Enterprise Edition

Overview of GridDB and information for first time users

— Introduction —

Contents of this manual

This manual explains the outline and simple usage of GridDB to those who use GridDB for the first time, illustrating installation of GridDB in a PC, starting and stopping, and data manipulation.

Subsequent chapters deal with the following topics:

  • Introduction
    This section describes GridDB products. Also outlines “nodes and clusters”, and “containers and rows” which are the basics of GridDB architecture data model.

  • Installation of GridDB
    This section describes the operating procedures to install GridDB in a PC. Follow the procedures below and install GridDB.

  • Starting/stopping
    This section explains operations to start/stop GridDB. The operations using operating commands are introduced from among some operational methods of GridDB.

  • Data operation
    This section describes simple data manipulations using gs_sh commands for various operations of GridDB, and gs_import commands for importing data. A series of basic operations are explained, including connecting with a cluster, creating a container, data registration, and data search.

  • Executing a sample program
    GridDB provides some sample programs to create a container and data registration. Building and executing sample programs are explained.

  • Uninstallation of GridDB
    This section describes the uninstallation procedure of GridDB.

What is GridDB?

GridDB is a database which allows a vast quantity of data to be stored and searched quickly and safely..

As a retail version of GridDB, GridDB Enterprise Edition (hereafter referred to as “GridDB EE”) features:

  • High speed data management using in-memory processing.
  • Large capacity by scaling out
  • High reliability by performing data replication, storing backup data in a physical disk, and using data transaction functions.
  • Easy operation by using autonomous management of adding and deleting nodes in a cluster
  • Providing NoSQL interfaces for batch processing big data at high speed and NewSQL interfaces where SQL is available.

The SQL function is based on SQL92 and JDBC (Java Database Connectivity) and ODBC (Open Database Connectivity) are available, which allows direct access to a database from BI (Business Intelligence) tools or ETL (Extract Transfer Load) tools.

The interfaces available:

GridDB EE
Java API
C API
JDBC
ODBC

Structure of GridDB

This chapter explains “A node and a cluster”, and “a container and a row” which are the basics of GridDB architecture data model.

A node and a cluster

A “node” refers to a server process to perform data management in GridDB. Only one node can operate in one machine.

GridDB is operated in “clusters” which are composed of multiple nodes. To access a database from an application, the nodes have to be started up and the cluster service has to be initiated.

Cluster service is started when the number of nodes joining the cluster becomes the same as the number of nodes constituting a cluster. Cluster service will not be started and access to the database from the application will not be possible until all the nodes constituting a cluster have joined the cluster.

A cluster needs to be composed even when operating with only one node. In this case, the number of nodes constituting a cluster is one and is called “Single configuration”. A cluster needs a “cluster name"so that it can be identified even if multiple clusters exist on the network. Using this “cluster name”, a node or an application identifies the cluster.

Cluster name and number of nodes constituting a cluster
Cluster name and number of nodes constituting a cluster

Data model - what is a container and a row -

GridDB uses a unique key container type data model, which is extended from a key value type, a typical data model of NoSQL. It has the following features:

  • A concept resembling a RDB table, named “container”, has been introduced to manage data.
  • A schema to define the data type for the container can be set. An index can be set in a column.
  • Guarantees the ACID characteristic of data for each container.
Data model
Data model
  • Container

    A container of data of two types: a collection and a timeseries container.

    • Collection
      • The container for managing general data
    • Timeseries container
      • The container for managing time series data

    Be sure to create a container before registering data using an application.

  • Row
    A row refers to a row of data to be registered in a container. Multiple rows are registered in a container.

Explanation of terms

Explanation of terms used in this manual.

Terms Meaning
Node A server process to perform data management in GridDB.
Cluster Refers to a single or a set of multiple nodes to perform data management together.
Container A container to manage a set of rows. There are two types: collections and time series containers. There are two types: collections and time series containers.
Collection A type of container that manages rows containing general key.
Timeseries container A type of container that manages rows containing time-series key. It has a special function to handle time-series data.
Row A chunk of data managed in GridDB, which consists of a key and multiple values.

— Installation of GridDB —

Install and use GridDB in the following way:

  1. Checking before installation
  2. Installation of GridDB
  3. Environmental settings

Checking before installation

Checking the OS version

Check the OS of the machine to install GridDB in meets the requirements of GridDB. More specifically, check that the OS is RHEL, CentOS, or Ubuntu Server and the version is the one specified in the release notes.

[Example for checking the version of RHEL and CentOS]

$ cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)

[Example for checking the version of Ubuntu Server]

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.2 LTS"

[Memo]

  • In choosing OS package groups during RHEL/CentOS installation, at least “Basic Server” needs to be chosen.

Checking the Python version

Before installing the package, install Python 3.6 or later.

[Example for checking the Python version]

$ python3 --version

[Notes]

  • If Python is not installed, installation of the package fails.

Checking the installation media

The installation media contains a package for each OS.

