Start a separate test suite for plpgsql

The plpgsql.sql test file in the main regression tests is now by far the
largest after numeric_big, making editing and managing the test cases
very cumbersome.  The other PLs have their own test suites split up into
smaller files by topic.  It would be nice to have that for plpgsql as
well.  So, to get that started, set up test infrastructure in
src/pl/plpgsql/src/ and split out the recently added procedure test
cases into a new file there.  That file now mirrors the test cases added
to the other PLs, making managing those matching tests a bit easier too.

msvc build system changes with help from Michael Paquier

src/pl/plpgsql/src/.gitignore

 /pl_gram.c
 /pl_gram.h
 /plerrcodes.h
+/log/
+/results/
+/tmp_check/

src/pl/plpgsql/src/Makefile

@@ -24,6 +24,8 @@ OBJS = pl_gram.o pl_handler.o pl_comp.o pl_exec.o \
 
 DATA = plpgsql.control plpgsql--1.0.sql plpgsql--unpackaged--1.0.sql
 
+REGRESS = plpgsql_call
+
 all: all-lib
 
 # Shared library stuff
@@ -65,6 +67,18 @@ pl_gram.c: BISONFLAGS += -d
 plerrcodes.h: $(top_srcdir)/src/backend/utils/errcodes.txt generate-plerrcodes.pl
 	$(PERL) $(srcdir)/generate-plerrcodes.pl $< > $@
 
+
+check: submake
+	$(pg_regress_check) $(REGRESS_OPTS) $(REGRESS)
+
+installcheck: submake
+	$(pg_regress_installcheck) $(REGRESS_OPTS) $(REGRESS)
+
+.PHONY: submake
+submake:
+	$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
+
+
 distprep: pl_gram.h pl_gram.c plerrcodes.h
 
 # pl_gram.c, pl_gram.h and plerrcodes.h are in the distribution tarball,

src/pl/plpgsql/src/expected/plpgsql_call.out

+--
+-- Tests for procedures / CALL syntax
+--
+CREATE PROCEDURE test_proc1()
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    NULL;
+END;
+$$;
+CALL test_proc1();
+-- error: can't return non-NULL
+CREATE PROCEDURE test_proc2()
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    RETURN 5;
+END;
+$$;
+CALL test_proc2();
+ERROR:  cannot return a value from a procedure
+CONTEXT:  PL/pgSQL function test_proc2() while casting return value to function's return type
+CREATE TABLE test1 (a int);
+CREATE PROCEDURE test_proc3(x int)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    INSERT INTO test1 VALUES (x);
+END;
+$$;
+CALL test_proc3(55);
+SELECT * FROM test1;
+ a  
+----
+ 55
+(1 row)
+
+DROP PROCEDURE test_proc1;
+DROP PROCEDURE test_proc2;
+DROP PROCEDURE test_proc3;
+DROP TABLE test1;

src/pl/plpgsql/src/sql/plpgsql_call.sql

+--
+-- Tests for procedures / CALL syntax
+--
+
+CREATE PROCEDURE test_proc1()
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    NULL;
+END;
+$$;
+
+CALL test_proc1();
+
+
+-- error: can't return non-NULL
+CREATE PROCEDURE test_proc2()
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    RETURN 5;
+END;
+$$;
+
+CALL test_proc2();
+
+
+CREATE TABLE test1 (a int);
+
+CREATE PROCEDURE test_proc3(x int)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    INSERT INTO test1 VALUES (x);
+END;
+$$;
+
+CALL test_proc3(55);
+
+SELECT * FROM test1;
+
+
+DROP PROCEDURE test_proc1;
+DROP PROCEDURE test_proc2;
+DROP PROCEDURE test_proc3;
+
+DROP TABLE test1;

