.join(SCRIPT_DIR, 'clients', 'java', 'docker_compose.yml')
subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
yield docker.from_env().containers.get(cluster.project_name + '_java1_1')
def test_mysql_client(mysql_client, server_address):
# type: (Container, str) -> None
code, (stdout, stderr) = mysql_client.exec_run('''
@ -266,6 +273,21 @@ def test_mysqljs_client(server_address, nodejs_container):
assert code == 1
def test_java_client(server_address, java_container):
# type: (str, Container) -> None
with open(os.path.join(SCRIPT_DIR, 'clients', 'java', '0.reference')) as fp:
reference = fp.read()
code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user user_with_empty_password --database '
'abc'.format(host=server_address, port=server_port), demux=True)
assert code == 1
code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user user_with_empty_password --database '
'default'.format(host=server_address, port=server_port), demux=True)
assert code == 0
assert stdout == reference
def test_types(server_address):
client = pymysql.connections.Connection(host=server_address, user='default', password='123', database='default', port=server_port)