-Added quote_data and needs_quotes (moved from federated handler.

-New tests and results

logging_ok:
  Logging to logging@openlogging.org accepted
ha_federated.h:
  removed quote_data and type_quote (now in the Field class)
ha_federated.cc:
  moved quote_data and type_quote to field class
field.h:
  new methods quote_data and needs_quotes declared
field.cc:
  new field class methods quote_data and needs_quotes (per Monty's request)
federated.test:
  more tests, joins, index tests
have_federated_db.require:
  new name of federated system var
federated.result:
  new test results for federated handler
have_federated_db.inc:
  changed name of variable in test due to change in vars
sql_analyse.cc:
  over-ridden append_escaped to take (String *, char *, uint) per requirements of 'create_where_from_key' method in federated handler.
mysql_priv.h:
  define over-ridden append_escaped to take arguments from 'create_where_from_key' method in federated handler 
ha_federated.cc:
  implemented "create_where_from_key" to deal properly with two-byte prefix and multi keys. Initial testing shows it works, but I still need to move quoting to field class and also look at changes per Segei's suggestions.

sql/field.cc

@@ -524,6 +524,115 @@ Field *Field::new_key_field(MEM_ROOT *root, struct st_table *new_table,
   return tmp;
 }
 
+/* 
+  SYNOPSIS
+  Field::quote_data()
+     unquoted_string    Pointer pointing to the value of a field
+
+  DESCRIPTION
+    Simple method that passes the field type to the method "type_quote"
+    To get a true/false value as to whether the value in string1 needs 
+    to be enclosed with quotes. This ensures that values in the final 
+    sql statement to be passed to the remote server will be quoted properly
+
+  RETURN_VALUE
+    void      Immediately - if string doesn't need quote
+    void      Upon prepending/appending quotes on each side of variable
+
+*/
+bool Field::quote_data(String *unquoted_string)
+{
+  char escaped_string[IO_SIZE];
+  char *unquoted_string_buffer= (char *)(unquoted_string->ptr());
+  uint need_quotes;
+  
+  DBUG_ENTER("Field::quote_data");
+  // this is the same call that mysql_real_escape_string() calls
+  escape_string_for_mysql(&my_charset_bin, (char *)escaped_string,
+    unquoted_string->ptr(), unquoted_string->length());
+
+
+  if (is_null())
+    DBUG_RETURN(0);
+
+  need_quotes= needs_quotes();
+
+  if (need_quotes == 0)
+  {
+    DBUG_RETURN(0);
+  }
+  else
+  {
+    // reset string, then re-append with quotes and escaped values
+    unquoted_string->length(0);
+    if (unquoted_string->append("'"))
+      DBUG_RETURN(1);
+    if (unquoted_string->append((char *)escaped_string))
+      DBUG_RETURN(1);
+    if (unquoted_string->append("'"))
+      DBUG_RETURN(1);
+  }
+  //DBUG_PRINT("Field::quote_data",
+   // ("FINAL quote_flag %d unquoted_string %s escaped_string %s", 
+    //needs_quotes, unquoted_string->c_ptr_quick(), escaped_string));
+  DBUG_RETURN(0);
+}
+
+/*
+  Quote a field type if needed
+
+  SYNOPSIS
+    Field::type_quote
+
+  DESCRIPTION 
+    Simple method to give true/false whether a field should be quoted. 
+    Used when constructing INSERT and UPDATE queries to the remote server
+    see write_row and update_row
+
+   RETURN VALUE
+      0   if value is of type NOT needing quotes
+      1   if value is of type needing quotes
+*/
+bool Field::needs_quotes(void)
+{
+  DBUG_ENTER("Field::type_quote");
+
+  switch(type()) {
+    //FIX this when kernel is fixed
+  case MYSQL_TYPE_VARCHAR :
+  case FIELD_TYPE_STRING :
+  case FIELD_TYPE_VAR_STRING :
+  case FIELD_TYPE_YEAR :
+  case FIELD_TYPE_NEWDATE :
+  case FIELD_TYPE_TIME :
+  case FIELD_TYPE_TIMESTAMP :
+  case FIELD_TYPE_DATE :
+  case FIELD_TYPE_DATETIME :
+  case FIELD_TYPE_TINY_BLOB :
+  case FIELD_TYPE_BLOB :
+  case FIELD_TYPE_MEDIUM_BLOB :
+  case FIELD_TYPE_LONG_BLOB :
+  case FIELD_TYPE_GEOMETRY :
+    DBUG_RETURN(1);
+
+  case FIELD_TYPE_DECIMAL : 
+  case FIELD_TYPE_TINY :
+  case FIELD_TYPE_SHORT :
+  case FIELD_TYPE_INT24 :
+  case FIELD_TYPE_LONG :
+  case FIELD_TYPE_FLOAT :
+  case FIELD_TYPE_DOUBLE :
+  case FIELD_TYPE_LONGLONG :
+  case FIELD_TYPE_NULL :
+  case FIELD_TYPE_SET :
+  case FIELD_TYPE_ENUM : 
+    DBUG_RETURN(0);
+
+  default: DBUG_RETURN(0);
+  }
+  DBUG_RETURN(0);
+
+}
 
 /****************************************************************************
   Field_null, a field that always return NULL