/RHEL/    # RPM package for RHEL and CentOS
		griddb-ee-c-lib-X.X.X-linux.x86_64.rpm
		griddb-ee-client-X.X.X-linux.x86_64.rpm
		griddb-ee-go-lib-X.X.X-linux.x86_64.rpm
		griddb-ee-java-lib-X.X.X-linux.x86_64.rpm
		griddb-ee-nodejs-lib-X.X.X-linux.x86_64.rpm
		griddb-ee-python-lib-X.X.X-linux.x86_64.rpm
		griddb-ee-server-X.X.X-linux.x86_64.rpm
		griddb-ee-webapi-X.X.X-linux.x86_64.rpm
		griddb-ee-webui-X.X.X-linux.x86_64.rpm
/Ubuntu/  # deb package for Ubuntu Server
		griddb-ee-c-lib_X.X.X_amd64.deb
		griddb-ee-client_X.X.X_amd64.deb
		griddb-ee-go-lib_X.X.X_amd64.deb
		griddb-ee-java-lib_X.X.X_amd64.deb
		griddb-ee-nodejs-lib_X.X.X_amd64.deb
		griddb-ee-python-lib_X.X.X_amd64.deb
		griddb-ee-server_X.X.X_amd64.deb
		griddb-ee-webapi_X.X.X_amd64.deb
		griddb-ee-webui_X.X.X_amd64.deb
/Windows/ # C-API, JDBC, and ODBC for Windows
		C-API/	
		JDBC/
		ODBC/
/misc/    # database file migration tool, samples, and others
		convdbv4tov5/
		ansible-template/
		dockerfile-sample/
		zabbix-template/
/Fixlist.pdf
/Readme.txt

*: X.X.X indicates the GridDB version.

Installation of GridDB

Installation of a package.

Install the GridDB packages, which include a server package, an operation tool package, and a library package.

Type Package name File name Description
Server griddb-ee-server griddb-ee-server-X.X.X-linux.x86_64.rpm
griddb-ee-server_X.X.X_amd64.deb
The start commands of a node and other node modules are included.
Operation tool griddb-xx-client griddb-ee-client-X.X.X-linux.x86_64.rpm
griddb-ee-client_X.X.X_amd64.deb
Operating tools except for start node, Backup/restoration, operation control GUI are included.
Java application development library griddb-ee-java_lib griddb-ee-java-lib-X.X.X-linux.x86_64.rpm
griddb-ee-java-lib_X.X.X_amd64.deb
Java and JDBC library are included.
C application development library griddb-ee-c_lib griddb-ee-c-lib-X.X.X-linux.x86_64.rpm
griddb-ee-c-lib_X.X.X_amd64.deb
C header file and library are included. (Install these if needed)

*: X.X.X indicates the GridDB version.

[Memo]

  • The application development library provides the package of programming languages other than C and Java. Install them if needed.

Place the packages above in any directory on the machine to install GridDB. Install the packages using a command. Install the server package “griddb-ee-server” first.

[Example for installing the package in CentOS]

$ sudo rpm -Uvh griddb-ee-server-X.X.X-linux.x86_64.rpm
Preparing...                ########################################### [100%]
User gsadm and group gridstore have been registered.
GridDB uses new user and group.
   1:griddb-ee-server          ########################################### [100%]
$
$ sudo rpm -Uvh griddb-ee-client-X.X.X-linux.x86_64.rpm
Preparing...                ########################################### [100%]
User and group has already been registered correctly.
GridDB uses existing user and group.
   1:griddb-ee-client          ########################################### [100%]
$
$ sudo rpm -Uvh griddb-ee-java-lib-X.X.X-linux.x86_64.rpm
Preparing...                ########################################### [100%]
   1:griddb-ee-java-lib        ########################################### [100%]
$
$ sudo rpm -Uvh griddb-ee-c-lib-X.X.X-linux.x86_64.rpm
Preparing...                ########################################### [100%]
   1:griddb-ee-c-lib           ########################################### [100%]

[Memo]

  • For Ubuntu Server, install the package using dpkg.
$ sudo dpkg -i griddb-ee-server_X.X.X_amd64.deb

Users and the directory hierarchy after installation

The following user and directories are created after the installation.

User

OS Group gridstore and a user gsadm are created. Use the user gsadm as the operator of GridDB.

User Group GridDB home directory
gsadm gridstore /var/lib/gridstore

The following environment variables are defined for this gsadm user.

Environment variables Value Meaning
GS_HOME /var/lib/gridstore User gsadm/GridDB home directory
GS_LOG /var/lib/gridstore/log The output directory of the event log file of a node

Directory hierarchy

The following two directories are created: GridDB home directory which contains files such as a node definition file and database files, the installation directory which contains the installed files.

