Fix bug in COPY CSV mode: handle consecutive embedded newlines in COPY

input. Also add a regression test for this bug. From Andrew Dunstan.

src/backend/commands/copy.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.236 2004/12/31 21:59:41 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.236.4.1 2005/05/13 06:35:25 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2395,6 +2395,7 @@ CopyReadAttributeCSV(const char *delim, const char *null_print, char *quote,
 			if (done && line_buf.len == 0)
 				break;
 			start_cursor = line_buf.cursor;
+			continue;
 		}
 
 		end_cursor = line_buf.cursor;

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();