Add more tests related with #87 issue

Author: ildus

expected/pathman_utility_stmt.out

@@ -256,8 +256,33 @@ SELECT * FROM copy_stmt_hooking.test ORDER BY val;
    6 | hash_2  |  0 |  0
 (2 rows)
 
+/* Check dropped colums before partitioning */
+CREATE TABLE copy_stmt_hooking.test2 (
+	a varchar(50),
+	b varchar(50),
+	t timestamp without time zone not null
+);
+ALTER TABLE copy_stmt_hooking.test2 DROP COLUMN a;
+SELECT create_range_partitions('copy_stmt_hooking.test2',
+	't',
+	'2017-01-01 00:00:00'::timestamp,
+	interval '1 hour', 5, false
+);
+NOTICE:  sequence "test2_seq" does not exist, skipping
+ create_range_partitions 
+-------------------------
+                       5
+(1 row)
+
+COPY copy_stmt_hooking.test2(t) FROM stdin;
+SELECT COUNT(*) FROM copy_stmt_hooking.test2;
+ count 
+-------
+     1
+(1 row)
+
 DROP SCHEMA copy_stmt_hooking CASCADE;
-NOTICE:  drop cascades to 7 other objects
+NOTICE:  drop cascades to 798 other objects
 /*
  * Test auto check constraint renaming
  */

sql/pathman_utility_stmt.sql

@@ -139,6 +139,23 @@ COPY copy_stmt_hooking.test FROM stdin;
 SELECT count(*) FROM ONLY copy_stmt_hooking.test;
 SELECT * FROM copy_stmt_hooking.test ORDER BY val;
 
+/* Check dropped colums before partitioning */
+CREATE TABLE copy_stmt_hooking.test2 (
+	a varchar(50),
+	b varchar(50),
+	t timestamp without time zone not null
+);
+ALTER TABLE copy_stmt_hooking.test2 DROP COLUMN a;
+SELECT create_range_partitions('copy_stmt_hooking.test2',
+	't',
+	'2017-01-01 00:00:00'::timestamp,
+	interval '1 hour', 5, false
+);
+COPY copy_stmt_hooking.test2(t) FROM stdin;
+2017-02-02 20:00:00
+\.
+SELECT COUNT(*) FROM copy_stmt_hooking.test2;
+
 DROP SCHEMA copy_stmt_hooking CASCADE;