GridDB home directory

/var/lib/gridstore/                      # GridDB home directory
                   admin/                # gs_admin home directory
                   backup/               # Backup directory
                   conf/                 # Definition files directory
                        gs_cluster.json  # Cluster definition file
                        gs_node.json     # Node definition file
                        password         # User definition file
                   data/                 # Data file, checkpoint log directory
                   txnlog/               # Transaction log directory
                   expimp/               # Export/Import tools directory
                   log/                  # Log directory
                   webapi/               # Web API directory

Installation directory

/usr/griddb/                            # GridDB installation directory
            Readme.txt
            bin/                        # Operating command, module directory
            conf/                       # Sample definition file directory
                 gs_cluster.json.tmpl   # Cluster definition file sample
                 gs_cluster.json.tmpl   # Node definition file sample
                 password.tmpl          # User definition file sample
            etc/
            lib/                        # Library directory
            license/                    # License directory
            prop/                       # Configuration file directory
            sample/                     # Sample program
/usr/griddb-webui/                      # Integrated operational management GUI installation directory
/usr/griddb-webapi/                     # Web API installation directory

[Memo]

  • When a node is started or a tool is executed, a database file or a log file will be created under the following directories.
    /var/lib/gridstore/data                # Database file directory
    /var/lib/gridstore/log                 # Log directory
    

Environmental settings

Network settings

GridDB uses multicast communication to constitute a cluster. Set the network to enable multicast communication.

First, check the host name and an IP address. Execute “hostname -i” command to check the settings of an IP address of the host. When the IP address of the machine is displayed as in the following example, the network setting is already done, so skip the procedures in this section.

  • [Example]
    $ hostname -i
    192.168.11.10
    

When the following message or the loopback addresses 127.0.0.1 is displayed, the setting has not been configured. Follow the following procedures from 1 to 3.

  • [Example]
    $ hostname -i
    hostname: no IP address was found for this hostname.
    
    or
    $ hostname -i
    127.0.0.1
    

Network settings

  1. Check the host name and OS IP address.
  • Check the host name.

    [Example]

    $ hostname
    MY_HOST
    
  • Check the IP address.

    [Example]

    $ ip -f inet -o addr show eth0 | cut -d' ' -f 7 | cut -d/ -f 1
    192.168.11.10
    
  1. Assign the hostname to the IP address.
  • Add the host name and IP address, which were checked in the procedure 1, to the /etc/hosts file as a root user.

    [Example of description in the file]

    192192.168.11.10   MY_HOST
    
  1. Check the setting.
  • Execute “hostname -i” command to check the settings of an IP address of the host. Check that the IP address specified in the procedure 2 is displayed.

    [Example]

    $ hostname -i
    192.168.11.10
    

Setting the system resource limit

Change the upper limit for the number of processes the gsadm user can use and for the number of files the gsadm user can open to make resources available as much as possible. Set the value in /etc/security/limits.conf.

[Example for setting limits.conf]

gsadm soft nproc 16384
gsadm hard nproc 16384
gsadm soft nofile 65536
gsadm hard nofile 65536

Log in as gsadm again to update the settings. Verify the settings using ulimit -a.

Setting parameters of a node

To operate GridDB after installation, initial setting of parameters, such as addresses and the cluster name, is required. In this manual, only “Cluster name”, an essential item, is set and for other items default values are used.

Describe “Cluster name” of a cluster in the cluster definition file. A cluster definition file is “/var/lib/gridstore/conf/gs_cluster.json.”

Write the cluster name after “:” of ““clusterName”:””" as “myCluster”, the example used in this manual.

[Example of description in the file]

{
        "dataStore":{
                "partitionNum":128,
                "storeBlockSize":"64KB"
        },
        "cluster":{
                "clusterName":"myCluster",
                "replicationNum":2,
....

[Memo]

  • Using a cluster name, which is unique on the sub network is recommended.
  • A cluster name must be composed of one or more ASCII alphanumeric characters or the underscore “_”. A number is not accepted as the first character of the name. The name is also not case-sensitive. The maximum length of the name must be 64 characters.

Configuration items

Except for network settings and the cluster name, GridDB can operate with the default setting values. The main setting items are shown below. Use the values below when executing the tools in the following sections.

Setting items Value
IP address The IP address displayed when executing “hostname -i” command
Cluster name myCluster
Multicast address 239.0.0.1 (Default value)
Multicast port number 31999 (Default value)
User name admin (Default value)
User password admin (Default value)
Multicast address 239.0.0.1 (Default value)
Multicast port number 41999 (Default value)

Initial setting of operation tools

Some operation tools require initial settings. Initial settings of gs_sh and gs_import, used for data manipulation, are explained in this section. (When not using these tools, skip this section.)

Setting gs_sh command

gs_sh is a command line interface of GridDB for cluster operation or data manipulation. It provides functions for batch operations on cluster nodes, data manipulation functions, including creating a container, TQL search and SQL search.

Set the connection information to a cluster in the configuration file of gs_sh “/var/lib/gridstore/.gsshrc” before using a gs_sh command.

Use a setcluster subcommand and a setuser subcommand to define the connection destination address of a cluster, or the user name that are used for the connection. Specify the default values except for the cluster variables and the cluster name. Describe “/var/lib/gridstore/.gsshrc” file as follows.

[Example of description in the file]

setcluster cluster myCluster 239.0.0.1 31999
setuser admin admin
  • Cluster information definition subcommand

    • setcluster
      • Cluster variable: cluster
      • Cluster name: myCluster
      • Multicast address: 239.0.0.1 (Default value)
      • Multicast port number: 31999 (Default value)
  • User information definition subcommand

    • setuser
      • User name: admin (Default value)
      • Password: admin (Default value)

Also define the information about the connection destination of SQL. Specify the default values except for the cluster variables and the cluster name. Describe the file as follows.

