Fix for Bug# 4200 "Parse error on LIKE ESCAPE with parameter binding"

Now ESCAPE in LIKE will accept not only string literal but constant 
delimited expression.


mysql-test/r/func_like.result:
  Added test for bug# 4200 "Parse error on LIKE ESCAPE with parameter binding"
mysql-test/t/func_like.test:
  Added test for bug# 4200 "Parse error on LIKE ESCAPE with parameter binding"
sql/item_cmpfunc.cc:
  Added support for accepting of constant delimited expression as ESCAPE argument to
  Item_func_like.
sql/item_cmpfunc.h:
  Now ESCAPE clause in LIKE will accept not only string literal but constant delimited 
  expression. Thus added member to Item_func_like for storing Item corresponding to this
  expression and changed third argument of cons to be Item* instead of char*.
sql/sql_help.cc:
  Item_func_like now accepts Item* as third argument.
sql/sql_yacc.yy:
  Now ESCAPE clause of LIKE accepts not only string literal but constant delimited expression
  (the most important case is prepared statement parameter of course).

1 files changed, 6 insertions, 0 deletions

diff --git a/mysql-test/r/func_like.result b/mysql-test/r/func_like.result
index 75692738caf..f2c11bc51f6 100644
--- a/mysql-test/r/func_like.result
+++ b/mysql-test/r/func_like.result
@@ -45,6 +45,12 @@ a\b
 select * from t1 where a like 'a\\%' escape '#' and a like 'a\\\\b';
 a
 a\b
+prepare stmt1 from 'select * from t1 where a like \'a\\%\' escape ?';
+set @esc='#';
+execute stmt1 using @esc;
+a
+a\b
+deallocate prepare stmt1;
 drop table t1;
 create table t1 (a datetime);
 insert into t1 values ('2004-03-11 12:00:21');