Add regression test for consecutive newlines in COPY CSV mode. (There is

no bug related to this functionality in HEAD, but it's worth adding a test
for anyway.) From Andrew Dunstan.

src/test/regress/expected/copy2.out

@@ -191,6 +191,9 @@ COPY y TO stdout WITH CSV FORCE QUOTE col2 ESCAPE '\\';
 "Jackson, Sam","\\h"
 "It is \"perfect\".","	"
 "",
+--test that we read consecutive LFs properly
+CREATE TEMP TABLE testnl (a int, b text, c int);
+COPY testnl FROM stdin CSV;
 DROP TABLE x, y;
 DROP FUNCTION fn_x_before();
 DROP FUNCTION fn_x_after();

src/test/regress/sql/copy2.sql

@@ -129,6 +129,17 @@ COPY y TO stdout WITH CSV;
 COPY y TO stdout WITH CSV QUOTE '''' DELIMITER '|';
 COPY y TO stdout WITH CSV FORCE QUOTE col2 ESCAPE '\\';
 
+--test that we read consecutive LFs properly
+
+CREATE TEMP TABLE testnl (a int, b text, c int);
+
+COPY testnl FROM stdin CSV;
+1,"a field with two LFs
+
+inside",2
+\.
+
+
 DROP TABLE x, y;
 DROP FUNCTION fn_x_before();
 DROP FUNCTION fn_x_after();