Drizzled Public API Documentation

drop_schema.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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4  * Copyright (C) 2009 Sun Microsystems, Inc.
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19  */
20 
21 #include <config.h>
22 
23 #include <drizzled/show.h>
24 #include <drizzled/session.h>
25 #include <drizzled/statement/drop_schema.h>
26 #include <drizzled/plugin/event_observer.h>
27 #include <drizzled/sql_lex.h>
28 #include <drizzled/schema.h>
29 
30 #include <string>
31 
32 using namespace std;
33 
34 namespace drizzled {
35 
36 bool statement::DropSchema::execute()
37 {
38  if (session().inTransaction())
39  {
40  my_error(ER_TRANSACTIONAL_DDL_NOT_SUPPORTED, MYF(0));
41  return true;
42  }
43 
44  identifier::Schema schema_identifier(to_string(lex().name));
45 
46  if (not schema::check(session(), schema_identifier))
47  {
48  my_error(ER_WRONG_DB_NAME, schema_identifier);
49  return false;
50  }
51 
52  if (session().inTransaction())
53  {
54  my_message(ER_LOCK_OR_ACTIVE_TRANSACTION, ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
55  return true;
56  }
57 
58  bool res = true;
59  std::string path = schema_identifier.getSQLPath();
60  if (unlikely(plugin::EventObserver::beforeDropDatabase(session(), path)))
61  {
62  my_error(ER_EVENT_OBSERVER_PLUGIN, schema_identifier);
63  }
64  else
65  {
66  res= schema::drop(session(), schema_identifier, drop_if_exists);
67  if (unlikely(plugin::EventObserver::afterDropDatabase(session(), path, res)))
68  {
69  my_error(ER_EVENT_OBSERVER_PLUGIN, MYF(0), path.c_str());
70  res = false;
71  }
72 
73  }
74 
75  return res;
76 }
77 
78 } /* namespace drizzled */