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Accessing SQL Server with PXF

This example demonstrates how to connect to SQL Server 2016 using PXF.

1. PXF Installation

sudo yum install pxf-matrixdb3-5.16.1-1.el7.x86_64.rpm -y
sudo mkdir /usr/local/pxfconf
sudo chown mxadmin.mxadmin -R /usr/local/pxfconf
sudo chown mxadmin.mxadmin -R /usr/local/pxf-matrixdb4

export PXF_HOME=/usr/local/pxf-matrixdb4
export PXF_CONF=/usr/local/pxfconf
export PATH=$PXF_HOME/bin:$PATH

cd $PXF_CONF/servers
mkdir sqlserv_server

2. Configuration

Initialize PXF:

pxf cluster init

Download the JDBC driver from:
https://docs.microsoft.com/en-us/sql/connect/jdbc/using-the-jdbc-driver?view=sql-server-ver15
File: sqljdbc4.jar

Copy the JDBC driver to the PXF library directory (required on all nodes):

cp sqljdbc4.jar $PXF_CONF/lib

Synchronize configuration to all cluster nodes:

pxf cluster sync

3. Start and Check Cluster Status

Start PXF services on all nodes:

pxf cluster start

Check cluster status:

pxf cluster status

4. Access SQL Server

Create the extension:

postgres=# CREATE EXTENSION pxf_fdw ;
CREATE EXTENSION

Define the foreign server:

DROP SERVER sqlserv_server CASCADE;

CREATE SERVER sqlserv_server FOREIGN DATA WRAPPER jdbc_pxf_fdw OPTIONS (
    jdbc_driver 'com.microsoft.sqlserver.jdbc.SQLServerDriver',
    db_url 'jdbc:sqlserver://{ip}:{port};databaseName={database_name}',
    batch_size '10000',
    fetch_size '2000'
);

Create a user mapping:

CREATE USER MAPPING FOR mxadmin SERVER sqlserv_server OPTIONS (user '{username}', pass '{password}');

Create a foreign table:

CREATE FOREIGN TABLE foreign_sqlserver (
    id int4,
    banzu varchar(20),
    banzu_name varchar(50),
    realdate timestamp
)
SERVER sqlserv_server
OPTIONS (resource '{source_database_schema.table_name}');

Query data from SQL Server through the foreign table:

SELECT * FROM foreign_sqlserver LIMIT 10;
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