New test case showing off the 'null if' source field option, see #80.

test/Makefile

@@ -10,6 +10,7 @@ REGRESS= allcols.load 		    \
          csv-error.load 	    \
          csv-filename-pattern.load  \
          csv-keep-extra-blanks.load \
+         csv-nulls.load             \
          csv-trim-extra-blanks.load \
          csv.load 		    \
          dbf.load 		    \

test/csv-nulls.load

@@ -0,0 +1,21 @@
+LOAD CSV
+     FROM INLINE (id, number null if '\N', data)
+     INTO postgresql:///pgloader?nullif
+
+     BEFORE LOAD DO
+      $$ drop table if exists nullif; $$,
+      $$ CREATE TABLE nullif
+         (
+            id     serial primary key,
+            number integer,
+            data   text
+         );
+      $$
+
+     WITH fields terminated by ',',
+          fields enclosed by '"',
+          fields escaped by backslash-quote;
+
+
+"1",\N,"testing nulls"
+"2","2","another test"

test/regress/expected/csv-nulls.out

@@ -0,0 +1,2 @@
+1	\N	testing nulls
+2	2	another test