[Example of description in the file]

setcluster cluster myCluster 239.0.0.1 31999
setclustersql cluster myCluster 239.0.0.1 41999
setuser admin admin
  • Cluster information (SQL) definition subcommand
    • setclustersql
      • Cluster variable: cluster
      • Cluster name: myCluster
      • SQL address: 239.0.0.1 (Default value)
      • SQL port number: 41999 (Default value)

Setting gs_import command

gs_import is a command for importing data to a container.

Describe information, such as cluster address, in a property file in advance. The property file is “/var/lib/gridstore/expimp/conf/gs_expimp.properties.”

Describe the cluster name (“myCluster” in this manual) right next to “clusterName=” in the property file.

[Example of description in the file]

clusterName=myCluster
mode=MULTICAST
hostAddress=239.0.0.1
hostPort=31999
...

— Starting/stopping —

Start/stop a GridDB node and a cluster. Starting/stopping operations using operating commands are introduced from among some operational methods of GridDB.

A list of operating commands

Command Function
gs_startnode Starting a node
gs_joincluster Add a node to a cluster.
gs_leavecluster Detach a node from a cluster
gs_stopcluster Stopping a cluster
gs_stopnode Stop a node (shutdown)
gs_stat Get node internal data

[Points to note]

  • Execute the operating command as a gsadm user.
    • Example
      # su - gsadm
      $ pwd
      /var/lib/gridstore
      
  • If a proxy variable (http_proxy) has been set up, set the node address(es) in no_proxy and exclude it/them from the proxy target. Otherwise, since the operating command uses REST/http communications, it will connect to the proxy server and will fail to operate.
    • Example of setting
      $ export no_proxy=localhost,127.0.0.1,192.168.10.11,192.168.10.12,192.168.10.13
      

Starting operations

The normal starting procedures of GridDB, after the installation and setting up, is as follows.

  1. Starting a node
  2. Starting a cluster

As explained in “a node and a cluster” section, GridDB cluster is formed when the number of nodes specified by the user joins the cluster and then the cluster service is started. Cluster service will not be started and access to the cluster from the application will not be possible until all the nodes constituting a cluster have joined the cluster.

The example in this manual is “single configuration” using one node. Start up a node, add the node to a cluster and then start the cluster.

Starting a node

Use the following command to start a node.

  • gs_startnode -u <user name>/<password> -w

    • Specify the user name and the password of admin, the management user, along with the user authentication option -u, and specify -w option to wait wait for the node to start.

[Example]

$ gs_startnode -u admin/admin -w

Starting a cluster

Execute a command to join the cluster at each node and start the cluster. Use the following command to start the cluster.

  • gs_joincluster -u <user name>/<password> -w -c <cluster name>

    • Specify the user name and password of admin, the management user, along with the user authentication option -u, and specify -w option to wait until the starting up of the cluster. Specify a cluster name with -c option.

[Example]

$ gs_joincluster -u admin/admin –w -c myCluster

After starting the cluster, check the cluster status. Use the following command to check the state.

  • gs_stat -u <user name>/<password>

    • Specify the user name and the password of admin, the management user, with the user authentication option -u. To check the status of a cluster, extract the lines including “Status” using grep command.

[Example]

$ gs_stat -u admin/admin | grep Status
        "clusterStatus": "MASTER",
        "nodeStatus": "ACTIVE",
        "partitionStatus": "NORMAL"

If the three status displayed by “gs_stat” command are the ones in the above example, the cluster has started normally. The cluster has becme accessible from an application.

Stopping operations

Basic flow

The stopping procedures of GridDB is as follows.

  1. Stopping a cluster
  2. Stopping a node

Contrary to the startup procedures, stop the cluster first and then stop the each node. When the cluster is stopped, it becomes inaccessible from the applications.

Stopping a cluster

Execute the following cluster stop command. When the cluster stop command is executed, the cluster becomes inaccessible from the applications.

  • gs_stopcluster -u <user name>/<password> -w

    • Specify the user name and the password of admin, the management user, along with the user authentication option -u, and specify -w option to wait until the cluster has stopped.

[Example]

$ gs_stopcluster -u admin/admin -w

Stopping a node

Execute the node stop command to stop, or shutdown, a node. Be sure to stop the cluster before stopping a node.

  • gs_stopnode -u <user name>/<password> -w

    • Specify the user name and the password of admin, the management user, along with the user authentication option -u, and specify -w option to wait until the node is stopped.

[Example]

$ gs_stopnode -u admin/admin -w

— Data operation —

This chapter explains how to manipulate GridDB data. The following basic operations using gs_sh commands and a gs_import command will be explained.

  1. Connecting to a cluster (using a gs_sh command)
  2. Creating a container (using a gs_sh command)
  3. Registering a row (using a gs_import command)
  4. Executing a TQL search (using a gs_import command)
  5. Executing a SQL search (using a gs_import command)

Connecting to a cluster

Connect to a cluster using a gs_sh command. When gs_sh is started, “gs>” prompt will be displayed in a state waiting for the input of a subcommand. To connect to a cluster, use a subcommand “connect.”

