after review fix

mysql-test/r/func_str.result:
  new results
sql/item.cc:
  charset changed
  printing string moved to String
sql/item_cmpfunc.cc:
  new comparation class builder to avoid long switch
  new print_agrs used
sql/item_cmpfunc.h:
  new comparation class builder to avoid long switch
sql/item_func.cc:
  new print_agrs
sql/item_func.h:
  new print_agrs
sql/item_strfunc.cc:
  new print_agrs
sql/item_subselect.cc:
  new comparation class builder to avoid long switch
sql/item_subselect.h:
  new comparation class builder to avoid long switch
sql/item_timefunc.cc:
  charset changed
sql/mysql_priv.h:
  new comparation class builder to avoid long switch
sql/mysqld.cc:
  new comparation class builder to avoid long switch
sql/sql_parse.cc:
  new comparation class builder to avoid long switch
sql/sql_string.cc:
  string printing moved to String class
sql/sql_string.h:
  string printing moved to String class
sql/sql_yacc.yy:
  birect class creation where it is possible

1 files changed, 32 insertions, 0 deletions

diff --git a/sql/sql_string.cc b/sql/sql_string.cc
index be9404ce0b8..61070f07266 100644
--- a/sql/sql_string.cc
+++ b/sql/sql_string.cc
@@ -680,3 +680,35 @@ outp:
   }
   return (uint32) (to - to_start);
 }
+
+void String::print(String *str)
+{
+  char *st= (char*)Ptr, *end= st+str_length;
+  for(; st < end; st++)
+  {
+    uchar c= *st;
+    switch (c)
+    {
+    case '\\':
+      str->append("\\\\", 2);
+      break;
+    case '\0':
+      str->append("\\0", 2);
+      break;
+    case '\'':
+      str->append("\\'", 2);
+      break;
+    case '\n':
+      str->append("\\n", 2);
+      break;
+    case '\r':
+      str->append("\\r", 2);
+      break;
+    case 26: //Ctrl-Z
+      str->append("\\z", 2);
+      break;
+    default:
+      str->append(c);
+    }
+  }
+}