src/test/regress/expected/plpgsql.out

@@ -6067,44 +6067,3 @@ END; $$ LANGUAGE plpgsql;
 ERROR:  "x" is not a scalar variable
 LINE 3:   GET DIAGNOSTICS x = ROW_COUNT;
                           ^
---
--- Procedures
---
-CREATE PROCEDURE test_proc1()
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    NULL;
-END;
-$$;
-CALL test_proc1();
--- error: can't return non-NULL
-CREATE PROCEDURE test_proc2()
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    RETURN 5;
-END;
-$$;
-CALL test_proc2();
-ERROR:  cannot return a value from a procedure
-CONTEXT:  PL/pgSQL function test_proc2() while casting return value to function's return type
-CREATE TABLE proc_test1 (a int);
-CREATE PROCEDURE test_proc3(x int)
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    INSERT INTO proc_test1 VALUES (x);
-END;
-$$;
-CALL test_proc3(55);
-SELECT * FROM proc_test1;
- a  
-----
- 55
-(1 row)
-
-DROP PROCEDURE test_proc1;
-DROP PROCEDURE test_proc2;
-DROP PROCEDURE test_proc3;
-DROP TABLE proc_test1;

src/test/regress/sql/plpgsql.sql

@@ -4843,52 +4843,3 @@ BEGIN
   GET DIAGNOSTICS x = ROW_COUNT;
   RETURN;
 END; $$ LANGUAGE plpgsql;
-
-
---
--- Procedures
---
-
-CREATE PROCEDURE test_proc1()
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    NULL;
-END;
-$$;
-
-CALL test_proc1();
-
-
--- error: can't return non-NULL
-CREATE PROCEDURE test_proc2()
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    RETURN 5;
-END;
-$$;
-
-CALL test_proc2();
-
-
-CREATE TABLE proc_test1 (a int);
-
-CREATE PROCEDURE test_proc3(x int)
-LANGUAGE plpgsql
-AS $$
-BEGIN
-    INSERT INTO proc_test1 VALUES (x);
-END;
-$$;
-
-CALL test_proc3(55);
-
-SELECT * FROM proc_test1;
-
-
-DROP PROCEDURE test_proc1;
-DROP PROCEDURE test_proc2;
-DROP PROCEDURE test_proc3;
-
-DROP TABLE proc_test1;

src/tools/msvc/vcregress.pl

@@ -248,23 +248,32 @@ sub taptest
 
 sub plcheck
 {
-	chdir "../../pl";
+	chdir "$topdir/src/pl";
 
-	foreach my $pl (glob("*"))
+	foreach my $dir (glob("*/src *"))
 	{
-		next unless -d "$pl/sql" && -d "$pl/expected";
-		my $lang = $pl eq 'tcl' ? 'pltcl' : $pl;
+		next unless -d "$dir/sql" && -d "$dir/expected";
+		my $lang;
+		if ($dir eq 'plpgsql/src') {
+			$lang = 'plpgsql';
+		}
+		elsif ($dir eq 'tcl') {
+			$lang = 'pltcl';
+		}
+		else {
+			$lang = $dir;
+		}
 		if ($lang eq 'plpython')
 		{
-			next unless -d "../../$Config/plpython2";
+			next unless -d "$topdir/$Config/plpython2";
 			$lang = 'plpythonu';
 		}
 		else
 		{
-			next unless -d "../../$Config/$lang";
+			next unless -d "$topdir/$Config/$lang";
 		}
 		my @lang_args = ("--load-extension=$lang");
-		chdir $pl;
+		chdir $dir;
 		my @tests = fetchTests();
 		if ($lang eq 'plperl')
 		{
@@ -285,16 +294,16 @@ sub plcheck
 		  "============================================================\n";
 		print "Checking $lang\n";
 		my @args = (
-			"../../../$Config/pg_regress/pg_regress",
-			"--bindir=../../../$Config/psql",
+			"$topdir/$Config/pg_regress/pg_regress",
+			"--bindir=$topdir/$Config/psql",
 			"--dbname=pl_regression", @lang_args, @tests);
 		system(@args);
 		my $status = $? >> 8;
 		exit $status if $status;
-		chdir "..";
+		chdir "$topdir/src/pl";
 	}
 
-	chdir "../../..";
+	chdir "$topdir";
 }
 
 sub subdircheck