  • Subcommand to connect
    • connect
      • The first argument: $cluster, the cluster variable defined using setcluster command

[Example]

$ gs_sh
gs>
gs> connect $cluster
The connection attempt was successful (NoSQL)
gs[public]>

Creating a container

What is a container

As explained in “Data model - what is a container and a row -”, GridDB manages data using a “container”, which contains data. A container has a definition of schemas, such as columns and data types. Be sure to create a container before registering data using an application.

  • Container type

    • There are two types of containers. Use the one which serves the purpose.
      • Collection: The container for managing general data
      • Timeseries container: The container for managing time series data
  • Column data type

    • The types of column data types are as follows.
      • Basic data types

        • Boolean type (BOOL)
        • Character string (STRING)
        • Integer type
          • BYTE
          • SHORT
          • INTEGER
          • LONG
        • Floating point type
          • FLOAT
          • DOUBLE
        • Time type (TIMESTAMP)
        • Spatial type (GEOMETRY)
        • BLOB
      • HYBRID

        • Array type
          • An array of boolean type, character string type, integer type, floating point type, time type

Creating a container

Create a container of the type “collection” with the columns “id” (integer type) and “value” (string type).

  • Collection creation subcommand

    • createcollection [ …]

    [Example] Execute a subcommand “createcollection” to create a container with the container name “mycollection”, columns “id” (integer type) and “value” (string type).

    gs[public]> createcollection mycollection id integer value string
    
  • Container list display subcommand

    • showcontainer

    [Example] Execute the subcommand “showcontainer” and check the created container.

    gs[public]> showcontainer
    Database : public
    Name               Type		     PartitionId
    ----------------------------------------------------------------
    mycollection         COLLECTION           59
    
    Total Count: 1  
    

Registering a row

“Row” refers to a row of data registered in a container or table. Import sample data and register a row. Unzip and import the sample data.

[Example]

$ cd /usr/griddb/sample/ja/data/
$ unzip impSample.zip

Import the data in impSample/collection.

[Example]

$ cd impSample/collection
$ gs_import -u admin/admin --all
Start importing
Number of target containers: 1

public.c001: 5

The number of target containers: 1 (Success :1 Failure : 0)
Importing terminated

Execute a TQL search on a container and display the result. Execute a TQL search using the subcommands “tql” and “get” of gs_sh command.

  • tql: Search the row of a container with a TQL query.
  • get: Display the result of TQL.

Search the container named “c001.”

Execute the search after connecting to the cluster. First, execute the subcommand “tql” and execute a TQL search on a container “c001”.

  • TQL execution subcommand

    • tql ;

    [Example]

    gs[public]> tql c001 select * where count > 20;
    3 results.  (26 ms)
    

Next, execute the subcommand “get” and display the result.

  • The subcommand to get the TQL execution result

    • get

    [Example]

    gs[public]> get
    name,status,count
    tokyo,false,100
    iwate,false,30
    akita,false,45
    The 3 results had been acquired.
    

Execute an SQL search no a table and display the result. Execute an SQL search using the subcommands “sql” and “get” of a gs_sh command.

  • sql: Search NewSQL data (a table and a time series table) using an SQL query.
  • get: Display the result of SQL (unnecessary, when displaying all the search results).

Search the container named “c001.” Execute the search after connecting to the cluster. Execute the subcommand “sql” and execute an SQL search on a container “c001”.

  • SQL execution subcommand

    • sql <SQL query>;

    [Example]

    gs[public]> sql select * from c001 where count > 20 and count < 80;
    2 results.  (179 ms)
    

Next, execute the subcommand “get” and display the result.

  • The subcommand to get the SQL execution result

    • get

    [Example]

    gs[public]> get
    name,status,count
    iwate,false,30
    akita,false,45
    The 2 results had been acquired.
    

— Executing a sample program —

Sample programs using Java API and JDBC are available. Building and executing sample programs are explained.

The sample programs are in /usr/griddb/sample.

Execution of a sample program using Java API

The following package needs to be installed to run the sample program using Java API.

  • Application development library (Java) package: griddb-ee-java-lib

A sample program is in the following directory.

/usr/griddb/sample/ja/java

Specify the following libraries in the environment variable CLASSPATH to compile and execute the sample program.

/usr/share/java/gridstore.jar

[Example]

Compile and run the program.

$ export CLASSPATH=${CLASSPATH}:/usr/share/java/gridstore.jar:.
$ javac TQLSelect.java
$ java TQLSelect

Sample program “TQLSelect.java” is a program to execute the following processes.

