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, 1 insertions, 1 deletions

diff --git a/sql/sql_help.cc b/sql/sql_help.cc
index 44293b8214f..c5a49cab3b5 100644
--- a/sql/sql_help.cc
+++ b/sql/sql_help.cc
@@ -626,7 +626,7 @@ SQL_SELECT *prepare_select_for_name(THD *thd, const char *mask, uint mlen,
 {
   Item *cond= new Item_func_like(new Item_field(pfname),
 				 new Item_string(mask,mlen,pfname->charset()),
-				 (char*) "\\");
+				 new Item_string("\\",1,&my_charset_latin1));
   if (thd->is_fatal_error)
     return 0;					// OOM
   return prepare_simple_select(thd,cond,tables,table,error);