tds connection to mssql

tds.md

@@ -0,0 +1,52 @@
+install tds on ubuntu to connect to mssql from pgsql
+
+https://github.com/tds-fdw/tds_fdw/blob/master/InstallUbuntu.md
+
+copy and build tds_fdw:
+
+```
+export TDS_FDW_VERSION="2.0.3"
+sudo apt-get install wget
+wget https://github.com/tds-fdw/tds_fdw/archive/v${TDS_FDW_VERSION}.tar.gz
+tar -xvzf v${TDS_FDW_VERSION}.tar.gz
+cd tds_fdw-${TDS_FDW_VERSION}/
+sudo chown ptrowbridge:ptrowbridge -R tds_fdw-2.0.3/
+make USE_PGXS=1
+sudo make USE_PGXS=1 install
+```
+
+create extension in postgres:
+`CREATE EXTENSION tds_fdw;`
+
+create foreign server:
+```
+CREATE SERVER mssql_svr
+	FOREIGN DATA WRAPPER tds_fdw
+	OPTIONS (servername '127.0.0.1', port '1433', database 'tds_fdw_test', tds_version '7.1');
+```
+`create server usmidsql01 foreign data wrapper tds_fdw options (servername 'usmidsql01', port '1433', database 'fanalysis', tds_version '7.1');`
+
+create user mapping:
+`CREATE USER MAPPING FOR ptrowbridge SERVER usmidsql01 OPTIONS (username 'Pricing', password '');`
+
+to extract the schema into a single table that describes the schema do:
+`IMPORT FOREIGN SCHEMA dbo FROM SERVER usmidsql01 INTO pricequote_dbo;`
+and this will create a table call pricequote_dbo."UNCONTRAINED_COLUMNS"
+
+create foreign table:
+```
+CREATE FOREIGN TABLE pricequote.pl (
+    quote integer
+    ,billto text
+    ,shipto text
+    ,cdate timestamp
+    ,value numeric(18,9)
+    ,title text
+    ,descr text
+    ,comment text
+    ,url text
+    ,srce text
+)
+SERVER usmidsql01 OPTIONS (table_name 'fanalysis.rlarp.pl')
+```
+