lo: Add test suite

Reviewed-by: David Steele <david@pgmasters.net>

contrib/lo/.gitignore

+# Generated subdirectories
+/log/
+/results/
+/tmp_check/

contrib/lo/Makefile

@@ -6,6 +6,8 @@ EXTENSION = lo
 DATA = lo--1.1.sql lo--1.0--1.1.sql lo--unpackaged--1.0.sql
 PGFILEDESC = "lo - management for large objects"
 
+REGRESS = lo
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)

contrib/lo/expected/lo.out

+CREATE EXTENSION lo;
+CREATE TABLE image (title text, raster lo);
+CREATE TRIGGER t_raster BEFORE UPDATE OR DELETE ON image
+    FOR EACH ROW EXECUTE PROCEDURE lo_manage(raster);
+SELECT lo_create(43213);
+ lo_create 
+-----------
+     43213
+(1 row)
+
+SELECT lo_create(43214);
+ lo_create 
+-----------
+     43214
+(1 row)
+
+INSERT INTO image (title, raster) VALUES ('beautiful image', 43213);
+SELECT lo_get(43213);
+ lo_get 
+--------
+ \x
+(1 row)
+
+SELECT lo_get(43214);
+ lo_get 
+--------
+ \x
+(1 row)
+
+UPDATE image SET raster = 43214 WHERE title = 'beautiful image';
+SELECT lo_get(43213);
+ERROR:  large object 43213 does not exist
+SELECT lo_get(43214);
+ lo_get 
+--------
+ \x
+(1 row)
+
+DELETE FROM image;
+SELECT lo_get(43214);
+ERROR:  large object 43214 does not exist
+DROP TABLE image;

contrib/lo/sql/lo.sql

+CREATE EXTENSION lo;
+
+CREATE TABLE image (title text, raster lo);
+
+CREATE TRIGGER t_raster BEFORE UPDATE OR DELETE ON image
+    FOR EACH ROW EXECUTE PROCEDURE lo_manage(raster);
+
+SELECT lo_create(43213);
+SELECT lo_create(43214);
+
+INSERT INTO image (title, raster) VALUES ('beautiful image', 43213);
+
+SELECT lo_get(43213);
+SELECT lo_get(43214);
+
+UPDATE image SET raster = 43214 WHERE title = 'beautiful image';
+
+SELECT lo_get(43213);
+SELECT lo_get(43214);
+
+DELETE FROM image;
+
+SELECT lo_get(43214);
+
+DROP TABLE image;

doc/src/sgml/lo.sgml

@@ -67,7 +67,7 @@
   </para>
 
 <programlisting>
-CREATE TABLE image (title TEXT, raster lo);
+CREATE TABLE image (title text, raster lo);
 
 CREATE TRIGGER t_raster BEFORE UPDATE OR DELETE ON image
     FOR EACH ROW EXECUTE PROCEDURE lo_manage(raster);