Index: src/backend/utils/adt/like_match.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/adt/like_match.c,v
retrieving revision 1.27
diff -c -c -r1.27 like_match.c
*** src/backend/utils/adt/like_match.c	2 Jan 2010 16:57:54 -0000	1.27
--- src/backend/utils/adt/like_match.c	28 May 2010 15:36:09 -0000
***************
*** 139,144 ****
--- 139,146 ----
  				 * n _'s matches any string of at least n characters, and we
  				 * have now found there are at least n characters.
  				 */
+ 				while (plen > 0 && *p == '%')
+ 					NextByte(p, plen);
  				if (plen <= 0)
  					return LIKE_TRUE;
  
Index: src/test/regress/expected/strings.out
===================================================================
RCS file: /cvsroot/pgsql/src/test/regress/expected/strings.out,v
retrieving revision 1.40
diff -c -c -r1.40 strings.out
*** src/test/regress/expected/strings.out	25 Jan 2010 20:55:32 -0000	1.40
--- src/test/regress/expected/strings.out	28 May 2010 15:36:12 -0000
***************
*** 943,948 ****
--- 943,954 ----
   t
  (1 row)
  
+ SELECT 'jack' LIKE '%____%' AS "true";
+  true 
+ ------
+  t
+ (1 row)
+ 
  --
  -- test ILIKE (case-insensitive LIKE)
  -- Be sure to form every test as an ILIKE/NOT ILIKE pair.
Index: src/test/regress/sql/strings.sql
===================================================================
RCS file: /cvsroot/pgsql/src/test/regress/sql/strings.sql,v
retrieving revision 1.28
diff -c -c -r1.28 strings.sql
*** src/test/regress/sql/strings.sql	25 Jan 2010 20:55:32 -0000	1.28
--- src/test/regress/sql/strings.sql	28 May 2010 15:36:12 -0000
***************
*** 282,287 ****
--- 282,288 ----
  SELECT 'be_r' LIKE '__e__r' ESCAPE '_' AS "false";
  SELECT 'be_r' NOT LIKE '__e__r' ESCAPE '_' AS "true";
  
+ SELECT 'jack' LIKE '%____%' AS "true";
  
  --
  -- test ILIKE (case-insensitive LIKE)
***************
*** 310,316 ****
  SELECT 'foo' LIKE '__%' as t, 'foo' LIKE '___%' as t, 'foo' LIKE '____%' as f;
  SELECT 'foo' LIKE '%__' as t, 'foo' LIKE '%___' as t, 'foo' LIKE '%____' as f;
  
- 
  --
  -- test implicit type conversion
  --
--- 311,316 ----