Fix for issue #99, Prepare to release for 5.1

    Change version in control file
    Add sql file for 1.1 & sql file to upgrade from 1.0 to 1.1
    Add new sql files in Makefile
    Add a function to get .so version
            select mongo_fdw_version();
             mongo_fdw_version
            -------------------
                         50100
            (1 row)

Makefile

@@ -24,7 +24,7 @@ PG_CPPFLAGS = --std=c99 -I$(MONGO_PATH) -I$(LIBJSON)
 OBJS = connection.o option.o  mongo_wrapper.o mongo_fdw.o mongo_query.o $(MONGO_OBJS) $(LIBJSON_OBJS)
 
 EXTENSION = mongo_fdw
-DATA = mongo_fdw--1.0.sql
+DATA = mongo_fdw--1.0.sql  mongo_fdw--1.1.sql mongo_fdw--1.0--1.1.sql
 
 REGRESS = mongo_fdw
 REGRESS_OPTS = --load-extension=$(EXTENSION)

README.md

@@ -2,7 +2,7 @@
 
 This [MongoDB][1] extension implements the PostgreSQL's Foreign Data Wrapper.
 
-Please note that this version of mongo_fdw works with PostgreSQL and EDB Postgres Advanced Server 9.3, 9.4, 9.5 and 9.6.
+Please note that this version of mongo_fdw works with PostgreSQL and EDB Postgres Advanced Server 9.3, 9.4, 9.5, 9.6 and 10.
 
 Installation
 ------------
@@ -176,6 +176,13 @@ EXPLAIN SELECT * FROM warehouse WHERE warehouse_id = 1;
 -- collect data distribution statistics`
 ANALYZE warehouse;
 
+select mongo_fdw_version();
+ mongo_fdw_version
+-------------------
+             50100
+(1 row)
+
+
 ```
 
 Limitations

mongo_fdw--1.0--1.1.sql

@@ -0,0 +1,6 @@
+/* mongo_fdw/mongo_fdw--1.0--1.1.sql */
+
+CREATE OR REPLACE FUNCTION mongo_fdw_version()
+  RETURNS pg_catalog.int4 STRICT
+  AS 'MODULE_PATHNAME' LANGUAGE C;
+

mongo_fdw--1.1.sql

@@ -0,0 +1,25 @@
+/* mongo_fdw/mongo_fdw--1.1.sql */
+
+-- Portions Copyright © 2004-2014, EnterpriseDB Corporation.
+-- Portions Copyright © 2012–2014 Citus Data, Inc.
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION mongo_fdw" to load this file. \quit
+
+CREATE FUNCTION mongo_fdw_handler()
+RETURNS fdw_handler
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION mongo_fdw_validator(text[], oid)
+RETURNS void
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FOREIGN DATA WRAPPER mongo_fdw
+  HANDLER mongo_fdw_handler
+  VALIDATOR mongo_fdw_validator;
+
+CREATE OR REPLACE FUNCTION mongo_fdw_version()
+  RETURNS pg_catalog.int4 STRICT
+  AS 'MODULE_PATHNAME' LANGUAGE C;

mongo_fdw.c

@@ -69,6 +69,12 @@
 	#include "access/htup_details.h"
 #endif
 
+/*
+ * In PG 9.5.1 the number will be 90501,
+ * our version is 5.1.0 so number will be 50100
+ */
+#define CODE_VERSION   50100
+
 
 /* Local functions forward declarations */
 static void MongoGetForeignRelSize(PlannerInfo *root, RelOptInfo *baserel,
@@ -164,6 +170,7 @@ static JsonSemAction nullSemAction =
 PG_MODULE_MAGIC;
 
 PG_FUNCTION_INFO_V1(mongo_fdw_handler);
+PG_FUNCTION_INFO_V1(mongo_fdw_version);
 
 /*
  * Library load-time initalization, sets on_proc_exit() callback for
@@ -2137,3 +2144,9 @@ MongoAcquireSampleRows(Relation relation, int errorLevel,
 
 	return sampleRowCount;
 }
+
+Datum
+mongo_fdw_version(PG_FUNCTION_ARGS)
+{
+	PG_RETURN_INT32(CODE_VERSION);
+}

mongo_fdw.control

@@ -4,6 +4,6 @@
 # Portions Copyright © 2012–2014 Citus Data, Inc.
 #
 comment = 'foreign data wrapper for MongoDB access'
-default_version = '1.0'
+default_version = '1.1'
 module_pathname = '$libdir/mongo_fdw'
 relocatable = true