  • Connecting to a cluster
  • Creating a container
  • Registering a row
  • Executing a TQL search
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import com.toshiba.mwcloud.gs.Collection;
import com.toshiba.mwcloud.gs.ColumnInfo;
import com.toshiba.mwcloud.gs.Container;
import com.toshiba.mwcloud.gs.ContainerInfo;
import com.toshiba.mwcloud.gs.GSType;
import com.toshiba.mwcloud.gs.GridStore;
import com.toshiba.mwcloud.gs.GridStoreFactory;
import com.toshiba.mwcloud.gs.Query;
import com.toshiba.mwcloud.gs.Row;
import com.toshiba.mwcloud.gs.RowSet;

public class TQLSelect {

    public static void main(String[] args){
        try {
            //===============================================
            // Connecting to a cluster
            //===============================================
            // Specifying connection information (Multicast method)
            Properties prop = new Properties();
            prop.setProperty("notificationAddress", "239.0.0.1");
            prop.setProperty("notificationPort", "31999");
            prop.setProperty("clusterName", "myCluster");
            prop.setProperty("database", "public");
            prop.setProperty("user", "admin");
            prop.setProperty("password", "admin");
            prop.setProperty("applicationName", "SampleJava");

            // Generating a GridStore object
            GridStore store = GridStoreFactory.getInstance().getGridStore(prop);
            // Connecting to a cluster when a container is creted or acquired.
            store.getContainer("dummyContainer");

            //===============================================
            // Creating a container
            //===============================================
            String containerName = "SampleJava_TQLSelect";
            createContainerPutRow(store, containerName);

            //===============================================
            // Executing a TQL search
            //===============================================
            // (1) Getting a Container object
            Container<?, Row> container = store.getContainer(containerName);
            if ( container == null ){
                throw new Exception("Container not found.");
            }

            // (2) Executing a TQL query
            Query<Row> query = container.query("SELECT * WHERE count >= 50 ORDER BY id");
            RowSet<Row> rs = query.fetch();

            // (3) Acquiring a result in a row
            while ( rs.hasNext() ) {
                Row row = rs.next();
                int id = row.getInteger(0);
                String name = row.getString(1);
                int count = row.getInteger(2);
                System.out.println("row id=" + id + ", name=" + name + ", count=" + count);
            }

            //===============================================
            // Terminating process
            //===============================================
            rs.close();
            query.close();
            container.close();
            store.close();
            System.out.println("success!");

        } catch ( Exception e ){
            e.printStackTrace();
        }
    }

    private static void createContainerPutRow(GridStore store, String containerName) throws Exception {
        // Creating a container
        ContainerInfo containerInfo = new ContainerInfo();
        List<ColumnInfo> columnList = new ArrayList<ColumnInfo>();
        columnList.add(new ColumnInfo("id", GSType.INTEGER));
        columnList.add(new ColumnInfo("productName", GSType.STRING));
        columnList.add(new ColumnInfo("count", GSType.INTEGER));
        containerInfo.setColumnInfoList(columnList);
        containerInfo.setRowKeyAssigned(true);

        Collection<Void, Row> collection = store.putCollection(containerName, containerInfo, false);
        System.out.println("Create Collection name=" + containerName);


        // Registering a row
        String[] nameList = {"notebook PC", "desktop PC", "keyboard", "mouse", "printer"};
        int[] numberList = {108, 72, 25, 45, 62};

        List<Row> rowList = new ArrayList<Row>();
        for ( int i = 0; i < nameList.length; i++ ){
            Row row = collection.createRow();
            row.setInteger(0, i);
            row.setString(1, nameList[i]);
            row.setInteger(2, numberList[i]);
            rowList.add(row);
        }
        collection.put(rowList);
    }
}

Execution of a sample program using C API

The following package needs to be installed to run the sample program using C API.

  • Application development library (C) package: griddb-ee-c-lib

A sample program is in the following directory.

/usr/griddb/sample/ja/c

Specify the following libraries in the environment variable LD_LIBRARY_PATH to compile and execute the sample program.

/usr/lib64

[Example]

Compile and run the program.

$ export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/lib64
$ gcc -lgridstore -o TQLSelect TQLSelect.c
$ ./TQLSelect

Sample program “TQLSelect.c” is a program to execute the following processes.

  • Connecting to a cluster
  • Creating a container
  • Registering a row
  • Executing a TQL search
#include "gridstore.h"
#include <stdlib.h>
#include <stdio.h>


void main(int argc, char *argv[]){

    /* constant */
    // container name
    const GSChar * containerName = "SampleC_TQLSelect";

    // Row data to register (number of rows in a container: 5)
    const int rowCount = 5;
    const GSChar * nameList[5] = {"notebook PC", "desktop PC", "keyboard", "mouse", "printer"};
    const int numberList[5] = {108, 72, 25, 45, 62};

    // TQL query
    const GSChar * queryStr = "SELECT * WHERE count >= 50 ORDER BY id";


    /* variable */
    GSGridStore *store = NULL;
    GSContainer *container;
    GSResult ret;
    int i;
    int j;

    // For creating a container
    GSContainerInfo info0 = GS_CONTAINER_INFO_INITIALIZER;
    GSColumnInfo columnInfo = GS_COLUMN_INFO_INITIALIZER;
    GSColumnInfo columnInfoList[3]; // The number of columns: 3

    // For Row registration
    GSRow *row;
    GSRow * rowList[5];
    const void * const * rowObj;

