Standardize pg_regress usage

Makefile

@@ -34,7 +34,7 @@ EXTRA_CLEAN = sql/$(EXTENSION)--$(EXTVERSION).sql $(EXTENSION).control
 
 TESTS = $(wildcard test/sql/*.sql)
 REGRESS = $(patsubst test/sql/%.sql,%,$(TESTS))
-REGRESS_OPTS = --use-existing --inputdir=test
+REGRESS_OPTS = --inputdir=test
 
 MODULE_big = $(EXTENSION)
 SRC = $(wildcard $(SRC_DIR)/*.c)

test/expected/00_init.out

@@ -0,0 +1,25 @@
+CREATE TABLE projects
+( id integer
+, name text
+, project_name text
+, client_id integer
+, subclient_id int
+);
+-- ensure these dropped column cases are tested
+ALTER TABLE projects DROP COLUMN project_name;
+ALTER TABLE projects DROP COLUMN subclient_id;
+INSERT INTO projects VALUES (1, 'Windows 7', 1);
+INSERT INTO projects VALUES (2, 'has,comma', 1);
+INSERT INTO projects VALUES (NULL, NULL, NULL);
+INSERT INTO projects VALUES (4, 'OSX', 2);
+INSERT INTO projects VALUES (NULL, 'has"quote', NULL);
+INSERT INTO projects VALUES (5, 'has,comma and "quote"', 7);
+INSERT INTO projects VALUES (6, E'has \n LF', 7);
+INSERT INTO projects VALUES (7, E'has \r CR', 8);
+INSERT INTO projects VALUES (8, E'has \r\n CRLF"', 8);
+create extension if not exists pg_csv;
+CREATE TABLE nasty (
+  "unusual"",names" INTEGER GENERATED ALWAYS AS IDENTITY,
+  text TEXT
+);
+INSERT INTO nasty (text) VALUES ('test');