Fix port to PostgreSQL 9.6. Thanks to Devrim Gunduz for the report.

pgtt.c

@@ -897,8 +897,14 @@ gtt_check_command(GTT_PROCESSUTILITY_PROTO)
 			Oid        relid;
 			char       *nspname;
 
-			relid = RangeVarGetRelidExtended(stmt->relation, ShareLock, 0,
-									RangeVarCallbackOwnsRelation, NULL);
+			relid = RangeVarGetRelidExtended(stmt->relation, ShareLock,
+#if (PG_VERSION_NUM >= 110000)
+				       					0,
+#else
+									false, false,
+#endif
+									RangeVarCallbackOwnsRelation,
+									NULL);
 
 			/* Just take care that the GTT is not in use */
 			nspname = get_namespace_name(get_rel_namespace(relid));
@@ -1530,7 +1536,7 @@ create_temporary_table_internal(Oid parent_relid, bool preserved)
 		{
 			CommentObject((CommentStmt *) cur_stmt);
 		}
-#if (PG_VERSION_NUM >= 100000)
+#if (PG_VERSION_NUM >= 90600)
 		else if (IsA(cur_stmt, TableLikeClause))
 		{
 			TableLikeClause *like = (TableLikeClause *) cur_stmt;
@@ -1563,7 +1569,7 @@ create_temporary_table_internal(Oid parent_relid, bool preserved)
 								 NULL, NULL,
 								 None_Receiver,
 								 NULL);
-#elif PG_VERSION_NUM >= 90500
+#else
 			ProcessUtility(cur_stmt,
 								 "PGTT provide a query string",
 								 PROCESS_UTILITY_SUBCOMMAND,

test/expected/05_useindex.out

@@ -98,14 +98,15 @@ SELECT * FROM t_glob_temptable2;
 -- Must complain that the GTT is in use
 CREATE INDEX ON t_glob_temptable2 (lbl);
 ERROR:  a temporary table has been created and is active, can not add an index on the GTT table in this session.
-\d pgtt_schema.t_glob_temptable2
-  Unlogged table "pgtt_schema.t_glob_temptable2"
- Column |  Type   | Collation | Nullable | Default 
---------+---------+-----------+----------+---------
- id     | integer |           |          | 
- lbl    | text    |           |          | 
-Indexes:
-    "t_glob_temptable2_id_idx" btree (id)
+SELECT pg_catalog.pg_get_indexdef(i.indexrelid, 0, true)
+FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i
+LEFT JOIN pg_catalog.pg_constraint con ON (conrelid = i.indrelid AND conindid = i.indexrelid AND contype IN ('p','u','x'))
+WHERE c.oid = 'pgtt_schema.t_glob_temptable2'::regclass::oid AND c.oid = i.indrelid AND i.indexrelid = c2.oid
+ORDER BY i.indisprimary DESC, c2.relname;
+                                     pg_get_indexdef                                     
+-----------------------------------------------------------------------------------------
+ CREATE INDEX t_glob_temptable2_id_idx ON pgtt_schema.t_glob_temptable2 USING btree (id)
+(1 row)
 
 \c - -
 LOAD 'pgtt';

test/sql/05_useindex.sql

@@ -75,7 +75,11 @@ SELECT * FROM t_glob_temptable2;
 -- Must complain that the GTT is in use
 CREATE INDEX ON t_glob_temptable2 (lbl);
 
-\d pgtt_schema.t_glob_temptable2
+SELECT pg_catalog.pg_get_indexdef(i.indexrelid, 0, true)
+FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i
+LEFT JOIN pg_catalog.pg_constraint con ON (conrelid = i.indrelid AND conindid = i.indexrelid AND contype IN ('p','u','x'))
+WHERE c.oid = 'pgtt_schema.t_glob_temptable2'::regclass::oid AND c.oid = i.indrelid AND i.indexrelid = c2.oid
+ORDER BY i.indisprimary DESC, c2.relname;
 
 \c - -
 LOAD 'pgtt';