    // For error processing
    size_t stackSize;
    GSResult errorCode;
    GSChar errMsgBuf1[1024], errMsgBuf2[1024];  // The buffer to store error messages

    // For executing a query
    GSQuery *query;
    GSRowSet *rs;
    GSBool exist;


    //===============================================
    // Connecting to a cluster
    //===============================================
    // Specifying connection information (Multicast method)
    const GSPropertyEntry props[] = {
        { "notificationAddress", "239.0.0.1" },
        { "notificationPort", "31999" },
        { "clusterName", "myCluster" },
        { "database", "public" },
        { "user", "admin" },
        { "password", "admin" },
        { "applicationName", "SampleC" }
    };
    const size_t propCount = sizeof(props) / sizeof(*props);

    // Getting a GridStore instance
    ret = gsGetGridStore(gsGetDefaultFactory(), props, propCount, &store);
    if ( !GS_SUCCEEDED(ret) ){
        fprintf(stderr, "ERROR gsGetGridStore\n");
        goto LABEL_ERROR;
    }
    // Connecting to a cluster after a container is creted or acquired
    ret = gsGetContainerGeneral(store, "containerName", &container);
    if ( !GS_SUCCEEDED(ret) ){
        fprintf(stderr, "ERROR gsGetContainerGeneral\n");
        goto LABEL_ERROR;
    }
    gsCloseContainer(&container, GS_TRUE);
    printf("Connect to Cluster\n");



    //===============================================
    // Data preparation (creating a container creation & registering rows)
    //===============================================
    {
        // Setting up container information
        info0.type = GS_CONTAINER_COLLECTION;
        info0.rowKeyAssigned = GS_TRUE;

        columnInfo.name = "id";
        columnInfo.type = GS_TYPE_INTEGER;
        columnInfoList[0] = columnInfo;

        columnInfo.name = "productName";
        columnInfo.type = GS_TYPE_STRING;
        columnInfoList[1] = columnInfo;

        columnInfo.name = "count";
        columnInfo.type = GS_TYPE_INTEGER;
        columnInfoList[2] = columnInfo;

        info0.columnCount = sizeof(columnInfoList) / sizeof(*columnInfoList);
        info0.columnInfoList = columnInfoList;

        // Creating a collection
        ret = gsPutContainerGeneral(store, containerName, &info0, GS_FALSE, &container);
        if ( !GS_SUCCEEDED(ret) ){
            fprintf(stderr, "ERROR gsPutCollectionGeneral\n");
            goto LABEL_ERROR;
        }
        printf("Sample data generation: Create Collection name=%s\n", containerName);

        for ( i = 0; i < rowCount; i++ ){
            // Generating an empty row object
            gsCreateRowByContainer(container, &row);

            // Setting values to the row object
            gsSetRowFieldByInteger(row, 0, i);
            gsSetRowFieldByString(row, 1, nameList[i]);
            gsSetRowFieldByInteger(row, 2, numberList[i]);

            rowList[i] = row;
        }
        rowObj = (void *)rowList;

        // Registering multiple rows
        ret = gsPutMultipleRows(container, rowObj, rowCount, NULL);
        if ( !GS_SUCCEEDED(ret) ){
            fprintf(stderr, "ERROR gsPutMultipleRows\n");
            goto LABEL_ERROR;
        }
        printf("Sample data generation: Put Rows count=%d\n", rowCount);

        gsCloseContainer(&container, GS_TRUE);
    }


    //===============================================
    // Executing a TQL search
    //===============================================
    // (1) Getting a container
    ret = gsGetContainerGeneral(store, containerName, &container);
    if ( !GS_SUCCEEDED(ret) ){
        fprintf(stderr, "ERROR gsGetContainerGeneral\n");
        goto LABEL_ERROR;
    }
    if ( container == NULL ){
        fprintf(stderr, "ERROR Container not found. name=%s\n", containerName);
        goto LABEL_ERROR;
    }

    // (2) Executing a TQL search
    printf("TQL query : %s\n", queryStr);
    ret = gsQuery(container, queryStr, &query);
    if ( !GS_SUCCEEDED(ret) ){
        fprintf(stderr, "ERROR gsQuery\n");
        goto LABEL_ERROR;
    }
    ret = gsFetch(query, GS_FALSE, &rs);
    if ( !GS_SUCCEEDED(ret) ){
        fprintf(stderr, "ERROR gsFetch\n");
        goto LABEL_ERROR;
    }

    // (3) Creatning an empty row
    gsCreateRowByContainer(container, &row);

    // (4) Getting a result
    while (gsHasNextRow(rs)) {
        int id;
        const GSChar *productName;
        int count;


        // (5) Getting a row
        ret = gsGetNextRow(rs, row);
        if ( !GS_SUCCEEDED(ret) ){
            fprintf(stderr, "ERROR gsGetNextRow\n");
            goto LABEL_ERROR;
        }

        gsGetRowFieldAsInteger(row, 0, &id);
        gsGetRowFieldAsString(row, 1, &productName);
        gsGetRowFieldAsInteger(row, 2, &count);

        printf("TQL result: id=%d, productName=%s, count=%d\n", id, productName, count);
    }


