Drizzled Public API Documentation

user_var_as_out_param.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
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13  * GNU General Public License for more details.
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15  * You should have received a copy of the GNU General Public License
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17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include <config.h>
21 
22 #include <cassert>
23 
24 #include <drizzled/function/user_var_as_out_param.h>
25 #include <drizzled/user_var_entry.h>
26 #include <drizzled/session.h>
27 
28 namespace drizzled {
29 
30 bool Item_user_var_as_out_param::fix_fields(Session *session, Item **ref)
31 {
32  assert(fixed == 0);
33  if (Item::fix_fields(session, ref) ||
34  !(entry= session->getVariable(name, true)))
35  return true;
36  entry->type= STRING_RESULT;
37  /*
38  Let us set the same collation which is used for loading
39  of fields in LOAD DATA INFILE.
40  (Since Item_user_var_as_out_param is used only there).
41  */
42  entry->collation.set(default_charset_info);
43  entry->update_query_id= session->getQueryId();
44  return false;
45 }
46 
47 void Item_user_var_as_out_param::set_null_value(const charset_info_st* cs)
48 {
49  entry->update_hash(true, data_ref(), STRING_RESULT, cs, DERIVATION_IMPLICIT, 0 /* unsigned_arg */);
50 }
51 
52 
53 void Item_user_var_as_out_param::set_value(str_ref str, const charset_info_st* cs)
54 {
55  entry->update_hash(false, str, STRING_RESULT, cs, DERIVATION_IMPLICIT, 0 /* unsigned_arg */);
56 }
57 
59 {
60  assert(0);
61  return 0.0;
62 }
63 
64 
66 {
67  assert(0);
68  return 0;
69 }
70 
71 
73 {
74  assert(0);
75  return 0;
76 }
77 
79 {
80  assert(0);
81  return 0;
82 }
83 
85 {
86  str->append('@');
87  str->append(name);
88 }
89 
90 } /* namespace drizzled */