    //===============================================
    // Terminating process
    //===============================================
    // Releasing resources
    gsCloseGridStore(&store, GS_TRUE);
    printf("success!\n");
    return;


LABEL_ERROR:
    //===============================================
    // Error processing
    //===============================================
    // Outputting error codes and error messages
    stackSize = gsGetErrorStackSize(store);
    for ( i = 0; i < stackSize; i++ ){
        errorCode = gsGetErrorCode(store, i);
        gsFormatErrorMessage(store, i, errMsgBuf1, sizeof(errMsgBuf1));
        gsFormatErrorLocation(store, i, errMsgBuf2, sizeof(errMsgBuf2));
        fprintf(stderr, "[%d] %s (%s)\n", errorCode, errMsgBuf1, errMsgBuf2);
    }

    // Releasing resources
    gsCloseGridStore(&store, GS_TRUE);
    return;

}

Execution of a sample program using JDBC

The following package needs to be installed to run the sample program using JDBC API.

  • Application development library (Java) package: griddb-ee-java-lib

A sample program is in the following directory.

/usr/griddb/sample/ja/jdbc/

Specify the following libraries in the environment variable CLASSPATH to compile and execute the sample program.

/usr/share/java/gridstore-jdbc.jar

[Example]

Compile and run the program.

$ export CLASSPATH=${CLASSPATH}:/usr/share/java/gridstore-jdbc.jar:.
$ javac JDBCSelect.java
$ java JDBCSelect

Sample program “JDBCSelect.java” is a program to execute the following processing.

  • Connecting to a cluster
  • Creating a container
  • Registering a row
  • Executing an SQL search
import java.net.URLEncoder;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Properties;

public class JDBCSelect {

    public static void main(String[] args){
        try {
            //===============================================
            // Connecting to a cluster
            //===============================================
            // Connection information of JDBC
            String jdbcAddress = "239.0.0.1";
            String jdbcPort = "41999";
            String clusterName = "myCluster";
            String databaseName = "public";
            String username = "admin";
            String password = "admin";
            String applicationName = "SampleJDBC";

            // Encoding a cluster name and a database name
            String encodeClusterName = URLEncoder.encode(clusterName, "UTF-8");
            String encodeDatabaseName = URLEncoder.encode(databaseName, "UTF-8");

            // Creating a URL (Multicast method)
            String jdbcUrl = "jdbc:gs://"+jdbcAddress+":"+jdbcPort+"/"+encodeClusterName+"/"+encodeDatabaseName;

            Properties prop = new Properties();
            prop.setProperty("user", username);
            prop.setProperty("password", password);
            prop.setProperty("applicationName", applicationName);

            // Connecting
            Connection con = DriverManager.getConnection(jdbcUrl, prop);

            //===============================================
            // Creating a container and registering data
            //===============================================
            {
                Statement stmt = con.createStatement();

                // (Delete the container if it already exists)
                stmt.executeUpdate("DROP TABLE IF EXISTS SampleJDBC_Select");

                // Creating a container
                stmt.executeUpdate("CREATE TABLE IF NOT EXISTS SampleJDBC_Select ( id integer PRIMARY KEY, value string )");
                System.out.println("SQL Create Table name=SampleJDBC_Select");

                // Registering a row
                int ret1 = stmt.executeUpdate("INSERT INTO SampleJDBC_Select values "+
                                            "(0, 'test0'),(1, 'test1'),(2, 'test2'),(3, 'test3'),(4, 'test4')");
                System.out.println("SQL Insert count=" + ret1);

                stmt.close();
            }

            //===============================================
            // Executing a search
            //===============================================
            // (1) Creating a statement
            Statement stmt = con.createStatement();

            // (2) Executing a SQL command
            ResultSet rs = stmt.executeQuery("SELECT * from SampleJDBC_Select where ID > 2");

            // (3) Getting a result
            while( rs.next() ){
                int id = rs.getInt(1);
                String value = rs.getString(2);
                System.out.println("SQL row(id=" + id + ", value=" + value + ")");
            }

            //===============================================
            // Terminating process
            //===============================================
            stmt.close();
            con.close();
            System.out.println("success!");

        } catch ( Exception e ){
            e.printStackTrace();
        }
    }
}

— Uninstallation of GridDB —

Uninstall all packages if GridDB is no longer required. Follow the procedure below to uninstall the packages.

[Example for uninstalling the package in CentOS]

$ sudo rpm -e griddb-ee-server
$ sudo rpm -e griddb-ee-client
$ sudo rpm -e griddb-ee-java-lib
$ sudo rpm -e griddb-ee-c-lib

[Memo] In Ubuntu Server, use dpkg to uninstall the package.

$ sudo dpkg -r griddb-ee-server

[Notes]

  • Files such as definition files and data files etc. that are stored under the GridDB home directory will not be uninstalled. (In Ubuntu Server, a message may be displayed warning that the directory cannot be removed and the like. But this can be ignored.) Manually delete them if they are no longer required.

Last modified July 5, 2022: Initial commit (aa08305)